code: final public void refreshComplete() {
          if (DEBUG) {
              PtrCLog.i(LOG_TAG, "refreshComplete");
          }
  
          if (mRefreshCompleteHook != null) {
              mRefreshCompleteHook.reset();
          }
  
          int delay = (int) (mLoadingMinTime - (System.currentTimeMillis() - mLoadingStartTime));
          if (delay <= 0) {
              if (DEBUG) {
                  PtrCLog.d(LOG_TAG, "performRefreshComplete at once");
              }
              performRefreshComplete();
          } else {
              postDelayed(mPerformRefreshCompleteDelay, delay);
              if (DEBUG) {
                  PtrCLog.d(LOG_TAG, "performRefreshComplete after delay: %s", delay);
              }
          }
      }
docs: Call this when data is loaded.
  The UI will perform complete at once or after a delay, depends on the time elapsed is greater then {@link #mLoadingMinTime} or not.