I can't see the output when I change my orientation on device in Android

In my project I am able to render pdf and my problem is when I am opening a page and changing my orientation the开发者_运维问答 application is crashing in the emulator. When I check it on device it is opening the home page. How can I overcome this problem?

When I open a page I want to see the same page when I change the orientation.

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Basically when you change orientation, it will restart activity. So you have to store your state in orientation change.

You can get better info, go through this link.