学步园

经常用到多个透明图片层叠，但又需要获取不同图片的点击事件，本文实现图片透明区域穿透点击事件。

效果图：

 欢迎转载请说明转自：http://blog.csdn.net/aminfo/article/details/7872748

一、先上图片，这2张图片尺寸是一样的，放到drawable目录下：

图1：transparent.png

图2：transparent2.png

二、上布局文件，test.xml：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:orientation="vertical"
   android:gravity="center"
   android:id="@+id/mainLayout">
   
    <ImageView android:id="@+id/ImageView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/transparent"/>
    
    <ImageView android:id="@+id/ImageView02"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/transparent2"/>    
  		
</FrameLayout>

三、上Activity文件，MainActivity.java

package org.shuxiang.test;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

public class MainActivity extends Activity
{
	private ImageView iv1;
	private ImageView iv2;
	private Bitmap bitmap1, bitmap2;
	private boolean iv1Transparent = false;
	private boolean iv2Transparent = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.test);

        iv1 = (ImageView) findViewById(R.id.ImageView01);
        iv2 = (ImageView) findViewById(R.id.ImageView02);
        bitmap1 = ((BitmapDrawable) (iv1.getDrawable())).getBitmap();
        bitmap2 = ((BitmapDrawable) (iv2.getDrawable())).getBitmap();
        
        iv1.setOnClickListener(new OnClickListener(){
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(iv1Transparent)
				{
					Log.i("test", "图1透明区域");
				}
				else
				{
					Log.i("test", "图1点击");					
				}
			}
        	
        });
        
        iv1.setOnTouchListener(new OnTouchListener()
        {
			@Override
			public boolean onTouch(View arg0, MotionEvent arg1) 
			{
				// TODO Auto-generated method stub
				if(bitmap1.getPixel((int)(arg1.getX()),((int)arg1.getY()))==0)
				{
					Log.i("test", "图1透明区域");
					iv1Transparent = true;	//透明区域设置true					
				}
				else
				{
					Log.i("test", "图1实体区域");
					iv1Transparent = false;
				}
				return false;
			}        	
        });
        
        iv2.setOnClickListener(new OnClickListener()
        {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(iv2Transparent)
				{
					Log.i("test", "图2透明区域");
				}
				else
				{
					Log.i("test", "图2点击");					
				}
			}
        	
        });
        
        iv2.setOnTouchListener(new OnTouchListener()
        {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub
				if(bitmap2.getPixel((int)(event.getX()),((int)event.getY()))==0)
				{
					Log.i("test", "图2透明区域");
					iv2Transparent = true;	//透明区域设置true
					iv1.dispatchTouchEvent(event);
				}
				else
				{
					Log.i("test", "图2实体区域");
					iv2Transparent = false;
				}
				return false;
			}
        });
    }
}