Merge changes from topic "migrate-sc-bt" into sc-v2-dev-plus-aosp

* changes:
  Migrating BT files into packages/modules/Bluetooth
  Merge history of Bluetooth API from frameworks/base

1 files changed, 1149 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothA2dp.java b/framework/java/android/bluetooth/BluetoothA2dp.java
new file mode 100644
index 0000000000..8b9cec17a1
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothA2dp.java
@@ -0,0 +1,1149 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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.
+ */
+
+package android.bluetooth;
+
+import static android.bluetooth.BluetoothUtils.getSyncTimeout;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresNoPermission;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.SystemApi;
+import android.bluetooth.annotations.RequiresBluetoothConnectPermission;
+import android.bluetooth.annotations.RequiresLegacyBluetoothAdminPermission;
+import android.bluetooth.annotations.RequiresLegacyBluetoothPermission;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.content.AttributionSource;
+import android.content.Context;
+import android.os.Build;
+import android.os.IBinder;
+import android.os.ParcelUuid;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.modules.utils.SynchronousResultReceiver;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeoutException;
+
+
+/**
+ * This class provides the public APIs to control the Bluetooth A2DP
+ * profile.
+ *
+ * <p>BluetoothA2dp is a proxy object for controlling the Bluetooth A2DP
+ * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
+ * the BluetoothA2dp proxy object.
+ *
+ * <p> Android only supports one connected Bluetooth A2dp device at a time.
+ * Each method is protected with its appropriate permission.
+ */
+public final class BluetoothA2dp implements BluetoothProfile {
+    private static final String TAG = "BluetoothA2dp";
+    private static final boolean DBG = true;
+    private static final boolean VDBG = false;
+
+    /**
+     * Intent used to broadcast the change in connection state of the A2DP
+     * profile.
+     *
+     * <p>This intent will have 3 extras:
+     * <ul>
+     * <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
+     * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
+     * </ul>
+     *
+     * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
+     * {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING},
+     * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CONNECTION_STATE_CHANGED =
+            "android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED";
+
+    /**
+     * Intent used to broadcast the change in the Playing state of the A2DP
+     * profile.
+     *
+     * <p>This intent will have 3 extras:
+     * <ul>
+     * <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
+     * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile. </li>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
+     * </ul>
+     *
+     * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
+     * {@link #STATE_PLAYING}, {@link #STATE_NOT_PLAYING},
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_PLAYING_STATE_CHANGED =
+            "android.bluetooth.a2dp.profile.action.PLAYING_STATE_CHANGED";
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_AVRCP_CONNECTION_STATE_CHANGED =
+            "android.bluetooth.a2dp.profile.action.AVRCP_CONNECTION_STATE_CHANGED";
+
+    /**
+     * Intent used to broadcast the selection of a connected device as active.
+     *
+     * <p>This intent will have one extra:
+     * <ul>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. It can
+     * be null if no device is active. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage(trackingBug = 171933273)
+    public static final String ACTION_ACTIVE_DEVICE_CHANGED =
+            "android.bluetooth.a2dp.profile.action.ACTIVE_DEVICE_CHANGED";
+
+    /**
+     * Intent used to broadcast the change in the Audio Codec state of the
+     * A2DP Source profile.
+     *
+     * <p>This intent will have 2 extras:
+     * <ul>
+     * <li> {@link BluetoothCodecStatus#EXTRA_CODEC_STATUS} - The codec status. </li>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device if the device is currently
+     * connected, otherwise it is not included.</li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage(trackingBug = 181103983)
+    public static final String ACTION_CODEC_CONFIG_CHANGED =
+            "android.bluetooth.a2dp.profile.action.CODEC_CONFIG_CHANGED";
+
+    /**
+     * A2DP sink device is streaming music. This state can be one of
+     * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
+     * {@link #ACTION_PLAYING_STATE_CHANGED} intent.
+     */
+    public static final int STATE_PLAYING = 10;
+
+    /**
+     * A2DP sink device is NOT streaming music. This state can be one of
+     * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
+     * {@link #ACTION_PLAYING_STATE_CHANGED} intent.
