Android遊戲開發學習筆記(三):視頻的播放 – Android移動開發技術文章_手機開發 Android移動開發教學課程

一、在命令行下輸入mksdcard 512M c:\sdcard.img命令,創建sdcard鏡像文件。
二、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”。
三、啟動模擬器,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”。
四、編寫項目的佈局文件main.xml,代碼如下:
<?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>
五、編寫MainActivity.java代碼。
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 
    } 
}
 
作者“Android學習心得”

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