I want to be able to change the display language in my Android application at runtime without the need to restart the app. To do this I believe it is possible to recreate all of the running activities. The problem is I don't have any idea how to get a reference to all activities that haven't been destroyed by the ActivityManager.
Add "locale" property in your android:configChanges in all you activities and then override onConfigurationChanged() in activities and handle the language changes accordingly.
More on http://developer.android.com/guide/topics/manifest/activity-element.html#config