一个基于GoogleAndroid平台的录音机代码

package mjf.record; import java.io.File; import java.io.IOException; import android.app.Activity; import android.media.AudioManager; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.view.View; import android.widget.Button; import android.media.MediaRecorder; public class SimpleRecorder extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button btnStart = (Button) findViewById(R.id.btn_start); Button btnStop = (Button) findViewById(R.id.btn_stop); Button btnPause = (Button) findViewById(R.id.btn_pause); Button btnResume = (Button) findViewById(R.id.btn_resume); // mRecorder = new MediaRecorder(); btnStart.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { onRestartRecording(); } }); btnStop.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { onStopRecording(); } }); btnPause.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { onPauseRecording(); } }); btnResume.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { onResumeRecording(); } }); } private File mSampleFile; private MediaRecorder mRecorder; private void initRecorder() { Log.v("AP","setAudioSource:2"); mRecorder.setAudioSource(/*MediaRecorder.AudioSource.MIC*/2); Log.v("AP","setOutputFormat:4"); mRecorder.setOutputFormat(/*MediaRecorder.OutputFormat.RAW_AMR*/4); Log.v("AP","setAudioEncoder:2"); mRecorder.setAudioEncoder(/*MediaRecorder.AudioEncoder.AMR_NB*/2); mSampleFile = null; try { mSampleFile = File.createTempFile("record", ".wav", Environment .getExternalStorageDirectory()); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } // AudioManager am; mRecorder.setOutputFile(mSampleFile.getAbsolutePath()); try { mRecorder.prepare(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } private void onRestartRecording() { // when plan comes to interrupt activity Log.i("Start Rec", "MessageManager"); mRecorder = new MediaRecorder(); initRecorder(); mRecorder.start(); } private void onStopRecording() { Log.i("stop rec", "MessageManager"); if (mRecorder != null) { mRecorder.stop(); mRecorder.release(); mRecorder = null; } } private void onPauseRecording() { Log.i("pause rec", "MessageManager"); mRecorder.reset(); } private void onResumeRecording() { Log.i("resume rec", "MessageManager"); mRecorder.start(); } }