I want my android application to be only run in portrait mode? How can I do that?
In the manifest, set this for all your activities:
<activity android:name=".YourActivity"
android:configChanges="orientation"
android:screenOrientation="portrait"/>
Let me explain:
android:configChanges="orientation"
you tell Android that you will be responsible of the changes of orientation.android:screenOrientation="portrait"
you set the default orientation mode.