Merge pull request #117 from whuthm/master

Bug: issue-22, when switch horizontal and vertical screen, launcher crash
Merge pull request #36 from heyongjian/master

merge pull request
breakpoint download apk
Merge pull request #119 from lwanghaol/master

wanghao:breakpoint download
Merge pull request #65 from heyongjian/master

huangming:merge the main branch to native branch.