AudioFX: Code style cleanup

* Format with AOSP code style in Android Studio

Change-Id: I3d5e2f467347561009b98251a2e3ba04d9870079

35 files changed, 644 insertions, 561 deletions

diff --git a/src/org/lineageos/audiofx/AudioFxApplication.java b/src/org/lineageos/audiofx/AudioFxApplication.java
index 7079ee8..93b1c58 100644
--- a/src/org/lineageos/audiofx/AudioFxApplication.java
+++ b/src/org/lineageos/audiofx/AudioFxApplication.java
@@ -16,7 +16,6 @@
 package org.lineageos.audiofx;
 
 import android.app.Application;
-import android.util.Log;
 
 public class AudioFxApplication extends Application {
 
diff --git a/src/org/lineageos/audiofx/Compatibility.java b/src/org/lineageos/audiofx/Compatibility.java
index e78d154..28c87ac 100644
--- a/src/org/lineageos/audiofx/Compatibility.java
+++ b/src/org/lineageos/audiofx/Compatibility.java
@@ -30,19 +30,17 @@ import android.media.audiofx.AudioEffect;
 import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
+
 import org.lineageos.audiofx.activity.ActivityMusic;
 
 import java.util.List;
 
 /**
- * Provide backwards compatibility for existing control panels.
- * There are two major parts to this:
- * - a BroadcastReceiver that listens for installed or removed packages, and
- *   enables or disables control panel receivers as needed to ensure that only
- *   one control panel package will receive the broadcasts that applications end
- * - a high priority control panel activity that redirects to the currently
- *   selected control panel activity
- *
+ * Provide backwards compatibility for existing control panels. There are two major parts to this: -
+ * a BroadcastReceiver that listens for installed or removed packages, and enables or disables
+ * control panel receivers as needed to ensure that only one control panel package will receive the
+ * broadcasts that applications end - a high priority control panel activity that redirects to the
+ * currently selected control panel activity
  */
 public class Compatibility {
 
@@ -52,9 +50,8 @@ public class Compatibility {
 
 
     /**
-     * This activity has an intent filter with the highest possible priority, so
-     * it will always be chosen. It then looks up the correct control panel to
-     * use and launches that.
+     * This activity has an intent filter with the highest possible priority, so it will always be
+     * chosen. It then looks up the correct control panel to use and launches that.
      */
     public static class Redirector extends Activity {
 
@@ -88,13 +85,11 @@ public class Compatibility {
     }
 
     /**
-     * This BroadcastReceiver responds to BOOT_COMPLETED, PACKAGE_ADDED,
-     * PACKAGE_REPLACED and PACKAGE_REMOVED intents. When run, it checks
-     * to see whether the active control panel needs to be updated:
-     * - if there is no default, it picks one
-     * - if a new control panel is installed, it becomes the default
-     * It then enables the open/close receivers in the active control panel,
-     * and disables them in the others.
+     * This BroadcastReceiver responds to BOOT_COMPLETED, PACKAGE_ADDED, PACKAGE_REPLACED and
+     * PACKAGE_REMOVED intents. When run, it checks to see whether the active control panel needs to
+     * be updated: - if there is no default, it picks one - if a new control panel is installed, it
+     * becomes the default It then enables the open/close receivers in the active control panel, and
+     * disables them in the others.
      */
     public static class Receiver extends BroadcastReceiver {
 
@@ -150,13 +145,14 @@ public class Compatibility {
             ResolveInfo otherPanel = null;
             ResolveInfo thisPanel = null;
             Intent i = new Intent(AudioEffect.ACTION_DISPLAY_AUDIO_EFFECT_CONTROL_PANEL);
-            List<ResolveInfo> ris = mPackageManager.queryIntentActivities(i, PackageManager.GET_DISABLED_COMPONENTS);
+            List<ResolveInfo> ris = mPackageManager.queryIntentActivities(i,
+                    PackageManager.GET_DISABLED_COMPONENTS);
             log("found: " + ris.size());
             SharedPreferences pref = Constants.getMusicFxPrefs(this);
             String savedDefPackage = pref.getString(Constants.MUSICFX_DEFAULT_PACKAGE_KEY, null);
             String savedDefName = pref.getString(Constants.MUSICFX_DEFAULT_PANEL_KEY, null);
             log("saved default: " + savedDefName);
-            for (ResolveInfo foo: ris) {
+            for (ResolveInfo foo : ris) {
                 if (foo.activityInfo.name.equals(Compatibility.Redirector.class.getName())) {
                     log("skipping " + foo);
                     continue;
@@ -171,7 +167,8 @@ public class Compatibility {
                 } else if (foo.activityInfo.packageName.equals(updatedPackage)) {
                     log("choosing newly installed package " + updatedPackage);
                     otherPanel = foo;
-                } else if (otherPanel == null && !foo.activityInfo.packageName.equals(getPackageName())) {
+                } else if (otherPanel == null && !foo.activityInfo.packageName.equals(
+                        getPackageName())) {
                     otherPanel = foo;
                 } else {
                     thisPanel = foo;
@@ -200,11 +197,13 @@ public class Compatibility {
 
         private void setDefault(String defPackage, String defName) {
             Intent i = new Intent(AudioEffect.ACTION_OPEN_AUDIO_EFFECT_CONTROL_SESSION);
-            List<ResolveInfo> ris = mPackageManager.queryBroadcastReceivers(i, PackageManager.GET_DISABLED_COMPONENTS);
+            List<ResolveInfo> ris = mPackageManager.queryBroadcastReceivers(i,
+                    PackageManager.GET_DISABLED_COMPONENTS);
             setupReceivers(ris, defPackage);
             // The open and close receivers are likely the same, but they may not be.
             i = new Intent(AudioEffect.ACTION_CLOSE_AUDIO_EFFECT_CONTROL_SESSION);
-            ris = mPackageManager.queryBroadcastReceivers(i, PackageManager.GET_DISABLED_COMPONENTS);
+            ris = mPackageManager.queryBroadcastReceivers(i,
+                    PackageManager.GET_DISABLED_COMPONENTS);
             setupReceivers(ris, defPackage);
 
             // Write the selected default to the prefs so that the Redirector activity
@@ -222,8 +221,9 @@ public class Compatibility {
             // broadcast to newly enabled receivers, while sending "close session" to
             // receivers that are about to be disabled. We could also consider just
             // killing the process hosting the disabled components.
-            for (ResolveInfo foo: ris) {
-                ComponentName comp = new ComponentName(foo.activityInfo.packageName, foo.activityInfo.name);
+            for (ResolveInfo foo : ris) {
+                ComponentName comp = new ComponentName(foo.activityInfo.packageName,
+                        foo.activityInfo.name);
                 if (foo.activityInfo.packageName.equals(defPackage)) {
                     log("enabling receiver " + foo);
                     mPackageManager.setComponentEnabledSetting(comp,
diff --git a/src/org/lineageos/audiofx/Constants.java b/src/org/lineageos/audiofx/Constants.java
index d5a0253..5410bd5 100644
--- a/src/org/lineageos/audiofx/Constants.java
+++ b/src/org/lineageos/audiofx/Constants.java
@@ -17,6 +17,7 @@ package org.lineageos.audiofx;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+
 import org.lineageos.audiofx.eq.EqUtils;
 
 import java.util.ArrayList;
@@ -108,7 +109,8 @@ public class Constants {
     }
 
     public static void saveCustomPresets(Context ctx, List<Preset> presets) {
-        final SharedPreferences.Editor presetPrefs = ctx.getSharedPreferences("custom_presets", 0).edit();
+        final SharedPreferences.Editor presetPrefs = ctx.getSharedPreferences("custom_presets",
+                0).edit();
         presetPrefs.clear();
 
         StringBuffer presetNames = new StringBuffer();
@@ -132,7 +134,8 @@ public class Constants {
     }
 
     public static int[] getBandLevelRange(Context context) {
-        String savedCenterFreqs = context.getSharedPreferences("global", 0).getString("equalizer.band_level_range", null);
+        String savedCenterFreqs = context.getSharedPreferences("global", 0).getString(
+                "equalizer.band_level_range", null);
         if (savedCenterFreqs == null || savedCenterFreqs.isEmpty()) {
             return new int[]{-1500, 1500};
         } else {
@@ -146,7 +149,8 @@ public class Constants {
     }
 
     public static int[] getCenterFreqs(Context context, int eqBands) {
-        String savedCenterFreqs = context.getSharedPreferences("global", 0).getString("equalizer.center_freqs",
+        String savedCenterFreqs = context.getSharedPreferences("global", 0).getString(
+                "equalizer.center_freqs",
                 EqUtils.getZeroedBandsString(eqBands));
         String[] split = savedCenterFreqs.split(";");
         int[] freqs = new int[split.length];
diff --git a/src/org/lineageos/audiofx/Preset.java b/src/org/lineageos/audiofx/Preset.java
index 5d3c0ba..64f2df1 100644
--- a/src/org/lineageos/audiofx/Preset.java
+++ b/src/org/lineageos/audiofx/Preset.java
@@ -17,6 +17,7 @@ package org.lineageos.audiofx;
 
 import android.os.Parcel;
 import android.os.Parcelable;
+
 import org.lineageos.audiofx.eq.EqUtils;
 
 public class Preset implements Parcelable {
@@ -63,7 +64,7 @@ public class Preset implements Parcelable {
                 return false;
             }
 
-            for(int i = 0; i < mLevels.length; i++) {
+            for (int i = 0; i < mLevels.length; i++) {
                 if (mLevels[i] != other.mLevels[i]) {
                     return false;
                 }
diff --git a/src/org/lineageos/audiofx/activity/ActivityMusic.java b/src/org/lineageos/audiofx/activity/ActivityMusic.java
index f467c2c..2e996b9 100644
--- a/src/org/lineageos/audiofx/activity/ActivityMusic.java
+++ b/src/org/lineageos/audiofx/activity/ActivityMusic.java
@@ -28,11 +28,10 @@ import android.view.View;
 import android.view.ViewStub;
 import android.widget.CompoundButton;
 import android.widget.Switch;
-import org.lineageos.audiofx.AudioFxApplication;
+
 import org.lineageos.audiofx.Constants;
 import org.lineageos.audiofx.R;
 import org.lineageos.audiofx.fragment.AudioFxFragment;
-import org.lineageos.audiofx.knobs.KnobCommander;
 import org.lineageos.audiofx.service.AudioFxService;
 import org.lineageos.audiofx.service.DevicePreferenceManager;
 
@@ -51,20 +50,21 @@ public class ActivityMusic extends Activity {
     private boolean mWaitingForService = true;
     private SharedPreferences.OnSharedPreferenceChangeListener mServiceReadyObserver;
 
-    private CompoundButton.OnCheckedChangeListener mGlobalEnableToggleListener
+    private final CompoundButton.OnCheckedChangeListener mGlobalEnableToggleListener
             = new CompoundButton.OnCheckedChangeListener() {
         @Override
         public void onCheckedChanged(final CompoundButton buttonView,
-                                     final boolean isChecked) {
+                final boolean isChecked) {
             mConfig.setCurrentDeviceEnabled(isChecked);
         }
     };
 
     @Override
     public void onCreate(final Bundle savedInstanceState) {
-        if (DEBUG)
+        if (DEBUG) {
             Log.i(TAG, "onCreate() called with "
                     + "savedInstanceState = [" + savedInstanceState + "]");
+        }
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
@@ -81,7 +81,7 @@ public class ActivityMusic extends Activity {
             mServiceReadyObserver = new SharedPreferences.OnSharedPreferenceChangeListener() {
                 @Override
                 public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
-                                                      String key) {
+                        String key) {
                     if (key.equals(Constants.SAVED_DEFAULTS) && defaultsSetup()) {
                         sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
                         mConfig.onResetDefaults();
@@ -112,7 +112,8 @@ public class ActivityMusic extends Activity {
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
-        // should null it out if one was there, compat redirector with package will go through onCreate
+        // should null it out if one was there, compat redirector with package will go through
+        // onCreate
         mCallingPackage = intent.getStringExtra(EXTRA_CALLING_PACKAGE);
     }
 
@@ -140,7 +141,7 @@ public class ActivityMusic extends Activity {
         ab.setCustomView(extraView, lp);
         ab.setDisplayShowCustomEnabled(true);
 
-        mCurrentDeviceToggle = (Switch) ab.getCustomView().findViewById(R.id.global_toggle);
+        mCurrentDeviceToggle = ab.getCustomView().findViewById(R.id.global_toggle);
         mCurrentDeviceToggle.setOnCheckedChangeListener(mGlobalEnableToggleListener);
 
         if (savedInstanceState == null && findViewById(R.id.main_fragment) != null) {
@@ -157,7 +158,7 @@ public class ActivityMusic extends Activity {
         if (mConfig.hasMaxxAudio()) {
             ab.setSubtitle(R.string.powered_by_maxx_audio);
         } else if (mConfig.hasDts()) {
-            final ViewStub stub = (ViewStub) ab.getCustomView().findViewById(R.id.logo_stub);
+            final ViewStub stub = ab.getCustomView().findViewById(R.id.logo_stub);
             stub.setLayoutResource(R.layout.action_bar_dts_logo);
             stub.inflate();
         }
@@ -166,8 +167,10 @@ public class ActivityMusic extends Activity {
     @Override
     public void onConfigurationChanged(Configuration newConfig) {
         super.onConfigurationChanged(newConfig);
-        if (DEBUG) Log.i(TAG, "onConfigurationChanged() called with "
-                + "newConfig = [" + newConfig + "]");
+        if (DEBUG) {
+            Log.i(TAG, "onConfigurationChanged() called with "
+                    + "newConfig = [" + newConfig + "]");
+        }
         if (newConfig.orientation != getResources().getConfiguration().orientation) {
             mCurrentDeviceToggle = null;
         }
diff --git a/src/org/lineageos/audiofx/activity/ControlPanelPicker.java b/src/org/lineageos/audiofx/activity/ControlPanelPicker.java
index 1ccab78..f70ec9d 100644
--- a/src/org/lineageos/audiofx/activity/ControlPanelPicker.java
+++ b/src/org/lineageos/audiofx/activity/ControlPanelPicker.java
@@ -16,12 +16,6 @@
 
 package org.lineageos.audiofx.activity;
 
-import com.android.internal.app.AlertActivity;
-import com.android.internal.app.AlertController;
-import com.android.internal.app.AlertController.AlertParams.OnPrepareListViewListener;
-import org.lineageos.audiofx.Compatibility;
-import org.lineageos.audiofx.Compatibility.Service;
-
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
@@ -33,6 +27,13 @@ import android.database.MatrixCursor;
 import android.media.audiofx.AudioEffect;
 import android.os.Bundle;
 import android.widget.ListView;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+import com.android.internal.app.AlertController.AlertParams.OnPrepareListViewListener;
+
+import org.lineageos.audiofx.Compatibility;
+import org.lineageos.audiofx.Compatibility.Service;
 import org.lineageos.audiofx.R;
 
 import java.util.List;
@@ -40,31 +41,32 @@ import java.util.List;
 /**
  * shows a dialog that lets the user switch between control panels
  */
-public class ControlPanelPicker extends AlertActivity implements OnClickListener, OnPrepareListViewListener {
+public class ControlPanelPicker extends AlertActivity implements OnClickListener,
+        OnPrepareListViewListener {
 
