获得assets文件夹中文件内容

      /**
     * @param fileName
     * @return assets中文件的字符串
     */
    public String getFromAssets(String fileName){
          String result="";
          try {
              InputStreamReader inputReader = new InputStreamReader( getResources().getAssets().open(fileName) );
              BufferedReader bufReader = new BufferedReader(inputReader);
              String line="";
              while((line = bufReader.readLine()) != null) {
                  result += line;
              }
          } catch (Exception e) {
              e.printStackTrace();
          }
          return result;
      }