绘制容器类：

//图形绘制容器public class Contanier {	private List
    
      list;	private float x=0,y=0;	public Contanier(){		list=new ArrayList
     
      ();	}	public void draw(Canvas canvas){		canvas.save();		canvas.translate(getX(), getY());		childrenDraw(canvas);		for(Contanier c : list){			c.draw(canvas);		}		canvas.restore();	}	public void childrenDraw(Canvas canvas){			}	public void addChildren(Contanier child){		list.add(child);	}	public void removeChildren(Contanier child){		list.remove(child);	}	public float getX() {		return x;	}	public void setX(float x) {		this.x = x;	}	public float getY() {		return y;	}	public void setY(float y) {		this.y = y;	}	}
     
    

绘制正方型类：

//绘制正方型public class Rect extends Contanier {	private Paint paint;	public Rect(){		paint=new Paint();		paint.setColor(Color.RED);	}		@Override	public void childrenDraw(Canvas canvas) {		super.childrenDraw(canvas);		canvas.drawRect(0, 0, 100, 100, paint);		this.setY(getY()+1);	}}

 绘制圆：

//绘制圆public class Circle extends Contanier {	private Paint paint;	public Circle(){		paint=new Paint();		paint.setColor(Color.BLUE);	}	@Override	public void childrenDraw(Canvas canvas) {		super.childrenDraw(canvas);		canvas.drawCircle(50, 50, 50, paint);	}}

绘制类：

public class GameView extends SurfaceView implements Callback{	private Contanier contaier;	private Rect rect;	private Circle circle;	public GameView(Context context) {		super(context);		contaier=new Contanier();		rect=new Rect();		circle=new Circle();		rect.addChildren(circle);		contaier.addChildren(rect);		getHolder().addCallback(this);	}	private void draw(){		Canvas canvas=getHolder().lockCanvas();		canvas.drawColor(Color.WHITE);		contaier.draw(canvas);		getHolder().unlockCanvasAndPost(canvas);	}		private Timer timer=null;	private TimerTask task=null;		//开始后让其根据Y轴进行移动	private void startTimer(){		timer=new Timer();		task=new TimerTask() {			@Override			public void run() {				draw();			}		};		timer.schedule(task, 100,100);	}	private void stopTimer(){		if(timer!=null){			timer.cancel();			timer=null;		}	}	@Override	public void surfaceChanged(SurfaceHolder holder, int format, int width,			int height) {			}	@Override	public void surfaceCreated(SurfaceHolder holder) {		startTimer();	}	@Override	public void surfaceDestroyed(SurfaceHolder holder) {		stopTimer();	}	}

MainActivity:

@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(new GameView(this));    }

 

效果：