Forcing “portrait” orientation mode for android application

Adding following code segment in AndroidManifest file for each activity, we can force the android application to work only in portrait mode.

Note: Don't apply the orientation to the application element, instead you should apply the attribute to the activity element, and you must also set configChanges as noted below.

<activity
   android:screenOrientation="portrait"
   android:configChanges="orientation|keyboardHidden">
</activity>