How to detect if an Android ImageView drawable is an anim?

Question

In my app I have an ImageView that can have a changing source. The source is always a Drawable, either a Bitmap or an xml anim made of drawables. But, when the source is an animation, I have to call the start() method on the Drawable and thus cast it to an AnimationDrawable first.

Of course, the non animated Drawable cast to AnimationDrawable throws a ClassCastException. I currently catch it and it works pretty well. But I'm not satisfied with this and I would prefer not to try to cast the Drawable if it's not an animation.

Is there a way to detect the type of Drawable used as source of an ImageView so I could cast it only if it's an animation ?

Thanks, Nicolas.

from where you get the drawable ? – Heshan Sandeepa Mar 30 '15 at 11:43 — Heshan Sandeepa, Mar 30 '15 at 11:43
instanceof works fine, thanks ! – Nicolas Massart Mar 30 '15 at 15:51 — Nicolas Massart, Mar 30 '15 at 15:51

score 1 · Accepted Answer · answered Mar 30 '15 at 15:53

1

instanceof works fine, thanks !

My working code :

Drawable drawable = imageView.getDrawable();
if(drawable instanceof AnimationDrawable){
    ((AnimationDrawable) drawable).start();
}

answered Mar 30 '15 at 15:53

Nicolas Massart

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How to detect if an Android ImageView drawable is an anim?

1 Answers1