-    
 
     @Override
     public void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        String [] cols = new String [] { "_id", "title", "package", "name" };
+        String[] cols = new String[]{"_id", "title", "package", "name"};
         MatrixCursor c = new MatrixCursor(cols);
 
         PackageManager pmgr = getPackageManager();
         Intent i = new Intent(AudioEffect.ACTION_DISPLAY_AUDIO_EFFECT_CONTROL_PANEL);
-        List<ResolveInfo> ris = pmgr.queryIntentActivities(i, PackageManager.GET_DISABLED_COMPONENTS);
+        List<ResolveInfo> ris = pmgr.queryIntentActivities(i,
+                PackageManager.GET_DISABLED_COMPONENTS);
         SharedPreferences pref = getSharedPreferences("musicfx", MODE_PRIVATE);
         String savedDefPackage = pref.getString("defaultpanelpackage", null);
         String savedDefName = pref.getString("defaultpanelname", null);
         int cnt = -1;
         int defpanelidx = 0;
-        for (ResolveInfo foo: ris) {
+        for (ResolveInfo foo : ris) {
             if (foo.activityInfo.name.equals(Compatibility.Redirector.class.getName())) {
                 continue;
             }
             CharSequence name = pmgr.getApplicationLabel(foo.activityInfo.applicationInfo);
-            c.addRow(new Object [] { 0, name, foo.activityInfo.packageName, foo.activityInfo.name });
+            c.addRow(new Object[]{0, name, foo.activityInfo.packageName, foo.activityInfo.name});
             cnt += 1;
             if (foo.activityInfo.name.equals(savedDefName) &&
                     foo.activityInfo.packageName.equals(savedDefPackage) &&
@@ -73,7 +75,7 @@ public class ControlPanelPicker extends AlertActivity implements OnClickListener
                 defpanelidx = cnt;
             }
         }
-        
+
         final AlertController.AlertParams p = mAlertParams;
         p.mCursor = c;
         p.mOnClickListener = mItemClickListener;
@@ -85,7 +87,7 @@ public class ControlPanelPicker extends AlertActivity implements OnClickListener
         p.mOnPrepareListViewListener = this;
         p.mTitle = getString(R.string.picker_title);
         p.mCheckedItem = defpanelidx;
-        
+
         setupAlert();
     }
 
@@ -97,15 +99,15 @@ public class ControlPanelPicker extends AlertActivity implements OnClickListener
         return getResources().getIdentifier("cancel", "string", "android");
     }
 
-    private DialogInterface.OnClickListener mItemClickListener =
-        new DialogInterface.OnClickListener() {
+    private final DialogInterface.OnClickListener mItemClickListener =
+            new DialogInterface.OnClickListener() {
 
-        public void onClick(DialogInterface dialog, int which) {
-            // Save the position of most recently clicked item
-            mAlertParams.mCheckedItem = which;
-        }
-        
-    };
+                public void onClick(DialogInterface dialog, int which) {
+                    // Save the position of most recently clicked item
+                    mAlertParams.mCheckedItem = which;
+                }
+
+            };
 
     @Override
     public void onClick(DialogInterface dialog, int which) {
diff --git a/src/org/lineageos/audiofx/activity/EqualizerManager.java b/src/org/lineageos/audiofx/activity/EqualizerManager.java
index 0ec055d..0667f19 100644
--- a/src/org/lineageos/audiofx/activity/EqualizerManager.java
+++ b/src/org/lineageos/audiofx/activity/EqualizerManager.java
@@ -54,7 +54,7 @@ public class EqualizerManager {
     private float[] mCenterFreqs;
     private float[] mGlobalLevels;
 
-    private AtomicBoolean mAnimatingToCustom = new AtomicBoolean(false);
+    private final AtomicBoolean mAnimatingToCustom = new AtomicBoolean(false);
 
     // whether we are in between presets, animating them and such
     private boolean mChangingPreset = false;
@@ -69,7 +69,7 @@ public class EqualizerManager {
     private static final int MSG_SAVE_PRESETS = 1;
     private static final int MSG_SEND_EQ_OVERRIDE = 2;
 
-    private Handler mHandler = new Handler(new Handler.Callback() {
+    private final Handler mHandler = new Handler(new Handler.Callback() {
         @Override
         public boolean handleMessage(Message msg) {
             switch (msg.what) {
@@ -77,11 +77,12 @@ public class EqualizerManager {
                     Constants.saveCustomPresets(mContext, mEqPresets);
                     break;
                 case MSG_SEND_EQ_OVERRIDE:
-                    mConfig.overrideEqLevels((short)msg.arg1, (short) msg.arg2);
+                    mConfig.overrideEqLevels((short) msg.arg1, (short) msg.arg2);
                     break;
             }
             return true;
-        }}, true);
+        }
+    }, true);
 
     public EqualizerManager(Context context, MasterConfigControl config) {
         mContext = context;
@@ -116,7 +117,8 @@ public class EqualizerManager {
         mCenterFreqs = Arrays.copyOf(centerFreqsKHz, mNumBands);
         System.arraycopy(centerFreqsKHz, 0, mCenterFreqs, 0, mNumBands);
         mMinFreq = mCenterFreqs[0] / 2;
-        mMaxFreq = (float) Math.pow(mCenterFreqs[mNumBands - 1], 2) / mCenterFreqs[mNumBands - 2] / 2;
+        mMaxFreq = (float) Math.pow(mCenterFreqs[mNumBands - 1], 2) / mCenterFreqs[mNumBands - 2]
+                / 2;
 
         // setup equalizer presets
         final int numPresets = Integer.parseInt(getGlobalPref("equalizer.number_of_presets", "0"));
@@ -124,9 +126,11 @@ public class EqualizerManager {
         if (numPresets > 0) {
             // add library-provided presets
             String[] presetNames = getGlobalPref("equalizer.preset_names", "").split("\\|");
-            mPredefinedPresets = presetNames.length + 1; // we consider first EQ to be part of predefined
+            mPredefinedPresets =
+                    presetNames.length + 1; // we consider first EQ to be part of predefined
             for (int i = 0; i < numPresets; i++) {
-                mEqPresets.add(new Preset.StaticPreset(presetNames[i], getPersistedPresetLevels(i)));
+                mEqPresets.add(
+                        new Preset.StaticPreset(presetNames[i], getPersistedPresetLevels(i)));
             }
         } else {
             mPredefinedPresets = 1; // custom is predefined
@@ -237,7 +241,8 @@ public class EqualizerManager {
     public int copyToCustom() {
         updateGlobalLevels(mCurrentPreset);
         if (DEBUG) {
-            Log.w(TAG, "using levels from preset: " + mCurrentPreset + ": " + Arrays.toString(mGlobalLevels));
+            Log.w(TAG, "using levels from preset: " + mCurrentPreset + ": " + Arrays.toString(
+                    mGlobalLevels));
         }
 
         String levels = EqUtils.floatLevelsToString(
@@ -245,9 +250,12 @@ public class EqualizerManager {
                         mEqPresets.get(mCurrentPreset).getLevels()));
         setGlobalPref("custom", levels);
 
-        ((Preset.PermCustomPreset) mEqPresets.get(mEQCustomPresetPosition)).setLevels(mGlobalLevels);
-        if (DEBUG)
-            Log.i(TAG, "copyToCustom() wrote current preset levels to index: " + mEQCustomPresetPosition);
+        ((Preset.PermCustomPreset) mEqPresets.get(mEQCustomPresetPosition)).setLevels(
+                mGlobalLevels);
+        if (DEBUG) {
+            Log.i(TAG, "copyToCustom() wrote current preset levels to index: "
+                    + mEQCustomPresetPosition);
+        }
         setPreset(mEQCustomPresetPosition);
         savePresetsDelayed();
         return mEQCustomPresetPosition;
@@ -256,20 +264,24 @@ public class EqualizerManager {
     public int addPresetFromCustom() {
         updateGlobalLevels(mEQCustomPresetPosition);
         if (DEBUG) {
-            Log.w(TAG, "using levels from preset: " + mCurrentPreset + ": " + Arrays.toString(mGlobalLevels));
+            Log.w(TAG, "using levels from preset: " + mCurrentPreset + ": " + Arrays.toString(
+                    mGlobalLevels));
         }
 
         int writtenToIndex = addPreset(mGlobalLevels);
-        if (DEBUG)
-            Log.i(TAG, "addPresetFromCustom() wrote current preset levels to index: " + writtenToIndex);
+        if (DEBUG) {
+            Log.i(TAG, "addPresetFromCustom() wrote current preset levels to index: "
+                    + writtenToIndex);
+        }
         setPreset(writtenToIndex);
         savePresetsDelayed();
         return writtenToIndex;
     }
 
     /**
-     * Loops through all presets. And finds the first preset that can be written to.
-     * If one is not found, then one is inserted, and that new index is returned.
+     * Loops through all presets. And finds the first preset that can be written to. If one is not
+     * found, then one is inserted, and that new index is returned.
+     *
      * @return the index that the levels were copied to
      */
     private int addPreset(float[] levels) {
@@ -370,7 +382,8 @@ public class EqualizerManager {
 
     private void updateEqControls() {
         final boolean userPreset = isUserPreset();
-        mConfig.getCallbacks().notifyEqControlStateChanged(mEQCustomPresetPosition == mCurrentPreset,
+        mConfig.getCallbacks().notifyEqControlStateChanged(
+                mEQCustomPresetPosition == mCurrentPreset,
                 userPreset, userPreset, userPreset);
     }
 
diff --git a/src/org/lineageos/audiofx/activity/MasterConfigControl.java b/src/org/lineageos/audiofx/activity/MasterConfigControl.java
index 90ce1a1..aa9efe2 100644
--- a/src/org/lineageos/audiofx/activity/MasterConfigControl.java
+++ b/src/org/lineageos/audiofx/activity/MasterConfigControl.java
@@ -50,13 +50,13 @@ import java.util.List;
 
 /**
  * Master configuration class for AudioFX.
- *
- * Contains the main hub where data is stored for the current eq graph (which there should be
- * one of, thus only once instance of this class exists).
- *
+ * <p>
+ * Contains the main hub where data is stored for the current eq graph (which there should be one
+ * of, thus only once instance of this class exists).
+ * <p>
  * Anyone can obtain an instance of this class. If one does not exist, a new one is created.
- * Immediately before the new instance creation happens, some defaults are pre-populated
- * with MasterConfigControl.saveDefaults(). That method doesn't ever have to be directly called.
+ * Immediately before the new instance creation happens, some defaults are pre-populated with
+ * MasterConfigControl.saveDefaults(). That method doesn't ever have to be directly called.
  */
 public class MasterConfigControl {
 
@@ -107,7 +107,10 @@ public class MasterConfigControl {
             mServiceConnection = new ServiceConnection() {
                 @Override
                 public void onServiceConnected(ComponentName name, IBinder binder) {
-                    if (SERVICE_DEBUG) Log.i(TAG, "onServiceConnected refCount=" + mServiceRefCount);
+                    if (SERVICE_DEBUG) {
+                        Log.i(TAG,
+                                "onServiceConnected refCount=" + mServiceRefCount);
+                    }
                     mService = ((AudioFxService.LocalBinder) binder);
                     LocalBroadcastManager.getInstance(mContext).registerReceiver(
                             mDeviceChangeReceiver,
@@ -116,7 +119,10 @@ public class MasterConfigControl {
 
                 @Override
                 public void onServiceDisconnected(ComponentName name) {
-                    if (SERVICE_DEBUG) Log.w(TAG, "onServiceDisconnected refCount =" + mServiceRefCount);
+                    if (SERVICE_DEBUG) {
+                        Log.w(TAG,
+                                "onServiceDisconnected refCount =" + mServiceRefCount);
+                    }
                     LocalBroadcastManager.getInstance(mContext).unregisterReceiver(
                             mDeviceChangeReceiver);
                     mService = null;
@@ -124,7 +130,7 @@ public class MasterConfigControl {
             };
 
             Intent serviceIntent = new Intent(mContext, AudioFxService.class);
-            conn =  mContext.bindService(serviceIntent, mServiceConnection,
+            conn = mContext.bindService(serviceIntent, mServiceConnection,
                     Context.BIND_AUTO_CREATE);
         }
         if (conn) {
@@ -147,7 +153,7 @@ public class MasterConfigControl {
 
     public boolean checkService() {
         if (mService == null && mServiceRefCount == 0 && mShouldBindToService) {
-            Log.e(TAG,  "Service went away, rebinding");
+            Log.e(TAG, "Service went away, rebinding");
             bindService();
         }
         return mService != null;
@@ -317,7 +323,8 @@ public class MasterConfigControl {
     }
 
     public void setReverbEnabled(boolean enable) {
-        getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_REVERB_PRESET, enable ? "1" : "0").apply();
+        getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_REVERB_PRESET,
+                enable ? "1" : "0").apply();
         updateService(AudioFxService.REVERB_CHANGED);
     }
 
@@ -327,7 +334,7 @@ public class MasterConfigControl {
         }
     }
 
-    public static String getDeviceDisplayString(Context context,  AudioDeviceInfo info) {
+    public static String getDeviceDisplayString(Context context, AudioDeviceInfo info) {
         int type = info == null ? -1 : info.getType();
         switch (type) {
             case TYPE_WIRED_HEADSET:
@@ -391,6 +398,7 @@ public class MasterConfigControl {
 
     /**
      * Set whether to automatically attempt to bind to the service.
+     *
      * @param bindToService
      */
     public void setAutoBindToService(boolean bindToService) {
diff --git a/src/org/lineageos/audiofx/activity/StateCallbacks.java b/src/org/lineageos/audiofx/activity/StateCallbacks.java
index e01b34f..d082732 100644
--- a/src/org/lineageos/audiofx/activity/StateCallbacks.java
+++ b/src/org/lineageos/audiofx/activity/StateCallbacks.java
@@ -28,37 +28,37 @@ public class StateCallbacks {
 
     private final List<EqUpdatedCallback> mEqUpdateCallbacks = new ArrayList<EqUpdatedCallback>();
 
-    private final List<DeviceChangedCallback> mDeviceChangedCallbacks = new ArrayList<DeviceChangedCallback>();
+    private final List<DeviceChangedCallback> mDeviceChangedCallbacks =
+            new ArrayList<DeviceChangedCallback>();
 
-    private final List<EqControlStateCallback> mEqControlStateCallbacks = new ArrayList<EqControlStateCallback>();
+    private final List<EqControlStateCallback> mEqControlStateCallbacks =
+            new ArrayList<EqControlStateCallback>();
 
