I tried to install Oracle Mobile Framework in JDeveloper 12c through Help -> Check updates.
It successfully downloaded and asked me to restart the IDE to install the downloaded updates.
I continued with restart procedure, but Oracle JDeveloper Studio doesn't get started.
After long time, I started IDE manually and tried Creating New Application -> mobile framework application, It doesn't shows.
Again gone through Checking for updates.. then it's shows below screen

Continued with NO. It asks me to restart the IDE again.

Any other way install Mobile framework?? Or any solution for this??
I had the same problem. What you need to do is choose 'No' when JDeveloper asks you to restart now. Close JDeveloper yourself and start it up yourself. (Note: It may take some time for JDeveloper to start up so be patient!)