Android的SurfaceView测试代码

import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.RectF;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.SurfaceHolder.Callback;

public class MainActivity extends Activity {
int[] rs ={R.drawable.test, R.drawable.test1};

protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SurfaceView surface = (SurfaceView)findViewById(R.id.surface);
surface.setKeepScreenOn(true);

final SurfaceHolder holder = surface.getHolder();
final Context ct = this.getBaseContext();
final Thread mythread = new Thread(new Runnable(){
int i = 0;
@Override
public void run() {
try {
while(true){
i++;//两张图片交替显示
Bitmap bmp = BitmapFactory.decodeResource(ct.getResources(), rs[i%2]);
Canvas canvas = holder.lockCanvas();
canvas.drawColor(Color.WHITE);
RectF rectf = new RectF(0, 0, 200, 200);
canvas.drawBitmap(bmp, null, rectf, null);
holder.unlockCanvasAndPost(canvas);
Thread.sleep(1000);
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});

holder.addCallback(new Callback() {
@Override
public void surfaceDestroyed(SurfaceHolder holder) {

}

@Override
public void surfaceCreated(SurfaceHolder holder) {
mythread.start();
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

}
});
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

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

</LinearLayout>