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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.os;
     18 
     19 import android.content.Context;
     20 import android.media.AudioAttributes;
     21 import android.util.Log;
     22 
     23 /**
     24  * Vibrator implementation that controls the main system vibrator.
     25  *
     26  * @hide
     27  */
     28 public class SystemVibrator extends Vibrator {
     29     private static final String TAG = "Vibrator";
     30 
     31     private final IVibratorService mService;
     32     private final Binder mToken = new Binder();
     33 
     34     public SystemVibrator() {
     35         mService = IVibratorService.Stub.asInterface(ServiceManager.getService("vibrator"));
     36     }
     37 
     38     public SystemVibrator(Context context) {
     39         super(context);
     40         mService = IVibratorService.Stub.asInterface(ServiceManager.getService("vibrator"));
     41     }
     42 
     43     @Override
     44     public boolean hasVibrator() {
     45         if (mService == null) {
     46             Log.w(TAG, "Failed to vibrate; no vibrator service.");
     47             return false;
     48         }
     49         try {
     50             return mService.hasVibrator();
     51         } catch (RemoteException e) {
     52         }
     53         return false;
     54     }
     55 
     56     @Override
     57     public boolean hasAmplitudeControl() {
     58         if (mService == null) {
     59             Log.w(TAG, "Failed to check amplitude control; no vibrator service.");
     60             return false;
     61         }
     62         try {
     63             return mService.hasAmplitudeControl();
     64         } catch (RemoteException e) {
     65         }
     66         return false;
     67     }
     68 
     69     @Override
     70     public void vibrate(int uid, String opPkg,
     71             VibrationEffect effect, AudioAttributes attributes) {
     72         if (mService == null) {
     73             Log.w(TAG, "Failed to vibrate; no vibrator service.");
     74             return;
     75         }
     76         try {
     77             mService.vibrate(uid, opPkg, effect, usageForAttributes(attributes), mToken);
     78         } catch (RemoteException e) {
     79             Log.w(TAG, "Failed to vibrate.", e);
     80         }
     81     }
     82 
     83     private static int usageForAttributes(AudioAttributes attributes) {
     84         return attributes != null ? attributes.getUsage() : AudioAttributes.USAGE_UNKNOWN;
     85     }
     86 
     87     @Override
     88     public void cancel() {
     89         if (mService == null) {
     90             return;
     91         }
     92         try {
     93             mService.cancelVibrate(mToken);
     94         } catch (RemoteException e) {
     95             Log.w(TAG, "Failed to cancel vibration.", e);
     96         }
     97     }
     98 }
     99