安卓播放音頻和視頻

先貼出本文程序運行結果的截圖，上面是播放/停止音頻，可用SeekBar來調進度，下面是播放/停止視頻，也是用SeekBar來調進度：

main.xml的源碼:

本文程序的源碼，有點長：

package com.testMedia;

import java.io.IOException;  
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;  
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;  
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;  
import android.widget.Button;  
import android.widget.SeekBar;
import android.widget.Toast;  


public class testMedia extends Activity {
          /** Called when the activity is first created. */ 

        private SeekBar skb_audio=null;
    private Button btn_start_audio = null;  
    private Button btn_stop_audio = null;

    private SeekBar skb_video=null;
    private Button btn_start_video = null;  
    private Button btn_stop_video = null;
    private SurfaceView surfaceView; 
    private SurfaceHolder surfaceHolder; 
    
    private MediaPlayer m = null;  
    private Timer mTimer;
    private TimerTask mTimerTask;
    
    private boolean isChanging=false;//互斥變量，防止定時器與SeekBar拖動時進度沖突
     @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        
        //----------Media控件設置---------//
        m=new MediaPlayer();
        
        //播放結束之後彈出提示
        m.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){
                        @Override
                        public void onCompletion(MediaPlayer arg0) {
                                Toast.makeText(testMedia.this, "結束", 1000).show();
                                m.release();
                        }
        });
        
      //----------定時器記錄播放進度---------//
        mTimer = new Timer();
        mTimerTask = new TimerTask() {
            @Override
            public void run() {        
                    if(isChanging==true)
                            return;
                    
                    if(m.getVideoHeight()==0)
                            skb_audio.setProgress(m.getCurrentPosition());
                    else 
                            skb_video.setProgress(m.getCurrentPosition());
            }
        };

        mTimer.schedule(mTimerTask, 0, 10);
                
        btn_start_audio = (Button) this.findViewById(R.id.Button01);  
        btn_stop_audio = (Button) this.findViewById(R.id.Button02);  
        btn_start_audio.setOnClickListener(new ClickEvent());
        btn_stop_audio.setOnClickListener(new ClickEvent());
        skb_audio=(SeekBar)this.findViewById(R.id.SeekBar01);
        skb_audio.setOnSeekBarChangeListener(new SeekBarChangeEvent());
        
        btn_start_video = (Button) this.findViewById(R.id.Button03);  
        btn_stop_video = (Button) this.findViewById(R.id.Button04);  
        btn_start_video.setOnClickListener(new ClickEvent());
        btn_stop_video.setOnClickListener(new ClickEvent());
        skb_video=(SeekBar)this.findViewById(R.id.SeekBar02);
        skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent());
        surfaceView = (SurfaceView) findViewById(R.id.SurfaceView01);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.setFixedSize(100, 100);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }  
     
  /*
   * 按鍵事件處理
   */
  class ClickEvent implements View.OnClickListener{
        @Override
        public void onClick(View v) {
                if(v==btn_start_audio)
                {
                        m.reset();//恢復到未初始化的狀態
                        m=MediaPlayer.create(testMedia.this, R.raw.big);//讀取音頻
                        skb_audio.setMax(m.getDuration());//設置SeekBar的長度
                        try {                                        
                                m.prepare();        //准備
                        } catch (IllegalStateException e) {                        
                                // TODO Auto-generated catch block                                
                                e.printStackTrace();                                
                        } catch (IOException e) {                        
                                // TODO Auto-generated catch block                                
                                e.printStackTrace();                                
                        }                
                        m.start();        //播放
                }
                else if(v==btn_stop_audio || v==btn_stop_video)
                {
                        m.stop();
                }
                else if(v==btn_start_video)
                {
                        m.reset();//恢復到未初始化的狀態
                        m=MediaPlayer.create(testMedia.this, R.raw.test);//讀取視頻
                        skb_video.setMax(m.getDuration());//設置SeekBar的長度
                        m.setAudioStreamType(AudioManager.STREAM_MUSIC);
                        m.setDisplay(surfaceHolder);//設置屏幕
                        
                        try {
                            m.prepare();
                            
                        } catch (IllegalArgumentException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        } catch (IllegalStateException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }
                        m.start();
                }
        }
  }
  
  /*
   * SeekBar進度改變事件
   */
  class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener{

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
                        boolean fromUser) {
                // TODO Auto-generated method stub
                
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            isChanging=true;
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
                m.seekTo(seekBar.getProgress());
            isChanging=false;        
        }
          
  }

}