可视区域应用-android游戏开发

主要方法：
//----设置矩形可视区域
canvas.save();
canvas.clipRect(20,20,50,50);
canvas.drawBitmap(bmp, 0, 0, paint);
canvas.restore();
//----利用Path设置可视区域
canvas.save();
Path path=new Path();
path.addCircle(100+30, 100+30, 30, Direction.CCW);
canvas.clipPath(path);
canvas.drawBitmap(bmp, 100, 100, paint);
canvas.restore();
//----利用Region设置可视区域
canvas.save();
Region region = new Region();
region.op(new Rect(20,20+300,100,100+300), Region.Op.XOR);
region.op(new Rect(40,20+300,80,150+300), Region.Op.XOR);
canvas.clipRegion(region);
canvas.drawBitmap(bmp, 0, 300, paint);
canvas.restore();

案例运行结果：

package caicai.animation;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//设置全屏
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
//显示自定义的SurfaceView视图
setContentView(new clipView(this));

}
}

MainActivity
谢谢支持网站“趣淘鼓浪屿（www.qtgly.com）”