How to add rotation effect when portrait to landscape

Question

How to add rotation effect when change mode portrait to landscape ?

I want to make it smooth .

Please help me.

I want to sleep. T-T

Answer 1

I believe this is handled by Android so you can't really change it without making your own custom ROM.

Answer 2

You can set android:configChanges="orientation" on your Activity and then implement onConfigurationChanged() on the Activity.