Can't read thumbnails on Android 10 (loadThumbnail)

Question

I'm reading thumbnails from the device by querying the MediaStore, using MediaStore.Images.Thumbnails.getThumbnail(). However, this has been deprecated in Android 10 (API 29), with a pointer to ContentResolver#loadThumbnail: https://developer.android.com/reference/android/provider/MediaStore.Images.Thumbnails

However, I can't get this to work (in an emulated device running API 29). I've copied some JPEGs onto the emulated device, which end up in the Downloads folder. They show up fine in the Photos app. The following code gives me a FileNotFoundException. What does "No content provider" actually tell me?

try {

    Size thumbSize = new Size(100, 100);
    Uri thumbUri = Uri.fromFile(new File(imgPath));
    // imgPath: /storage/emulated/0/Download/pexels-photo-323490.jpeg
    // thumbUri: file:///storage/emulated/0/Download/pexels-photo-323490.jpeg

    Bitmap thumbBitmap;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        thumbBitmap = mContext.getContentResolver().loadThumbnail(thumbUri, thumbSize, null);
    } else {
        thumbBitmap = MediaStore.Images.Thumbnails.getThumbnail(mContext.getContentResolver(),
                imgId, MediaStore.Images.Thumbnails.MINI_KIND, null);
    }

    iconView.setImageBitmap(thumbBitmap);
} catch (Exception e) {
    Log.e("err", e.toString());
}

Exception:

java.io.FileNotFoundException: No content provider: file:///storage/emulated/0/Download/pexels-photo-323490.jpeg

Answer 1

Please try this, hope it works for You:

int thumbColumn = cur.getColumnIndexOrThrow(MediaStore.Images.ImageColumns._ID); 
int _thumpId = cur.getInt(thumbColumn); 
Uri imageUri_t = ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,_thumpId);

GGK

Answer 2

The best Answer for getting Thumbnail and All Android Versions is this:

val thumbnail: Bitmap = if ((Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)) {
    mContentResolver.loadThumbnail(contentUri, Size(width / 2, height / 2), null)
} else {
    MediaStore.Images.Thumbnails.getThumbnail(mContentResolver, id, MediaStore.Images.Thumbnails.MINI_KIND, null)
}