[SOLVED] How to grant permanent permission on Uri images (androidx)

How to grant permanent permission on Uri images (androidx)

In my application a user can open the gallery and select their images by using androidX method:

registeredIntent = registerForActivityResult(new ActivityResultContracts.GetMultipleContents(), this);

And the callback for the result is sent in this method:

@Override
public void onActivityResult(List<Uri> result) {
    if(result != null && result.size() > 0) {
        sliderImageAdapter.addItems(result);
        binding.includeResultTask.imageSlider.setSliderAdapter(sliderImageAdapter, true);
    }
}

So far this works pretty well, the images are shown in my gallery component by adding the Uris in my adapter, the problem is that I save those in my database and when I restart the application the permissions are revoked and my application crash. I tried by adding this in my callback for each item:

requireActivity().getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);

But I get this error:

Permission Denial: opening provider com.android.providers.media.MediaDocumentsProvider from ProcessRecord{41a7dce 26094:it.ilogreco.levelup/u0a482} (pid=26094, uid=10482) requires that you obtain access using ACTION_OPEN_DOCUMENT or related APIs

I have even tried to use this for each item:

context.grantUriPermission(context.getPackageName(), uri, FLAG_GRANT_READ_URI_PERMISSION);

but I get this error:

UID 10482 does not have permission to content://com.android.providers.media.documents/document/image%3A108953 [user 0]; you could obtain access using ACTION_OPEN_DOCUMENT or related APIs

I load the Uris one time and save them to the database with the registerForActivityResult, I can't open the media gallery again with the API because it doesn't make sense, any idea how to get those permissions? I would like to avoid copying the content in the callback.

Solution

Switch from ActivityResultContracts.GetMultipleContents to ActivityResultContracts.OpenMultipleDocuments. Then, your takePersistableUriPermission() calls should work. You can only get persistable Uri permissions on documents obtained via the Storage Access Framework, which is what OpenMultipleDocuments uses.