即使在允许MANAGE_EXTERNAL_STORAGE之后，我也无法删除安卓11表单内部存储中的文件夹

Question

即使在允许"MANAGE_EXTERNAL_STORAGE“权限后，我也无法删除内部存储中的文件夹。

File file = new File("/storage/emulated/0/T4");
file.delete();

"file.delete();“不工作，但代码没有崩溃，文件夹仍然存在于Android11设备中。

提前感谢

Answer 1

清单：

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />

MainActivity：

delete_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {

                    if (Environment.isExternalStorageManager()){

                     File dir = new File(Environment.getExternalStorageDirectory() + "/T4");
                     boolean success =  deleteFolder(dir);

                     // here you can check whether the folder has been deleted or not

                        if (success){
                            Toast.makeText(MainActivity.this, "Delete succeeded", Toast.LENGTH_SHORT).show();
                        }else {
                            Toast.makeText(MainActivity.this, "Delete failed", Toast.LENGTH_SHORT).show();
                        }

                    }else {

                        Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
                        Uri uri = Uri.fromParts("package",getPackageName(),null);
                        intent.setData(uri);
                        startActivity(intent);
                    }

                }else {

                    // other SDK version

          }

     }

Delete方法

  private boolean deleteFolder(File dir) {
        File[] files = dir.listFiles();
        if (files != null) {
            for (File file : files) {
                deleteFolder(file);
            }
        }
        return dir.delete();
    }

Answer 2

不能删除包含文件的文件夹。