Much has been said about 2D barcodes, and the discussion has focused on the format of the 2D barcode itself -- QR Code, Data Matrix, and so on. But equally important is the format of what the barcode ...

This is not a demo like most tutorial saying "build a android video wallpaper", which just create a MediaPlayer with WallpaperSurface as its destination. MediaPlayer cannot crop video, instead it just ...