前天想找个蓝牙录音程序,发现竟然没有!没办法,就本身动手DIY了。一些关键代码摘出来,但愿对你们有用。
本代码基于android 2.2以上。IOS就不要问我了,不越狱的IOS设备,蓝牙除了用蓝牙耳机,再就是IOS设备之间联机游戏,不可理喻!
1、初始化
添加权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.BROADCAST_STICKY" />
......
private static String mFileName = null;
private MediaRecorder mRecorder = null;
private MediaPlayer mPlayer = null;
private AudioManager mAudioManager = null;
......
mAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
......
2、录音
private void startRecording() {
//得到文件保存路径。记得添加android.permission.WRITE_EXTERNAL_STORAGE权限
mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
mFileName += "/btrecorder.3gp";
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(mFileName);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();//若是文件打开失败,此步将会出错。
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
if(!mAudioManager.isBluetoothScoAvailableOffCall()){
Log.d(LOG_TAG, "系统不支持蓝牙录音");
return;
}
//蓝牙录音的关键,启动SCO链接,耳机话筒才起做用
mAudioManager.startBluetoothSco();
//蓝牙SCO链接创建须要时间,链接创建后会发出ACTION_SCO_AUDIO_STATE_CHANGED消息,经过接收该消息而进入后续逻辑。
//也有可能此时SCO已经创建,则不会收到上述消息,能够startBluetoothSco()前先stopBluetoothSco()
registerReceiver(new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int state = intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1);
if (AudioManager.SCO_AUDIO_STATE_CONNECTED == state) {
mAudioManager.setBluetoothScoOn(true); //打开SCO
mRecorder.start();//开始录音
unregisterReceiver(this); //别遗漏
}else{//等待一秒后再尝试启动SCO
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
mAudioManager.startBluetoothSco();
}
}
}, new IntentFilter(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED));
}
3、中止录音
private void stopRecording() {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
if(mAudioManager.isBluetoothScoOn()){
mAudioManager.setBluetoothScoOn(false);
mAudioManager.stopBluetoothSco();
}
}
4、播放录音到A2DP
private void startPlaying() {
mPlayer = new MediaPlayer();
try {
if(!mAudioManager.isBluetoothA2dpOn()) mAudioManager.setBluetoothA2dpOn(true); //若是A2DP没创建,则创建A2DP链接
mAudioManager.stopBluetoothSco();//若是SCO没有断开,因为SCO优先级高于A2DP,A2DP可能无声音
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
mAudioManager.setStreamSolo(AudioManager.STREAM_MUSIC, true);
//让声音路由到蓝牙A2DP。此方法虽已弃用,但就它比较直接、好用。
mAudioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_BLUETOOTH_A2DP, AudioManager.ROUTE_BLUETOOTH);
mPlayer.setDataSource(mFileName);
mPlayer.prepare();
mPlayer.start();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
}
5、中止A2DP播放
private void stopPlaying() {
mPlayer.release();
mPlayer = null;
mAudioManager.setStreamSolo(AudioManager.STREAM_MUSIC, false);
} android
总之记住以下的:ide
1)要使用蓝牙耳机的mic,则操做SCO这玩意。this
2)若是要将音频输入到蓝牙耳机,则使用A2DP,(好比说打电话,语音播放呀什么的)这个玩意。spa
3)记住,SCO这个权限比A2DP的高。若是在进行操做。code