Android 多个ImageView图片层叠透明区域点击事件穿透
Android 多个ImageView图片层叠透明区域点击事件穿透
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:
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;
- }
- });
- }
- }
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