private void notifyLowMemory(){
synchronized (mListeners) {
    for (    MemoryListener listener : mListeners) {
      listener.onLowMemory();
    }
  }
}

private void notifyLowMemory ( ) { synchronized ( mListeners ) { for ( MemoryListener listener : mListeners ) { listener . onLowMemory ( ) ; } } }
notify our listener that memory is running low .
