音樂應用程序的錄音聲音

Question

我正在開發android音樂鋼琴應用程序。在我使用的Soundpool播放音頻，但我怎麼能記錄聲音，使用戶能唱能帶錄製音樂一起錄製自己的歌聲跳動

Answer 1

下面是WO功能中的一個記錄和其他播放

private void startRecord(){ 
     File file = new File(Environment.getExternalStorageDirectory(), "test.pcm"); 

     try { 
     file.createNewFile(); 
     recording=true; 
     OutputStream outputStream = new FileOutputStream(file); 
     BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream); 
     DataOutputStream dataOutputStream = new DataOutputStream(bufferedOutputStream); 

     int minBufferSize = AudioRecord.getMinBufferSize(SmpleRate, 
     AudioFormat.CHANNEL_IN_MONO, 
     AudioFormat.ENCODING_PCM_16BIT); 

     short[] audioData = new short[minBufferSize]; 

     AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, 
       SmpleRate, 
     AudioFormat.CHANNEL_IN_MONO, 
     AudioFormat.ENCODING_PCM_16BIT, 
     minBufferSize); 

     AudioManager audio=(AudioManager)this.getSystemService(Context.AUDIO_SERVICE); 
     audio.setMicrophoneMute(true); 
     //int sessionId=audioRecord.getAudioSessionId(); 
    // NoiseSuppressor.create(sessionId); 
     audioRecord.startRecording(); 

     while(recording){ 
     int numberOfShort = audioRecord.read(audioData, 0, minBufferSize); 
     for(int i = 0; i < numberOfShort; i++){ 
     dataOutputStream.writeShort(audioData[i]); 
     } 
     } 

     audioRecord.stop(); 
     dataOutputStream.close(); 

     } catch (IOException e) { 
     e.printStackTrace(); 
     } 

    } 


void playRecord(){ 

    File file = new File(Environment.getExternalStorageDirectory(), "test.pcm"); 

     int shortSizeInBytes = Short.SIZE/Byte.SIZE; 

    int bufferSizeInBytes = (int)(file.length()/shortSizeInBytes); 
    short[] audioData = new short[bufferSizeInBytes]; 

    try { 
    InputStream inputStream = new FileInputStream(file); 
    BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); 
    DataInputStream dataInputStream = new DataInputStream(bufferedInputStream); 

    int i = 0; 
    while(dataInputStream.available() > 0){ 
    audioData[i] = dataInputStream.readShort(); 
    i++; 
    } 

    dataInputStream.close(); 

    AudioTrack audioTrack = new AudioTrack(
    AudioManager.STREAM_MUSIC, 
    SmpleRate, 
    AudioFormat.CHANNEL_OUT_MONO, 
    AudioFormat.ENCODING_PCM_16BIT, 
    bufferSizeInBytes, 
    AudioTrack.MODE_STREAM); 

    audioTrack.play(); 
    audioTrack.write(audioData, 0, bufferSizeInBytes); 


    } catch (FileNotFoundException e) { 
    e.printStackTrace(); 
    } catch (IOException e) { 
    e.printStackTrace(); 
    } 
}