Merge pull request #18 from heyongjian/master

merger
fix bug issue-2：preferences in hotseat make launcher crash
Merge branch 'master' of https://github.com/heyongjian/joy_launcher
Merge pull request #39 from lwanghaol/master

Merge pull request #18 from heyongjian/master
Merge pull request #19 from heyongjian/master

merger
Merge pull request #40 from lwanghaol/master

Merge pull request #19 from heyongjian/master
wanghao:joyfolder accept the network info and display
wanghao:add the backup and recover for desktop
Merge pull request #41 from lwanghaol/master

wanghao:joyfolder accept the network info and display
Merge pull request #20 from heyongjian/master

merger
Merge pull request #42 from lwanghaol/master

Merge pull request #20 from heyongjian/master
Merge pull request #21 from heyongjian/master

Merge pull request #42 from lwanghaol/master
Merge pull request #43 from lwanghaol/master

Merge pull request #21 from heyongjian/master
Merge pull request #30 from heyongjian/master

huangming:merge the main branch to native branch.