+     */
+    public static final int STATE_NOT_PLAYING = 11;
+
+    /** @hide */
+    @IntDef(prefix = "OPTIONAL_CODECS_", value = {
+            OPTIONAL_CODECS_SUPPORT_UNKNOWN,
+            OPTIONAL_CODECS_NOT_SUPPORTED,
+            OPTIONAL_CODECS_SUPPORTED
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface OptionalCodecsSupportStatus {}
+
+    /**
+     * We don't have a stored preference for whether or not the given A2DP sink device supports
+     * optional codecs.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_SUPPORT_UNKNOWN = -1;
+
+    /**
+     * The given A2DP sink device does not support optional codecs.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_NOT_SUPPORTED = 0;
+
+    /**
+     * The given A2DP sink device does support optional codecs.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_SUPPORTED = 1;
+
+    /** @hide */
+    @IntDef(prefix = "OPTIONAL_CODECS_PREF_", value = {
+            OPTIONAL_CODECS_PREF_UNKNOWN,
+            OPTIONAL_CODECS_PREF_DISABLED,
+            OPTIONAL_CODECS_PREF_ENABLED
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface OptionalCodecsPreferenceStatus {}
+
+    /**
+     * We don't have a stored preference for whether optional codecs should be enabled or
+     * disabled for the given A2DP device.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_PREF_UNKNOWN = -1;
+
+    /**
+     * Optional codecs should be disabled for the given A2DP device.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_PREF_DISABLED = 0;
+
+    /**
+     * Optional codecs should be enabled for the given A2DP device.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int OPTIONAL_CODECS_PREF_ENABLED = 1;
+
+    /** @hide */
+    @IntDef(prefix = "DYNAMIC_BUFFER_SUPPORT_", value = {
+            DYNAMIC_BUFFER_SUPPORT_NONE,
+            DYNAMIC_BUFFER_SUPPORT_A2DP_OFFLOAD,
+            DYNAMIC_BUFFER_SUPPORT_A2DP_SOFTWARE_ENCODING
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface Type {}
+
+    /**
+     * Indicates the supported type of Dynamic Audio Buffer is not supported.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int DYNAMIC_BUFFER_SUPPORT_NONE = 0;
+
+    /**
+     * Indicates the supported type of Dynamic Audio Buffer is A2DP offload.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int DYNAMIC_BUFFER_SUPPORT_A2DP_OFFLOAD = 1;
+
+    /**
+     * Indicates the supported type of Dynamic Audio Buffer is A2DP software encoding.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int DYNAMIC_BUFFER_SUPPORT_A2DP_SOFTWARE_ENCODING = 2;
+
+    private final BluetoothAdapter mAdapter;
+    private final AttributionSource mAttributionSource;
+    private final BluetoothProfileConnector<IBluetoothA2dp> mProfileConnector =
+            new BluetoothProfileConnector(this, BluetoothProfile.A2DP, "BluetoothA2dp",
+                    IBluetoothA2dp.class.getName()) {
+                @Override
+                public IBluetoothA2dp getServiceInterface(IBinder service) {
+                    return IBluetoothA2dp.Stub.asInterface(service);
+                }
+    };
+
+    /**
+     * Create a BluetoothA2dp proxy object for interacting with the local
+     * Bluetooth A2DP service.
+     */
+    /* package */ BluetoothA2dp(Context context, ServiceListener listener,
+            BluetoothAdapter adapter) {
+        mAdapter = adapter;
+        mAttributionSource = adapter.getAttributionSource();
+        mProfileConnector.connect(context, listener);
+    }
+
+    @UnsupportedAppUsage
+    /*package*/ void close() {
+        mProfileConnector.disconnect();
+    }
+
+    private IBluetoothA2dp getService() {
+        return mProfileConnector.getService();
+    }
+
+    @Override
+    public void finalize() {
+        // The empty finalize needs to be kept or the
+        // cts signature tests would fail.
+    }
+
+    /**
+     * Initiate connection to a profile of the remote Bluetooth device.
+     *
+     * <p> This API returns false in scenarios like the profile on the
+     * device is already connected or Bluetooth is not turned on.
