下面列出了android.media.AudioTrack#STATE_UNINITIALIZED 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@Override
public void stop() {
getAudioTrackCurrentPosition();
mCurrentState = PlayState.STOPPED;
if (writeWorkThread != null) {
writeWorkThread.stopWrite();
}
try {
Log.d(TAG, "stop-PlayState:" + mAudioTrack.getPlayState());
if (mAudioTrack != null && mAudioTrack.getPlayState() != AudioTrack.STATE_UNINITIALIZED) {
mAudioTrack.pause();
mAudioTrack.flush();
Log.d(TAG, "stop-ok");
}
} catch (Exception e) {
e.printStackTrace();
Log.d(TAG, "stop()", e);
}
fireStopped();
}
@Override
public void release() {
mCurrentState = PlayState.IDLE;
if (writeWorkThread != null) {
writeWorkThread.stopWrite();
}
try {
Log.d(TAG, "release-PlayState:" + mAudioTrack.getPlayState());
if (mAudioTrack != null && mAudioTrack.getPlayState() != AudioTrack.STATE_UNINITIALIZED) {
mAudioTrack.pause();
mAudioTrack.flush();
mAudioTrack.stop();
mAudioTrack.release();
Log.d(TAG, "release-ok");
}
} catch (Exception e) {
e.printStackTrace();
Log.d(TAG, "release()", e);
}
fireOnRelease();
mediaPlayerListeners.clear();
handlerMain.removeCallbacksAndMessages(null);
}
public boolean startPlayer(int streamType, int sampleRateInHz, int channelConfig, int audioFormat) {
if (mIsPlayStarted) {
Log.e(TAG, "Player already started !");
return false;
}
mMinBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz,channelConfig,audioFormat);
if (mMinBufferSize == AudioTrack.ERROR_BAD_VALUE) {
Log.e(TAG, "Invalid parameter !");
return false;
}
Log.d(TAG , "getMinBufferSize = "+mMinBufferSize+" bytes !");
mAudioTrack = new AudioTrack(streamType,sampleRateInHz,channelConfig,audioFormat,mMinBufferSize,DEFAULT_PLAY_MODE);
if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED) {
Log.e(TAG, "AudioTrack initialize fail !");
return false;
}
mIsPlayStarted = true;
Log.d(TAG, "Start audio player success !");
return true;
}
/**
* Play the given InputStream. The stream must be a PCM audio format with a sample rate of 22050.
*
* @param stream the stream derived from a PCM audio source
*/
public void playStream(InputStream stream) {
try {
byte[] data = convertStreamToByteArray(stream);
int headSize = 44, metaDataSize = 48;
int destPos = headSize + metaDataSize;
int rawLength = data.length - destPos;
byte[] d = new byte[rawLength];
System.arraycopy(data, destPos, d, 0, rawLength);
initPlayer(DEFAULT_SAMPLE_RATE);
audioTrack.write(d, 0, d.length);
stream.close();
if (audioTrack != null && audioTrack.getState() != AudioTrack.STATE_UNINITIALIZED) {
audioTrack.release();
}
} catch (IOException e2) {
Log.e(TAG, e2.getMessage());
}
}
/**
* Play the given InputStream. The stream must be a PCM audio format.
*
* @param stream the stream derived from a PCM audio source
* @param sampleRate the sample rate for the provided stream
*/
public void playStream(InputStream stream, int sampleRate) {
try {
byte[] data = convertStreamToByteArray(stream);
int headSize = 44, metaDataSize = 48;
int destPos = headSize + metaDataSize;
int rawLength = data.length - destPos;
byte[] d = new byte[rawLength];
System.arraycopy(data, destPos, d, 0, rawLength);
initPlayer(sampleRate);
audioTrack.write(d, 0, d.length);
stream.close();
if (audioTrack != null && audioTrack.getState() != AudioTrack.STATE_UNINITIALIZED) {
audioTrack.release();
}
} catch (IOException e2) {
Log.e(TAG, e2.getMessage());
}
}
public boolean startPlayer(int streamType, int sampleRateInHz, int channelConfig, int audioFormat) {
if (mIsPlayStarted) {
Log.e(TAG, "Player already started !");
return false;
}
mMinBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz,channelConfig,audioFormat);
if (mMinBufferSize == AudioTrack.ERROR_BAD_VALUE) {
Log.e(TAG, "Invalid parameter !");
return false;
}
Log.d(TAG , "getMinBufferSize = "+mMinBufferSize+" bytes !");
mAudioTrack = new AudioTrack(streamType,sampleRateInHz,channelConfig,audioFormat,mMinBufferSize,DEFAULT_PLAY_MODE);
if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED) {
Log.e(TAG, "AudioTrack initialize fail !");
return false;
}
mIsPlayStarted = true;
Log.d(TAG, "Start audio player success !");
return true;
}
protected void internal_stop_audio() {
if (DEBUG) Log.v(TAG, "internal_stop_audio:");
if (mAudioTrack != null) {
if (mAudioTrack.getState() != AudioTrack.STATE_UNINITIALIZED)
mAudioTrack.stop();
mAudioTrack.release();
mAudioTrack = null;
}
mAudioOutTempBuf = null;
}
/**
* Stop player
*/
private void stopTtsPlayer() {
if (audioTrack != null && audioTrack.getState() != AudioTrack.STATE_UNINITIALIZED ) {
// IMPORTANT: NOT use stop()
// For an immediate stop, use pause(), followed by flush() to discard audio data that hasn't been played back yet.
audioTrack.pause();
audioTrack.flush();
}
}
@Override
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
HttpResponse post;
try {
post = createPost(server, username, password, token, learningOptOut, content, voice, codec);
InputStream is = post.getEntity().getContent();
byte[] data = null;
if(codec == CODEC_WAV) {
data = analyzeWavData(is);
}
else if(codec == CODEC_OPUS){
data = analyzeOpusData(is);
}
initPlayer();
audioTrack.write(data, 0, data.length);
is.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
Log.i(TAG, "Stopping audioTrack...");
if (audioTrack != null && audioTrack.getState() != AudioTrack.STATE_UNINITIALIZED) {
audioTrack.release();
}
}
}
protected void internalStopAudio() {
if (DEBUG) Log.v(TAG, "internalStopAudio:");
if (mAudioTrack != null) {
if (mAudioTrack.getState() != AudioTrack.STATE_UNINITIALIZED)
mAudioTrack.stop();
mAudioTrack.release();
mAudioTrack = null;
}
mAudioOutTempBuf = null;
}
public void playBuffer(byte[] audioData, int bufferSize) {
if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED)
return;
if (mAudioTrack.write(audioData, 0, bufferSize) != bufferSize) {
Log.w(TAG, "Could not write all the samples to the audio device");
}
mAudioTrack.play();
}