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需要一些幫助，因爲我無法獲得一個樣本工作（檢查所有其他問題，並搜索了我的屁股，也嘗試了我找到的所有解決方案）。我想我已經犯了一個或多個邏輯錯誤（和代碼中的一些錯誤）。Android AudioRecord/AudioTrack：從緩衝區播放錄音
public class MainActivity extends ActionBarActivity {
private static final String TAG = MainActivity.class.getName();
private AudioTrack track = null;
private static final int SAMPLERATE = 8000;
private static final int TRACK_CHANNELS = AudioFormat.CHANNEL_OUT_MONO;
private static final int AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
byte[] buffer;
private Thread myThread;
private boolean isRunning = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setButtonHandlers();
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording,false);
}
private void enableButton(int id,boolean isEnable){
((Button)findViewById(id)).setEnabled(isEnable);
}
private void setButtonHandlers() {
((Button)findViewById(R.id.btnStartRecording)).setOnClickListener(btnClick);
((Button)findViewById(R.id.btnStopRecording)).setOnClickListener(btnClick);
}
private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btnStartRecording:{
isRunning = true;
runThread(isRunning);
enableButton(R.id.btnStartRecording,false);
enableButton(R.id.btnStopRecording, true);
break;
}
case R.id.btnStopRecording:{
isRunning = false;
runThread(isRunning);
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording, false);
break;
}
}
}
};
private void runThread(final boolean flag){
myThread = new Thread(new Runnable() {
@Override
public void run() {
runRunnable(flag);
}
});
myThread.start();
}
public AudioTrack findAudioTrack (AudioTrack track) {
int myBufferSize = AudioTrack.getMinBufferSize(SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING);
track = new AudioTrack(AudioManager.STREAM_MUSIC, SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING, myBufferSize, AudioTrack.MODE_STREAM);
return track;
}
public void runRunnable(boolean isRunning){
if (isRunning == false) {
if (AudioRecord.STATE_INITIALIZED == recorder.getState()) {
recorder.stop();
recorder.release();
}
if (AudioTrack.STATE_INITIALIZED == track.getState()) {
track.stop();
track.release();
}
return;
}
recorder = findAudioRecord();
track = findAudioTrack(track);
if ((AudioRecord.STATE_INITIALIZED == recorder.getState()) && (AudioTrack.STATE_INITIALIZED == track.getState())) {
recorder.startRecording();
recorder.stop();
recorder.read(buffer, 0, buffer.length);
track.play();
track.write(buffer, 0, buffer.length);
for (int i = 0; i <minBufferSize; i++) {
Log.d(TAG,"data " + i + " content : " + buffer[i]);
}
}
return;
}
private static int[] mSampleRates = new int[] { 8000, 11025, 22050, 44100 };
public AudioRecord findAudioRecord() {
for (int rate : mSampleRates) {
for (short audioFormat : new short[] { AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT }) {
for (short channelConfig : new short[] { AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO }) {
try {
int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);
if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, rate, channelConfig, audioFormat, bufferSize);
if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
return recorder;
}
} catch (Exception e) {
Log.e(TAG, rate + "Exception, keep trying.",e);
}
}
}
}
return null;
}
}
沒有任何人知道，爲什麼沒有在緩衝裏面寫能向我解釋？
我昨天調整了一些代碼，並在緩衝區內獲得了一些值，但今天再次搞砸了代碼。昨天仍然沒有播放。
非常感謝您的幫助！
編輯：
好涼千恩萬謝：>讀現在似乎正常工作。
你是什麼意思是由isRunning作爲靜態成員？變量？
public class MainActivity extends ActionBarActivity {
private static final String TAG = MainActivity.class.getName();
private AudioRecord recorder = null;
private AudioTrack track = null;
private static final int SAMPLERATE = 8000; // 44100
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO; // stereo
private static final int TRACK_CHANNELS = AudioFormat.CHANNEL_OUT_MONO; // stereo
private static final int AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private int minBufferSize;
byte[] buffer;
private Thread myThread;
private boolean isRunning = false;
private AudioManager manager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setButtonHandlers();
