The android custom button example of overrides the imagebutton control to implement the image button

The ImageButton class was overridden because there are more picture buttons of this type.

package me.henji.widget;
import android.content.Context;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnTouchListener;
import android.widget.ImageButton;
/**
 *  Custom picture button ( ImageButton ), press color change 
 * @author Leo
 * @created 2013-3-15
 */
public class CmButton extends ImageButton implements OnTouchListener, OnFocusChangeListener {
 public CmButton(Context context) {
  super(context);
  this.setOnTouchListener(this);
  this.setOnFocusChangeListener(this);
 }
 public CmButton(Context context, AttributeSet attrs) {
  this(context, attrs, android.R.attr.imageButtonStyle);
  this.setOnTouchListener(this);
  this.setOnFocusChangeListener(this);
 }
 public CmButton(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  setFocusable(true);
  this.setOnTouchListener(this);
  this.setOnFocusChangeListener(this);
 }
 @Override
 public void onFocusChange(View v, boolean hasFocus) {
  //  Effect of gray 
  ColorMatrix cm = new ColorMatrix();
  cm.setSaturation(0);
  if (hasFocus) {
   ((ImageButton) v).getDrawable().setColorFilter(new ColorMatrixColorFilter(cm));
  } else {
   ((ImageButton) v).getDrawable().clearColorFilter();
  }
 }
 @Override
 public boolean onTouch(View v, MotionEvent event) {
  //  Effect of gray 
  ColorMatrix cm = new ColorMatrix();
  cm.setSaturation(0);
  if (event.getAction() == MotionEvent.ACTION_DOWN) {
   ((ImageButton) v).getDrawable().setColorFilter(new ColorMatrixColorFilter(cm));
  } else if (event.getAction() == MotionEvent.ACTION_UP) {
   ((ImageButton) v).getDrawable().clearColorFilter();
  }
  return false;
 }
}

Layout file

<me.henji.widget.CmButton
    android:id="@+id/btn_login"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#00000000"
    android:src="@drawable/button_login"
    android:text="@string/login_login" />