我访问下载文件夹，但无法访问android上下载文件夹中的文件 [英] I access the download folder but I cannot access the files in the download folder on android

问题描述

我访问下载文件夹，但无法访问android上下载文件夹中的文件.我想检查下载文件夹中的文件是否存在.例如，当我想从互联网上下载一个名为example.txt的文件时，我想检查该文件是否在下载文件夹中.我寻找了许多解决方案，但找不到.谢谢

I access the download folder but I cannot access the files in the download folder on android. I want to check the present of a file in the download folder. For example, when I want to download a file named example.txt from the internet, I want to check if that file is in the download folder. I looked for many solutions but I couldn't find. Thanks

File dir=  new File(Environment.
                getExternalStoragePublicDirectory(Environment
                        .DIRECTORY_DOWNLOADS).getAbsolutePath() + "/example.pdf");

        if(dir.exists()) {
           Toast.makeText(getApplicationContext(), "File Already Exists",
                    Toast.LENGTH_LONG).show();
        }

推荐答案

如果在Android10中使用，则可以尝试以下代码.

You can try below code if using in Android10.

<application android:requestLegacyExternalStorage="true" ... >
    ...
  </application> 

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