I have 2 framelayouts which are fragment container.
The problem is that the XML previewer shows nothing.
 The app works and there is no error message.
 I tried to add tools:showIn="@layout/..." in the different framelayouts but it did not work.
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.sarahpoehler.testapp.MainActivity">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <FrameLayout
            android:id="@+id/container_fragment_one"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <FrameLayout
            android:id="@+id/container_fragment_two
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</ScrollView>

