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/*
* Copyright (C) 2011 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 com.android.settingslib.bluetooth;
import android.content.Context;
import android.os.Handler;
import android.os.UserHandle;
import android.util.Log;
import java.lang.ref.WeakReference;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresPermission;
/**
* LocalBluetoothManager provides a simplified interface on top of a subset of
* the Bluetooth API. Note that {@link #getInstance} will return null
* if there is no Bluetooth adapter on this device, and callers must be
* prepared to handle this case.
*/
public class LocalBluetoothManager {
private static final String TAG = "LocalBluetoothManager";
/** Singleton instance. */
private static LocalBluetoothManager sInstance;
private final Context mContext;
/** If a BT-related activity is in the foreground, this will be it. */
private WeakReference<Context> mForegroundActivity;
private final LocalBluetoothAdapter mLocalAdapter;
private final CachedBluetoothDeviceManager mCachedDeviceManager;
/** The Bluetooth profile manager. */
private final LocalBluetoothProfileManager mProfileManager;
/** The broadcast receiver event manager. */
private final BluetoothEventManager mEventManager;
@Nullable
public static synchronized LocalBluetoothManager getInstance(Context context,
BluetoothManagerCallback onInitCallback) {
if (sInstance == null) {
LocalBluetoothAdapter adapter = LocalBluetoothAdapter.getInstance();
if (adapter == null) {
return null;
}
// This will be around as long as this process is
sInstance = new LocalBluetoothManager(adapter, context, /* handler= */ null,
/* userHandle= */ null);
if (onInitCallback != null) {
onInitCallback.onBluetoothManagerInitialized(context.getApplicationContext(),
sInstance);
}
}
return sInstance;
}
/**
* Returns a new instance of {@link LocalBluetoothManager} or null if Bluetooth is not
* supported for this hardware. This instance should be globally cached by the caller.
*/
@Nullable
public static LocalBluetoothManager create(Context context, Handler handler) {
LocalBluetoothAdapter adapter = LocalBluetoothAdapter.getInstance();
if (adapter == null) {
return null;
}
return new LocalBluetoothManager(adapter, context, handler, /* userHandle= */ null);
}
/**
* Returns a new instance of {@link LocalBluetoothManager} or null if Bluetooth is not
* supported for this hardware. This instance should be globally cached by the caller.
*
* <p> Allows to specify a {@link UserHandle} for which to receive bluetooth events.
*
* <p> Requires {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission.
*/
@Nullable
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
public static LocalBluetoothManager create(Context context, Handler handler,
UserHandle userHandle) {
LocalBluetoothAdapter adapter = LocalBluetoothAdapter.getInstance();
if (adapter == null) {
return null;
}
return new LocalBluetoothManager(adapter, context, handler,
userHandle);
}
private LocalBluetoothManager(LocalBluetoothAdapter adapter, Context context, Handler handler,
UserHandle userHandle) {
mContext = context.getApplicationContext();
mLocalAdapter = adapter;
mCachedDeviceManager = new CachedBluetoothDeviceManager(mContext, this);
mEventManager = new BluetoothEventManager(mLocalAdapter, mCachedDeviceManager, mContext,
handler, userHandle);
mProfileManager = new LocalBluetoothProfileManager(mContext,
mLocalAdapter, mCachedDeviceManager, mEventManager);
mProfileManager.updateLocalProfiles();
mEventManager.readPairedDevices();
}
public LocalBluetoothAdapter getBluetoothAdapter() {
return mLocalAdapter;
}
public Context getContext() {
return mContext;
}
public Context getForegroundActivity() {
return mForegroundActivity == null
? null
: mForegroundActivity.get();
}
public boolean isForegroundActivity() {
return mForegroundActivity != null && mForegroundActivity.get() != null;
}
public synchronized void setForegroundActivity(Context context) {
if (context != null) {
Log.d(TAG, "setting foreground activity to non-null context");
mForegroundActivity = new WeakReference<>(context);
} else {
if (mForegroundActivity != null) {
Log.d(TAG, "setting foreground activity to null");
mForegroundActivity = null;
}
}
}
public CachedBluetoothDeviceManager getCachedDeviceManager() {
return mCachedDeviceManager;
}
public BluetoothEventManager getEventManager() {
return mEventManager;
}
public LocalBluetoothProfileManager getProfileManager() {
return mProfileManager;
}
public interface BluetoothManagerCallback {
void onBluetoothManagerInitialized(Context appContext,
LocalBluetoothManager bluetoothManager);
}
}
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