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording,false);
minBufferSize = AudioRecord.getMinBufferSize(SAMPLERATE,RECORDER_CHANNELS,AUDIO_ENCODING);
buffer = new byte[minBufferSize];
manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
manager.setMode(AudioManager.MODE_NORMAL);
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
}
private void enableButton(int id,boolean isEnable){
((Button)findViewById(id)).setEnabled(isEnable);
}
private void setButtonHandlers() {
((Button)findViewById(R.id.btnStartRecording)).setOnClickListener(btnClick);
((Button)findViewById(R.id.btnStopRecording)).setOnClickListener(btnClick);
}
private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btnStartRecording:{
isRunning = true;
runThread(isRunning);
enableButton(R.id.btnStartRecording,false);
enableButton(R.id.btnStopRecording, true);
break;
}
case R.id.btnStopRecording:{
isRunning = false;
runThread(isRunning);
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording, false);
break;
}
}
}
};
private void runThread(final boolean flag){
myThread = new Thread(new Runnable() {
@Override
public void run() {
runRunnable(flag);
}
});
myThread.start();
}
public AudioTrack findAudioTrack (AudioTrack track) {
int myBufferSize = AudioTrack.getMinBufferSize(SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING);
if (myBufferSize != AudioTrack.ERROR_BAD_VALUE) {
track = new AudioTrack(AudioManager.STREAM_MUSIC, SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING, myBufferSize, AudioTrack.MODE_STREAM);
if (track.getState() == AudioTrack.STATE_UNINITIALIZED) {
Log.e(TAG, "AudioTrack Uninit");
return null;
}
}
return track;
}
public void runRunnable(boolean isRunning){
if (isRunning == false) {
for (int i = 0; i <minBufferSize; i++) {
Log.d(TAG,"data " + i + " content : " + buffer[i]);
}
if (AudioRecord.STATE_INITIALIZED == recorder.getState()) {
recorder.stop();
recorder.release();
}
if (track != null && AudioTrack.STATE_INITIALIZED == track.getState()) {
if (track.getPlayState() != AudioTrack.PLAYSTATE_STOPPED) {
try{
track.stop();
}catch (IllegalStateException e)
{
e.printStackTrace();
}
}
track.release();
manager.setMode(AudioManager.MODE_NORMAL);
}
return;
}
recorder = findAudioRecord();
if (recorder == null) {
Log.e(TAG, "findAudioRecord error");
return;
}
track = findAudioTrack(track);
if (track == null) {
Log.e(TAG, "findAudioTrack error");
return;
}
track.setPlaybackRate(SAMPLERATE);
if ((AudioRecord.STATE_INITIALIZED == recorder.getState()) && (AudioTrack.STATE_INITIALIZED == track.getState())) {
recorder.startRecording();
track.play();
while (isRunning) {
recorder.read(buffer, 0, minBufferSize);
track.write(buffer, 0, buffer.length);
}
} else {
Log.d(TAG, "Init for Recorder and Track failed");
return;
}
return;
}
private static int[] mSampleRates = new int[] { 8000, 11025, 22050, 44100 };
public AudioRecord findAudioRecord() {
for (int rate : mSampleRates) {
for (short audioFormat : new short[] { AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT }) {
for (short channelConfig : new short[] { AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO }) {
try {
Log.d(TAG, "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: "
+ channelConfig);
int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);
if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
Log.d(TAG, "Found rate " + rate + "Hz, bits: " + audioFormat + ", channel: "
+ channelConfig);
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, rate, channelConfig, audioFormat, bufferSize);
if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
return recorder;
}
} catch (Exception e) {
Log.e(TAG, rate + "Exception, keep trying.",e);
}
}
}
}
return null;
}
}
在audiotrack修復工作，因爲我得到一個「無法檢索AudioTrack指針寫入（）」錯誤。
編輯2：
對不起我的答案花了這麼長時間。 所以謝謝第二個緩衝區很好！ 如果有人有興趣的代碼（僅適用於Nexus 5測試，但工作真棒那裏）：
public class MainActivity extends ActionBarActivity {
private AudioRecord recorder = null;
private AudioTrack track = null;
private static final int SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int TRACK_CHANNELS = AudioFormat.CHANNEL_OUT_MONO;
