如何从下载目录中删除文件？

Question

我尝试了很多方法，但无法删除该文件。

File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
File file = new File(path,"test.txt");

boolean deleted = file.delete();

此代码也很糟糕！ 有人可以帮帮我吗？