如何在 Android 11 中征求用户同意

Question

它在 android 10 中工作得很好，但在 android 11 中不工作经过一些研究我发现我们必须征求用户同意，所以我看了一些视频，我不明白怎么办，谁能帮帮我！

           File file = new File(childItem.getPath());

                file.delete();
                if (file.exists()) {
                    try {
                        file.getCanonicalFile().delete();
                        if (file.exists()) {
                            deleteFile(file.getName());
                        }
                    } catch (IOException unused) {
                        unused.printStackTrace();
                    }
                }

Answer 1

对于安卓11；您需要 user-interaction 才能修改或删除外部存储中的任何文件。您需要使用 createDeleteRequest 来删除文件。您可以按照以下步骤操作：

if (SDK_INT >= Build.VERSION_CODES.R) {
  List<Uri> uris = new ArrayList<>();
  
  // Your for loop starts here, if you want to delete multiple files..
  
// for(File childItem : yourFileList){

      long mediaID = getFilePathToMediaID(childItem.getPath(), MainActivity.this);
      Uri Uri_one = ContentUris.withAppendedId(MediaStore.Images.Media.getContentUri("external"), mediaID);
      uris.add(Uri_one);
     // } /*for ends here */
        
             requestDeletePermission(MainActivity.this, uris);
}

现在像这样创建删除请求；

 private static final int REQUEST_PERM_DELETE = 444;

    @RequiresApi(api = Build.VERSION_CODES.R)
    private void requestDeletePermission(Context context, List<Uri> uri_one) {
        PendingIntent pi = MediaStore.createDeleteRequest(context.getContentResolver(), uri_one);
        try {
            startIntentSenderForResult(pi.getIntentSender(), REQUEST_PERM_DELETE, null, 0, 0, 0);
        } catch (IntentSender.SendIntentException e) {
            e.printStackTrace();
        }
    }

现在在您的 onActivityResult 中处理结果；

 @Override
    public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
       
        switch (requestCode) {
            case REQUEST_PERM_DELETE:
                if (resultCode == Activity.RESULT_OK) {
                    Toast.makeText(MainActivity.this, "Deleted successfully! Refreshing...", Toast.LENGTH_SHORT).show();
                      
                } else {
                    Toast.makeText(MainActivity.this, "Failed to delete!", Toast.LENGTH_SHORT).show();
                }
                break;

        }
    }

 public static long getFilePathToMediaID(String songPath, Context context) {
        long id = 0;
        ContentResolver cr = context.getContentResolver();

        Uri uri = MediaStore.Files.getContentUri("external");
        String selection = MediaStore.Audio.Media.DATA;
        String[] selectionArgs = {songPath};
        String[] projection = {MediaStore.Audio.Media._ID};
        String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";

        Cursor cursor = cr.query(uri, projection, selection + "=?", selectionArgs, null);

        if (cursor != null) {
            while (cursor.moveToNext()) {
                int idIndex = cursor.getColumnIndex(MediaStore.Audio.Media._ID);
                id = Long.parseLong(cursor.getString(idIndex));
            }
        }

        return id;
    }

希望对你有所帮助。

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