Merge pull request #231 from whuthm/master

fix bug JOYL-63, the background turns white when click the preview button.
Merge pull request #70 from heyongjian/master

pull
fix bug:JOYL-95,can not re-download the built-in software when re-networking
fix bug:JOYL-96,continue to download when update the built-in virtual Shoutcut list
Merge pull request #233 from lwanghaol/master

 fix bug:JOYL-96,continue to download when update the built-in virtual Shoutcut list
Merge pull request #235 from whuthm/master

fix bug JOYL-99, network info is null when the mobile does not have sim card.
Merge pull request #100 from heyongjian/master

huangming:merge the main branch to native branch.