     StateCallbacks(MasterConfigControl config) {
         mConfig = config;
     }
 
     /**
-     * Implement this callback to receive any changes called to the
-     * MasterConfigControl instance
+     * Implement this callback to receive any changes called to the MasterConfigControl instance
      */
     public interface EqUpdatedCallback {
         /**
          * A band level has been changed
          *
-         * @param band the band index which changed
-         * @param dB the new decibel value
-         * @param fromSystem whether the event was from the system or from the
-         *            user
+         * @param band       the band index which changed
+         * @param dB         the new decibel value
+         * @param fromSystem whether the event was from the system or from the user
          */
-        public void onBandLevelChange(int band, float dB, boolean fromSystem);
+        void onBandLevelChange(int band, float dB, boolean fromSystem);
 
         /**
          * The preset has been set
          *
          * @param newPresetIndex the new preset index.
          */
-        public void onPresetChanged(int newPresetIndex);
+        void onPresetChanged(int newPresetIndex);
 
-        public void onPresetsChanged();
+        void onPresetsChanged();
     }
 
     public void addEqUpdatedCallback(EqUpdatedCallback callback) {
@@ -101,7 +101,7 @@ public class StateCallbacks {
      * Callback for changes to visibility and state of the EQ
      */
     public interface EqControlStateCallback {
-        public void updateEqState(boolean saveVisible, boolean removeVisible,
+        void updateEqState(boolean saveVisible, boolean removeVisible,
                 boolean renameVisible, boolean unlockVisible);
     }
 
@@ -127,12 +127,12 @@ public class StateCallbacks {
     }
 
     /**
-     * Register this callback to receive notification when the output device
-     * changes.
+     * Register this callback to receive notification when the output device changes.
      */
     public interface DeviceChangedCallback {
-        public void onDeviceChanged(AudioDeviceInfo device, boolean userChange);
-        public void onGlobalDeviceToggle(boolean on);
+        void onDeviceChanged(AudioDeviceInfo device, boolean userChange);
+
+        void onGlobalDeviceToggle(boolean on);
 
     }
 
diff --git a/src/org/lineageos/audiofx/backends/EffectSet.java b/src/org/lineageos/audiofx/backends/EffectSet.java
index 8a01b0d..893b9a8 100644
--- a/src/org/lineageos/audiofx/backends/EffectSet.java
+++ b/src/org/lineageos/audiofx/backends/EffectSet.java
@@ -19,8 +19,7 @@ import android.media.AudioDeviceInfo;
 import android.util.Log;
 
 /**
- * Helper class representing the full complement of effects attached to one
- * audio session.
+ * Helper class representing the full complement of effects attached to one audio session.
  */
 public abstract class EffectSet {
 
@@ -47,32 +46,33 @@ public abstract class EffectSet {
     }
 
     /**
-     * Called to do subclass-first initialization in case
-     * an implementation has ordering restrictions.
-     *
-     * This call is wrapped in a try/catch - if an exception is thrown here,
-     * a release will immediately be called.
+     * Called to do subclass-first initialization in case an implementation has ordering
+     * restrictions.
+     * <p>
+     * This call is wrapped in a try/catch - if an exception is thrown here, a release will
+     * immediately be called.
      */
-    protected void onCreate() { }
+    protected void onCreate() {
+    }
 
     /**
      * Destroy all effects in this set.
-     *
-     * Attempting to use this object after calling release is
-     * undefined behavior.
+     * <p>
+     * Attempting to use this object after calling release is undefined behavior.
      */
-    public void release() { }
+    public void release() {
+    }
 
     /**
      * Returns the enumerated brand of this implementation
+     *
      * @return brandId
      */
     public abstract int getBrand();
 
     /**
-     * Called when the user toggles the engine on or off. If the
-     * implementation has a built-in bypass mode, this is where
-     * to use it.
+     * Called when the user toggles the engine on or off. If the implementation has a built-in
+     * bypass mode, this is where to use it.
      *
      * @param globalEnabled
      */
@@ -85,8 +85,7 @@ public abstract class EffectSet {
     }
 
     /**
-     * Called when the output device has changed. All cached
-     * data should be cleared at this point.
+     * Called when the output device has changed. All cached data should be cleared at this point.
      *
      * @param deviceInfo
      */
@@ -96,6 +95,7 @@ public abstract class EffectSet {
 
     /**
      * Return the current active output device
+     *
      * @return deviceInfo
      */
     public AudioDeviceInfo getDevice() {
@@ -103,31 +103,32 @@ public abstract class EffectSet {
     }
 
     /**
-     * Begin bulk-update of parameters. This can be used if the
-     * implementation supports operation in a transactional/atomic
-     * manner. Parameter changes will immediately follow this call
-     * and should be committed to the backend when the subsequent
-     * commitUpdate() is called.
-     *
+     * Begin bulk-update of parameters. This can be used if the implementation supports operation in
+     * a transactional/atomic manner. Parameter changes will immediately follow this call and should
+     * be committed to the backend when the subsequent commitUpdate() is called.
+     * <p>
      * Optional.
      *
      * @return status - false on failure
      */
-    public boolean beginUpdate() { return true; }
+    public boolean beginUpdate() {
+        return true;
+    }
 
     /**
      * Commit accumulated updates to the backend. See above.
-     *
-     * begin/commit are used when a large number of parameters need
-     * to be sent to the backend, such as in the case of a device
-     * switch or preset change. This can increase performance and
-     * reduce click/pop issues.
-     *
+     * <p>
+     * begin/commit are used when a large number of parameters need to be sent to the backend, such
+     * as in the case of a device switch or preset change. This can increase performance and reduce
+     * click/pop issues.
+     * <p>
      * Optional.
      *
      * @return status - false on failure
      */
-    public boolean commitUpdate() { return true; }
+    public boolean commitUpdate() {
+        return true;
+    }
 
     /* ---- Top level effects begin here ---- */
 
@@ -221,10 +222,8 @@ public abstract class EffectSet {
     }
 
     /**
-     * How long should we delay for when releasing the effects?
-     * This helps certain effect implementations when the
-     * app is reusing a session ID. By default this
-     * behavior is disabled.
+     * How long should we delay for when releasing the effects? This helps certain effect
+     * implementations when the app is reusing a session ID. By default this behavior is disabled.
      */
     public int getReleaseDelay() {
         return 0;
diff --git a/src/org/lineageos/audiofx/backends/EffectSetWithAndroidEq.java b/src/org/lineageos/audiofx/backends/EffectSetWithAndroidEq.java
index 27eea4a..b756d89 100644
--- a/src/org/lineageos/audiofx/backends/EffectSetWithAndroidEq.java
+++ b/src/org/lineageos/audiofx/backends/EffectSetWithAndroidEq.java
@@ -84,7 +84,7 @@ public abstract class EffectSetWithAndroidEq extends EffectSet {
 
     @Override
     public void setEqualizerBandLevel(short band, float level) {
-        setBandLevelSafe(band, (short)level);
+        setBandLevelSafe(band, (short) level);
     }
 
     @Override
diff --git a/src/org/lineageos/audiofx/backends/EffectsFactory.java b/src/org/lineageos/audiofx/backends/EffectsFactory.java
index cd9ca9c..e9e0320 100644
--- a/src/org/lineageos/audiofx/backends/EffectsFactory.java
+++ b/src/org/lineageos/audiofx/backends/EffectsFactory.java
@@ -1,10 +1,10 @@
 package org.lineageos.audiofx.backends;
 
-import org.lineageos.audiofx.Constants;
-
 import android.content.Context;
 import android.media.AudioDeviceInfo;
 
+import org.lineageos.audiofx.Constants;
+
 /**
  * Creates an EffectSet appropriate for the current device
  */
diff --git a/src/org/lineageos/audiofx/backends/IEffectFactory.java b/src/org/lineageos/audiofx/backends/IEffectFactory.java
index 937478a..0f1399f 100644
--- a/src/org/lineageos/audiofx/backends/IEffectFactory.java
+++ b/src/org/lineageos/audiofx/backends/IEffectFactory.java
@@ -22,8 +22,9 @@ interface IEffectFactory {
 
     /**
      * Create a new EffectSet based on current stream parameters.
-     * @param context context to create the effect with
-     * @param sessionId session id to attach the effect to
+     *
+     * @param context       context to create the effect with
+     * @param sessionId     session id to attach the effect to
      * @param currentDevice current device that the effect should initially setup for
      * @return an {@link EffectSet}
      */
diff --git a/src/org/lineageos/audiofx/eq/EqBarView.java b/src/org/lineageos/audiofx/eq/EqBarView.java
index 19a2f55..38c8db0 100644
--- a/src/org/lineageos/audiofx/eq/EqBarView.java
+++ b/src/org/lineageos/audiofx/eq/EqBarView.java
@@ -117,8 +117,9 @@ public class EqBarView extends FrameLayout implements StateCallbacks.EqUpdatedCa
         mUserInteracting = true;
 
         if (DEBUG) Log.d(TAG, "initial level: " + mInitialLevel);
-        mInitialLevel = (1 - (mPosY / mParentHeight)) * (mEqManager.getMinDB() - mEqManager.getMaxDB())
-                - mEqManager.getMinDB();
+        mInitialLevel =
+                (1 - (mPosY / mParentHeight)) * (mEqManager.getMinDB() - mEqManager.getMaxDB())
+                        - mEqManager.getMinDB();
 
         updateWidth((int) (mNormalWidth * 2));
     }
diff --git a/src/org/lineageos/audiofx/eq/EqContainerView.java b/src/org/lineageos/audiofx/eq/EqContainerView.java
index 5a692d5..0a6ef95 100644
--- a/src/org/lineageos/audiofx/eq/EqContainerView.java
+++ b/src/org/lineageos/audiofx/eq/EqContainerView.java
@@ -83,7 +83,7 @@ public class EqContainerView extends FrameLayout
 
     private Handler mHandler;
 
-    private Runnable mVibrateRunnable = new Runnable() {
+    private final Runnable mVibrateRunnable = new Runnable() {
         @Override
         public void run() {
             Vibrator v = (Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE);
@@ -194,11 +194,11 @@ public class EqContainerView extends FrameLayout
 
         getViewTreeObserver().addOnGlobalLayoutListener(
                 new ViewTreeObserver.OnGlobalLayoutListener() {
-            @Override
-            public void onGlobalLayout() {
-                generateAndAddBars();
-            }
-        });
+                    @Override
+                    public void onGlobalLayout() {
+                        generateAndAddBars();
+                    }
+                });
     }
 
     @Override
@@ -210,14 +210,14 @@ public class EqContainerView extends FrameLayout
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        mControls = (ViewGroup) findViewById(R.id.eq_controls);
+        mControls = findViewById(R.id.eq_controls);
 
-        mLockBox = (CheckBox) findViewById(R.id.lock);
+        mLockBox = findViewById(R.id.lock);
         mLockBox.setOnCheckedChangeListener(mEqManager.getLockChangeListener());
 
-        mRenameControl = (ImageView) findViewById(R.id.rename);
-        mRemoveControl = (ImageView) findViewById(R.id.remove);
-        mSaveControl = (ImageView) findViewById(R.id.save);
+        mRenameControl = findViewById(R.id.rename);
+        mRemoveControl = findViewById(R.id.remove);
+        mSaveControl = findViewById(R.id.save);
     }
 
     @Override
@@ -352,8 +352,9 @@ public class EqContainerView extends FrameLayout
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         //---------------------------------------------------
 
-        if (mFirstLayout)
+        if (mFirstLayout) {
             return;
+        }
 
         int dashY = bottom - mPaddingBottom - (mHeight / 2);
 
@@ -434,7 +435,7 @@ public class EqContainerView extends FrameLayout
     private void updateSelectedBands() {
         for (int i = 0; i < mEqManager.getNumBands(); i++) {
             EqBandInfo tag = mBandInfo.get(i);
-            final EqBarView bar = (EqBarView) findViewWithTag(tag);
+            final EqBarView bar = findViewWithTag(tag);
             if (bar != null) {
                 final ViewPropertyAnimator barAnimation = bar.animate().withLayer();
                 if (mSelectedBands.isEmpty()) {
diff --git a/src/org/lineageos/audiofx/eq/EqSwipeController.java b/src/org/lineageos/audiofx/eq/EqSwipeController.java
index ec6cae1..08641ca 100644
--- a/src/org/lineageos/audiofx/eq/EqSwipeController.java
+++ b/src/org/lineageos/audiofx/eq/EqSwipeController.java
@@ -16,7 +16,6 @@
 package org.lineageos.audiofx.eq;
 
 import android.content.Context;
-import android.provider.Settings;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.VelocityTracker;
@@ -58,9 +57,9 @@ public class EqSwipeController extends LinearLayout {
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
-        mEq = (EqContainerView) findViewById(R.id.eq_container);
+        mEq = findViewById(R.id.eq_container);
         mPager = (InfiniteViewPager) findViewById(R.id.pager);
-        mControls = (ViewGroup) findViewById(R.id.eq_controls);
+        mControls = findViewById(R.id.eq_controls);
     }
 
     @Override
@@ -69,12 +68,8 @@ public class EqSwipeController extends LinearLayout {
         float y = event.getY();
 
         // don't intercept touches over the EQ controls
-        if (mControls.getRight() > x && mControls.getTop() < y
-                && mControls.getBottom() > y && mControls.getLeft() < x) {
-            return false;
-        }
-
-        return true;
+        return !(mControls.getRight() > x) || !(mControls.getTop() < y)
+                || !(mControls.getBottom() > y) || !(mControls.getLeft() < x);
     }
 
     @Override
diff --git a/src/org/lineageos/audiofx/fragment/AudioFxBaseFragment.java b/src/org/lineageos/audiofx/fragment/AudioFxBaseFragment.java
index 1bf84f4..459c1b0 100644
--- a/src/org/lineageos/audiofx/fragment/AudioFxBaseFragment.java
+++ b/src/org/lineageos/audiofx/fragment/AudioFxBaseFragment.java
@@ -18,8 +18,7 @@ package org.lineageos.audiofx.fragment;
 import android.animation.Animator;
 import android.app.Fragment;
 import android.os.Bundle;
-import android.widget.CompoundButton;
-import org.lineageos.audiofx.activity.ActivityMusic;
+
 import org.lineageos.audiofx.activity.MasterConfigControl;
 
 public class AudioFxBaseFragment extends Fragment {
@@ -46,15 +45,15 @@ public class AudioFxBaseFragment extends Fragment {
     }
 
     public void animateBackgroundColorTo(Integer colorTo, Animator.AnimatorListener listener,
-                                         AudioFxFragment.ColorUpdateListener updateListener) {
+            AudioFxFragment.ColorUpdateListener updateListener) {
         if (mFrag != null) {
             mFrag.animateBackgroundColorTo(colorTo, listener, updateListener);
         }
     }
 
