public void evictAll(){
  if (mLruCache != null) {
    mLruCache.evictAll();
  }
  System.gc();
}

public void evictAll ( ) { if ( mLruCache != null ) { mLruCache . evictAll ( ) ; } System . gc ( ) ; }
evicts all of the items from the memory cache and lets the system know now would be a good time to garbage collect
