view动画实例

package game.test;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class GameTest extends Activity implements Runnable {
    /** Called when the activity is first created. */
    MyView myView;
    Handler handler;
    boolean bExit = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 隐去电池等图标和一切修饰部分（状态栏部分）
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // 隐去标题栏（程序的名字）
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        myView = new MyView(this);
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                myView.invalidate();
            }
        };
        setContentView(myView);
        new Thread(this).start();
    }

    @Override
    public void run() {
        while (!bExit) {
            handler.sendEmptyMessage(0);
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

}

class MyView extends View {
    private Paint paint;
    private int left;
    public MyView(Context context) {
        super(context);
        paint = new Paint();
        paint.setAntiAlias(true);// 设置画笔无锯齿(如果不设置可以看到效果很差)
        this.setKeepScreenOn(true);// 设置背景常亮
        paint.setColor(Color.RED);
        left = 0;
    }

    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);
        canvas.drawColor(Color.WHITE);// 设置刷屏颜色
        Rect rect = new Rect(left, 20, left + 10, 30); // 这里最后两个参数不是宽高、而是矩形右下角的坐标
        canvas.drawRect(rect, paint);
        left += 10;
        if(left > 200)
            left = 0;
    }

}