Я попытался создать звуковую дорожку, используя класс AudioRecord с Java на Android.Файл сохраняется в каталог, который я указал с именем и расширением, которое я хочу.Проблема в том, что я не могу воспроизвести записанные файлы.
Вот код;
public class RecordActivity extends AppCompatActivity {
FloatingActionButton recordButton = null;
Chronometer chronometer = null;
boolean isRecording = false;
private int bufferSize = 0;
private AudioRecord recorder = null;
private static final int RECORDER_BPP = 16;
private static final String AUDIO_RECORDER_FILE_EXT_WAV = ".wav";
private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder";
private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw";
private static final int RECORDER_SAMPLERATE = 44100;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_STEREO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private Thread recordingThread = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_record);
recordButton = findViewById(R.id.fabbtn_record);
chronometer = findViewById(R.id.ch_recorder);
recordButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(!isRecording)
{
recordButton.setImageResource(R.drawable.ic_record_stop);
chronometer.start();
isRecording = true;
startRecording();
}
else {
recordButton.setImageResource(R.drawable.ic_record_mic);
chronometer.stop();
chronometer.setBase(SystemClock.elapsedRealtime());
isRecording = false;
stopRecording();
}
}
});
}
private void startRecording(){
bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
recorder = new AudioRecord(
MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE,
RECORDER_CHANNELS,
RECORDER_AUDIO_ENCODING,
bufferSize);
int i = recorder.getState();
if(i == 1)
{
recorder.startRecording();
}
recordingThread = new Thread(new Runnable() {
@Override
public void run() {
writeAudioDataToFile();
}
}, "Record Thread");
recordingThread.start();
}
private void stopRecording(){
if (null != recorder)
{
int i = recorder.getState();
if (i == 1) {
recorder.stop();
}
recorder.release();
recorder = null;
recordingThread = null;
}
copyWaveFile(getTempFileName(), getFileName());
deleteTempFile();
}
private void writeAudioDataToFile(){
byte[] data = new byte[bufferSize];
String fileName = getTempFileName();
FileOutputStream os = null;
try
{
os = new FileOutputStream(fileName);
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
int read = 0;
if (null != os)
{
while (isRecording)
{
read = recorder.read(data, 0, bufferSize);
if (AudioRecord.ERROR_INVALID_OPERATION != read)
{
try
{
os.write(data);
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
try
{
os.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
private void copyWaveFile(String inFilename, String outFilename){
FileInputStream in = null;
FileOutputStream out = null;
long totalAudioLen = 0;
long totalDataLen = totalAudioLen + 36;
long longSampleRate = RECORDER_SAMPLERATE;
int channels = 2;
long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8;
byte[] data = new byte[bufferSize];
try
{
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
totalAudioLen = in.getChannel().size();
totalDataLen = totalAudioLen + 36;
while (in.read(data) != -1) {
out.write(data);
}
in.close();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String getTempFileName(){
String filePath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filePath, AUDIO_RECORDER_FOLDER);
if(!file.exists()){
file.mkdirs();
}
File tempFile = new File(filePath, AUDIO_RECORDER_TEMP_FILE);
if (tempFile.exists()){
tempFile.delete();
}
return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE);
}
private String getFileName(){
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
if (!file.exists()) {
file.mkdirs();
}
return (file.getAbsolutePath() + "/" + System.currentTimeMillis() + AUDIO_RECORDER_FILE_EXT_WAV);
}
private void deleteTempFile() {
File file = new File(getTempFileName());
file.delete();
}
Извините за длину кода, потому что я очень плохо знаком с программированием на Android,поэтому я не уверен, где это будет важно для вас.