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 
SystemVibrator()34     public SystemVibrator() {
35         mService = IVibratorService.Stub.asInterface(ServiceManager.getService("vibrator"));
36     }
37 
SystemVibrator(Context context)38     public SystemVibrator(Context context) {
39         super(context);
40         mService = IVibratorService.Stub.asInterface(ServiceManager.getService("vibrator"));
41     }
42 
43     @Override
hasVibrator()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
hasAmplitudeControl()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
vibrate(int uid, String opPkg, VibrationEffect effect, AudioAttributes attributes)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 
usageForAttributes(AudioAttributes attributes)83     private static int usageForAttributes(AudioAttributes attributes) {
84         return attributes != null ? attributes.getUsage() : AudioAttributes.USAGE_UNKNOWN;
85     }
86 
87     @Override
cancel()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