多媒体_视频播放器

//mainActivity

package com.demo.vedio;

import java.io.IOException;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;

public class MainActivity extends Activity {
	private MediaPlayer player;
	private SurfaceView sv;
	SurfaceHolder holder;
	int progress = 0;     //定义播放进度
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		sv = (SurfaceView) findViewById(R.id.sv);
		//获取surfaceview的控制器
		holder = (SurfaceHolder) sv.getHolder();
		
		holder.addCallback(new Callback() {

			@Override
			//在surfaceview销毁时调用
			public void surfaceDestroyed(SurfaceHolder holder) {
				if(player != null){
					//停止之前先保存播放进度
					progress = player.getCurrentPosition();
					player.stop();    //停止
					player.release();   //释放资源
					player = null;
				}
				
			}
			
			//在surfaceview创建时调用
			@Override
			public void surfaceCreated(SurfaceHolder holder) {
				
				if(player == null){  //判断play是否为空，空就创建
					player = new MediaPlayer();
					//player.reset();
					try {
						player.setDataSource("mnt/sdcard/2.3gp");
						//指定视频播放在哪个surfaceview
						player.setDisplay(holder);  //返回的是一个Surfaceholder
						player.prepare();
						//跳转到上一次停止的地方继续播放
						player.seekTo(progress);
						player.start();
					} catch (Exception e) {
						e.printStackTrace();
					} 
					
				}
				
				
			}
			
			@Override
			//在surfaceview改变时调用
			public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
			}
	
		});

		
	}
}package com.demo.vedio;

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