获取触摸两点的坐标

 

 

准备一张名为picture的图片。

 

 

在main.xml中：

 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="vertical"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:background="#3399ff">

  <ImageView

     android:id="@+id/img"

     android:layout_width="wrap_content"

     android:layout_height="wrap_content"

     android:src="@drawable/picture"/>

</LinearLayout>

 

 

 

 

 

 

在MyMultitouchDemo.java中：

 

package com.li.multitouch;

 

import android.app.Activity;

import android.os.Bundle;

import android.view.MotionEvent;

 

public class MyMultitouchDemo extends Activity {

  @Override

  public void onCreate(Bundle savedInstanceState) {

     super.onCreate(savedInstanceState);

    super.setContentView(R.layout.main);

  }

 

  @Override

  public boolean onTouchEvent(MotionEvent event) {

     System.out.println("获得两点的坐标");

     if (event.getPointerCount() == 2) {

       System.out.println("坐标A：X = " + event.getX(0) + "，Y = "

            + event.getY(0));

       System.out.println("坐标B：X = " + event.getX(1) + "，Y = "

            + event.getY(1));

     }

     return super.onTouchEvent(event);

  }

 

}