Question

您好我尝试使用AudioRecord类通过MIC录制音频并将其存储在2048大小的缓冲区中。

我尝试使用AudioTrack类从该缓冲区本身播放录制的音频，创建另一个相同大小的缓冲区。当我运行应用程序时，它显示我的main.xml文件，它显示“遗憾的应用已停止”。它没有记录任何东西。我只是想从录音缓冲区本身播放音频。谁能帮我吗？这是我的代码。

public class Main extends Activity {

class AudRecord
{
    public AudioRecord recorder; 
    public boolean isRecording;
    public int SAMPLERATE;
    public int CHANNELS;
    public int AUDIO_FORMAT;
    public int buffer; 
    public Thread recordingThread;

    public AudRecord()
    {
        recorder = null;
        isRecording = false;
        SAMPLERATE = 44100;
        CHANNELS = AudioFormat.CHANNEL_IN_MONO;
        AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
        recordingThread = null;
        buffer = 2048;
    }
    public void StartRecording() {


        recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLERATE,
                CHANNELS, AUDIO_FORMAT, buffer);

        recorder.startRecording();
        isRecording = true;

        recordingThread = new Thread(new Runnable()

        {
            public void run() {
                writeAudioData();
            }

        });
        recordingThread.start();

    }



     void writeAudioData() {


        byte data[] = new byte[2048];

        while (isRecording) {

            recorder.read(data, 0, buffer);
            send(data);

        }
    }

    public void send(byte[] data) {

        int buffers = 2048;
        AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 44100,
                AudioFormat.CHANNEL_OUT_MONO,
                AudioFormat.ENCODING_PCM_16BIT, buffers,
                AudioTrack.MODE_STREAM);

        at.play();
        at.write(data, 0, buffers);
        at.stop();
        at.release();

    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    AudRecord rec= new AudRecord();
    rec.StartRecording();

}

}

Answer 1

遗憾的是，应用已停止这意味着您的XML文件存在问题。

AudioRecording使用MediaRecorder

的示例

public class MainActivity extends Activity {

 MediaRecorder recorder = new MediaRecorder();
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  ((Button) findViewById(R.id.btnStart)).setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        start();
    }
    });
 ((Button) findViewById(R.id.btnStop)).setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        stop();
    }
    });
    }
    public void start()
    {
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setOutputFile(Environment.getExternalStorageDirectory().getAbsolutePath()+"yourfilename.3gpp");
        recorder.prepare();
        recorder.start();
    }
    public void stop()
    {
        recorder.stop();
        recorder.reset();
        recorder.release();
    }
}

使用AudioRecord类录音并使用AudioTrack类播放

1 个答案: