The android custom button example of overrides the imagebutton control to implement the image button
- 2020-05-27 07:11:44
- OfStack
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" />