我正在开发一个安卓穿戴应用程序。该应用程序从智能 watch 的麦克风录制本地音频并将其发送到 handle 设备。 handle 设备接收数据并写入 .wav 文件。文件已创建，但是当我听文件为空时，我只能听静音。
这是磨损代码:
public void replyAudioByByte(final byte data[]) {
final String path = "/start_activity";
final Byte[] text= new Byte[1024];
GoogleApiClient client = new GoogleApiClient.Builder(getApplicationContext())
.addApi(Wearable.API)
.build();
new Thread(new Runnable() {
@Override
public void run() {
NodeApi.GetConnectedNodesResult nodes = Wearable.NodeApi.getConnectedNodes(mApiClient).await();
for (Node node : nodes.getNodes()) {
MessageApi.SendMessageResult result = Wearable.MessageApi.sendMessage(
mApiClient, node.getId(),AUDIO_RECORDER, data).await();
if (result.getStatus().isSuccess()) {
Log.d("sendMessage","Message send!!");
for (int j=0; j<data.length; j++ ){
Log.v("Mobile", "Message: {" + data[j] + "} sent to: " + node.getDisplayName());
}
} else {
// Log an error
Log.v("Mobile", "ERROR: failed to send Message");
}
}
}
}).start();
client.disconnect();
Log.d("MOBILE", "send message end");
}
public void startRecordingAudio() {
recorder = findAudioRecord();
Log.d("recorder:","recorder="+recorder.toString());
CountDownTimer countDowntimer = new CountDownTimer(8000, 1000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
try {
//Toast.makeText(getBaseContext(), "Stop recording Automatically ", Toast.LENGTH_LONG).show();
Log.d("wear", "stopRecorder=" + System.currentTimeMillis());
recorder.stop();
Log.d("formato registrazione","recorderformat="+recorder.getAudioFormat()+"-----rate=");
Log.d("formato registrazione","recordersamplerate=" +recorder.getSampleRate());
isRecording=false;
replyAudioByByte(data);
for (int j=0; j< data.length;j++){
Log.d("watch audio registrato", "data[]="+data[j]);
}
Log.d("wear", "recorder.stop ok!");
} catch (Exception e) {
// TODO Auto-generated catch block
Log.e("wear", "recorder.stop catch");
e.printStackTrace();
}
}
};
recorder.startRecording();
countDowntimer.start();
Log.d("wear", "startRecorder=" + System.currentTimeMillis());
isRecording = true;
recordingThread = new Thread(new Runnable() {
public void run() {
while (isRecording ) {
recorder.read(data, 0, bufferSize);
Log.d("WEAR","recorder.read="+recorder.read(data, 0, bufferSize));
}
recorder.stop();
recorder.release();
for (int i = 0; i < bufferSize; i++) {
Log.d("startrecording", "data=" + data[i]);
}
}
}, "AudioRecorder Thread");
recordingThread.start();
int a= recorder.getSampleRate();
Log.d("formato registrazione","recorderformat="+recorder.getAudioFormat()+"-----rate="+a);
Log.d("formato registrazione","recordersamplerate=" +recorder.getSampleRate());
}
public AudioRecord findAudioRecord() {
/** The settings that i must use are not the same for every device, so i try if they work */
for (int rate : mSampleRates) {
for (short audioFormat : audioF) {
for (short channelConfig : channelC) {
try {
//Log.d("Check", "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: " + channelConfig);
int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);
if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
//It checks if it can instantiate the audiorecorder without problems
AudioRecord recorder = new AudioRecord(AudioSource.MIC, rate, channelConfig, audioFormat, bufferSize + 2000);
Log.d("AudioRecorder data","AudioSource.Default="+ AudioSource.MIC);
Log.d("AudioRecorder data","Rate="+ rate);
Log.d("AudioRecorder data","Channel.config="+ channelConfig);
Log.d("AudioRecorder data","AudioFormat= "+audioFormat);
bufferSize=bufferSize+2000;
Log.d("AudioRecorder data","buffersize="+ bufferSize );
if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
Log.d("audiorec","rate="+rate);
return recorder;
}
} catch (Exception e) {
Log.e("Check", rate + "Exception, keep trying.", e);
}
}
}
}
return null;
}
这是句柄代码:
public Void doInBackground(byte [] dataToWrite) {
Log.d("doInBackground","entrato");
byte data[] = new byte[bufferSize];
String tempfilename = "";
FileOutputStream os = null;
//if(allowRecorder){
tempfilename = getTempFilename();
Log.d("doInBackground","getTempFilename=" +tempfilename.toString());
try {
os = new FileOutputStream(tempfilename);
Log.d("doInBackground","os new ok" );
