how can i align my floating button to the bottom of the page in android studio

Question

//Parent View

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/back4">

//Relative Layout Child of ScrollView

<RelativeLayout  

        android:layout_width="match_parent"    
        android:layout_height="match_parent"
        android:layout_marginTop="40dp">

//Grid View with Parent Relative Layout. Grid View not allowing floating button to align bottom

    <GridView
            android:id="@+id/gridview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:verticalSpacing="50dp">

    </GridView>

//Floating Button adding to Bottom of screen

    <com.google.android.material.floatingactionbutton.FloatingActionButton   

            android:id="@+id/addNew"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/gridview"
            android:layout_alignParentEnd="true"
            android:src="@drawable/addbutton"/>

//End of Relative Layout

</RelativeLayout>

//End of Scroll View

Answer 1

Make some changes to your FloatingActionButton XML. Hope this works for you!

<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:id="@+id/addNew"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentEnd="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentBottom="true"
    android:layout_margin="16dp"
    android:src="@drawable/addbutton" />

Also, there is no need of vertically scrolling ScrollView as GridView is also a vertically scrolling widget(GridView).