how to fix portrait orientation for android apps
<activity
android:name="com.example.demo_spinner.MainActivity"
android:label="@string/app_name"
android:screenOrientation="portrait" >
</activity>
<!-- Do this in AndroidMainifest.xml-->
<!--Additionaly, you can also use screenOrientation="sensorPortrait"
if you want to enable rotation by 180 degrees.-->
<!--android:screenOrientation="nosensor"
This will lead to forcing your app to portrait on most phones
and landscape on tablets. -->