Oh! Did some more reading and decided that there was a useful API called
getBitmap within the MediaStore.Images.Media. Remarkably, by throwing a
heap of code away that had evolved due to following Internet discussions, I
came up with this solution that works reliably on Google photos that have
to be downloaded before being available. Presumably, those nice people at
Android know about what goes on with a download and handle it gracefully.
@Override
protected Bitmap doInBackground(Uri... image) {
try {
Bitmap bm =
MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), image[0]);
return ThumbnailUtils.extractThumbnail(bm, THUMBSIZE, THUMBSIZE);
} catch (Exception e) {
return null;
}
}
On Tuesday, 15 November 2016 10:22:19 UTC, Ian Spencer wrote:
>
> I have a decent set of code to handle the Intent, absolutely stock, using
> AsyncTask to process the result of the download.
>
> This works perfectly when the selected photo is anywhere on the phone, but
> Gallery also shows my lovely collection of 27,000 photos. When I select an
> image from there, Android kindly downloads the picture onto the phone.
> However, nearly every time, that photo will fail to display - there is data
> there, but it fails trying to extract the bitmap, which for the moment I am
> using
>
> Watching what it is going on, my educated guess is that OnActivityResult
> returns with RESULT_LOAD_IMAGE and RESULT_OK after the file has been
> created locally, but not before the file has completed downloading. (I'm
> going to hack a time delay loop to test this theory).
>
> Is this a) An Android/Gallery bug?
> b) The wrong event to monitor and there is actually another
> event emitted by the gallery process?
> c) The right event but there is some data in the intent.Data
> that I can check to find out if the downloaded file is complete (e.g. a
> embedded length and an actual length?)
> d) Working as designed and I should actually put in a hack to
> work around like a test every second to see if I finally get a picture
> (expensive!)?
>
> @Override
> public void onActivityResult(int requestCode, int resultCode, Intent data) {
> super.onActivityResult(requestCode, resultCode, data);
>
> Log.i(TAG,"Begin onActivityResult");
> // When an Image is picked
> if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK
> && null != data) {
> // Get the Image from data
> Log.i(TAG, "Believe I have something useful to load");
> Uri selectedImage = data.getData();
> BackgroundGetImage doGetImage = new
> BackgroundGetImage(getActivity(),"Please wait...");
> doGetImage.delegate = this;
> doGetImage.execute(selectedImage);
> } else {
> Toast.makeText(getActivity(), "You haven't picked Image",
> Toast.LENGTH_LONG).show();
> }
> }
>
>
> @Override
> protected Bitmap doInBackground(Uri... image) {
> Log.i(TAG,"Getting image info");
> String[] filePathColumn = { MediaStore.Images.Media.DATA };
>
> // Get the cursor
> Cursor cursor = getContext().getContentResolver().query(image[0],
> filePathColumn, null, null, null);
> // Move to first row
> cursor.moveToFirst();
>
> int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
> if (columnIndex < 0) {
> Log.i(TAG, "Invalid image");
>
> return null;
> }
> imgDecodableString = cursor.getString(columnIndex);
> cursor.close();
> Log.i(TAG, "Getting thumbnail");
>
> Bitmap ThumbImage =
> ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(imgDecodableString),
> THUMBSIZE, THUMBSIZE);
> if (ThumbImage != null) {
> Log.i(TAG, "Got thumbnail");
>
> } else {
> Log.i(TAG, "Thumbnail null");
> }
> return ThumbImage;
>
> }
>
>
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