Fix stroke bugs

Fix stroke bugs

Fix disable state bugs

Fix disable state bugs

Fix warming of ExtendBitmapDrawable

v1.0.4

fix the warmming of ExtendBitmapDrawable

Optmize the core code

v1.0.3

optimize the core code

refactor the core code

v1.0.2

refactor the core code

Compat low sdk version

v1.0.1

update README.md

v1.0.0

release1.0.0

this background library has been pushed to github first time, It has not been tested by most of models of phone. If someone god are interested it, please kindly give me your advice and contribute more code to make it more powerful