Thanks Carson,
I am not using MyMeetingActivity , I am using https://github.com/zoom/zoom-sdk-android/blob/master/mobilertc-android-studio/example2/src/main/java/us/zoom/sdkexample2/MainActivity.java and back press handling not working.
Is it compulsory to use MyMeetingActivity for webinar or it is OK to use MainActivity.java. If it is OK help me with back press handling. For me code control not coming to back press. if is there any kind of config I need to change do let me know