Disable screen rotating on Android [duplicate]

Question

When I press a button, I would like to disable screen rotation on all my activities. How can I do that?

BTW, the phone can be located in landscape or portrait position when the user click the button.

Answer 1

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

Answer 2

You can change your AndroidManifest.xml to

<activity android:name="MainActivity" android:configChanges="orientation">

Which informs the OS that you will handle these config changes (by doing nothing.)

See How do I disable orientation change on Android?