     /**
-     * Call to change the color and propogate it up to the activity, which will call
-     * {@link #updateFragmentBackgroundColors(int)}
+     * Call to change the color and propogate it up to the activity, which will call {@link
+     * #updateFragmentBackgroundColors(int)}
      *
      * @param color
      */
diff --git a/src/org/lineageos/audiofx/fragment/AudioFxFragment.java b/src/org/lineageos/audiofx/fragment/AudioFxFragment.java
index 12b3e4c..349f5a9 100644
--- a/src/org/lineageos/audiofx/fragment/AudioFxFragment.java
+++ b/src/org/lineageos/audiofx/fragment/AudioFxFragment.java
@@ -38,6 +38,7 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CompoundButton;
+
 import org.lineageos.audiofx.Compatibility;
 import org.lineageos.audiofx.Constants;
 import org.lineageos.audiofx.R;
@@ -83,7 +84,8 @@ public class AudioFxFragment extends Fragment implements StateCallbacks.DeviceCh
     private AudioDeviceInfo mSystemDevice;
     private AudioDeviceInfo mUserSelection;
 
-    private final Map<MenuItem, AudioDeviceInfo> mMenuItems = new ArrayMap<MenuItem, AudioDeviceInfo>();
+    private final Map<MenuItem, AudioDeviceInfo> mMenuItems =
+            new ArrayMap<MenuItem, AudioDeviceInfo>();
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -165,7 +167,7 @@ public class AudioFxFragment extends Fragment implements StateCallbacks.DeviceCh
         mCurrentBackgroundColor = !mConfig.isCurrentDeviceEnabled()
                 ? mDisabledColor
                 : mEqManager.getAssociatedPresetColorHex(
-                mEqManager.getCurrentPresetIndex());
+                        mEqManager.getCurrentPresetIndex());
         updateBackgroundColors(mCurrentBackgroundColor, false);
 
         promptIfNotDefault();
@@ -416,7 +418,7 @@ public class AudioFxFragment extends Fragment implements StateCallbacks.DeviceCh
     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mInterceptLayout = (InterceptableLinearLayout) view.findViewById(R.id.interceptable_layout);
+        mInterceptLayout = view.findViewById(R.id.interceptable_layout);
     }
 
     public void animateBackgroundColorTo(int colorTo, Animator.AnimatorListener listener,
@@ -482,7 +484,7 @@ public class AudioFxFragment extends Fragment implements StateCallbacks.DeviceCh
         animateBackgroundColorTo(colorTo, animatorListener, null);
     }
 
-    private ValueAnimator.AnimatorUpdateListener mColorUpdateListener
+    private final ValueAnimator.AnimatorUpdateListener mColorUpdateListener
             = new ValueAnimator.AnimatorUpdateListener() {
         @Override
         public void onAnimationUpdate(ValueAnimator animation) {
diff --git a/src/org/lineageos/audiofx/fragment/ControlsFragment.java b/src/org/lineageos/audiofx/fragment/ControlsFragment.java
index 22c7ac7..ded7b16 100644
--- a/src/org/lineageos/audiofx/fragment/ControlsFragment.java
+++ b/src/org/lineageos/audiofx/fragment/ControlsFragment.java
@@ -43,7 +43,7 @@ public class ControlsFragment extends AudioFxBaseFragment {
     Switch mMaxxVolumeSwitch;
     Switch mReverbSwitch;
 
-    private CompoundButton.OnCheckedChangeListener mMaxxVolumeListener
+    private final CompoundButton.OnCheckedChangeListener mMaxxVolumeListener
             = new CompoundButton.OnCheckedChangeListener() {
         @Override
         public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
@@ -53,7 +53,7 @@ public class ControlsFragment extends AudioFxBaseFragment {
         }
     };
 
-    private CompoundButton.OnCheckedChangeListener mReverbListener
+    private final CompoundButton.OnCheckedChangeListener mReverbListener
             = new CompoundButton.OnCheckedChangeListener() {
         @Override
         public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
@@ -72,14 +72,16 @@ public class ControlsFragment extends AudioFxBaseFragment {
 
     @Override
     public void onPause() {
-        MasterConfigControl.getInstance(getActivity()).getCallbacks().removeDeviceChangedCallback(mKnobContainer);
+        MasterConfigControl.getInstance(getActivity()).getCallbacks().removeDeviceChangedCallback(
+                mKnobContainer);
         super.onPause();
     }
 
     @Override
     public void onResume() {
         super.onResume();
-        MasterConfigControl.getInstance(getActivity()).getCallbacks().addDeviceChangedCallback(mKnobContainer);
+        MasterConfigControl.getInstance(getActivity()).getCallbacks().addDeviceChangedCallback(
+                mKnobContainer);
     }
 
     @Override
@@ -117,28 +119,28 @@ public class ControlsFragment extends AudioFxBaseFragment {
 
     private void updateSwitchColor(Switch view, int color) {
         ColorStateList thumbStates = new ColorStateList(
-                new int[][] {
-                    new int[] { -android.R.attr.state_enabled },
-                    new int[] { android.R.attr.state_checked },
-                    new int[] {}
+                new int[][]{
+                        new int[]{-android.R.attr.state_enabled},
+                        new int[]{android.R.attr.state_checked},
+                        new int[]{}
                 },
-                new int[] {
-                    color,
-                    color,
-                    Color.LTGRAY
+                new int[]{
+                        color,
+                        color,
+                        Color.LTGRAY
                 }
         );
 
         ColorStateList trackStates = new ColorStateList(
-                new int[][] {
-                    new int[] { -android.R.attr.state_enabled },
-                    new int[] { android.R.attr.state_checked },
-                    new int[] {}
+                new int[][]{
+                        new int[]{-android.R.attr.state_enabled},
+                        new int[]{android.R.attr.state_checked},
+                        new int[]{}
                 },
-                new int[] {
-                    color,
-                    color,
-                    Color.GRAY
+                new int[]{
+                        color,
+                        color,
+                        Color.GRAY
                 }
         );
 
@@ -150,7 +152,7 @@ public class ControlsFragment extends AudioFxBaseFragment {
 
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
-                             Bundle savedInstanceState) {
+            Bundle savedInstanceState) {
         View root = inflater.inflate(mConfig.hasMaxxAudio() ? R.layout.controls_maxx_audio
                 : R.layout.controls_generic, container, false);
         return root;
@@ -160,9 +162,9 @@ public class ControlsFragment extends AudioFxBaseFragment {
     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mKnobContainer = (KnobContainer) view.findViewById(R.id.knob_container);
-        mMaxxVolumeSwitch = (Switch) view.findViewById(R.id.maxx_volume_switch);
-        mReverbSwitch = (Switch) view.findViewById(R.id.reverb_switch);
+        mKnobContainer = view.findViewById(R.id.knob_container);
+        mMaxxVolumeSwitch = view.findViewById(R.id.maxx_volume_switch);
+        mReverbSwitch = view.findViewById(R.id.reverb_switch);
 
         updateFragmentBackgroundColors(getCurrentBackgroundColor());
 
diff --git a/src/org/lineageos/audiofx/fragment/EqualizerFragment.java b/src/org/lineageos/audiofx/fragment/EqualizerFragment.java
index cb97a8b..bd600b5 100644
--- a/src/org/lineageos/audiofx/fragment/EqualizerFragment.java
+++ b/src/org/lineageos/audiofx/fragment/EqualizerFragment.java
@@ -22,7 +22,6 @@ import android.annotation.Nullable;
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.content.DialogInterface;
-import android.graphics.drawable.ColorDrawable;
 import android.media.AudioDeviceInfo;
 import android.os.Bundle;
 import android.os.Handler;
@@ -179,9 +178,9 @@ public class EqualizerFragment extends AudioFxBaseFragment
         renameDialog.setNegativeButton(android.R.string.cancel,
                 new DialogInterface.OnClickListener() {
 
-            public void onClick(DialogInterface d, int which) {
-            }
-        });
+                    public void onClick(DialogInterface d, int which) {
+                    }
+                });
 
         // disable ok button if text is empty
         final AlertDialog dialog = renameDialog.create();
@@ -196,11 +195,7 @@ public class EqualizerFragment extends AudioFxBaseFragment
 
             @Override
             public void afterTextChanged(Editable s) {
-                if (s.length() == 0) {
-                    dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(false);
-                } else {
-                    dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(true);
-                }
+                dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(s.length() != 0);
             }
         });
 
@@ -209,7 +204,7 @@ public class EqualizerFragment extends AudioFxBaseFragment
 
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
-                             Bundle savedInstanceState) {
+            Bundle savedInstanceState) {
         View root = inflater.inflate(R.layout.equalizer, container, false);
         return root;
     }
@@ -218,13 +213,14 @@ public class EqualizerFragment extends AudioFxBaseFragment
     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mSelectedPositionBands = mEqManager.getPersistedPresetLevels(mEqManager.getCurrentPresetIndex());
+        mSelectedPositionBands = mEqManager.getPersistedPresetLevels(
+                mEqManager.getCurrentPresetIndex());
         mSelectedPosition = mEqManager.getCurrentPresetIndex();
 
-        mEqContainer = (EqContainerView) view.findViewById(R.id.eq_container);
+        mEqContainer = view.findViewById(R.id.eq_container);
         mPresetPager = (InfiniteViewPager) view.findViewById(R.id.pager);
-        mPresetPageIndicator  = (CirclePageIndicator) view.findViewById(R.id.indicator);
-        mFakePager = (ViewPager) view.findViewById(R.id.fake_pager);
+        mPresetPageIndicator = view.findViewById(R.id.indicator);
+        mFakePager = view.findViewById(R.id.fake_pager);
 
         mEqContainer.findViewById(R.id.save).setOnClickListener(
                 new View.OnClickListener() {
@@ -359,7 +355,8 @@ public class EqualizerFragment extends AudioFxBaseFragment
         if (DEBUG) Log.d(TAG, "mCurrentRealPage After: " + newPage);
 
         mSelectedPositionBands = mEqManager.getPresetLevels(mSelectedPosition);
-        final float[] targetBandLevels = mEqManager.getPresetLevels(mEqManager.getCurrentPresetIndex());
+        final float[] targetBandLevels = mEqManager.getPresetLevels(
+                mEqManager.getCurrentPresetIndex());
 
         // do background transition manually as viewpager can't handle this bg change
         final Integer colorTo = !mConfig.isCurrentDeviceEnabled()
@@ -410,7 +407,8 @@ public class EqualizerFragment extends AudioFxBaseFragment
                     float delta = targetBandLevels[i] - mSelectedPositionBands[i];
                     float newBandLevel = mSelectedPositionBands[i]
                             + (delta * animator.getAnimatedFraction());
-                    //if (DEBUG_VIEWPAGER) Log.d(TAG, i + ", delta: " + delta + ", newBandLevel: " + newBandLevel);
+                    //if (DEBUG_VIEWPAGER) Log.d(TAG, i + ", delta: " + delta + ", newBandLevel:
+                    // " + newBandLevel);
                     mEqManager.setLevel(i, newBandLevel, true);
                 }
             }
@@ -427,143 +425,160 @@ public class EqualizerFragment extends AudioFxBaseFragment
     }
 
 
-    private ViewPager.OnPageChangeListener mViewPageChangeListener = new ViewPager.OnPageChangeListener() {
-
-        int mState;
-        float mLastOffset;
-        boolean mJustGotToCustomAndSettling;
+    private final ViewPager.OnPageChangeListener mViewPageChangeListener =
+            new ViewPager.OnPageChangeListener() {
 
-        @Override
-        public void onPageScrolled(int newPosition, float positionOffset, int positionOffsetPixels) {
-            if (DEBUG_VIEWPAGER)
-                Log.i(TAG, "onPageScrolled(" + newPosition + ", " + positionOffset + ", "
-                        + positionOffsetPixels + ")");
-            Integer colorFrom;
-            Integer colorTo;
+                int mState;
+                float mLastOffset;
+                boolean mJustGotToCustomAndSettling;
 
-            if (newPosition == mAnimatingToRealPageTarget && mEqManager.isAnimatingToCustom()) {
-                if (DEBUG_VIEWPAGER) Log.w(TAG, "settling var set to true");
-                mJustGotToCustomAndSettling = true;
-                mAnimatingToRealPageTarget = -1;
-            }
+                @Override
+                public void onPageScrolled(int newPosition, float positionOffset,
+                        int positionOffsetPixels) {
+                    if (DEBUG_VIEWPAGER) {
+                        Log.i(TAG, "onPageScrolled(" + newPosition + ", " + positionOffset + ", "
+                                + positionOffsetPixels + ")");
+                    }
+                    Integer colorFrom;
+                    Integer colorTo;
+
+                    if (newPosition == mAnimatingToRealPageTarget
+                            && mEqManager.isAnimatingToCustom()) {
+                        if (DEBUG_VIEWPAGER) Log.w(TAG, "settling var set to true");
+                        mJustGotToCustomAndSettling = true;
+                        mAnimatingToRealPageTarget = -1;
+                    }
 
-            newPosition = newPosition % mDataAdapter.getCount();
+                    newPosition = newPosition % mDataAdapter.getCount();
 
 
-            if (mEqManager.isAnimatingToCustom() || mDeviceChanging) {
-                if (DEBUG_VIEWPAGER)
-                    Log.i(TAG, "ignoring onPageScrolled because animating to custom or device is changing");
-                return;
-            }
+                    if (mEqManager.isAnimatingToCustom() || mDeviceChanging) {
+                        if (DEBUG_VIEWPAGER) {
+                            Log.i(TAG,
+                                    "ignoring onPageScrolled because animating to custom or "
+                                            + "device is changing");
+                        }
+                        return;
+                    }
 
-            int toPos;
-            if (mLastOffset - positionOffset > 0.8) { // this is needed for flings
-                //Log.e(TAG, "OFFSET DIFF > 0.8! Setting selected position from: " + mSelectedPosition + " to " + newPosition);
-                mSelectedPosition = newPosition;
-                // mSelectedPositionBands will be reset by setPreset() below calling back to onPresetChanged()
+                    int toPos;
+                    if (mLastOffset - positionOffset > 0.8) { // this is needed for flings
+                        //Log.e(TAG, "OFFSET DIFF > 0.8! Setting selected position from: " +
+                        // mSelectedPosition + " to " + newPosition);
+                        mSelectedPosition = newPosition;
+                        // mSelectedPositionBands will be reset by setPreset() below calling back
+                        // to onPresetChanged()
 
-                mEqManager.setPreset(mSelectedPosition);
-            }
+                        mEqManager.setPreset(mSelectedPosition);
+                    }
 
-            if (newPosition < mSelectedPosition || (newPosition == mDataAdapter.getCount() - 1)
-                    && mSelectedPosition == 0) {
-                // scrolling left <<<<<
-                positionOffset = (1 - positionOffset);
-                //Log.v(TAG, "<<<<<< positionOffset: " + positionOffset + " (last offset: " + mLastOffset + ")");
-                toPos = newPosition;
-                colorTo = mEqManager.getAssociatedPresetColorHex(toPos);
-            } else {
-                // scrolling right >>>>>
-                //Log.v(TAG, ">>>>>>> positionOffset: " + positionOffset + " (last offset: " + mLastOffset + ")");
-                toPos = newPosition + 1 % mDataAdapter.getCount();
-                if (toPos >= mDataAdapter.getCount()) {
-                    toPos = 0;
-                }
+                    if (newPosition < mSelectedPosition
+                            || (newPosition == mDataAdapter.getCount() - 1)
+                            && mSelectedPosition == 0) {
+                        // scrolling left <<<<<
+                        positionOffset = (1 - positionOffset);
+                        //Log.v(TAG, "<<<<<< positionOffset: " + positionOffset + " (last offset:
+                        // " + mLastOffset + ")");
+                        toPos = newPosition;
+                        colorTo = mEqManager.getAssociatedPresetColorHex(toPos);
+                    } else {
+                        // scrolling right >>>>>
+                        //Log.v(TAG, ">>>>>>> positionOffset: " + positionOffset + " (last
+                        // offset: " + mLastOffset + ")");
+                        toPos = newPosition + 1 % mDataAdapter.getCount();
+                        if (toPos >= mDataAdapter.getCount()) {
+                            toPos = 0;
+                        }
 