+     * When this API returns true, it is guaranteed that
+     * connection state intent for the profile will be broadcasted with
+     * the state. Users can get the connection state of the profile
+     * from this intent.
+     *
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @UnsupportedAppUsage
+    public boolean connect(BluetoothDevice device) {
+        if (DBG) log("connect(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.connectWithAttribution(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Initiate disconnection from a profile
+     *
+     * <p> This API will return false in scenarios like the profile on the
+     * Bluetooth device is not in connected state etc. When this API returns,
+     * true, it is guaranteed that the connection state change
+     * intent will be broadcasted with the state. Users can get the
+     * disconnection state of the profile from this intent.
+     *
+     * <p> If the disconnection is initiated by a remote device, the state
+     * will transition from {@link #STATE_CONNECTED} to
+     * {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the
+     * host (local) device the state will transition from
+     * {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to
+     * state {@link #STATE_DISCONNECTED}. The transition to
+     * {@link #STATE_DISCONNECTING} can be used to distinguish between the
+     * two scenarios.
+     *
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @UnsupportedAppUsage
+    public boolean disconnect(BluetoothDevice device) {
+        if (DBG) log("disconnect(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.disconnectWithAttribution(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public List<BluetoothDevice> getConnectedDevices() {
+        if (VDBG) log("getConnectedDevices()");
+        final IBluetoothA2dp service = getService();
+        final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<List<BluetoothDevice>> recv =
+                        new SynchronousResultReceiver();
+                service.getConnectedDevicesWithAttribution(mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
+        if (VDBG) log("getDevicesMatchingStates()");
+        final IBluetoothA2dp service = getService();
+        final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<List<BluetoothDevice>> recv =
+                        new SynchronousResultReceiver();
+                service.getDevicesMatchingConnectionStatesWithAttribution(states,
+                        mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @BtProfileState int getConnectionState(BluetoothDevice device) {
+        if (VDBG) log("getState(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final int defaultValue = BluetoothProfile.STATE_DISCONNECTED;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getConnectionStateWithAttribution(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Select a connected device as active.
+     *
+     * The active device selection is per profile. An active device's
+     * purpose is profile-specific. For example, A2DP audio streaming
+     * is to the active A2DP Sink device. If a remote device is not
+     * connected, it cannot be selected as active.
+     *
+     * <p> This API returns false in scenarios like the profile on the
+     * device is not connected or Bluetooth is not turned on.
+     * When this API returns true, it is guaranteed that the
+     * {@link #ACTION_ACTIVE_DEVICE_CHANGED} intent will be broadcasted
+     * with the active device.
+     *
+     * @param device the remote Bluetooth device. Could be null to clear
+     * the active device and stop streaming audio to a Bluetooth device.
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @UnsupportedAppUsage(trackingBug = 171933273)
+    public boolean setActiveDevice(@Nullable BluetoothDevice device) {
+        if (DBG) log("setActiveDevice(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && ((device == null) || isValidDevice(device))) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.setActiveDevice(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Get the connected device that is active.
+     *
+     * @return the connected device that is active or null if no device
+     * is active
+     * @hide
+     */
+    @UnsupportedAppUsage(trackingBug = 171933273)
+    @Nullable
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothDevice getActiveDevice() {
+        if (VDBG) log("getActiveDevice()");
+        final IBluetoothA2dp service = getService();
+        final BluetoothDevice defaultValue = null;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<BluetoothDevice> recv =
+                        new SynchronousResultReceiver();
+                service.getActiveDevice(mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Set priority of the profile
+     *
+     * <p> The device should already be paired.
+     * Priority can be one of {@link #PRIORITY_ON} or {@link #PRIORITY_OFF}
+     *
+     * @param device Paired bluetooth device
+     * @param priority
+     * @return true if priority is set, false on error
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setPriority(BluetoothDevice device, int priority) {
+        if (DBG) log("setPriority(" + device + ", " + priority + ")");
+        return setConnectionPolicy(device, BluetoothAdapter.priorityToConnectionPolicy(priority));
+    }
+
+    /**
+     * Set connection policy of the profile
+     *
+     * <p> The device should already be paired.
