Android锁定屏幕方向，保持onCreate（）不变

Question

I am running something in onCreate() upon initialisation.

If a user rotates the screen, it recalls onCreate().

I want to disable screen rotation and let onCreate() run ONLY upon the initial initialisation.

Is it enough to add android:screenOrientation="portrait" to the manifest or will onCreate() still be run?

Thanks!

Answer 1

If you put android:screenOrientation="portrait" in your Manifest the Phone doesnt handle orientation changes and onCreate() doesn't get called again. So: YES it is enough!

You can easily check it if you set a Debug-Marker in your onCreate() and then rotate your phone!

Answer 2

If you hold your Activity in Portrait or in Landscape , the rotation will no longer happens. So the onCreate() will run to the end though you will try to rotate your device

Answer 3

Add in your manifest:

 android:configChanges="orientation"
 android:screenOrientation="portrait"