-                colorTo = mEqManager.getAssociatedPresetColorHex(toPos);
-            }
+                        colorTo = mEqManager.getAssociatedPresetColorHex(toPos);
+                    }
 
-            if (!mDeviceChanging && mConfig.isCurrentDeviceEnabled()) {
-                colorFrom = mEqManager.getAssociatedPresetColorHex(mSelectedPosition);
-                setBackgroundColor((Integer) mArgbEval.evaluate(positionOffset, colorFrom, colorTo),
-                        true);
-            }
+                    if (!mDeviceChanging && mConfig.isCurrentDeviceEnabled()) {
+                        colorFrom = mEqManager.getAssociatedPresetColorHex(mSelectedPosition);
+                        setBackgroundColor(
+                                (Integer) mArgbEval.evaluate(positionOffset, colorFrom, colorTo),
+                                true);
+                    }
 
-            if (mSelectedPositionBands == null) {
-                mSelectedPositionBands = mEqManager.getPresetLevels(mSelectedPosition);
-            }
-            // get current bands
-            float[] finalPresetLevels = mEqManager.getPresetLevels(toPos);
-
-            final int N = mEqManager.getNumBands();
-            for (int i = 0; i < N; i++) { // animate bands
-                float delta = finalPresetLevels[i] - mSelectedPositionBands[i];
-                float newBandLevel = mSelectedPositionBands[i] + (delta * positionOffset);
-                //if (DEBUG_VIEWPAGER) Log.d(TAG, i + ", delta: " + delta + ", newBandLevel: " + newBandLevel);
-                mEqManager.setLevel(i, newBandLevel, true);
-            }
-            mLastOffset = positionOffset;
+                    if (mSelectedPositionBands == null) {
+                        mSelectedPositionBands = mEqManager.getPresetLevels(mSelectedPosition);
+                    }
+                    // get current bands
+                    float[] finalPresetLevels = mEqManager.getPresetLevels(toPos);
+
+                    final int N = mEqManager.getNumBands();
+                    for (int i = 0; i < N; i++) { // animate bands
+                        float delta = finalPresetLevels[i] - mSelectedPositionBands[i];
+                        float newBandLevel = mSelectedPositionBands[i] + (delta * positionOffset);
+                        //if (DEBUG_VIEWPAGER) Log.d(TAG, i + ", delta: " + delta + ",
+                        // newBandLevel: " + newBandLevel);
+                        mEqManager.setLevel(i, newBandLevel, true);
+                    }
+                    mLastOffset = positionOffset;
 
-        }
+                }
 
-        @Override
-        public void onPageSelected(int position) {
-            if (DEBUG_VIEWPAGER) Log.i(TAG, "onPageSelected(" + position + ")");
-            mCurrentRealPage = position;
-            position = position % mDataAdapter.getCount();
-            if (DEBUG_VIEWPAGER) Log.e(TAG, "onPageSelected(" + position + ")");
-            mFakePager.setCurrentItem(position);
-            mSelectedPosition = position;
-            if (!mDeviceChanging) {
-                mSelectedPositionBands = mEqManager.getPresetLevels(mSelectedPosition);
-            }
-        }
+                @Override
+                public void onPageSelected(int position) {
+                    if (DEBUG_VIEWPAGER) Log.i(TAG, "onPageSelected(" + position + ")");
+                    mCurrentRealPage = position;
+                    position = position % mDataAdapter.getCount();
+                    if (DEBUG_VIEWPAGER) Log.e(TAG, "onPageSelected(" + position + ")");
+                    mFakePager.setCurrentItem(position);
+                    mSelectedPosition = position;
+                    if (!mDeviceChanging) {
+                        mSelectedPositionBands = mEqManager.getPresetLevels(mSelectedPosition);
+                    }
+                }
 
 
-        @Override
-        public void onPageScrollStateChanged(int newState) {
-            mState = newState;
-            if (mDeviceChanging) { // avoid setting unwanted presets during custom animations
-                return;
-            }
-            if (DEBUG_VIEWPAGER)
-                Log.w(TAG, "onPageScrollStateChanged(" + stateToString(newState) + ")");
+                @Override
+                public void onPageScrollStateChanged(int newState) {
+                    mState = newState;
+                    if (mDeviceChanging) { // avoid setting unwanted presets during custom
+                        // animations
+                        return;
+                    }
+                    if (DEBUG_VIEWPAGER) {
+                        Log.w(TAG, "onPageScrollStateChanged(" + stateToString(newState) + ")");
+                    }
 
-            if (mJustGotToCustomAndSettling && mState == ViewPager.SCROLL_STATE_IDLE) {
-                if (DEBUG_VIEWPAGER)
-                    Log.w(TAG, "onPageScrollChanged() setting animating to custom = false");
-                mJustGotToCustomAndSettling = false;
-                mEqManager.setChangingPresets(false);
-                mEqManager.setAnimatingToCustom(false);
-            } else {
-                if (mState == ViewPager.SCROLL_STATE_IDLE) {
-                    animateBackgroundColorTo(!mConfig.isCurrentDeviceEnabled()
-                                    ? getDisabledColor()
-                                    : mEqManager.getAssociatedPresetColorHex(mSelectedPosition),
-                            null, null);
-
-                    mEqManager.setChangingPresets(false);
-                    mEqManager.setPreset(mSelectedPosition);
-
-                } else {
-                    // not idle
-                    mEqManager.setChangingPresets(true);
+                    if (mJustGotToCustomAndSettling && mState == ViewPager.SCROLL_STATE_IDLE) {
+                        if (DEBUG_VIEWPAGER) {
+                            Log.w(TAG, "onPageScrollChanged() setting animating to custom = false");
+                        }
+                        mJustGotToCustomAndSettling = false;
+                        mEqManager.setChangingPresets(false);
+                        mEqManager.setAnimatingToCustom(false);
+                    } else {
+                        if (mState == ViewPager.SCROLL_STATE_IDLE) {
+                            animateBackgroundColorTo(!mConfig.isCurrentDeviceEnabled()
+                                            ? getDisabledColor()
+                                            : mEqManager.getAssociatedPresetColorHex(mSelectedPosition),
+                                    null, null);
+
+                            mEqManager.setChangingPresets(false);
+                            mEqManager.setPreset(mSelectedPosition);
+
+                        } else {
+                            // not idle
+                            mEqManager.setChangingPresets(true);
+                        }
+                    }
                 }
-            }
-        }
 
-        private String stateToString(int state) {
-            switch (state) {
-                case 0:
-                    return "STATE_IDLE";
-                case 1:
-                    return "STATE_DRAGGING";
-                case 2:
-                    return "STATE_SETTLING";
-                default:
-                    return "STATE_WUT";
-            }
-        }
+                private String stateToString(int state) {
+                    switch (state) {
+                        case 0:
+                            return "STATE_IDLE";
+                        case 1:
+                            return "STATE_DRAGGING";
+                        case 2:
+                            return "STATE_SETTLING";
+                        default:
+                            return "STATE_WUT";
+                    }
+                }
 
-    };
+            };
 }
diff --git a/src/org/lineageos/audiofx/knobs/KnobCommander.java b/src/org/lineageos/audiofx/knobs/KnobCommander.java
index a02b90e..7179bdb 100644
--- a/src/org/lineageos/audiofx/knobs/KnobCommander.java
+++ b/src/org/lineageos/audiofx/knobs/KnobCommander.java
@@ -16,6 +16,7 @@
 package org.lineageos.audiofx.knobs;
 
 import android.content.Context;
+
 import org.lineageos.audiofx.Constants;
 import org.lineageos.audiofx.activity.MasterConfigControl;
 import org.lineageos.audiofx.service.AudioFxService;
@@ -28,8 +29,8 @@ public class KnobCommander {
 
     private static KnobCommander sInstance;
 
-    private Context mContext;
-    private MasterConfigControl mConfig;
+    private final Context mContext;
+    private final MasterConfigControl mConfig;
 
     private KnobCommander(Context context) {
         mContext = context;
@@ -45,10 +46,14 @@ public class KnobCommander {
 
     public RadialKnob.OnKnobChangeListener getRadialKnobCallback(int whichKnob) {
         switch (whichKnob) {
-            case KNOB_TREBLE: return mTrebleKnobCallback;
-            case KNOB_BASS: return mBassKnobCallback;
-            case KNOB_VIRTUALIZER: return mVirtualizerCallback;
-            default: return null;
+            case KNOB_TREBLE:
+                return mTrebleKnobCallback;
+            case KNOB_BASS:
+                return mBassKnobCallback;
+            case KNOB_VIRTUALIZER:
+                return mVirtualizerCallback;
+            default:
+                return null;
         }
     }
 
@@ -101,15 +106,19 @@ public class KnobCommander {
     }
 
     public int getVirtualizerStrength() {
-        return Integer.valueOf(mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_VIRTUALIZER_STRENGTH, "0")) / 10;
+        return Integer.valueOf(
+                mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_VIRTUALIZER_STRENGTH, "0"))
+                / 10;
     }
 
     public int getBassStrength() {
-        return Integer.valueOf(mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_BASS_STRENGTH, "0")) / 10;
+        return Integer.valueOf(
+                mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_BASS_STRENGTH, "0")) / 10;
     }
 
     public int getTrebleStrength() {
-        return Integer.valueOf(mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_TREBLE_STRENGTH, "0"));
+        return Integer.valueOf(
+                mConfig.getPrefs().getString(Constants.DEVICE_AUDIOFX_TREBLE_STRENGTH, "0"));
     }
 
     public void setTrebleEnabled(boolean on) {
@@ -119,7 +128,8 @@ public class KnobCommander {
 
     public void setTrebleStrength(int value) {
         // set parameter and state
-        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_TREBLE_STRENGTH, String.valueOf(value)).apply();
+        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_TREBLE_STRENGTH,
+                String.valueOf(value)).apply();
         mConfig.updateService(AudioFxService.TREBLE_BOOST_CHANGED);
     }
 
@@ -130,63 +140,69 @@ public class KnobCommander {
 
     public void setBassStrength(int value) {
         // set parameter and state
-        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_BASS_STRENGTH, String.valueOf(value * 10)).apply();
+        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_BASS_STRENGTH,
+                String.valueOf(value * 10)).apply();
         mConfig.updateService(AudioFxService.BASS_BOOST_CHANGED);
     }
 
     public void setVirtualizerEnabled(boolean on) {
-        mConfig.getPrefs().edit().putBoolean(Constants.DEVICE_AUDIOFX_VIRTUALIZER_ENABLE, on).apply();
+        mConfig.getPrefs().edit().putBoolean(Constants.DEVICE_AUDIOFX_VIRTUALIZER_ENABLE,
+                on).apply();
         mConfig.updateService(AudioFxService.VIRTUALIZER_CHANGED);
     }
 
     public void setVirtualiserStrength(int value) {
         // set parameter and state
-        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_VIRTUALIZER_STRENGTH, String.valueOf(value * 10)).apply();
+        mConfig.getPrefs().edit().putString(Constants.DEVICE_AUDIOFX_VIRTUALIZER_STRENGTH,
+                String.valueOf(value * 10)).apply();
         mConfig.updateService(AudioFxService.VIRTUALIZER_CHANGED);
     }
 
-    private RadialKnob.OnKnobChangeListener mTrebleKnobCallback = new RadialKnob.OnKnobChangeListener() {
-        @Override
-        public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
-            if (fromUser) {
-                setTrebleStrength(value);
-            }
-        }
-
-        @Override
-        public boolean onSwitchChanged(RadialKnob knob, boolean on) {
-            setTrebleEnabled(on);
-            return true;
-        }
-    };
-
-    private RadialKnob.OnKnobChangeListener mBassKnobCallback = new RadialKnob.OnKnobChangeListener() {
-        @Override
-        public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
-            if (fromUser) {
-                setBassStrength(value);
-            }
-        }
-
-        @Override
-        public boolean onSwitchChanged(RadialKnob knob, boolean on) {
-            setBassEnabled(on);
-            return true;
-        }
-    };
-
-    private RadialKnob.OnKnobChangeListener mVirtualizerCallback = new RadialKnob.OnKnobChangeListener() {
-        @Override
-        public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
-            if (fromUser) {
-                setVirtualiserStrength(value);
-            }
-        }
-
-        @Override
-        public boolean onSwitchChanged(RadialKnob knob, boolean on) {
-            setVirtualizerEnabled(on);
-            return true;
-        }
-    };
+    private final RadialKnob.OnKnobChangeListener mTrebleKnobCallback =
+            new RadialKnob.OnKnobChangeListener() {
+                @Override
+                public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
+                    if (fromUser) {
+                        setTrebleStrength(value);
+                    }
+                }
+
+                @Override
+                public boolean onSwitchChanged(RadialKnob knob, boolean on) {
+                    setTrebleEnabled(on);
+                    return true;
+                }
+            };
+
+    private final RadialKnob.OnKnobChangeListener mBassKnobCallback =
+            new RadialKnob.OnKnobChangeListener() {
+                @Override
+                public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
+                    if (fromUser) {
+                        setBassStrength(value);
+                    }
+                }
+
+                @Override
+                public boolean onSwitchChanged(RadialKnob knob, boolean on) {
+                    setBassEnabled(on);
+                    return true;
+                }
+            };
+
+    private final RadialKnob.OnKnobChangeListener mVirtualizerCallback =
+            new RadialKnob.OnKnobChangeListener() {
+                @Override
+                public void onValueChanged(RadialKnob knob, int value, boolean fromUser) {
+                    if (fromUser) {
+                        setVirtualiserStrength(value);
+                    }
+                }
+
+                @Override
+                public boolean onSwitchChanged(RadialKnob knob, boolean on) {
+                    setVirtualizerEnabled(on);
+                    return true;
+                }
+            };
 }
diff --git a/src/org/lineageos/audiofx/knobs/KnobContainer.java b/src/org/lineageos/audiofx/knobs/KnobContainer.java
index 669949f..e629f76 100644
--- a/src/org/lineageos/audiofx/knobs/KnobContainer.java
+++ b/src/org/lineageos/audiofx/knobs/KnobContainer.java
@@ -127,13 +127,13 @@ public class KnobContainer extends LinearLayout
         };
 
         if (MasterConfigControl.getInstance(getContext()).hasMaxxAudio()) {
-            mVirtualizerContainer = (ViewGroup) findViewById(R.id.virtualizer_knob_container);
-            mBassContainer = (ViewGroup) findViewById(R.id.bass_knob_container);
-            mTrebleContainer = (ViewGroup) findViewById(R.id.treble_knob_container);
+            mVirtualizerContainer = findViewById(R.id.virtualizer_knob_container);
+            mBassContainer = findViewById(R.id.bass_knob_container);
+            mTrebleContainer = findViewById(R.id.treble_knob_container);
         }
 
         if (mTrebleContainer != null) {
-            mTrebleKnob = (RadialKnob) mTrebleContainer.findViewById(R.id.knob);
+            mTrebleKnob = mTrebleContainer.findViewById(R.id.knob);
             mTrebleKnob.setTag(new KnobInfo(KnobCommander.KNOB_TREBLE, mTrebleKnob,
                     mTrebleContainer.findViewById(R.id.label)));
             mTrebleKnob.setOnTouchListener(knobTouchListener);
@@ -145,8 +145,9 @@ public class KnobContainer extends LinearLayout
             mTrebleKnob.setMax(100);
         }
         if (mBassContainer != null) {
-            mBassKnob = (RadialKnob) mBassContainer.findViewById(R.id.knob);
-            mBassKnob.setTag(new KnobInfo(KnobCommander.KNOB_BASS, mBassKnob, mBassContainer.findViewById(R.id.label)));
+            mBassKnob = mBassContainer.findViewById(R.id.knob);
+            mBassKnob.setTag(new KnobInfo(KnobCommander.KNOB_BASS, mBassKnob,
+                    mBassContainer.findViewById(R.id.label)));
             mBassKnob.setOnTouchListener(knobTouchListener);
             mBassKnob.setOnKnobChangeListener(
                     KnobCommander.getInstance(getContext()).getRadialKnobCallback(
@@ -158,7 +159,7 @@ public class KnobContainer extends LinearLayout
 
