Android Blog: Android Orientation changes With out reload Activity?

In API level 13 or above, the screen size changes when the orientation changes, so this still causes the activity to be destroyed and started when orientation changes.

Simply add the "screenSize" attribute in `Androidmanifest.xml`

<activity
    android:name=".YourActivityName"
    android:configChanges="orientation|screenSize">
</activity>

Now, when your change orientation (and screen size changes), the activity keeps its state and onConfigurationChanged() is called. This will keep whatever is on the screen.

Reference: See this Articals

1). http://developer.android.com/guide/topics/resources/runtime-changes.html

2).http://developer.android.com/guide/topics/manifest/activity-element.html

And here is Another way see picture