+     * Connection policy can be one of {@link #CONNECTION_POLICY_ALLOWED},
+     * {@link #CONNECTION_POLICY_FORBIDDEN}, {@link #CONNECTION_POLICY_UNKNOWN}
+     *
+     * @param device Paired bluetooth device
+     * @param connectionPolicy is the connection policy to set to for this profile
+     * @return true if connectionPolicy is set, false on error
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setConnectionPolicy(@NonNull BluetoothDevice device,
+            @ConnectionPolicy int connectionPolicy) {
+        if (DBG) log("setConnectionPolicy(" + device + ", " + connectionPolicy + ")");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)
+                    && (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN
+                        || connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.setConnectionPolicy(device, connectionPolicy, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Get the priority of the profile.
+     *
+     * <p> The priority can be any of:
+     * {@link #PRIORITY_OFF}, {@link #PRIORITY_ON}, {@link #PRIORITY_UNDEFINED}
+     *
+     * @param device Bluetooth device
+     * @return priority of the device
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
+    public int getPriority(BluetoothDevice device) {
+        if (VDBG) log("getPriority(" + device + ")");
+        return BluetoothAdapter.connectionPolicyToPriority(getConnectionPolicy(device));
+    }
+
+    /**
+     * Get the connection policy of the profile.
+     *
+     * <p> The connection policy can be any of:
+     * {@link #CONNECTION_POLICY_ALLOWED}, {@link #CONNECTION_POLICY_FORBIDDEN},
+     * {@link #CONNECTION_POLICY_UNKNOWN}
+     *
+     * @param device Bluetooth device
+     * @return connection policy of the device
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public @ConnectionPolicy int getConnectionPolicy(@NonNull BluetoothDevice device) {
+        if (VDBG) log("getConnectionPolicy(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final int defaultValue = BluetoothProfile.CONNECTION_POLICY_FORBIDDEN;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getConnectionPolicy(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Checks if Avrcp device supports the absolute volume feature.
+     *
+     * @return true if device supports absolute volume
+     * @hide
+     */
+    @RequiresNoPermission
+    public boolean isAvrcpAbsoluteVolumeSupported() {
+        if (DBG) Log.d(TAG, "isAvrcpAbsoluteVolumeSupported");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.isAvrcpAbsoluteVolumeSupported(recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Tells remote device to set an absolute volume. Only if absolute volume is supported
+     *
+     * @param volume Absolute volume to be set on AVRCP side
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void setAvrcpAbsoluteVolume(int volume) {
+        if (DBG) Log.d(TAG, "setAvrcpAbsoluteVolume");
+        final IBluetoothA2dp service = getService();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                service.setAvrcpAbsoluteVolume(volume, mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+    }
+
+    /**
+     * Check if A2DP profile is streaming music.
+     *
+     * @param device BluetoothDevice device
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean isA2dpPlaying(BluetoothDevice device) {
+        if (DBG) log("isA2dpPlaying(" + device + ")");
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.isA2dpPlaying(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * This function checks if the remote device is an AVCRP
+     * target and thus whether we should send volume keys
+     * changes or not.
+     *
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean shouldSendVolumeKeys(BluetoothDevice device) {
+        if (isEnabled() && isValidDevice(device)) {
+            ParcelUuid[] uuids = device.getUuids();
+            if (uuids == null) return false;
+
+            for (ParcelUuid uuid : uuids) {
+                if (uuid.equals(BluetoothUuid.AVRCP_TARGET)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Gets the current codec status (configuration and capability).
+     *
+     * @param device the remote Bluetooth device.
+     * @return the current codec status
+     * @hide
+     */
+    @UnsupportedAppUsage(trackingBug = 181103983)
+    @Nullable
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothCodecStatus getCodecStatus(@NonNull BluetoothDevice device) {
+        if (DBG) Log.d(TAG, "getCodecStatus(" + device + ")");
+        verifyDeviceNotNull(device, "getCodecStatus");
+        final IBluetoothA2dp service = getService();
+        final BluetoothCodecStatus defaultValue = null;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<BluetoothCodecStatus> recv =
+                        new SynchronousResultReceiver();
+                service.getCodecStatus(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Sets the codec configuration preference.