         }
         if (mVirtualizerContainer != null) {
-            mVirtualizerKnob = (RadialKnob) mVirtualizerContainer.findViewById(R.id.knob);
+            mVirtualizerKnob = mVirtualizerContainer.findViewById(R.id.knob);
             mVirtualizerKnob.setTag(new KnobInfo(KnobCommander.KNOB_VIRTUALIZER, mVirtualizerKnob,
                     mVirtualizerContainer.findViewById(R.id.label)));
             mVirtualizerKnob.setOnTouchListener(knobTouchListener);
@@ -179,7 +180,7 @@ public class KnobContainer extends LinearLayout
     private ViewGroup addKnob(int whichKnob) {
         ViewGroup knobContainer = (ViewGroup) LayoutInflater.from(mContext)
                 .inflate(R.layout.generic_knob_control, this, false);
-        TextView label = (TextView) knobContainer.findViewById(R.id.label);
+        TextView label = knobContainer.findViewById(R.id.label);
 
         int newContainerId = 0;
         int knobLabelRes = 0;
diff --git a/src/org/lineageos/audiofx/knobs/RadialKnob.java b/src/org/lineageos/audiofx/knobs/RadialKnob.java
index 56062c3..7d15b64 100644
--- a/src/org/lineageos/audiofx/knobs/RadialKnob.java
+++ b/src/org/lineageos/audiofx/knobs/RadialKnob.java
@@ -47,7 +47,7 @@ import android.util.TypedValue;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.animation.AccelerateInterpolator;
-import android.widget.Toast;
+
 import org.lineageos.audiofx.R;
 
 public class RadialKnob extends View {
@@ -81,16 +81,18 @@ public class RadialKnob extends View {
     private float mLastY;
     private boolean mMoved;
     private int mWidth = 0;
-    private RectF mRectF, mOuterRect = new RectF(), mInnerRect = new RectF();
+    private RectF mRectF;
+    private final RectF mOuterRect = new RectF();
+    private final RectF mInnerRect = new RectF();
     private float mLastAngle;
     private Long mLastVibrateTime;
     private int mHighlightColor;
-    private int mBackgroundArcColor;
-    private int mBackgroundArcColorDisabled;
-    private int mRectPadding;
-    private int mStrokeWidth;
-    private float mHandleWidth; // little square indicator where user touches
-    private float mTextOffset;
+    private final int mBackgroundArcColor;
+    private final int mBackgroundArcColorDisabled;
+    private final int mRectPadding;
+    private final int mStrokeWidth;
+    private final float mHandleWidth; // little square indicator where user touches
+    private final float mTextOffset;
 
     Path mPath = new Path();
     PathMeasure mPathMeasure = new PathMeasure();
@@ -322,8 +324,10 @@ public class RadialKnob extends View {
                 float progress = (Float) animation.getAnimatedValue();
                 mProgress = progress;
                 mLastAngle = mProgress * MAX_DEGREES;
-                if (DEBUG) Log.i(TAG, "onAnimationUpdate(): mProgress: "
-                        + mProgress + ", mLastAngle: " + mLastAngle);
+                if (DEBUG) {
+                    Log.i(TAG, "onAnimationUpdate(): mProgress: "
+                            + mProgress + ", mLastAngle: " + mLastAngle);
+                }
 
                 setProgress(mProgress);
                 if (mOnKnobChangeListener != null) {
@@ -365,8 +369,9 @@ public class RadialKnob extends View {
 
                 final boolean inDeadzone = inCircle(x, y, center, center, radius);
                 final boolean inOuterCircle = inCircle(x, y, center, center, radius + 70);
-                if (DEBUG)
+                if (DEBUG) {
                     Log.d(TAG, "inOuterCircle: " + inOuterCircle + ", inDeadzone: " + inDeadzone);
+                }
                 final float delta = getDelta(x, y);
                 final float angle = angleWithOffset(x, y, DEGREE_OFFSET);
 
@@ -408,9 +413,10 @@ public class RadialKnob extends View {
                         } else if (angle > 90) {
                             mOffProgress = 0;
                         }
-                        if (DEBUG)
+                        if (DEBUG) {
                             Log.d(TAG, "OFF, touching angle: " + angle +
                                     ", mOffProgress: " + mOffProgress + ", delta " + delta);
+                        }
                         // we want at least 1%, how many degrees = 1%? + a little padding
                         final float onePercentInDegrees = (MAX_DEGREES / 100) + 1f;
                         if (mOffProgress > 15 && angle < MAX_DEGREES
@@ -537,15 +543,11 @@ public class RadialKnob extends View {
 
 
     private static boolean inCircle(float x, float y, float circleCenterX, float circleCenterY,
-                                    float circleRadius) {
+            float circleRadius) {
         double dx = Math.pow(x - circleCenterX, 2);
         double dy = Math.pow(y - circleCenterY, 2);
 
-        if ((dx + dy) < Math.pow(circleRadius, 2)) {
-            return true;
-        } else {
-            return false;
-        }
+        return (dx + dy) < Math.pow(circleRadius, 2);
     }
 
     @Override
diff --git a/src/org/lineageos/audiofx/preset/InfinitePagerAdapter.java b/src/org/lineageos/audiofx/preset/InfinitePagerAdapter.java
index eaabd02..a363233 100644
--- a/src/org/lineageos/audiofx/preset/InfinitePagerAdapter.java
+++ b/src/org/lineageos/audiofx/preset/InfinitePagerAdapter.java
@@ -30,7 +30,7 @@ public class InfinitePagerAdapter extends PagerAdapter {
     private static final String TAG = "InfinitePagerAdapter";
     private static final boolean DEBUG = false;
 
-    private PagerAdapter adapter;
+    private final PagerAdapter adapter;
 
     public InfinitePagerAdapter(PagerAdapter adapter) {
         this.adapter = adapter;
@@ -108,4 +108,4 @@ public class InfinitePagerAdapter extends PagerAdapter {
             Log.d(TAG, message);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/org/lineageos/audiofx/preset/InfiniteViewPager.java b/src/org/lineageos/audiofx/preset/InfiniteViewPager.java
index c51ed27..b083ac4 100644
--- a/src/org/lineageos/audiofx/preset/InfiniteViewPager.java
+++ b/src/org/lineageos/audiofx/preset/InfiniteViewPager.java
@@ -27,8 +27,8 @@ import org.lineageos.audiofx.activity.EqualizerManager;
 import org.lineageos.audiofx.activity.MasterConfigControl;
 
 /**
- * A {@link ViewPager} that allows pseudo-infinite paging with a wrap-around effect. Should be used with an {@link
- * InfinitePagerAdapter}.
+ * A {@link ViewPager} that allows pseudo-infinite paging with a wrap-around effect. Should be used
+ * with an {@link InfinitePagerAdapter}.
  */
 public class InfiniteViewPager extends ViewPager {
 
diff --git a/src/org/lineageos/audiofx/preset/PresetPagerAdapter.java b/src/org/lineageos/audiofx/preset/PresetPagerAdapter.java
index f7ad6f5..ee9167a 100644
--- a/src/org/lineageos/audiofx/preset/PresetPagerAdapter.java
+++ b/src/org/lineageos/audiofx/preset/PresetPagerAdapter.java
@@ -79,5 +79,4 @@ public class PresetPagerAdapter extends PagerAdapter {
     }
 
 
-
 }
diff --git a/src/org/lineageos/audiofx/receiver/ServiceDispatcher.java b/src/org/lineageos/audiofx/receiver/ServiceDispatcher.java
index cfd2bd4..9e9a35b 100644
--- a/src/org/lineageos/audiofx/receiver/ServiceDispatcher.java
+++ b/src/org/lineageos/audiofx/receiver/ServiceDispatcher.java
@@ -45,7 +45,7 @@ public class ServiceDispatcher extends BroadcastReceiver {
         } else if (action.equals(LineageAudioManager.ACTION_AUDIO_SESSIONS_CHANGED)) {
 
             // callback from LineageAudioService
-            final AudioSessionInfo info = (AudioSessionInfo) intent.getParcelableExtra(
+            final AudioSessionInfo info = intent.getParcelableExtra(
                     LineageAudioManager.EXTRA_SESSION_INFO);
             boolean added = intent.getBooleanExtra(LineageAudioManager.EXTRA_SESSION_ADDED, false);
             service.putExtra(LineageAudioManager.EXTRA_SESSION_INFO, info);
diff --git a/src/org/lineageos/audiofx/service/AudioFxService.java b/src/org/lineageos/audiofx/service/AudioFxService.java
index a9e71ea..3368e8f 100644
--- a/src/org/lineageos/audiofx/service/AudioFxService.java
+++ b/src/org/lineageos/audiofx/service/AudioFxService.java
@@ -17,7 +17,6 @@ package org.lineageos.audiofx.service;
 
 import android.app.Service;
 import android.content.Intent;
-import android.content.res.Configuration;
 import android.media.AudioDeviceInfo;
 import android.media.AudioManager;
 import android.media.audiofx.AudioEffect;
@@ -29,22 +28,19 @@ import android.util.Log;
 
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
-import org.lineageos.audiofx.R;
-import org.lineageos.audiofx.activity.MasterConfigControl;
 import org.lineageos.audiofx.backends.EffectSet;
 
 import java.lang.ref.WeakReference;
-import java.util.Locale;
 
 import lineageos.media.AudioSessionInfo;
 import lineageos.media.LineageAudioManager;
 
 /**
  * This service is responsible for applying all requested effects from the AudioFX UI.
- *
- * Since the AudioFX UI allows for different configurations based on the current output device,
- * the service is also responsible for applying the effects properly based on user configuration,
- * and the current device output state.
+ * <p>
+ * Since the AudioFX UI allows for different configurations based on the current output device, the
+ * service is also responsible for applying the effects properly based on user configuration, and
+ * the current device output state.
  */
 public class AudioFxService extends Service
         implements AudioOutputChangeListener.AudioOutputChangedCallback {
@@ -59,13 +55,13 @@ public class AudioFxService extends Service
     public static final String EXTRA_DEVICE = "device";
 
     // flags for updateService to minimize DSP traffic
-    public static final int EQ_CHANGED              = 0x1;
-    public static final int BASS_BOOST_CHANGED      = 0x2;
-    public static final int VIRTUALIZER_CHANGED     = 0x4;
-    public static final int TREBLE_BOOST_CHANGED    = 0x8;
-    public static final int VOLUME_BOOST_CHANGED    = 0x10;
-    public static final int REVERB_CHANGED          = 0x20;
-    public static final int ALL_CHANGED             = 0xFF;
+    public static final int EQ_CHANGED = 0x1;
+    public static final int BASS_BOOST_CHANGED = 0x2;
+    public static final int VIRTUALIZER_CHANGED = 0x4;
+    public static final int TREBLE_BOOST_CHANGED = 0x8;
+    public static final int VOLUME_BOOST_CHANGED = 0x10;
+    public static final int REVERB_CHANGED = 0x20;
+    public static final int ALL_CHANGED = 0xFF;
 
     // flags from audio.h, used by session callbacks
     static final int AUDIO_OUTPUT_FLAG_FAST = 0x4;
@@ -173,7 +169,7 @@ public class AudioFxService extends Service
 
             } else if (action.equals(LineageAudioManager.ACTION_AUDIO_SESSIONS_CHANGED)) {
 
-                final AudioSessionInfo info = (AudioSessionInfo) intent.getParcelableExtra(
+                final AudioSessionInfo info = intent.getParcelableExtra(
                         LineageAudioManager.EXTRA_SESSION_INFO);
                 if (info != null && info.getSessionId() > 0) {
                     boolean added = intent.getBooleanExtra(
@@ -215,8 +211,9 @@ public class AudioFxService extends Service
 
         mCurrentDevice = outputDevice;
 
-        if (DEBUG)
+        if (DEBUG) {
             Log.d(TAG, "Broadcasting device changed event");
+        }
 
         // Update the UI with the change
         Intent intent = new Intent(ACTION_DEVICE_OUTPUT_CHANGED);
diff --git a/src/org/lineageos/audiofx/service/AudioOutputChangeListener.java b/src/org/lineageos/audiofx/service/AudioOutputChangeListener.java
index c205907..abf0a00 100644
--- a/src/org/lineageos/audiofx/service/AudioOutputChangeListener.java
+++ b/src/org/lineageos/audiofx/service/AudioOutputChangeListener.java
@@ -39,10 +39,11 @@ public class AudioOutputChangeListener extends AudioDeviceCallback {
     private final Handler mHandler;
     private int mLastDevice = -1;
 
