Merge pull request #26 from heyongjian/master

huangming:merge the main branch to native branch.
Merge pull request #27 from heyongjian/master

huangming:merge the main branch to native branch.
huangming:add the backup and recover function for joy launcher.
Merge pull request #36 from whuthm/master

huangming:add the backup and recover function for joy launcher.