CODEWITHSUNDEEP
androidandroid-contentproviderandroid-gallerymediastore
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Reputation: 44278

MediaStore.Images.Media is not capable of showing all images, solution

doing a query with MediaStore.Images.Media does not show all images whether it is querying internal content or external content

The results (the thumbnails and the location those thumbnails are retrieved from) are not the same across even mainstream devices. Devices with no SD card and only internal storage have different image results, Samsung devices have different kinds of results, Google devices have different kinds of results.

Specifically with this code that is used around stackoverflow as a solution,

            final String[] columns = {MediaStore.Images.Thumbnails._ID};
            final String orderBy = MediaStore.Images.Media._ID;
            Cursor imagecursor = context.getContentResolver().query(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns,
                    null, null, orderBy);
            if (imagecursor != null) {
                int image_column_index = imagecursor
                        .getColumnIndex(MediaStore.Images.Media._ID);
                int count = imagecursor.getCount();
                for (int i = 0; i < count; i++) {
                    imagecursor.moveToPosition(i);
                    int id = imagecursor.getInt(image_column_index);
                    ImageItem imageItem = new ImageItem();
                    imageItem.id = id;
                    lastId = id;
                    imageItem.img = MediaStore.Images.Thumbnails.getThumbnail(
                            context.getApplicationContext().getContentResolver(), id,
                            MediaStore.Images.Thumbnails.MINI_KIND, null);
                    images.add(imageItem);
                }
                imagecursor.close();

I look at the code and it seems sound, but I need a better solution because results vary, and on some devices I have no idea where the resulting thumbnails have been pulled from

Upvotes: 0

Views: 5667

Answers (1)

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Reputation: 44278

As @danny117 pointed out to me, trying to get THUMBNAILS was a flawed assumption. One cannot rely on the existence of thumbnails for every image in the android system.

So I ultimately retrieve all images based on mime type, and use the Files MediaStore

 String[] projection = {
            MediaStore.Files.FileColumns._ID,
            MediaStore.Files.FileColumns.DATA,
            MediaStore.Files.FileColumns.DATE_ADDED,
            MediaStore.Files.FileColumns.MEDIA_TYPE,
            MediaStore.Files.FileColumns.MIME_TYPE,
            MediaStore.Files.FileColumns.TITLE
    };

    // Return only video and image metadata.
    String selection = MediaStore.Files.FileColumns.MEDIA_TYPE + "="
            + MediaStore.Files.FileColumns.MEDIA_TYPE_IMAGE
            + " OR "
            + MediaStore.Files.FileColumns.MEDIA_TYPE + "="
            + MediaStore.Files.FileColumns.MEDIA_TYPE_VIDEO;

    Uri queryUri = MediaStore.Files.getContentUri("external");

    CursorLoader cursorLoader = new CursorLoader(
            getActivity(),
            queryUri,
            projection,
            selection,
            null, // Selection args (none).
            MediaStore.Files.FileColumns.DATE_ADDED + " DESC" // Sort order.
    );


    images.clear();
    /*
        final String[] columns = {MediaStore.Images.ImageColumns._ID, MediaStore.Images.ImageColumns.DATE_ADDED};
        final String orderBy = MediaStore.Images.Media.DATE_ADDED + " DESC";
        Cursor imagecursor = getActivity().getContentResolver().query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns,
            null, null, orderBy);
    */

    Cursor imagecursor = cursorLoader.loadInBackground();

    if (imagecursor != null) {
        int image_column_index = imagecursor
                .getColumnIndex(MediaStore.Files.FileColumns._ID);
        int type_column_index = imagecursor.getColumnIndex(MediaStore.Files.FileColumns.MIME_TYPE);
        int count = imagecursor.getCount();
        for (int i = 0; i < count; i++) {
            imagecursor.moveToPosition(i);
            int id = imagecursor.getInt(image_column_index);
            String mime_type = imagecursor.getString(type_column_index);
            ImageItem imageItem = new ImageItem();
            imageItem.id = id;
            //lastId = id;

            if(!mime_type.contains("video"))
                imageItem.uriString = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(id)).toString();
            else
                imageItem.uriString = MediaStore.Video.Media.EXTERNAL_CONTENT_URI.withAppendedPath(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, String.valueOf(id)).toString();



            images.add(imageItem);
        }

        //add ImageItem at top of list

        imagecursor.close();
    }

Upvotes: 2

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