Merge pull request #85 from heyongjian/master

huangming:merge the main branch to native branch.
fix bug issue-43,the appearance of notification icon is different.

fixed the icon size
Merge pull request #179 from whuthm/master

fix bug issue-43,the appearance of notification icon is different.
Merge pull request #184 from lwanghaol/master

wanghao:fix bug issue-45,add the default file type
Merge pull request #58 from heyongjian/master

pull request