Android 播放音乐文件与视频文件

package cn.m15.test;

import android.app.Activity;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.VideoView;

public class TestActivity extends Activity {

	Button mPlayMusic = null;
	Button mStopMusic = null;
	Button mPlayVido = null;
	Button mStopVido = null;

	TextView mTextView = null;
	VideoView mVideoView;
	Uri mUri;

	MediaPlayer mMediaMusic = null;
	MediaPlayer mMediaVido = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		mPlayMusic = (Button) findViewById(R.id.btn_01);
		mStopMusic = (Button) findViewById(R.id.btn_02);
		mPlayVido = (Button) findViewById(R.id.btn_03);
		mStopVido = (Button) findViewById(R.id.btn_04);

		// 创建MediaPlayer 这里用的音频格式是mp3
		mMediaMusic = MediaPlayer.create(this, R.raw.music);

		// 创建视频播放视图
		mVideoView = (VideoView) findViewById(R.id.vidoView);

		// sd卡下文件的路径(这是我录的一段汤姆猫的录像)
		mUri = Uri.parse(Environment.getExternalStorageDirectory() + "/TalkingFriends/TalkingTom.mp4");

		// 设置MediaController
		mVideoView.setMediaController( new MediaController(this));

		// 设置音频循环播放
		mMediaMusic.setLooping(true);

		mTextView = (TextView) findViewById(R.id.textView);

		// 播放声音
		mPlayMusic.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				mTextView.setText("开始播放音频");
				if (!mMediaMusic.isPlaying()) {
					mMediaMusic.start();
				}

			}
		});
		// 关闭声音
		mStopMusic.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				mTextView.setText("停止播放音频");
				if (mMediaMusic.isPlaying()) {
					mMediaMusic.stop();
				}
			}
		});

		// 播放视频
		mPlayVido.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				mTextView.setText("开始播放视频");
				mVideoView.setVideoURI(mUri);
				mVideoView.start();
			}
		});

		// 关闭视频
		mStopVido.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				mTextView.setText("停止播放视频");
				mVideoView.stopPlayback();
			}
		});
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView"
    />
    <Button android:id="@+id/btn_01" android:layout_height="50dip"
			android:text="播放音频" android:layout_width="150dip"/>
	<Button android:id="@+id/btn_02" android:layout_height="50dip"
			android:text="关闭音频" android:layout_width="150dip"/>
	<Button android:id="@+id/btn_03" android:layout_height="50dip"
			android:text="播放视频" android:layout_width="150dip"/>
	<Button android:id="@+id/btn_04" android:layout_height="50dip"
			android:text="关闭视频" android:layout_width="150dip"/>
	<VideoView
	android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/vidoView"
	/>
</LinearLayout>