1 /* 2 * Copyright (C) 2020 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.emergency.action.sensoryfeedback; 18 19 import android.content.Context; 20 import android.media.AudioAttributes; 21 import android.media.AudioManager; 22 import android.media.MediaPlayer; 23 import android.provider.Settings; 24 import android.util.Log; 25 26 import com.android.emergency.R; 27 28 29 public class EmergencyActionAlarmHelper { 30 private static final String TAG = "AlarmSoundManager"; 31 private static final int USER_SET_ALARM_VOLUME_UNKNOWN = -1; 32 private final Context mContext; 33 34 private MediaPlayer mMediaPlayer; 35 private AudioManager mAudioManager; 36 private int mUserSetAlarmVolume; 37 private boolean mResetAlarmVolumeNeeded; 38 EmergencyActionAlarmHelper(Context context)39 public EmergencyActionAlarmHelper(Context context) { 40 this(context, USER_SET_ALARM_VOLUME_UNKNOWN); 41 } 42 getUserSetAlarmVolume()43 public int getUserSetAlarmVolume() { 44 return mUserSetAlarmVolume; 45 } 46 EmergencyActionAlarmHelper(Context context, int userSetAlarmVolume)47 public EmergencyActionAlarmHelper(Context context, int userSetAlarmVolume) { 48 mContext = context; 49 mAudioManager = context.getSystemService(AudioManager.class); 50 mUserSetAlarmVolume = userSetAlarmVolume; 51 } 52 playWarningSound()53 public void playWarningSound() { 54 if (!isPlayWarningSoundEnabled()) { 55 return; 56 } 57 58 if (mMediaPlayer == null) { 59 mMediaPlayer = MediaPlayer.create( 60 mContext, 61 R.raw.alarm, 62 new AudioAttributes.Builder() 63 .setUsage(AudioAttributes.USAGE_ALARM) 64 .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION) 65 .build(), 66 /* audioSessionId= */ 0); 67 } 68 69 mMediaPlayer.setOnCompletionListener(mp -> mp.release()); 70 mMediaPlayer.setOnErrorListener( 71 (MediaPlayer mp, int what, int extra) -> { 72 Log.w(TAG, "MediaPlayer playback failed with error code: " + what 73 + ", and extra code: " + extra); 74 mp.release(); 75 return false; 76 }); 77 78 setAlarmVolumeToFull(); 79 mMediaPlayer.start(); 80 } 81 stopWarningSound()82 public void stopWarningSound() { 83 if (mMediaPlayer != null) { 84 try { 85 mMediaPlayer.stop(); 86 mMediaPlayer.release(); 87 } catch (IllegalStateException e) { 88 Log.w(TAG, "Exception when trying to stop media player"); 89 } 90 mMediaPlayer = null; 91 } 92 93 resetAlarmVolume(); 94 } 95 setAlarmVolumeToFull()96 private void setAlarmVolumeToFull() { 97 int streamType = AudioManager.STREAM_ALARM; 98 if (mUserSetAlarmVolume == USER_SET_ALARM_VOLUME_UNKNOWN) { 99 mUserSetAlarmVolume = mAudioManager.getStreamVolume(streamType); 100 } 101 mResetAlarmVolumeNeeded = true; 102 103 Log.d(TAG, "Setting alarm volume from " + mUserSetAlarmVolume + "to full"); 104 mAudioManager.setStreamVolume(streamType, 105 mAudioManager.getStreamMaxVolume(streamType), 0); 106 } 107 resetAlarmVolume()108 private void resetAlarmVolume() { 109 if (mResetAlarmVolumeNeeded) { 110 Log.d(TAG, "Resetting alarm volume to back to " + mUserSetAlarmVolume); 111 mAudioManager.setStreamVolume(AudioManager.STREAM_ALARM, mUserSetAlarmVolume, 0); 112 mResetAlarmVolumeNeeded = false; 113 } 114 } 115 isPlayWarningSoundEnabled()116 private boolean isPlayWarningSoundEnabled() { 117 return Settings.Secure.getInt(mContext.getContentResolver(), 118 Settings.Secure.EMERGENCY_GESTURE_SOUND_ENABLED, 0) != 0; 119 } 120 } 121