} catch (FileNotFoundException e) {
e.printStackTrace();
}
dbData = new ArrayList<Double>();
Log.d("doInBackGround", "dateToWrite.length=" + dataToWrite.length);
for (int j = 0; j < dataToWrite.length; j++) {
try {
os.write(dataToWrite);
Log.d("os,write", "dataToWrite");
} catch (IOException e) {
e.printStackTrace();
}
}
if(data[data.length-1]!=0){
double Db = 20 * Math.log10(Math.abs((data[data.length-1]/51805.5336) / 0.00002));
dbData.add(Db);
}
try {
os.close();
Log.d("os.close", "dataToWrite");
copyWaveFile(tempfilename,getFilename());
deleteTempFile();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private void copyWaveFile(String inFilename,String outFilename){
FileInputStream in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = 0;
long longSampleRate = 8000;
System.out.println("SAMPLE RATE = "+longSampleRate);
int channels = 12;
audioFormat = 16;
long byteRate = audioFormat * longSampleRate * channels/8;
byte[] data = new byte[bufferSize];
try {
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
totalAudioLen = in.getChannel().size();
totalDataLen = totalAudioLen + 36;
Log.d("RecorderRead","totalAudioLen=" +totalAudioLen);
Log.d("RecorderRead","totalDatalen=" +totalDataLen);
System.out.println("Temp File size: " + totalDataLen);
Log.d("AudioRecorder data","AudioSource.Default="+ AudioSource.DEFAULT);
Log.d("AudioRecorder data","Rate="+ longSampleRate);
Log.d("AudioRecorder data","Channel.config="+ channels);
Log.d("AudioRecorder data","AudioFormat= "+audioFormat);
//bufferSize=bufferSize+2000;
Log.d("AudioRecorder data","buffersize="+ bufferSize );
if(totalDataLen != 36){
writeWaveFileHeader(out, totalAudioLen, totalDataLen,
longSampleRate, channels, byteRate);
Log.d("writeWAVEFILE", "chiamato");
while(in.read(data) != -1){
out.write(data);
}
System.out.println("Wav File size: " + out.getChannel().size());
}
else{
System.out.println("Non creo il file .wav");
}
in.close();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void writeWaveFileHeader(
FileOutputStream out, long totalAudioLen,
long totalDataLen, long longSampleRate, int channels,
long byteRate) throws IOException {
byte[] header = new byte[44];
header[0] = 'R'; // RIFF/WAVE header
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
header[4] = (byte) (totalDataLen & 0xff);
header[5] = (byte) ((totalDataLen >> 8) & 0xff);
header[6] = (byte) ((totalDataLen >> 16) & 0xff);
header[7] = (byte) ((totalDataLen >> 24) & 0xff);
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f'; // 'fmt ' chunk
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
header[16] = 16; // 4 bytes: size of 'fmt ' chunk
header[17] = 0;
header[18] = 0;
header[19] = 0;
header[20] = 1; // format = 1
header[21] = 0;
header[22] = (byte) channels;
header[23] = 0;
header[24] = (byte) (longSampleRate & 0xff);
header[25] = (byte) ((longSampleRate >> 8) & 0xff);
header[26] = (byte) ((longSampleRate >> 16) & 0xff);
header[27] = (byte) ((longSampleRate >> 24) & 0xff);
header[28] = (byte) (byteRate & 0xff);
header[29] = (byte) ((byteRate >> 8) & 0xff);
header[30] = (byte) ((byteRate >> 16) & 0xff);
header[31] = (byte) ((byteRate >> 24) & 0xff);
header[32] = (byte) (2 * 16 / 8); // block align
header[33] = 0;
header[34] = (byte) audioFormat; // bits per sample
header[35] = 0;
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
header[40] = (byte) (totalAudioLen & 0xff);
header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
out.write(header, 0, 44);
}
穿着主要我有
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
在处理 list 中我有
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
当我在磨损应用程序的日志文件中运行应用程序时，出现此错误:
AudioRecord-JNI: Error -4 during AudioRecord native read
我应该怎么做才能解决它？
有人可以帮助我吗？怎么了？每种类型的帮助都表示赞赏，代码或教程。
提前致谢
最佳答案
您需要设置用于录制的音频编码器。void setAudioEncoder (int audio_encoder)
如果不调用此方法，则输出文件将不包含音轨。在 setOutputFormat() 之后调用此电话但在 prepare() 之前.
尝试按照以下列出的步骤进行操作:
MediaRecorder.AudioSource.MIC . 使用 MediaRecorder.setAudioEncoder() 设置音频编码器.
MediaRecorder.release()始终建议立即释放资源。 以下是如何录制音频和播放录制的音频的示例代码:https://developer.android.com/guide/topics/media/audio-capture.html#example
关于android - 从磨损接收数据后写.wav为空，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38433769/