Just some android examples

without extra.

module : user-guide (java)

a simple user guide activity with some color gradient effect. here is the effect

module : images_viewer (kotlin)

display a list of images. now the RegionImageView can display a big image without OOM. here we go

imageList	bigImage

module : animation

make possible to control scene transition,and easy to implement.(but it is just a prototype now)

module : cache

provide a simple way to cache a media file when playing...