Merge pull request #32 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #33 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #34 from heyongjian/master

huangming:merge the main branch to native branch.
huangming:add the online wallpaper function for joy launcher.
Merge pull request #49 from whuthm/master

huangming:add the online wallpaper function for joy launcher.