Android : How to use facebooks "use app" for facebook pages to directly open Android app

I've a facebook page for my Android app and want to link my app. If the app is installed it should launch, otherwise the market should get opened.

I followed the tutorial and it doesn't work...

I added the package, the "appmosphere://android" link in fb

and in the Manifest the intent-filter

<intent-filter>
    <action android:name="android.intent.action.VIEW" />

    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data
        android:host="android"
        android:scheme="appmosphere" />
</intent-filter>