private static final int AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private int minBufferSizeRec;
short[] bufferRec;
private Thread myThread;
private boolean isRunning = false;
private AudioManager manager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setButtonHandlers();
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording,false);
minBufferSizeRec = AudioRecord.getMinBufferSize(SAMPLERATE,RECORDER_CHANNELS,AUDIO_ENCODING);
bufferRec = new short[minBufferSizeRec/2];
manager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
manager.setMode(AudioManager.MODE_NORMAL);
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
}
private void enableButton(int id,boolean isEnable){
((Button)findViewById(id)).setEnabled(isEnable);
}
private void setButtonHandlers() {
((Button)findViewById(R.id.btnStartRecording)).setOnClickListener(btnClick);
((Button)findViewById(R.id.btnStopRecording)).setOnClickListener(btnClick);
}
private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btnStartRecording:{
isRunning = true;
runThread(isRunning);
enableButton(R.id.btnStartRecording,false);
enableButton(R.id.btnStopRecording, true);
break;
}
case R.id.btnStopRecording:{
isRunning = false;
runThread(isRunning);
enableButton(R.id.btnStartRecording,true);
enableButton(R.id.btnStopRecording, false);
break;
}
}
}
};
private void runThread(final boolean flag){
myThread = new Thread(new Runnable() {
@Override
public void run() {
runRunnable(flag);
}
});
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
myThread.start();
}
public AudioTrack findAudioTrack (AudioTrack track) {
int myBufferSize = AudioTrack.getMinBufferSize(SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING);
if (myBufferSize != AudioTrack.ERROR_BAD_VALUE) {
track = new AudioTrack(AudioManager.STREAM_MUSIC, SAMPLERATE, TRACK_CHANNELS, AUDIO_ENCODING, myBufferSize, AudioTrack.MODE_STREAM);
track.setPlaybackRate(SAMPLERATE);
if (track.getState() == AudioTrack.STATE_UNINITIALIZED) {
Log.e(TAG, "AudioTrack Uninitialized");
return null;
}
}
return track;
}
public void runRunnable(boolean isRunning){
if (isRunning == false) {
if (AudioRecord.STATE_INITIALIZED == recorder.getState()) {
recorder.stop();
recorder.release();
}
if (track != null && AudioTrack.STATE_INITIALIZED == track.getState()) {
if (track.getPlayState() != AudioTrack.PLAYSTATE_STOPPED) {
try{
track.stop();
}catch (IllegalStateException e)
{
e.printStackTrace();
}
}
track.release();
manager.setMode(AudioManager.MODE_NORMAL);
}
return;
} else if (isRunning == true) {
recorder = findAudioRecord();
if (recorder == null) {
Log.e(TAG, "findAudioRecord error");
return;
}
track = findAudioTrack(track);
if (track == null) {
Log.e(TAG, "findAudioTrack error");
return;
}
track.setPlaybackRate(SAMPLERATE);
if ((AudioRecord.STATE_INITIALIZED == recorder.getState()) && (AudioTrack.STATE_INITIALIZED == track.getState())) {
short[] data = new short[minBufferSizeRec/2];
recorder.startRecording();
track.play();
while (isRunning) {
recorder.read(bufferRec, 0, (minBufferSizeRec/2));
for (int i = 0; i < data.length; i++) {
data[i] = bufferRec[i];
}
track.write(data, 0, data.length);
bufferRec = new short[minBufferSizeRec/2];
data = new short[minBufferSizeRec/2];
}
} else {
Log.d(TAG, "Init for Recorder and Track failed");
return;
}
return;
}
myThread.interrupt();
}
private static int[] mSampleRates = new int[] { 8000, 11025, 22050, 44100 };
public AudioRecord findAudioRecord() {
for (int rate : mSampleRates) {
for (short audioFormat : new short[] { AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT }) {
for (short channelConfig : new short[] { AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO }) {
try {
int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);
if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, rate, channelConfig, audioFormat, bufferSize);
if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
return recorder;
}
} catch (Exception e) {
Log.e(TAG, rate + "Exception, keep trying.",e);
}
}
}
}
return null;
}
}
你爲什麼要停止錄製！ –