如果文件存在测试 [英] Test if file exists

问题描述

我想在Android开放的文件是这样的：

I'm trying to open a file in android like this :

  try
   {
      FileInputStream fIn = context.openFileInput(FILE);
      DataInputStream in = new DataInputStream(fIn);
      BufferedReader br = new BufferedReader(new InputStreamReader(in));
      if(in!=null)
          in.close();
   }
   catch(Exception e)
   {  }

，但如果该文件不存在找不到文件异常。我想知道我怎么能测试，如果该文件试图打开它之前存在。

, but in case the file does not exists a file not found exception is thrown . I'd like to know how could I test if the file exists before attempting to open it.

推荐答案

我觉得最好的办法知道文件是否存在，实际上并没有试图打开它，如下：

I think the best way to know if a file exists, without actually trying to open it, is as follows:

File file = getContext().getFileStreamPath(FILE_NAME);
if(file.exists()) ...

希望帮助，再见！

Hope that helps, bye!

这篇关于如果文件存在测试的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！