+     *
+     * @param device the remote Bluetooth device.
+     * @param codecConfig the codec configuration preference
+     * @hide
+     */
+    @UnsupportedAppUsage(trackingBug = 181103983)
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void setCodecConfigPreference(@NonNull BluetoothDevice device,
+                                         @NonNull BluetoothCodecConfig codecConfig) {
+        if (DBG) Log.d(TAG, "setCodecConfigPreference(" + device + ")");
+        verifyDeviceNotNull(device, "setCodecConfigPreference");
+        if (codecConfig == null) {
+            Log.e(TAG, "setCodecConfigPreference: Codec config can't be null");
+            throw new IllegalArgumentException("codecConfig cannot be null");
+        }
+        final IBluetoothA2dp service = getService();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                service.setCodecConfigPreference(device, codecConfig, mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+    }
+
+    /**
+     * Enables the optional codecs.
+     *
+     * @param device the remote Bluetooth device.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void enableOptionalCodecs(@NonNull BluetoothDevice device) {
+        if (DBG) Log.d(TAG, "enableOptionalCodecs(" + device + ")");
+        verifyDeviceNotNull(device, "enableOptionalCodecs");
+        enableDisableOptionalCodecs(device, true);
+    }
+
+    /**
+     * Disables the optional codecs.
+     *
+     * @param device the remote Bluetooth device.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void disableOptionalCodecs(@NonNull BluetoothDevice device) {
+        if (DBG) Log.d(TAG, "disableOptionalCodecs(" + device + ")");
+        verifyDeviceNotNull(device, "disableOptionalCodecs");
+        enableDisableOptionalCodecs(device, false);
+    }
+
+    /**
+     * Enables or disables the optional codecs.
+     *
+     * @param device the remote Bluetooth device.
+     * @param enable if true, enable the optional codecs, other disable them
+     */
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    private void enableDisableOptionalCodecs(BluetoothDevice device, boolean enable) {
+        final IBluetoothA2dp service = getService();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                if (enable) {
+                    service.enableOptionalCodecs(device, mAttributionSource);
+                } else {
+                    service.disableOptionalCodecs(device, mAttributionSource);
+                }
+            } catch (RemoteException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+    }
+
+    /**
+     * Returns whether this device supports optional codecs.
+     *
+     * @param device The device to check
+     * @return one of OPTIONAL_CODECS_SUPPORT_UNKNOWN, OPTIONAL_CODECS_NOT_SUPPORTED, or
+     * OPTIONAL_CODECS_SUPPORTED.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @OptionalCodecsSupportStatus
+    public int isOptionalCodecsSupported(@NonNull BluetoothDevice device) {
+        if (DBG) log("isOptionalCodecsSupported(" + device + ")");
+        verifyDeviceNotNull(device, "isOptionalCodecsSupported");
+        final IBluetoothA2dp service = getService();
+        final int defaultValue = OPTIONAL_CODECS_SUPPORT_UNKNOWN;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.supportsOptionalCodecs(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Returns whether this device should have optional codecs enabled.
+     *
+     * @param device The device in question.
+     * @return one of OPTIONAL_CODECS_PREF_UNKNOWN, OPTIONAL_CODECS_PREF_ENABLED, or
+     * OPTIONAL_CODECS_PREF_DISABLED.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @OptionalCodecsPreferenceStatus
+    public int isOptionalCodecsEnabled(@NonNull BluetoothDevice device) {
+        if (DBG) log("isOptionalCodecsEnabled(" + device + ")");
+        verifyDeviceNotNull(device, "isOptionalCodecsEnabled");
+        final IBluetoothA2dp service = getService();
+        final int defaultValue = OPTIONAL_CODECS_PREF_UNKNOWN;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getOptionalCodecsEnabled(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Sets a persistent preference for whether a given device should have optional codecs enabled.
+     *
+     * @param device The device to set this preference for.
