BeepManager.java
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/*
* Copyright (C) 2010 ZXing authors
*
* 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 com.yzq.zxinglibrary.android;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Vibrator;
import android.util.Log;
import com.huaheng.wms.R;
import java.io.Closeable;
import java.io.IOException;
/**
* 管理声音和震动
*/
public final class BeepManager implements MediaPlayer.OnCompletionListener,
MediaPlayer.OnErrorListener, Closeable {
private static final String TAG = BeepManager.class.getSimpleName();
private static final float BEEP_VOLUME = 0.10f;
private static final long VIBRATE_DURATION = 200L;
private final Activity activity;
private MediaPlayer mediaPlayer;
private boolean playBeep;
private boolean vibrate;
public BeepManager(Activity activity) {
this.activity = activity;
this.mediaPlayer = null;
updatePrefs();
}
public void setPlayBeep(boolean playBeep) {
this.playBeep = playBeep;
}
public void setVibrate(boolean vibrate) {
this.vibrate = vibrate;
}
public synchronized void updatePrefs() {
if (playBeep && mediaPlayer == null) {
// The volume on STREAM_SYSTEM is not adjustable, and users found it
// too loud,
// so we now play on the music stream.
// 设置activity音量控制键控制的音频流
activity.setVolumeControlStream(AudioManager.STREAM_MUSIC);
mediaPlayer = buildMediaPlayer(activity);
}
}
/**
* 开启响铃和震动
*/
@SuppressLint("MissingPermission")
public synchronized void playBeepSoundAndVibrate() {
if (playBeep && mediaPlayer != null) {
mediaPlayer.start();
}
if (vibrate) {
Vibrator vibrator = (Vibrator) activity
.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(VIBRATE_DURATION);
}
}
/**
* 创建MediaPlayer
*
* @param activity
* @return
*/
private MediaPlayer buildMediaPlayer(Context activity) {
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
// 监听是否播放完成
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
// 配置播放资源
try {
AssetFileDescriptor file = activity.getResources()
.openRawResourceFd(R.raw.beep);
try {
mediaPlayer.setDataSource(file.getFileDescriptor(),
file.getStartOffset(), file.getLength());
} finally {
file.close();
}
// 设置音量
mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
mediaPlayer.prepare();
return mediaPlayer;
} catch (IOException ioe) {
Log.w(TAG, ioe);
mediaPlayer.release();
return null;
}
}
@Override
public void onCompletion(MediaPlayer mp) {
// When the beep has finished playing, rewind to queue up another one.
mp.seekTo(0);
}
@Override
public synchronized boolean onError(MediaPlayer mp, int what, int extra) {
if (what == MediaPlayer.MEDIA_ERROR_SERVER_DIED) {
// we are finished, so put up an appropriate error toast if required
// and finish
activity.finish();
} else {
// possibly media player error, so release and recreate
mp.release();
mediaPlayer = null;
updatePrefs();
}
return true;
}
@Override
public synchronized void close() {
if (mediaPlayer != null) {
mediaPlayer.release();
mediaPlayer = null;
}
}
}