在应用程序中播放音频和视频

package com.example.sudoku;

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

import com.example.sudoku.R.color;

import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.VideoView;

public class GameActivity extends Activity {
TextView tv;
Button btnStart;
Button btnPause,btnyuan,btnben,btnwang,btnstop2,btnshipi,btnexit,btnservice;
Button btnstop;
public MediaPlayer mediaPlayer=new MediaPlayer();
VideoView video;
Boolean ifstart=false;
//    public MediaPlayer mediaPlayer1;
protected void onCreate(Bundle savedInstanceState) {
ActionBar actionBar=getActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
super.onCreate(savedInstanceState);
setContentView(R.layout.game);
video=(VideoView)findViewById(R.id.videoView1);
tv=(TextView)findViewById(R.id.textView1);
btnStart=(Button)findViewById(R.id.button1);
btnPause=(Button)findViewById(R.id.button2);
btnstop=(Button)findViewById(R.id.button3);
btnyuan=(Button)findViewById(R.id.btnyuan);
btnben=(Button)findViewById(R.id.btnben);
btnwang=(Button)findViewById(R.id.btnwang);
btnstop2=(Button)findViewById(R.id.btnstop2);
btnshipi=(Button)findViewById(R.id.btnshipi);
btnexit=(Button)findViewById(R.id.btnexit);
btnservice=(Button)findViewById(R.id.btnservice);
btnservice.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startService(new Intent(GameActivity.this,BServiceMusic.class));
}
});
btnshipi.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
File file=new File(Environment.getExternalStorageDirectory().getPath()+File.separator+"h.mp4");
MediaController mc=new MediaController(GameActivity.this);
if(file.exists()){
video.setVideoPath(file.getAbsolutePath());
video.setMediaController(mc);
video.requestFocus();
video.start();
video.setOnCompletionListener(new OnCompletionListener() {

@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
Toast.makeText(GameActivity.this, "视频播放完毕！！", Toast.LENGTH_SHORT).show();
}
});
}else{
Toast.makeText(GameActivity.this, "找不到要播放的视频文件！！", Toast.LENGTH_SHORT).show();
}
}
});
btnstop2.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
if(mediaPlayer.isPlaying()||ifstart==true){
mediaPlayer.stop();
ifstart=false;
mediaPlayer=new MediaPlayer();
}
}
});
btnyuan.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(!mediaPlayer.isPlaying()||ifstart==false){
mediaPlayer=MediaPlayer.create(GameActivity.this, R.raw.nan);
mediaPlayer.start();
ifstart=true;
}
}
});
btnben.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(!mediaPlayer.isPlaying()||ifstart==false){
try {
mediaPlayer.setDataSource(Environment.getExternalStorageDirectory().getPath()+ File.separator + "beyond.mp3");
mediaPlayer.prepare();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException 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();
}
mediaPlayer.start();
ifstart=true;
}
}
});
btnstop.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(mediaPlayer.isPlaying()||ifstart==true){
mediaPlayer.stop();
ifstart=false;
mediaPlayer=new MediaPlayer();
}
}
});
btnPause.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
//                    Toast.makeText(GameActivity.this, "hhhhhhhhhhhh", Toast.LENGTH_LONG);
btnPause.setText("继续");
}else{
mediaPlayer.start();
btnPause.setText("暂停");
}

}
});
btnStart.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(!mediaPlayer.isPlaying()||ifstart==false){
mediaPlayer=MediaPlayer.create(GameActivity.this, R.raw.nan);
mediaPlayer.start();
ifstart=true;
}
}
});
btnexit.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
mediaPlayer.stop();
super.onDestroy();
}
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
MenuInflater inflater = new MenuInflater(this);
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case android.R.id.home:
//            //创建启动MainActivity的Intent
//            Intent intent=new Intent();
//            //添加额外的Flag，将Activity栈中处于MainActivity之上的Activity弹出
//            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
//            intent.setClass(GameActivity.this,MainActivity.class);
//            startActivity(intent);
this.finish();
break;
case R.id.item2:
Intent intent1=new Intent(this,Help.class);
startActivity(intent1);
this.finish();
break;
case R.id.item3:
Intent intent2=new Intent(this,AboutActivity.class);
startActivity(intent2);
this.finish();
break;
case R.id.item1:
Intent intent3=new Intent(this,GameActivity.class);
startActivity(intent3);
this.finish();
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
}