+     * @param value Whether the optional codecs should be enabled for this device.  This should be
+     * one of OPTIONAL_CODECS_PREF_UNKNOWN, OPTIONAL_CODECS_PREF_ENABLED, or
+     * OPTIONAL_CODECS_PREF_DISABLED.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void setOptionalCodecsEnabled(@NonNull BluetoothDevice device,
+            @OptionalCodecsPreferenceStatus int value) {
+        if (DBG) log("setOptionalCodecsEnabled(" + device + ")");
+        verifyDeviceNotNull(device, "setOptionalCodecsEnabled");
+        if (value != BluetoothA2dp.OPTIONAL_CODECS_PREF_UNKNOWN
+                && value != BluetoothA2dp.OPTIONAL_CODECS_PREF_DISABLED
+                && value != BluetoothA2dp.OPTIONAL_CODECS_PREF_ENABLED) {
+            Log.e(TAG, "Invalid value passed to setOptionalCodecsEnabled: " + value);
+            return;
+        }
+        final IBluetoothA2dp service = getService();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled() && isValidDevice(device)) {
+            try {
+                service.setOptionalCodecsEnabled(device, value, mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+    }
+
+    /**
+     * Get the supported type of the Dynamic Audio Buffer.
+     * <p>Possible return values are
+     * {@link #DYNAMIC_BUFFER_SUPPORT_NONE},
+     * {@link #DYNAMIC_BUFFER_SUPPORT_A2DP_OFFLOAD},
+     * {@link #DYNAMIC_BUFFER_SUPPORT_A2DP_SOFTWARE_ENCODING}.
+     *
+     * @return supported type of Dynamic Audio Buffer feature
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public @Type int getDynamicBufferSupport() {
+        if (VDBG) log("getDynamicBufferSupport()");
+        final IBluetoothA2dp service = getService();
+        final int defaultValue = DYNAMIC_BUFFER_SUPPORT_NONE;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getDynamicBufferSupport(mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Return the record of {@link BufferConstraints} object that
+     * has the default/maximum/minimum audio buffer. This can be used to inform what the controller
+     * has support for the audio buffer.
+     *
+     * @return a record with {@link BufferConstraints} or null if report is unavailable
+     * or unsupported
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public @Nullable BufferConstraints getBufferConstraints() {
+        if (VDBG) log("getBufferConstraints()");
+        final IBluetoothA2dp service = getService();
+        final BufferConstraints defaultValue = null;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<BufferConstraints> recv =
+                        new SynchronousResultReceiver();
+                service.getBufferConstraints(mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Set Dynamic Audio Buffer Size.
+     *
+     * @param codec audio codec
+     * @param value buffer millis
+     * @return true to indicate success, or false on immediate error
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setBufferLengthMillis(@BluetoothCodecConfig.SourceCodecType int codec,
+            int value) {
+        if (VDBG) log("setBufferLengthMillis(" + codec + ", " + value + ")");
+        if (value < 0) {
+            Log.e(TAG, "Trying to set audio buffer length to a negative value: " + value);
+            return false;
+        }
+        final IBluetoothA2dp service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.setBufferLengthMillis(codec, value, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Helper for converting a state to a string.
+     *
+     * For debug use only - strings are not internationalized.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
+    public static String stateToString(int state) {
+        switch (state) {
+            case STATE_DISCONNECTED:
+                return "disconnected";
+            case STATE_CONNECTING:
+                return "connecting";
+            case STATE_CONNECTED:
+                return "connected";
+            case STATE_DISCONNECTING:
+                return "disconnecting";
+            case STATE_PLAYING:
+                return "playing";
+            case STATE_NOT_PLAYING:
+                return "not playing";
+            default:
+                return "<unknown state " + state + ">";
+        }
+    }
+
+    private boolean isEnabled() {
+        if (mAdapter.getState() == BluetoothAdapter.STATE_ON) return true;
+        return false;
+    }
+
+    private void verifyDeviceNotNull(BluetoothDevice device, String methodName) {
+        if (device == null) {
+            Log.e(TAG, methodName + ": device param is null");
+            throw new IllegalArgumentException("Device cannot be null");
+        }
+    }
+
+    private boolean isValidDevice(BluetoothDevice device) {
+        if (device == null) return false;
+
+        if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) return true;
+        return false;
+    }
+
+    private static void log(String msg) {
+        Log.d(TAG, msg);
+    }
+}