Question

I have the following code;

String[] projection = { MediaStore.Video.VideoColumns._ID, MediaStore.Video.VideoColumns.DATA };
                //String selection = MediaStore.Video.VideoColumns.KIND + "=" + MediaStore.Video.VideoColumns.;
                String sort = MediaStore.Video.VideoColumns._ID + " DESC";

                Cursor myCursor = getActivity().managedQuery(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, projection, null, null, sort);


                try
                {
                    myCursor.moveToFirst();
                    Log.d("VIDEO_URI", intent.getDataString());
                    Bitmap bitmap = MediaStore.Video.Thumbnails.getThumbnail(
                            getActivity().getContentResolver(), myCursor.getLong(myCursor.getColumnIndexOrThrow(MediaStore.Video.VideoColumns._ID)),
                            MediaStore.Video.Thumbnails.MICRO_KIND,
                            (BitmapFactory.Options) null );

                    ImageView iv = (ImageView) getActivity().findViewById(R.id.attached_media_image);

                    //Log.d("IMAGE", curThumb.toString());

                    iv.setImageBitmap(bitmap);

                }
                catch (Exception e) {
                    // TODO: handle exception
                    Log.e("ERROR", e.toString());
                }

I get the following in my LogCat when this is ran;

03-13 12:05:14.740: D/VIDEO_URI(7269): content://media/external/video/media/474

But it doesn’t set the image of the iv to anything, and when I try to run the Log.d(“IMAGE”, curThumb.toString()); line, that is commented out in this example, it throws a null exception.

Any help would be much appreciated thank you.

Answer 1

The thumbnail generation is not guaranteed to succeed since the part that generates thumbnails cannot do so for some video codecs. The returned Bitmap will be null in that case.

• Have you checked if bitmap != null?
• Do you get a thumbnail for the Video in e.g. the Gallery app?
• What is curThumb, I can see no definition of that in your code.

Edit: Your error is that you use the ID from the thumbnails table not the id of the video.
All you need to do is to get the Bitmap this way:

        Bitmap bitmap = MediaStore.Video.Thumbnails.getThumbnail(
                getActivity().getContentResolver(),
                ContentUris.parseId(intent.getData()),
                MediaStore.Video.Thumbnails.MICRO_KIND,
                (BitmapFactory.Options) null );

Api Doc says: “origId: Original image id associated with thumbnail of interest.”