code: public void startSearch() {
  
          stopSearch();
  
          stop = false;
  
          MiscUtils.getExecutor().execute(new Runnable() {
              @Override
              public void run() {
                  isSearching = true;
                  try {
                      if (finder != null) {
                          finder.start();
                      }
  
                      for (String aSrPath : srPath) {
                          getFile(new File(aSrPath));
                      }
  
                      if (!stop && finder != null) {
                          finder.finished();
                      }
  
                  } finally {
                      isSearching = false;
                  }
  
              }
          });
      }
docs: 开始搜索目录. 当前搜索会停止之前的搜索