-    private final ArrayList<AudioOutputChangedCallback> mCallbacks = new ArrayList<AudioOutputChangedCallback>();
+    private final ArrayList<AudioOutputChangedCallback> mCallbacks =
+            new ArrayList<AudioOutputChangedCallback>();
 
     public interface AudioOutputChangedCallback {
-        public void onAudioOutputChanged(boolean firstChange, AudioDeviceInfo outputDevice);
+        void onAudioOutputChanged(boolean firstChange, AudioDeviceInfo outputDevice);
     }
 
     public AudioOutputChangeListener(Context context, Handler handler) {
@@ -72,7 +73,7 @@ public class AudioOutputChangeListener extends AudioDeviceCallback {
 
     private void callback() {
         synchronized (mCallbacks) {
-        final AudioDeviceInfo device = getCurrentDevice();
+            final AudioDeviceInfo device = getCurrentDevice();
 
             if (device == null) {
                 Log.w(TAG, "Unable to determine audio device!");
@@ -84,7 +85,7 @@ public class AudioOutputChangeListener extends AudioDeviceCallback {
                         " type: " + device.getType() +
                         " name: " + device.getProductName() +
                         " address: " + device.getAddress() +
-                        " [" + device.toString() + "]");
+                        " [" + device + "]");
                 mLastDevice = device.getId();
                 mHandler.post(new Runnable() {
                     @Override
@@ -135,7 +136,7 @@ public class AudioOutputChangeListener extends AudioDeviceCallback {
     }
 
     public AudioDeviceInfo getDeviceById(int id) {
-        for (AudioDeviceInfo ai :  mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
+        for (AudioDeviceInfo ai : mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
             if (ai.getId() == id) {
                 return ai;
             }
diff --git a/src/org/lineageos/audiofx/service/DevicePreferenceManager.java b/src/org/lineageos/audiofx/service/DevicePreferenceManager.java
index 173e46e..7c1e7b8 100644
--- a/src/org/lineageos/audiofx/service/DevicePreferenceManager.java
+++ b/src/org/lineageos/audiofx/service/DevicePreferenceManager.java
@@ -113,8 +113,8 @@ public class DevicePreferenceManager
     /**
      * This method sets some sane defaults for presets, device defaults, etc
      * <p/>
-     * First we read presets from the system, then adjusts some setting values
-     * for some better defaults!
+     * First we read presets from the system, then adjusts some setting values for some better
+     * defaults!
      */
     private void saveAndApplyDefaults(boolean overridePrevious) {
         if (DEBUG) {
@@ -189,7 +189,8 @@ public class DevicePreferenceManager
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_VIRTUALIZER, temp.hasVirtualizer());
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_REVERB, temp.hasReverb());
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_BASSBOOST, temp.hasBassBoost());
-        editor.putBoolean(AUDIOFX_GLOBAL_HAS_MAXXAUDIO, temp.getBrand() == Constants.EFFECT_TYPE_MAXXAUDIO);
+        editor.putBoolean(AUDIOFX_GLOBAL_HAS_MAXXAUDIO,
+                temp.getBrand() == Constants.EFFECT_TYPE_MAXXAUDIO);
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_DTS, temp.getBrand() == Constants.EFFECT_TYPE_DTS);
         editor.commit();
         temp.release();
@@ -199,7 +200,7 @@ public class DevicePreferenceManager
         prefs
                 .edit()
                 .putInt(Constants.AUDIOFX_GLOBAL_PREFS_VERSION_INT,
-                            CURRENT_PREFS_INT_VERSION)
+                        CURRENT_PREFS_INT_VERSION)
                 .putBoolean(Constants.SAVED_DEFAULTS, true)
                 .commit();
     }
@@ -214,8 +215,8 @@ public class DevicePreferenceManager
     }
 
     /**
-     * This method sets up some *persisted* defaults.
-     * Prereq: saveDefaults() must have been run before this can apply its defaults properly.
+     * This method sets up some *persisted* defaults. Prereq: saveDefaults() must have been run
+     * before this can apply its defaults properly.
      */
     private void applyDefaults(boolean overridePrevious) {
         if (DEBUG) {
@@ -300,9 +301,9 @@ public class DevicePreferenceManager
         int idx = findInList(smallSpeakers, presetNames);
         if (idx >= 0) {
             speakerPrefs.edit()
-                .putBoolean(DEVICE_AUDIOFX_GLOBAL_ENABLE, true)
-                .putString(DEVICE_AUDIOFX_EQ_PRESET, String.valueOf(idx))
-                .commit();
+                    .putBoolean(DEVICE_AUDIOFX_GLOBAL_ENABLE, true)
+                    .putString(DEVICE_AUDIOFX_EQ_PRESET, String.valueOf(idx))
+                    .commit();
         }
     }
 
diff --git a/src/org/lineageos/audiofx/service/SessionManager.java b/src/org/lineageos/audiofx/service/SessionManager.java
index 203de37..e1a1c68 100644
--- a/src/org/lineageos/audiofx/service/SessionManager.java
+++ b/src/org/lineageos/audiofx/service/SessionManager.java
@@ -111,14 +111,13 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
     }
 
     /**
-     * Callback which listens for session updates from AudioPolicyManager. This is a
-     * feature added by LineageOS which notifies when sessions are created or
-     * destroyed on a particular stream. This is independent of the standard control
-     * intents and should not conflict with them. This feature may not be available on
-     * all devices.
-     *
-     * Default logic is to do our best to only attach to music streams. We don't attach
-     * to mono streams by default since these are usually notifications/ringtones/etc.
+     * Callback which listens for session updates from AudioPolicyManager. This is a feature added
+     * by LineageOS which notifies when sessions are created or destroyed on a particular stream.
+     * This is independent of the standard control intents and should not conflict with them. This
+     * feature may not be available on all devices.
+     * <p>
+     * Default logic is to do our best to only attach to music streams. We don't attach to mono
+     * streams by default since these are usually notifications/ringtones/etc.
      */
     public boolean shouldHandleSession(AudioSessionInfo info) {
         final boolean music = info.getStream() == AudioManager.STREAM_MUSIC;
@@ -131,7 +130,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
         synchronized (mAudioSessionsL) {
             // Never auto-attach is someone is recording! We don't want to interfere
             // with any sort of loopback mechanisms.
-            final boolean recording = AudioSystem.isSourceActive(0) || AudioSystem.isSourceActive(6);
+            final boolean recording = AudioSystem.isSourceActive(0) || AudioSystem.isSourceActive(
+                    6);
             if (recording) {
                 Log.w(TAG, "Recording in progress, not performing auto-attach!");
                 return;
@@ -180,7 +180,7 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
 
     /**
      * Update the backend with our changed preferences.
-     *
+     * <p>
      * This must only be called from the HandlerThread!
      */
     private void updateBackendLocked(int flags, EffectSet session) {
@@ -191,7 +191,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
         final SharedPreferences prefs = mDevicePrefs.getCurrentDevicePrefs();
 
         if (DEBUG) {
-            Log.i(TAG, "+++ updateBackend() called with flags=[" + flags + "], session=[" + session + "]");
+            Log.i(TAG, "+++ updateBackend() called with flags=[" + flags + "], session=[" + session
+                    + "]");
         }
 
         if (session == null) {
@@ -220,7 +221,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
                     session.enableEqualizer(true);
                     String savedPreset = prefs.getString(DEVICE_AUDIOFX_EQ_PRESET_LEVELS, null);
                     if (savedPreset != null) {
-                        session.setEqualizerLevelsDecibels(EqUtils.stringBandsToFloats(savedPreset));
+                        session.setEqualizerLevelsDecibels(
+                                EqUtils.stringBandsToFloats(savedPreset));
                     }
                 }
             } catch (Exception e) {
@@ -279,7 +281,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
             try {
                 if ((flags & VOLUME_BOOST_CHANGED) > 0 && session.hasVolumeBoost()) {
                     // maxx volume
-                    session.enableVolumeBoost(prefs.getBoolean(DEVICE_AUDIOFX_MAXXVOLUME_ENABLE, false));
+                    session.enableVolumeBoost(
+                            prefs.getBoolean(DEVICE_AUDIOFX_MAXXVOLUME_ENABLE, false));
                 }
             } catch (Exception e) {
                 Log.e(TAG, "Error enabling volume boost!", e);
@@ -291,7 +294,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
             }
         }
         if (DEBUG) {
-            Log.i(TAG, "--- updateBackend() called with flags=[" + flags + "], session=[" + session + "]");
+            Log.i(TAG, "--- updateBackend() called with flags=[" + flags + "], session=[" + session
+                    + "]");
         }
     }
 
@@ -320,7 +324,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
                                 session = new EffectsFactory()
                                         .createEffectSet(mContext, sessionId, mCurrentDevice);
                             } catch (Exception e) {
-                                Log.e(TAG, "couldn't create effects for session id: " + sessionId, e);
+                                Log.e(TAG, "couldn't create effects for session id: " + sessionId,
+                                        e);
                                 break;
                             }
                             mAudioSessionsL.put(sessionId, session);
@@ -362,7 +367,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
                         final int N = mAudioSessionsL.size();
                         for (int i = 0; i < N; i++) {
                             sessionId = mAudioSessionsL.keyAt(i);
-                            mHandler.obtainMessage(MSG_UPDATE_FOR_SESSION, flags, 0, sessionId).sendToTarget();
+                            mHandler.obtainMessage(MSG_UPDATE_FOR_SESSION, flags, 0,
+                                    sessionId).sendToTarget();
                         }
                         break;
 
@@ -380,8 +386,10 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
                         }
 
                         String device = getCurrentDeviceIdentifier();
-                        if (DEBUG) Log.i(TAG, "updating DSP for sessionId=" + sessionId +
-                                ", device=" + device + " flags=" + flags);
+                        if (DEBUG) {
+                            Log.i(TAG, "updating DSP for sessionId=" + sessionId +
+                                    ", device=" + device + " flags=" + flags);
+                        }
 
                         session = mAudioSessionsL.get(sessionId);
                         if (session != null) {
diff --git a/src/org/lineageos/audiofx/viewpagerindicator/CirclePageIndicator.java b/src/org/lineageos/audiofx/viewpagerindicator/CirclePageIndicator.java
index 9d53d95..872e16e 100644
--- a/src/org/lineageos/audiofx/viewpagerindicator/CirclePageIndicator.java
+++ b/src/org/lineageos/audiofx/viewpagerindicator/CirclePageIndicator.java
@@ -16,6 +16,10 @@
  */
 package org.lineageos.audiofx.viewpagerindicator;
 
+import static android.graphics.Paint.ANTI_ALIAS_FLAG;
+import static android.widget.LinearLayout.HORIZONTAL;
+import static android.widget.LinearLayout.VERTICAL;
+
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -34,13 +38,9 @@ import androidx.viewpager.widget.ViewPager;
 
 import org.lineageos.audiofx.R;
 
-import static android.graphics.Paint.ANTI_ALIAS_FLAG;
-import static android.widget.LinearLayout.HORIZONTAL;
-import static android.widget.LinearLayout.VERTICAL;
-
 /**
- * Draws circles (one for each view). The current view position is filled and
- * others are only stroked.
+ * Draws circles (one for each view). The current view position is filled and others are only
+ * stroked.
  */
 public class CirclePageIndicator extends View implements PageIndicator {
     private static final int INVALID_POINTER = -1;
@@ -81,25 +81,33 @@ public class CirclePageIndicator extends View implements PageIndicator {
         final Resources res = getResources();
         final int defaultPageColor = res.getColor(R.color.default_circle_indicator_page_color);
         final int defaultFillColor = res.getColor(R.color.default_circle_indicator_fill_color);
-        final int defaultOrientation = res.getInteger(R.integer.default_circle_indicator_orientation);
+        final int defaultOrientation = res.getInteger(
+                R.integer.default_circle_indicator_orientation);
         final int defaultStrokeColor = res.getColor(R.color.default_circle_indicator_stroke_color);
-        final float defaultStrokeWidth = res.getDimension(R.dimen.default_circle_indicator_stroke_width);
+        final float defaultStrokeWidth = res.getDimension(
+                R.dimen.default_circle_indicator_stroke_width);
         final float defaultRadius = res.getDimension(R.dimen.default_circle_indicator_radius);
         final boolean defaultCentered = res.getBoolean(R.bool.default_circle_indicator_centered);
         final boolean defaultSnap = res.getBoolean(R.bool.default_circle_indicator_snap);
 
         //Retrieve styles attributes
-        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CirclePageIndicator, defStyle, 0);
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CirclePageIndicator,
+                defStyle, 0);
 
         mCentered = a.getBoolean(R.styleable.CirclePageIndicator_centered, defaultCentered);
-        mOrientation = a.getInt(R.styleable.CirclePageIndicator_android_orientation, defaultOrientation);
+        mOrientation = a.getInt(R.styleable.CirclePageIndicator_android_orientation,
+                defaultOrientation);
         mPaintPageFill.setStyle(Style.FILL);
-        mPaintPageFill.setColor(a.getColor(R.styleable.CirclePageIndicator_pageColor, defaultPageColor));
+        mPaintPageFill.setColor(
+                a.getColor(R.styleable.CirclePageIndicator_pageColor, defaultPageColor));
         mPaintStroke.setStyle(Style.STROKE);
-        mPaintStroke.setColor(a.getColor(R.styleable.CirclePageIndicator_strokeColor, defaultStrokeColor));
-        mPaintStroke.setStrokeWidth(a.getDimension(R.styleable.CirclePageIndicator_strokeWidth, defaultStrokeWidth));
+        mPaintStroke.setColor(
+                a.getColor(R.styleable.CirclePageIndicator_strokeColor, defaultStrokeColor));
+        mPaintStroke.setStrokeWidth(
+                a.getDimension(R.styleable.CirclePageIndicator_strokeWidth, defaultStrokeWidth));
         mPaintFill.setStyle(Style.FILL);
-        mPaintFill.setColor(a.getColor(R.styleable.CirclePageIndicator_fillColor, defaultFillColor));
+        mPaintFill.setColor(
+                a.getColor(R.styleable.CirclePageIndicator_fillColor, defaultFillColor));
         mRadius = a.getDimension(R.styleable.CirclePageIndicator_radius, defaultRadius);
         mSnap = a.getBoolean(R.styleable.CirclePageIndicator_snap, defaultSnap);
 
@@ -151,7 +159,8 @@ public class CirclePageIndicator extends View implements PageIndicator {
                 break;
 
             default:
-                throw new IllegalArgumentException("Orientation must be either HORIZONTAL or VERTICAL.");
+                throw new IllegalArgumentException(
+                        "Orientation must be either HORIZONTAL or VERTICAL.");
         }
     }
 
@@ -232,7 +241,8 @@ public class CirclePageIndicator extends View implements PageIndicator {
         final float shortOffset = shortPaddingBefore + mRadius;
         float longOffset = longPaddingBefore + mRadius;
         if (mCentered) {
-            longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f) - ((count * threeRadius) / 2.0f);
+            longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f) - (
+                    (count * threeRadius) / 2.0f);
         }
 
         float dX;
@@ -255,7 +265,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
             }
             // Only paint fill if not completely transparent
             if (mPaintPageFill.getAlpha() > 0) {
-                canvas.drawCircle(dX, dY, (float) (pageFillRadius/1.5f), mPaintPageFill);
+                canvas.drawCircle(dX, dY, pageFillRadius / 1.5f, mPaintPageFill);
             }
 
             // Only paint stroke if a stroke width was non-zero
@@ -295,7 +305,8 @@ public class CirclePageIndicator extends View implements PageIndicator {
                 break;
 
             case MotionEvent.ACTION_MOVE: {
-                final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
+                final int activePointerIndex = MotionEventCompat.findPointerIndex(ev,
+                        mActivePointerId);
                 final float x = MotionEventCompat.getX(ev, activePointerIndex);
                 final float deltaX = x - mLastMotionX;
 
