How do I pin a View from a NestedScrollView at the bottom of the screen?-CodePudding

I have a RecyclewView and a button below it, it's all inside the NestedScrollView. If I add more items to the RecyclerView, the button will hide.

Is there a way to attach the button to the bottom of the screen if there are a lot of elements, and to the bottom of the RecyclerView if it fits on the screen?

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <androidx.recyclerview.widget.RecyclerView
                android:id="@ id/recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:itemCount="3"
                tools:listitem="@layout/form_field" />

            <Button
                android:id="@ id/send_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="Click me" />

        </LinearLayout>

    </androidx.core.widget.NestedScrollView>

It should be like this:

CodePudding user response：

Try to use a ConstraintLayout instead of LinearLayout. Set the constraint of the button on the left, bottom, top and right of the screen in te XML file.

CodePudding user response：

You can take that view out of the NestedScrollView. like this:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.core.widget.NestedScrollView
        android:layout_above="@id/send_button"
        android:id="@ id/scroll_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <androidx.recyclerview.widget.RecyclerView
                android:id="@ id/recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:itemCount="3"
                tools:listitem="@layout/form_field" />

        </LinearLayout>

    </androidx.core.widget.NestedScrollView>

    <Button
        android:layout_marginBottom="10dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:id="@ id/send_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Click me" />
    
</RelativeLayout>

CodePudding user response：

<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:fillViewport="true" >

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginTop="15px" >

    <!-- bunch of components here -->

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@ id/spinner"
        android:layout_marginTop="5px"
        android:gravity="center_horizontal|bottom"
        android:paddingTop="2px" >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="20px"
            android:paddingRight="20px"
            android:text="Delete" />
    </LinearLayout>
</RelativeLayout>