My app has the feature of being launched from the browser if the user clicks on a particular type of URL. This thing works well on any android phones except the Google Nexus having ICS. With Nexus, when I click on a URL which can open my app, the app opens properly, but if i go to home screen and click on the app icon, even that opens up. So now I can see my app opened in the browser app as well as my own app, simultaneously. I saw the same behavior with other apps too. like the play store or twitter. Wondering if this is okay or can cause some issues.
It should be considered indifferent, neither OK nor bad - however, you could always make use of the Activity available via the AndroidManifest.xml so that you only keep one instance of the given Activity available.
Parameters on the <activity /> level in the manifest:
android:launchMode="singleTask"
<!-- OR -->
android:launchMode="singleInstance"