public class MainActivity extends FragmentActivity {

    private static final ArrayList<String> images = new ArrayList<>(Arrays.asList(
            "http://img1.goodfon.ru/original/1920x1080/d/f5/aircraft-jet-su-47-berkut.jpg",
            "http://www.dishmodels.ru/picture/glr/13/13312/g13312_7657277.jpg",
            "http://img2.goodfon.ru/original/1920x1080/b/c9/su-47-berkut-c-37-firkin.jpg"
    ));
    private static final String movieUrl = "http://www.sample-videos.com/video/mp4/720/big_buck_bunny_720p_1mb.mp4";

    private ScrollGalleryView scrollGalleryView;

    @Override protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        List<MediaInfo> infos = new ArrayList<>(images.size());
        for (String url : images) infos.add(MediaInfo.mediaLoader(new PicassoImageLoader(url)));

        scrollGalleryView = (ScrollGalleryView) findViewById(R.id.scroll_gallery_view);
        scrollGalleryView
                .setThumbnailSize(100)
                .setZoom(true)
                .setFragmentManager(getSupportFragmentManager())
                .addMedia(MediaInfo.mediaLoader(new DefaultImageLoader(R.drawable.wallpaper1)))
                .addMedia(MediaInfo.mediaLoader(new DefaultImageLoader(toBitmap(R.drawable.wallpaper7))))
                .addMedia(MediaInfo.mediaLoader(new MediaLoader() {
                    @Override public boolean isImage() {
                        return true;
                    }

                    @Override public void loadMedia(Context context, ImageView imageView,
                                                    MediaLoader.SuccessCallback callback) {
                        imageView.setImageBitmap(toBitmap(R.drawable.wallpaper3));
                        callback.onSuccess();
                    }

                    @Override public void loadThumbnail(Context context, ImageView thumbnailView,
                                                        MediaLoader.SuccessCallback callback) {
                        thumbnailView.setImageBitmap(toBitmap(R.drawable.wallpaper3));
                        callback.onSuccess();
                    }
                }))
                .addMedia(MediaInfo.mediaLoader(new DefaultVideoLoader(movieUrl, R.mipmap.default_video)))
                .addMedia(infos);
    }

    private Bitmap toBitmap(int image) {
        return ((BitmapDrawable) getResources().getDrawable(image)).getBitmap();
    }
}