1 package ui;
2
3 import android.content.Context;
4 import android.graphics.Canvas;
5 import android.graphics.Color;
6 import android.graphics.Paint;
7 import android.util.AttributeSet;
8 import android.view.MotionEvent;
9 import android.view.View;
10
11 /**
12 * Created by Administrator on 2016/4/3.
13 */
14 public class MoveCircle extends View{
15 public MoveCircle(Context context) {
16 super(context);
17 }
18
19 public MoveCircle(Context context, AttributeSet attrs) {
20 super(context, attrs);
21 }
22
23 public MoveCircle(Context context, AttributeSet attrs, int defStyleAttr) {
24 super(context, attrs, defStyleAttr);
25 }
26
27 float currentX = 50.0f;
28 float currentY = 50.0f;
29
30 @Override
31 protected void onDraw(Canvas canvas) {
32 super.onDraw(canvas);
33 Paint paint = new Paint();
34 paint.setColor(Color.RED);
35 canvas.drawCircle(currentX,currentY,10,paint);
36 }
37
38 @Override
39 public boolean onTouchEvent(MotionEvent event) {
40 super.onTouchEvent(event);
41 currentX = event.getX();
42 currentY = event.getY();
43 //重绘
44 invalidate();
45 return true;
46
47 }
48 }
