v0.5.2

fix bugs.

v0.5.1

fix some bugs.

v0.5

update version

v0.4.4

fix one major issue.

v0.4.3

fix some issues.

v0.4.2

1. bug fix.
2. channel qr code.

V0.4 is ready.

fix some minor bugs.

V0.3 is ready.

fix some bugs.

This is a pre-release.

v0.2

request draw overlay permission firstly when lauch