| /* |
| * Copyright 2019 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 android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.util.Log; |
| |
| /** |
| * Connector for Bluetooth profile proxies to bind manager service and |
| * profile services |
| * @param <T> The Bluetooth profile interface for this connection. |
| * @hide |
| */ |
| public abstract class BluetoothProfileConnector<T> { |
| private final int mProfileId; |
| private BluetoothProfile.ServiceListener mServiceListener; |
| private final BluetoothProfile mProfileProxy; |
| private Context mContext; |
| private final String mProfileName; |
| private final String mServiceName; |
| private volatile T mService; |
| |
| private final IBluetoothStateChangeCallback mBluetoothStateChangeCallback = |
| new IBluetoothStateChangeCallback.Stub() { |
| public void onBluetoothStateChange(boolean up) { |
| if (up) { |
| doBind(); |
| } else { |
| doUnbind(); |
| } |
| } |
| }; |
| |
| private final ServiceConnection mConnection = new ServiceConnection() { |
| public void onServiceConnected(ComponentName className, IBinder service) { |
| logDebug("Proxy object connected"); |
| mService = getServiceInterface(service); |
| |
| if (mServiceListener != null) { |
| mServiceListener.onServiceConnected(mProfileId, mProfileProxy); |
| } |
| } |
| |
| public void onServiceDisconnected(ComponentName className) { |
| logDebug("Proxy object disconnected"); |
| doUnbind(); |
| if (mServiceListener != null) { |
| mServiceListener.onServiceDisconnected(mProfileId); |
| } |
| } |
| }; |
| |
| BluetoothProfileConnector(BluetoothProfile profile, int profileId, String profileName, |
| String serviceName) { |
| mProfileId = profileId; |
| mProfileProxy = profile; |
| mProfileName = profileName; |
| mServiceName = serviceName; |
| } |
| |
| private boolean doBind() { |
| synchronized (mConnection) { |
| if (mService == null) { |
| logDebug("Binding service..."); |
| try { |
| Intent intent = new Intent(mServiceName); |
| ComponentName comp = intent.resolveSystemService( |
| mContext.getPackageManager(), 0); |
| intent.setComponent(comp); |
| if (comp == null || !mContext.bindServiceAsUser(intent, mConnection, 0, |
| UserHandle.CURRENT_OR_SELF)) { |
| logError("Could not bind to Bluetooth Service with " + intent); |
| return false; |
| } |
| } catch (SecurityException se) { |
| logError("Failed to bind service. " + se); |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| private void doUnbind() { |
| synchronized (mConnection) { |
| if (mService != null) { |
| logDebug("Unbinding service..."); |
| try { |
| mContext.unbindService(mConnection); |
| } catch (IllegalArgumentException ie) { |
| logError("Unable to unbind service: " + ie); |
| } finally { |
| mService = null; |
| } |
| } |
| } |
| } |
| |
| void connect(Context context, BluetoothProfile.ServiceListener listener) { |
| mContext = context; |
| mServiceListener = listener; |
| IBluetoothManager mgr = BluetoothAdapter.getDefaultAdapter().getBluetoothManager(); |
| if (mgr != null) { |
| try { |
| mgr.registerStateChangeCallback(mBluetoothStateChangeCallback); |
| } catch (RemoteException re) { |
| logError("Failed to register state change callback. " + re); |
| } |
| } |
| doBind(); |
| } |
| |
| void disconnect() { |
| mServiceListener = null; |
| IBluetoothManager mgr = BluetoothAdapter.getDefaultAdapter().getBluetoothManager(); |
| if (mgr != null) { |
| try { |
| mgr.unregisterStateChangeCallback(mBluetoothStateChangeCallback); |
| } catch (RemoteException re) { |
| logError("Failed to unregister state change callback" + re); |
| } |
| } |
| doUnbind(); |
| } |
| |
| T getService() { |
| return mService; |
| } |
| |
| /** |
| * This abstract function is used to implement method to get the |
| * connected Bluetooth service interface. |
| * @param service the connected binder service. |
| * @return T the binder interface of {@code service}. |
| * @hide |
| */ |
| public abstract T getServiceInterface(IBinder service); |
| |
| private void logDebug(String log) { |
| Log.d(mProfileName, log); |
| } |
| |
| private void logError(String log) { |
| Log.e(mProfileName, log); |
| } |
| } |