question: @ Override public synchronized void clear ( ) { File [ ] files = mRootDirectory . listFiles ( ) ; if ( files != null ) { for ( File file : files ) { file . delete ( ) ; } } mEntries . clear ( ) ; mTotalSize = 0 ; VolleyLog . d ( "Cache cleared." ) ; }
target:  Clears the cache. Deletes all cached files from disk.