Code example for Drawable

Methods: setVisible

            // This is a hack to get any animated drawables (like a 'working' spinner) 
            // to animate. You have to setVisible true on an AnimationDrawable to get 
            // it to start animating, but it must first have been false or else the 
            // call to setVisible will be ineffective. We need to clear up the story 
            // about animated drawables in the future, see http://b/1878430. 
            drawable.setVisible(false, false);
            drawable.setVisible(true, false);
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