问题
How can make my android application to be Landscape or portrait but without the reverse directions?
Meaning that I want to enable SCREEN_ORIENTATION_PORTRAIT and SCREEN_ORIENTATION_LANDSCAPE but to disable SCREEN_ORIENTATION_REVERSE_LANDSCAPE and SCREEN_ORIENTATION_REVERSE_PORTRAIT.
Thanks
回答1:
I had the same problem/feature request in my camera app, and found this post:
android camera surfaceview orientation
In changeRotation just comment ORIENTATION_PORTRAIT_INVERTED and ORIENTATION_LANDSCAPE_INVERTED, and create a method rotateViews(int degrees) to rotate all of the images(buttons) of your layout when switching between regular landscape/portrait.
Also,
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
worked better for me than
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR | ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
回答2:
Make sure you notify the system that you want to handle orientation changes by adding "orientation" to the android:configChanges flag attribute in the activity tag in your manifest file.
Override Activity.onConfigurationChanged() and inspect the Configuration.orientation field in the passed
Configurationparameter and set the orientation of the activity to either ActivityInfo.SCREEN_ORIENTATION_PORTRAIT or ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE using Activity.setRequestedOrientation appropriately.
来源：https://stackoverflow.com/questions/5927486/android-lock-orientation-to-two-directions-only