Android多媒体之Mediarecorder

package com.example.voicerecord;

import java.io.File;
import java.io.IOException;

import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class VoiceActivity extends Activity implements OnClickListener
{
    private Button record;
    private Button pause;
    private Button stop;
    private Button play;
    
    private MediaPlayer mp;
    private MediaRecorder mr;
    private File file;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_voice);
        
        initInBack();
        initRecoder();
    }

    //初始化MediaPlayer和MediaRecorder
    private void initInBack() 
    {
        try 
        {
            file = new File(Environment.getExternalStorageDirectory().getCanonicalFile(),"qiaoqiaozh.mp3");
        } 
        catch (IOException e1) 
        {
            e1.printStackTrace();
        }
        
        if(!file.exists())
        {
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
            
        }
        
        mr = new MediaRecorder();
        mr.setAudioSource(MediaRecorder.AudioSource.MIC);
        mr.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mr.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        mr.setOutputFile(file.getAbsolutePath());
        
        try 
        {
            mr.prepare();
            Log.i("TEST", "mouse");
        } 
        catch (IllegalStateException e) 
        {
            Log.i("TEST1", e.toString());
        } 
        catch (IOException e) 
        {
            Log.i("TEST2", e.toString());
        }
        
        mp = new MediaPlayer();
    }

    //初始化录音控件
    private void initRecoder() 
    {
        record = (Button)findViewById(R.id.record);
        pause = (Button)findViewById(R.id.pause);
        stop = (Button)findViewById(R.id.stop);
        play = (Button)findViewById(R.id.play);
        
        record.setOnClickListener(this);
        pause.setOnClickListener(this);
        stop.setOnClickListener(this);
        play.setOnClickListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
    {
        getMenuInflater().inflate(R.menu.voice, menu);
        return true;
    }

    @Override
    public void onClick(View v) 
    {
        switch(v.getId())
        {
            case R.id.record:
                mr.start();
                break;
            case R.id.pause:
                if(mp.isPlaying())
                    mp.pause();
            case R.id.stop:
                mr.stop();
                break;
            case R.id.play:
                try 
                {
                    mp.setDataSource(file.getAbsolutePath());
                    mp.prepare();
                } 
                catch (IllegalStateException e) 
                {
                    e.printStackTrace();
                } 
                catch (IOException e) 
                {

                    e.printStackTrace();
                }
                
                mp.start();
                break;
        }
    }

    @Override
    protected void onDestroy() 
    {
        mr.stop();
        mr.release();
        mp.stop();
        mp.release();
        super.onDestroy();
    }
    
    

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="record"
        android:layout_weight="1" />
    <Button
        android:id="@+id/pause"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="pause"
        android:layout_weight="1" />
    <Button
        android:id="@+id/stop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="stop"
        android:layout_weight="1" />
    <Button
        android:id="@+id/play"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="play"
        android:layout_weight="1" />

</LinearLayout>

使用MediaRecorder录音并使用MediaPlayer播放。