编写安卓程序结合service播放视频，包括xml界面、activity和seirvice,列出代码

以下是一个基本的安卓程序结合service播放视频的代码示例，包括xml界面、activity和service：

1. 布局文件activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <SurfaceView
        android:id="@+id/surface_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <Button
        android:id="@+id/play_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Play"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

2. MainActivity.java文件：

public class MainActivity extends AppCompatActivity {

    private SurfaceView mSurfaceView;
    private MediaPlayer mMediaPlayer;
    private Button mPlayButton;
    private boolean mIsPlaying;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
        mPlayButton = (Button) findViewById(R.id.play_button);

        mMediaPlayer = new MediaPlayer();
        mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mMediaPlayer.setDisplay(mSurfaceView.getHolder());

        mPlayButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mIsPlaying) {
                    mMediaPlayer.pause();
                    mPlayButton.setText("Play");
                } else {
                    mMediaPlayer.start();
                    mPlayButton.setText("Pause");
                }
                mIsPlaying = !mIsPlaying;
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
        }
    }
}

3. VideoService.java文件：

public class VideoService extends Service implements MediaPlayer.OnPreparedListener {

    private static final String TAG = "VideoService";
    public static final String ACTION_PLAY = "com.example.videoservice.action.PLAY";

    private MediaPlayer mMediaPlayer;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent.getAction().equals(ACTION_PLAY)) {
            String videoUrl = intent.getStringExtra("videoUrl");
            playVideo(videoUrl);
        }
        return super.onStartCommand(intent, flags, startId);
    }

    private void playVideo(String videoUrl) {
        if (mMediaPlayer == null) {
            mMediaPlayer = new MediaPlayer();
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mMediaPlayer.setOnPreparedListener(this);
        } else {
            mMediaPlayer.reset();
        }
        try {
            mMediaPlayer.setDataSource(videoUrl);
            mMediaPlayer.prepareAsync();
        } catch (IOException e) {
            Log.e(TAG, "Error while trying to play video", e);
        }
    }

    @Override
    public void onPrepared(MediaPlayer mp) {
        mp.start();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
        }
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

4. 在AndroidManifest.xml文件中注册服务：

<service android:name=".VideoService" />

5. 在MainActivity中启动服务：

Intent intent = new Intent(this, VideoService.class);
intent.setAction(VideoService.ACTION_PLAY);
intent.putExtra("videoUrl", "http://example.com/video.mp4");
startService(intent);