這個很簡單,勿噴!
效果如下:
代碼非常簡單,但是我相信不是每個人都知道這個小知識點:
package com.helper.view.imageview;
import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ImageView;
/**
* Created by deadline on 2015/8/17.
* 當按下的時候會給ImageView添加一層蒙版
*/
public class FilterImageView extends ImageView {
private int color;
public FilterImageView(Context context) {
this(context, null);
}
public FilterImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FilterImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initFilterImageView();
}
private void initFilterImageView() {
color = Color.GRAY;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
setColorFilter(color, PorterDuff.Mode.MULTIPLY);
break;
case MotionEvent.ACTION_UP:
clearColorFilter();
break;
}
return super.onTouchEvent(event);
}
public int getFilterColor() {
return color;
}
public void setFilterColor(int color) {
this.color = color;
}
}