@@ -355,7 +366,8 @@ public class CirclePageIndicator extends View implements PageIndicator {
                     final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
                     mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
                 }
-                mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId));
+                mLastMotionX = MotionEventCompat.getX(ev,
+                        MotionEventCompat.findPointerIndex(ev, mActivePointerId));
                 break;
         }
 
@@ -454,8 +466,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
     /**
      * Determines the width of this view
      *
-     * @param measureSpec
-     *            A measureSpec packed into an int
+     * @param measureSpec A measureSpec packed into an int
      * @return The width of the view, honoring constraints from measureSpec
      */
     private int measureLong(int measureSpec) {
@@ -469,7 +480,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
         } else {
             //Calculate the width according the views count
             final int count = mViewPager.getAdapter().getCount();
-            result = (int)(getPaddingLeft() + getPaddingRight()
+            result = (int) (getPaddingLeft() + getPaddingRight()
                     + (count * 2 * mRadius) + (count - 1) * mRadius + 1);
             //Respect AT_MOST value if that was what is called for by measureSpec
             if (specMode == MeasureSpec.AT_MOST) {
@@ -482,8 +493,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
     /**
      * Determines the height of this view
      *
-     * @param measureSpec
-     *            A measureSpec packed into an int
+     * @param measureSpec A measureSpec packed into an int
      * @return The height of the view, honoring constraints from measureSpec
      */
     private int measureShort(int measureSpec) {
@@ -496,7 +506,7 @@ public class CirclePageIndicator extends View implements PageIndicator {
             result = specSize;
         } else {
             //Measure the height
-            result = (int)(2 * mRadius + getPaddingTop() + getPaddingBottom() + 1);
+            result = (int) (2 * mRadius + getPaddingTop() + getPaddingBottom() + 1);
             //Respect AT_MOST value if that was what is called for by measureSpec
             if (specMode == MeasureSpec.AT_MOST) {
                 result = Math.min(result, specSize);
diff --git a/src/org/lineageos/audiofx/viewpagerindicator/PageIndicator.java b/src/org/lineageos/audiofx/viewpagerindicator/PageIndicator.java
index 9e9fc7b..97bfa34 100644
--- a/src/org/lineageos/audiofx/viewpagerindicator/PageIndicator.java
+++ b/src/org/lineageos/audiofx/viewpagerindicator/PageIndicator.java
@@ -20,8 +20,8 @@ package org.lineageos.audiofx.viewpagerindicator;
 import androidx.viewpager.widget.ViewPager;
 
 /**
- * A PageIndicator is responsible to show an visual indicator on the total views
- * number and the current visible view.
+ * A PageIndicator is responsible to show an visual indicator on the total views number and the
+ * current visible view.
  */
 public interface PageIndicator extends ViewPager.OnPageChangeListener {
     /**
diff --git a/src/org/lineageos/audiofx/widget/Biquad.java b/src/org/lineageos/audiofx/widget/Biquad.java
index 216acde..d50dd42 100644
--- a/src/org/lineageos/audiofx/widget/Biquad.java
+++ b/src/org/lineageos/audiofx/widget/Biquad.java
@@ -26,15 +26,15 @@ public class Biquad {
     public void setHighShelf(double centerFrequency, double samplingFrequency,
             double dbGain, double slope) {
         double w0 = 2 * Math.PI * centerFrequency / samplingFrequency;
-        double a = Math.pow(10, dbGain/40);
+        double a = Math.pow(10, dbGain / 40);
         double alpha = Math.sin(w0) / 2 * Math.sqrt((a + 1 / a) * (1 / slope - 1) + 2);
 
-        mB0 = new Complex(a*((a+1) + (a-1)   *Math.cos(w0) + 2*Math.sqrt(a)*alpha), 0);
-        mB1 = new Complex(-2*a*((a-1) + (a+1)*Math.cos(w0)), 0);
-        mB2 = new Complex(a*((a+1) + (a-1)   *Math.cos(w0) - 2*Math.sqrt(a)*alpha), 0);
-        mA0 = new Complex((a+1) - (a-1)      *Math.cos(w0) + 2*Math.sqrt(a)*alpha, 0);
-        mA1 = new Complex(2*((a-1) - (a+1)   *Math.cos(w0)), 0);
-        mA2 = new Complex((a+1) - (a-1)      *Math.cos(w0) - 2*Math.sqrt(a)*alpha, 0);
+        mB0 = new Complex(a * ((a + 1) + (a - 1) * Math.cos(w0) + 2 * Math.sqrt(a) * alpha), 0);
+        mB1 = new Complex(-2 * a * ((a - 1) + (a + 1) * Math.cos(w0)), 0);
+        mB2 = new Complex(a * ((a + 1) + (a - 1) * Math.cos(w0) - 2 * Math.sqrt(a) * alpha), 0);
+        mA0 = new Complex((a + 1) - (a - 1) * Math.cos(w0) + 2 * Math.sqrt(a) * alpha, 0);
+        mA1 = new Complex(2 * ((a - 1) - (a + 1) * Math.cos(w0)), 0);
+        mA2 = new Complex((a + 1) - (a - 1) * Math.cos(w0) - 2 * Math.sqrt(a) * alpha, 0);
     }
 
     public Complex evaluateTransfer(Complex z) {
diff --git a/src/org/lineageos/audiofx/widget/EqualizerSurface.java b/src/org/lineageos/audiofx/widget/EqualizerSurface.java
index 3a11e7f..ea6934d 100644
--- a/src/org/lineageos/audiofx/widget/EqualizerSurface.java
+++ b/src/org/lineageos/audiofx/widget/EqualizerSurface.java
@@ -12,7 +12,7 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
- * 
+ *
  * - Original code by Antti S. Lankila for DSPManager
  * - Modified extensively by cyanogen for multi-band support
  */
@@ -36,27 +36,27 @@ import android.util.Log;
 import android.view.MotionEvent;
 import android.view.SurfaceView;
 import android.view.View;
-
 import android.view.animation.DecelerateInterpolator;
+
 import org.lineageos.audiofx.R;
 
 import java.util.Arrays;
 
 public class EqualizerSurface extends SurfaceView implements ValueAnimator.AnimatorUpdateListener {
 
-    private static int SAMPLING_RATE = 44100;
+    private static final int SAMPLING_RATE = 44100;
 
     private int mWidth;
     private int mHeight;
 
     private float mMinFreq = 10;
     private float mMaxFreq = 21000;
-    
+
     private float mMinDB = -15;
     private float mMaxDB = 15;
-    
+
     private int mNumBands = 6;
-        
+
     private float[] mLevels = new float[mNumBands];
     private float[] mTargetLevels = new float[mNumBands];
     private float[] mCenterFreqs = new float[mNumBands];
@@ -76,7 +76,8 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
         mWhite = new Paint();
         mWhite.setColor(getResources().getColor(R.color.color_grey));
         mWhite.setStyle(Style.STROKE);
-        mWhite.setTextSize(mTextSize = context.getResources().getDimensionPixelSize(R.dimen.eq_label_text_size));
+        mWhite.setTextSize(mTextSize =
+                context.getResources().getDimensionPixelSize(R.dimen.eq_label_text_size));
         mWhite.setTypeface(Typeface.DEFAULT_BOLD);
         mWhite.setAntiAlias(true);
 
@@ -112,30 +113,31 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
 
     /**
      * Listener for bands being modified via touch events
-     *
-     * Invoked with the index of the modified band, and the
-     * new value in dB. If the widget is read-only, will set
-     * changed = false.
-     *
+     * <p>
+     * Invoked with the index of the modified band, and the new value in dB. If the widget is
+     * read-only, will set changed = false.
      */
     public interface BandUpdatedListener {
-        public void onBandUpdated(int band, float dB);
-        public void onBandAnimating(int band, float dB);
-        public void onBandAnimationCompleted();
+        void onBandUpdated(int band, float dB);
+
+        void onBandAnimating(int band, float dB);
+
+        void onBandAnimationCompleted();
     }
-    
+
     public void setBandLevelRange(float minDB, float maxDB) {
         mMinDB = minDB;
         mMaxDB = maxDB;
     }
-    
+
     public void setCenterFreqs(float[] centerFreqsKHz) {
         mNumBands = centerFreqsKHz.length;
         mLevels = new float[mNumBands];
         mCenterFreqs = Arrays.copyOf(centerFreqsKHz, mNumBands);
         System.arraycopy(centerFreqsKHz, 0, mCenterFreqs, 0, mNumBands);
         mMinFreq = mCenterFreqs[0] / 2;
-        mMaxFreq = (float) Math.pow(mCenterFreqs[mNumBands - 1], 2) / mCenterFreqs[mNumBands -2] / 2; 
+        mMaxFreq = (float) Math.pow(mCenterFreqs[mNumBands - 1], 2) / mCenterFreqs[mNumBands - 2]
+                / 2;
     }
 
     public float[] softCopyLevels() {
@@ -161,7 +163,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
         mLevels = b.getFloatArray("levels");
     }
     */
-    
+
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
@@ -171,11 +173,11 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
     }
 
     /**
-     * Returns a color that is assumed to be blended against black background,
-     * assuming close to sRGB behavior of screen (gamma 2.2 approximation).
+     * Returns a color that is assumed to be blended against black background, assuming close to
+     * sRGB behavior of screen (gamma 2.2 approximation).
      *
      * @param intensity desired physical intensity of color component
-     * @param alpha alpha value of color component
+     * @param alpha     alpha value of color component
      */
     private static int gamma(float intensity, float alpha) {
         /* intensity = (component * alpha)^2.2
@@ -203,26 +205,26 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
          * holo_blue < 0
          * holo_blue_dark < 3
          */
-        int[] responseColors = new int[] {
-            res.getColor(R.color.eq_yellow),
-            res.getColor(R.color.eq_green),
-            res.getColor(R.color.eq_holo_bright),
-            res.getColor(R.color.eq_holo_blue),
-            res.getColor(R.color.eq_holo_dark)
+        int[] responseColors = new int[]{
+                res.getColor(R.color.eq_yellow),
+                res.getColor(R.color.eq_green),
+                res.getColor(R.color.eq_holo_bright),
+                res.getColor(R.color.eq_holo_blue),
+                res.getColor(R.color.eq_holo_dark)
         };
-        float[] responsePositions = new float[] {
-            0, 0.2f, 0.45f, 0.6f, 1f
+        float[] responsePositions = new float[]{
+                0, 0.2f, 0.45f, 0.6f, 1f
         };
 
         mFrequencyResponseBg.setShader(new LinearGradient(0, 0, 0, mHeight - mTextSize,
                 responseColors, responsePositions, Shader.TileMode.CLAMP));
 
-        int[] barColors = new int[] {
+        int[] barColors = new int[]{
                 res.getColor(R.color.cb_shader),
                 res.getColor(R.color.cb_shader_alpha)
         };
-        float[] barPositions = new float[] {
-            0.95f, 1f
+        float[] barPositions = new float[]{
+                0.95f, 1f
         };
 
 //        mControlBar.setShader(new LinearGradient(0, 0, 0, mHeight - mTextSize,
@@ -232,6 +234,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
     int mPasses = 140;
     float[] mStartLevels;
     float[] mDeltas;
+
     public void setBands(float[] bands) {
         if (mAnimation != null) {
             mAnimation.cancel();
@@ -247,7 +250,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
             mDeltas[i] = mTargetLevels[i] - mStartLevels[i];
         }
 
-        mAnimation = ValueAnimator.ofFloat(0f,1f);
+        mAnimation = ValueAnimator.ofFloat(0f, 1f);
         mAnimation.addUpdateListener(this);
         mAnimation.addListener(new Animator.AnimatorListener() {
             @Override
@@ -283,7 +286,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
 
     @Override
     public void onAnimationUpdate(ValueAnimator animation) {
-        final float fraction = (Float) animation.getAnimatedFraction();
+        final float fraction = animation.getAnimatedFraction();
 //        final float fraction = ((Float) (animation.getAnimatedValue())).floatValue();
 
         for (int i = 0; i < mNumBands; i++) {
@@ -327,8 +330,8 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
         Path freqResponse = new Path();
         Complex[] zn = new Complex[biquads.length];
 //        final int passes = 140;
-        for (int i = 0; i < mPasses+1; i ++) {
-            double freq = reverseProjectX(i / (float)mPasses);
+        for (int i = 0; i < mPasses + 1; i++) {
+            double freq = reverseProjectX(i / (float) mPasses);
             double omega = freq / SAMPLING_RATE * Math.PI * 2;
             Complex z = new Complex(Math.cos(omega), Math.sin(omega));
 
@@ -386,7 +389,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
 //            canvas.drawText(String.format("%+d", (int)dB), 1, (y - 1), mWhite);
         }
 
-        for (int i = 0; i < mNumBands; i ++) {
+        for (int i = 0; i < mNumBands; i++) {
             float freq = mCenterFreqs[i];
             float x = projectX(freq) * mWidth;
 
@@ -399,28 +402,28 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
 
             int targetHeight = (mHeight);
 
-            int halfX = mBarWidth/2;
+            int halfX = mBarWidth / 2;
             if (y > targetHeight) {
                 int diff = (int) Math.abs(targetHeight - y);
-                canvas.drawRect(x-halfX, y+diff, x+halfX, targetHeight, mControlBar);
+                canvas.drawRect(x - halfX, y + diff, x + halfX, targetHeight, mControlBar);
             } else {
-                canvas.drawRect(x-halfX, y, x+halfX, targetHeight, mControlBar);
+                canvas.drawRect(x - halfX, y, x + halfX, targetHeight, mControlBar);
             }
 
             canvas.drawText(frequencyText, x, mWhite.getTextSize(), mControlBarText);
-            canvas.drawText(String.format("%+1.1f", mLevels[i]), x, y-1, mControlBarText);
+            canvas.drawText(String.format("%+1.1f", mLevels[i]), x, y - 1, mControlBarText);
         }
     }
 
     public void registerBandUpdatedListener(BandUpdatedListener listener) {
         mBandUpdatedListener = listener;
     }
-    
+
     @Override
     public boolean onTouchEvent(MotionEvent event) {
 
         if (!isEnabled()) {
-           return false;
+            return false;
         }
 
         float x = event.getX();
@@ -436,13 +439,13 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
         } else if (level > mMaxDB) {
             level = mMaxDB;
         }
-        
+
         setBand(band, level);
-        
+
         if (mBandUpdatedListener != null) {
             mBandUpdatedListener.onBandUpdated(band, level);
         }
-        
+
         return true;
     }
 
@@ -477,7 +480,7 @@ public class EqualizerSurface extends SurfaceView implements ValueAnimator.Anima
     public int findClosest(float px) {
         int idx = 0;
         float best = 1e9f;
-        for (int i = 0; i < mNumBands; i ++) {
+        for (int i = 0; i < mNumBands; i++) {
             float freq = mCenterFreqs[i];
             float cx = projectX(freq) * mWidth;
             float distance = Math.abs(cx - px);