android : NestedScrollview bottom two button attached

Question

I am trying to create Android product layout. In footer have two buttons it is fixed button. you can see images when I am scrolling up bottom two buttons attached in my layout. Please help how can i do?

Image 1

Image 2

after scrolling

xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/coordinate"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.chivazo.chivazoandroid.activities.SingleProductActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/app_bar_height"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginBottom="30dp"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/backdrop"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/a"
                app:layout_collapseMode="parallax" />

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_single_product" />


    <LinearLayout
        android:id="@+id/groupbutton"
        android:weightSum="2"
        android:orientation="horizontal"
        android:layout_gravity="bottom"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >
        <android.support.v7.widget.AppCompatButton
            android:layout_weight="1"
            android:id="@+id/share"
            android:text="share"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <android.support.v7.widget.AppCompatButton
            android:layout_weight="1"
            android:id="@+id/go_wishlist"
            android:text="go to Wishlist"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>


</android.support.design.widget.CoordinatorLayout>

Answer 1

You can use Relativelayout as your outer layout and keep CoordinatorLayout inside it, make Two buttons android:layout_alignParentBottom="true"

 <?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/coordinate"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/groupbutton"
        android:fitsSystemWindows="true"
        tools:context="com.chivazo.chivazoandroid.activities.SingleProductActivity">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/app_bar"
            android:layout_width="match_parent"
            android:layout_height="@dimen/app_bar_height"
            android:fitsSystemWindows="true"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/toolbar_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                app:contentScrim="?attr/colorPrimary"
                app:expandedTitleMarginBottom="30dp"
                app:expandedTitleMarginEnd="64dp"
                app:expandedTitleMarginStart="48dp"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <ImageView
                    android:id="@+id/backdrop"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fitsSystemWindows="true"
                    android:scaleType="centerCrop"
                    android:src="@drawable/a"
                    app:layout_collapseMode="parallax" />

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/AppTheme.PopupOverlay" />

            </android.support.design.widget.CollapsingToolbarLayout>
        </android.support.design.widget.AppBarLayout>

        <include layout="@layout/content_single_product" />
    </android.support.design.widget.CoordinatorLayout>

    <LinearLayout
        android:id="@+id/groupbutton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom"
        android:orientation="horizontal"
        android:weightSum="2">

        <android.support.v7.widget.AppCompatButton
            android:id="@+id/share"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="share" />

        <android.support.v7.widget.AppCompatButton
            android:id="@+id/go_wishlist"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="go to Wishlist" />
    </LinearLayout>
</RelativeLayout>

Answer 2

The app:layout_anchor="@id/anchor_view" and app:layout_anchorGravity="bottom"
are the Important attributes here

 <android.support.design.widget.CoordinatorLayout
            android:id="@+id/coordinator_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            tools:context=".ProductDetailActivity">

     <android.support.design.widget.AppBarLayout
            android:id="@+id/app_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

    <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll">

     <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/colorPrimary"/>

     </android.support.design.widget.CollapsingToolbarLayout>
     </android.support.design.widget.AppBarLayout>

     <android.support.v4.widget.NestedScrollView
                android:id="@+id/nested_scroll"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_behavior="@string/appbar_scrolling_view_behavior">
                .
                .
                .

                <View
                android:id="@+id/anchor_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
                .
                .
                .
                .
      </android.support.v4.widget.NestedScrollView>

     <LinearLayout

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_anchor="@id/anchor_view"
                app:layout_anchorGravity="bottom">

                <Button
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"/>


                <Button
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"/>
            </LinearLayout>
     </android.support.design.widget.CoordinatorLayout>

Answer 3

Simply add your layout in Coordinatorlayout below NestedScrollView in xml and do the following in java.

CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) layoutToBeAnchored.getLayoutParams();
    layoutParams.setAnchorId(R.id.layoutBelowWhichToBeAnchored);
    layoutParams.anchorGravity = Gravity.CENTER;
    layoutToBeAnchored.setLayoutParams(layoutParams);

Hope this helps you guys. For any reference you can check the example at - https://github.com/IsUncommon/Droidcon-India-2015