| /* |
| * 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); |
| } |
| } |