Audio and Video not working in Android Phone

[days4]

Hello, I am creating an app using bbb-air-client to attend a session.I am able to join the meeting and getting the slides properly. But the problem is ,i am not able to get the audio and video in my app.Also when i change the meeting mode(listen only etc.) the connection drops. When i open camera in my mobile then a frame appears on presenter side but video is not displayed. Similarly when webcam is open at presenter then presenter name and camera icon is visible in the app not actual video. Please help to resolve this problem.
i am using adobe air ver 18 and android ver 5 (lollipop). and handsets to test are lenovo a7000, Karbonn A9+
Thanks