单击按钮进行录制和播放

Question

我有一个播放声音的代码，录制音频（通过单击一个按钮）并播放录制的文件（通过单击另一个按钮）。我想知道如何修改它以便在我点击第一个按钮时录制和播放声音，所以当我点击第二个按钮时我可以听到我先播放的录制声音。

这意味着：我想知道如何开始录制并在录制文件夹中播放我的音频文件，只需单击按钮即可。

这是我刚才的代码：

    public class MediaPlayerExample2Activity extends Activity {
private static final String LOG_TAG = "AudioRecordTest";    
private static String mFileName = null;  
private RecordButton mRecordButton = null;    
private MediaRecorder mRecorder = null;    
private PlayButton   mPlayButton = null;    
private MediaPlayer   mPlayer = null;
private void onRecord(boolean start) {       
     if (start) {          
     startRecording();        }
     else {           
     stopRecording();        }    }   
     private void onPlay(boolean start) {       
     if (start) {            
     startPlaying();        } 
     else {           
     stopPlaying();        }    }   
     private void startPlaying() {       
     mPlayer = new MediaPlayer();        
     try {            
     mPlayer.setDataSource(mFileName);           
     mPlayer.prepare();            
     mPlayer.start();        } 
     catch (IOException e) {  
     Log.e(LOG_TAG, "prepare() failed");
     }    }    private void stopPlaying() { 
     mPlayer.release();       
     mPlayer = null;    }   
     private void startRecording() {
     mRecorder = new MediaRecorder();
     mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
     mRecorder.setOutputFile(mFileName);
     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
     try { 
     mRecorder.prepare(); 
     } 
     catch (IOException e) { 
     Log.e(LOG_TAG, "prepare() failed");  
     }        mRecorder.start();   
     }    
     private void stopRecording() { 
     mRecorder.stop();       
     mRecorder.release(); 
     mRecorder = null;    
     }    
     class RecordButton extends Button { 
     boolean mStartRecording = true;  
     OnClickListener clicker = new OnClickListener() { 
     public void onClick(View v) {                
     onRecord(mStartRecording);                
     if (mStartRecording) {                    
     setText("Stop recording");                
     } 
     else { 
     setText("Start recording"); 
     }                
     mStartRecording = !mStartRecording;            }      
     };       
     public RecordButton(Context ctx) { 
     super(ctx);            
     setText("Start recording");
     setOnClickListener(clicker);
     }    }    
     class PlayButton extends Button {
     boolean mStartPlaying = true;
     OnClickListener clicker = new OnClickListener() {
     public void onClick(View v) {                
     onPlay(mStartPlaying);                
     if (mStartPlaying) {                   
     setText("Stop playing");               
     } 
     else {
     setText("Start playing"); 
     }                
     mStartPlaying = !mStartPlaying;           
     }        };        
     public PlayButton(Context ctx) {            
     super(ctx);            
     setText("Start playing");
     setOnClickListener(clicker);
     }    }    
     public MediaPlayerExample2Activity() {
     mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
     mFileName += "/audiorecordtest.3gp";    
     }
@Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);

MediaPlayer mPlayer = MediaPlayer.create(this, R.raw.pru);
 mPlayer.start();

 LinearLayout ll = new LinearLayout(this);  
 mRecordButton = new RecordButton(this);
 ll.addView(mRecordButton,           
 new LinearLayout.LayoutParams(      
 ViewGroup.LayoutParams.WRAP_CONTENT,
 ViewGroup.LayoutParams.WRAP_CONTENT,
 0));    setContentView(ll);   
 mPlayButton = new PlayButton(this);


 ll.addView(mPlayButton, 
 new LinearLayout.LayoutParams( 
 ViewGroup.LayoutParams.WRAP_CONTENT,
 ViewGroup.LayoutParams.WRAP_CONTENT,
 0));       setContentView(ll);    }

@Override    
 public void onPause() {
     super.onPause();
     if (mRecorder != null) {
     mRecorder.release();
     mRecorder = null; 
     }       
     if (mPlayer != null) {
     mPlayer.release(); 
     mPlayer = null;  
     }    }}

谢谢！我希望你理解我的问题!!! ;）