Android遊戲開發學習筆記（三）：視頻的播放

1、在命令行下輸入mksdcard 512M c:\sdcard.img命令，建立sdcard鏡像文件。

2、單擊Eclipse的菜單命令「Window/Preferences」，打開Preferences窗口，在左側選中「Android/Launch」，在右側的「Default emulator options」中填入「-sdcard c:\sdcard.img」。

3、啓動模擬器，切換視圖到DDMS，找到「File Explorer」窗口，選中「mnt/sdcard」，執行右上角的「Push a file onto the device」，向sdcard中添加視頻文件「qtfy01.3gp」。

4、編寫項目的佈局文件main.xml，代碼以下：

<?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"
    >
    <SurfaceView
        android:id="@+id/surfaceView"
        android:layout_width="fill_parent"
        android:layout_height="380px"
        />
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        >
        <Button
            android:id="@+id/play_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="播放"
            />
        <Button
            android:id="@+id/pause_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="暫停"
            />
    </LinearLayout>
</LinearLayout>

package game.test;

import android.app.Activity;
import android.graphics.PixelFormat;
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.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements SurfaceHolder.Callback {
    String path = "/sdcard/qtfy01.3gp";
    Button play_btn, pause_btn;
    boolean isPause = false;
    SurfaceHolder surfaceHolder;
    MediaPlayer mediaPlayer;
    SurfaceView surfaceView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        play_btn = (Button) findViewById(R.id.play_btn);
        play_btn.setOnClickListener(video_listener);
        pause_btn = (Button) findViewById(R.id.pause_btn);
        pause_btn.setOnClickListener(video_listener);
        getWindow().setFormat(PixelFormat.UNKNOWN);
        surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);
        surfaceHolder.setFixedSize(176, 144);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mediaPlayer = new MediaPlayer();
    }

    private OnClickListener video_listener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.play_btn:
                isPause = false;
                playVideo(path);
                break;

            case R.id.pause_btn:
                if (isPause == false) {
                    mediaPlayer.pause();
                    isPause = true;
                } else {
                    mediaPlayer.start();
                    isPause = false;
                }
                break;
            }
        }

        private void playVideo(String path) {
            // TODO Auto-generated method stub
            if (mediaPlayer.isPlaying() == true) {
                mediaPlayer.reset();
            }
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mediaPlayer.setDisplay(surfaceHolder);
            try {
                mediaPlayer.setDataSource(path);
                mediaPlayer.prepare();
            } catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }
            mediaPlayer.start();
        }
    };

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // TODO Auto-generated method stub
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
    }
}