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 }
自定义圆球
1 <ui.MoveCircle
2 android:id="@+id/circle"
3 android:layout_width="wrap_content"
4 android:layout_height="wrap_content"
5 android:minHeight="100dp"
6 android:minWidth="100dp"
7 />
XML
转载于:https://www.cnblogs.com/YyuTtian/p/5348983.html
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