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      1 /*
      2  * Copyright (C) 2018 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 com.android.systemui.statusbar;
     18 
     19 import android.content.Context;
     20 import android.database.ContentObserver;
     21 import android.media.AudioAttributes;
     22 import android.os.AsyncTask;
     23 import android.os.Handler;
     24 import android.os.UserHandle;
     25 import android.os.VibrationEffect;
     26 import android.os.Vibrator;
     27 import android.provider.Settings;
     28 
     29 public class VibratorHelper {
     30 
     31     private final Vibrator mVibrator;
     32     private final Context mContext;
     33     private boolean mHapticFeedbackEnabled;
     34     private static final AudioAttributes STATUS_BAR_VIBRATION_ATTRIBUTES =
     35             new AudioAttributes.Builder()
     36                     .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
     37                     .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
     38                     .build();
     39 
     40     final private ContentObserver mVibrationObserver = new ContentObserver(Handler.getMain()) {
     41         @Override
     42         public void onChange(boolean selfChange) {
     43             updateHapticFeedBackEnabled();
     44         }
     45     };
     46 
     47     public VibratorHelper(Context context) {
     48         mContext = context;
     49         mVibrator = context.getSystemService(Vibrator.class);
     50 
     51         mContext.getContentResolver().registerContentObserver(
     52                 Settings.System.getUriFor(Settings.System.HAPTIC_FEEDBACK_ENABLED), true,
     53                 mVibrationObserver);
     54         mVibrationObserver.onChange(false /* selfChange */);
     55     }
     56 
     57     public void vibrate(final int effectId) {
     58         if (mHapticFeedbackEnabled) {
     59             AsyncTask.execute(() ->
     60                     mVibrator.vibrate(VibrationEffect.get(effectId, false /* fallback */),
     61                             STATUS_BAR_VIBRATION_ATTRIBUTES));
     62         }
     63     }
     64 
     65     private void updateHapticFeedBackEnabled() {
     66         mHapticFeedbackEnabled = Settings.System.getIntForUser(mContext.getContentResolver(),
     67                 Settings.System.HAPTIC_FEEDBACK_ENABLED, 0, UserHandle.USER_CURRENT) != 0;
     68     }
     69 }
     70