Question

I use those code to grey out a icon of RunningAppProcessInfo, but cause some side effect that all icon in other list greyed out too! SUP? Any solutions?

        ImageView icon = (ImageView) view.findViewById(R.id.icon);
        if (_isChecked) {
            ColorMatrix cm = new ColorMatrix();
            cm.setSaturation(0);
            icon.setColorFilter(new ColorMatrixColorFilter(cm));
        }

Answer 1

If you’re talking about a ListView here or something then do it like this:

ImageView icon = (ImageView) view.findViewById(R.id.icon); 
if (_isChecked) { 
    ColorMatrix cm = new ColorMatrix(); 
    cm.setSaturation(0); 
    icon.setColorFilter(new ColorMatrixColorFilter(cm)); 
} 
else {
    // Reset saturation to normal here
}

Reason for this being that views are reused in a ListView for performance.