Android自定义控件ImageView实现点击之后出现阴影效果

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:id="@+id/activity_main" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:paddingBottom="@dimen/activity_vertical_margin" 
 android:paddingLeft="@dimen/activity_horizontal_margin" 
 android:paddingRight="@dimen/activity_horizontal_margin" 
 android:paddingTop="@dimen/activity_vertical_margin" 
 tools:context="com.hanzheng.imagebutton.MainActivity" 
 android:orientation="vertical"> 
 
 
 <ImageButton 
  android:id="@+id/button" 
  android:layout_width="100dp" 
  android:layout_height="100dp" 
  android:src="#ff0000" 
  /> 
 
 
 <com.hanzheng.imagebutton.ClickImageView 
  android:layout_marginTop="10dp" 
  android:id="@+id/clickimageview" 
  android:clickable="true" 
  android:src="@drawable/flow" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content"/> 
 
 
 <com.hanzheng.imagebutton.ClickImageView 
  android:layout_marginTop="10dp" 
  android:id="@+id/clickimageview2" 
  android:clickable="true" 
  android:src="#0f0" 
  android:layout_width="100dp" 
  android:layout_height="100dp"/> 
</LinearLayout> 

package com.hanzheng.imagebutton; 
 
import android.content.Context; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.widget.ImageView; 
 
/** 
 * Created by zmybi on 2017/1/3. 
 */ 
 
public class ClickImageView extends ImageView { 
 
 public ClickImageView(Context context) { 
  super(context); 
 } 
 public ClickImageView(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 } 
 public ClickImageView(Context context, AttributeSet attrs, int defStyleAttr) { 
  super(context, attrs, defStyleAttr); 
 } 
 
 
 @Override 
 public boolean onTouchEvent(MotionEvent event) { 
 
  switch (event.getAction()) { 
   case MotionEvent.ACTION_DOWN: 
    this.setColorFilter(0x33000000); 
    //重写触摸事件的方法,当按钮被点击的时候 
    mOnClickListener.onClick(); 
    return true; 
   case MotionEvent.ACTION_UP: 
   case MotionEvent.ACTION_CANCEL: 
    this.setColorFilter(null); 
    break; 
  } 
  return super.onTouchEvent(event); 
 } 
 
 /** 
  * 定义点击的接口 
  */ 
 interface OnClickListener { 
  void onClick(); 
 } 
 
 private OnClickListener mOnClickListener; 
 
 public void setOnClickListener (OnClickListener onClickListener) { 
  this.mOnClickListener = onClickListener; 
 } 
 
 
} 

package com.hanzheng.imagebutton; 
 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.ImageButton; 
import android.widget.Toast; 
 
public class MainActivity extends AppCompatActivity { 
 
 private ImageButton mBt; 
 private ClickImageView mCiv; 
 private ClickImageView mCiv2; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  mBt = (ImageButton) findViewById(R.id.button); 
  mCiv = (ClickImageView) findViewById(R.id.clickimageview); 
  mCiv2 = (ClickImageView) findViewById(R.id.clickimageview2); 
  mCiv.setOnClickListener(new ClickImageView.OnClickListener() { 
   @Override 
   public void onClick() { 
    Toast.makeText(MainActivity.this,"自定义ImageView点击1",Toast.LENGTH_SHORT).show(); 
   } 
  }); 
 
  mCiv2.setOnClickListener(new ClickImageView.OnClickListener() { 
   @Override 
   public void onClick() { 
    Toast.makeText(MainActivity.this,"自定义ImageView点击2",Toast.LENGTH_SHORT).show(); 
   } 
  }); 
 
  mBt.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View view) { 
    Toast.makeText(MainActivity.this,"ImageButton点击",Toast.LENGTH_SHORT).show(); 
   } 
  }); 
 } 
}