在Android中捕獲音頻或提供對麥克風的訪問

Question

我嘗試使用MediaRecorder來捕獲音頻。正如我所看到的MediaRecorder只輸出文件。我們是否輸出音頻流或可能有權訪問麥克風與任何庫？

P.S.對不起我的英語不好。

Answer 1

看看這裏： record audio in android

public class SoundRecordingActivity extends Activity { 

    MediaRecorder recorder; 
    File audiofile = null; 
    private static final String TAG = "SoundRecordingActivity"; 
    private View startButton; 
    private View stopButton; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    startButton = findViewById(R.id.start); 
    stopButton = findViewById(R.id.stop); 
    } 

    public void startRecording(View view) throws IOException { 

    startButton.setEnabled(false); 
    stopButton.setEnabled(true); 

    File sampleDir = Environment.getExternalStorageDirectory(); 
    try { 
     audiofile = File.createTempFile("sound", ".3gp", sampleDir); 
    } catch (IOException e) { 
     Log.e(TAG, "sdcard access error"); 
     return; 
    } 
    recorder = new MediaRecorder(); 
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
    recorder.setOutputFile(audiofile.getAbsolutePath()); 
    recorder.prepare(); 
    recorder.start(); 
    } 

    public void stopRecording(View view) { 
    startButton.setEnabled(true); 
    stopButton.setEnabled(false); 
    recorder.stop(); 
    recorder.release(); 
    addRecordingToMediaLibrary(); 
    } 

    protected void addRecordingToMediaLibrary() { 
    ContentValues values = new ContentValues(4); 
    long current = System.currentTimeMillis(); 
    values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName()); 
    values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current/1000)); 
    values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp"); 
    values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath()); 
    ContentResolver contentResolver = getContentResolver(); 

    Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; 
    Uri newUri = contentResolver.insert(base, values); 

    sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri)); 
    Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show(); 
    } 
}