创建txt文件Android时出错

Question

I'm trying to create a file to save a flag which I'll need in further executions. This is the code which I wrote in order to create the file:

FileOutputStream fileout=openFileOutput("flag.txt", MODE_PRIVATE);
OutputStreamWriter outputWriter=new OutputStreamWriter(fileout);
outputWriter.write("1");
outputWriter.close();

I detect the problem when I afterwards execute the app and try to read the file content, through the following code:

File f = new File("flag.txt");
if (f.exists())
   Toast.makeText(this, "The file exists", Toast.LENGTH_LONG).show();
else
   Toast.makeText(this, "The file wasn't created", Toast.LENGTH_LONG).show();

But it always follows the "else" branch. Any ideas?

Answer 1

要获取文件，请指定文件目录。

File file = new File(Environment.getExternalStorageDirectory(), "flag.txt");