Androidのandroid.graphics.drawable.Drawable.Clalback回調インターフェース

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/*           Drawable   drawable，       setCallBack(android.graphics.drawable.Drawable.Callback)              drawable 
* 。              
*/   
public static interface Callback {  
        /** 
         *  drawable     ，    drawable       （  drawable       ） 
         * @param      drawable 
         */  
        public void invalidateDrawable(Drawable who);  
  
        /** 
         * drawable                。         postAtTime(Runnable, Object, long)      。            
         *  
         * @param who The drawable being scheduled. 
         * @param what The action to execute. 
         * @param when The time (in milliseconds) to run 
         */  
        public void scheduleDrawable(Drawable who, Runnable what, long when);  
  
        /** 
         *          scheduleDrawable(Drawable who, Runnable what, long when)      。      removeCallbacks(Runnable,Object)    
         * @param who The drawable being unscheduled. 
         * @param what The action being unscheduled. 
         */  
        public void unscheduleDrawable(Drawable who, Runnable what);  
    }