标签：
TouchEvent.class
package com.bwie.touch;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class TouchEvent extends View {
public float x=50;//刚进入时小球的位置
public float y=60;
public TouchEvent(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
Paint paint=new Paint();
//设置画笔的颜色
paint.setColor(Color.CYAN);
//画一个小球
canvas.drawCircle(x, y, 20, paint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
//获得该小球的x,y
this.x=event.getX();
this.y=event.getY();
//通知该组件重绘
this.invalidate();
//返回true表明处理方法已经处理该事件
return true;
}
}
xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <com.bwie.touch.TouchEvent android:layout_width="wrap_content" android:layout_height="wrap_content" /> </RelativeLayout>
标签：
原文地址：http://www.cnblogs.com/ldou/p/5369917.html
