Fixed: Andorid ExpandableListView issue With CollapsingToolbarLayout

RecyclerView , Listview, Gridview or ExpandableListview doesn't work inside Scrollview when used with CollapsingToolbarLayout.

When you try to scroll the List Its scrolling behaviour doen't work.

To make it work you must override  this onMeasure(); of Your ListView or whatever type of List you're using.

@Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
                Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
        ViewGroup.LayoutParams params = getLayoutParams();
        params.height = getMeasuredHeight();
    }

You can use NonScrollExpandableListView you can achieve non-scroll property of any Lisview or GridView or ExpandableListView by overriding following method.So for using NonScrollExpandableListView you need to make one custom class.

public class NonScrollExpandableListView extends ExpandableListView {

    public NonScrollExpandableListView(Context context) {
        super(context);
    }

    public NonScrollExpandableListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NonScrollExpandableListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
                Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
        ViewGroup.LayoutParams params = getLayoutParams();
        params.height = getMeasuredHeight();
    }
}

Implementing this in our CollapsingToolbarLayout.

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/root_coordinator"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

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

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways">


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                app:layout_collapseMode="parallax">


                <android.support.v7.widget.Toolbar
                    android:id="@+id/budget_app_bar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:background="@drawable/gradient"
                    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                    app:layout_collapseMode="pin" />

                
                <TextView
                    android:id="@+id/category_count_TV_budget_activity"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@drawable/gradient"
                    android:paddingLeft="@dimen/sixteen_dp"
                    android:paddingStart="@dimen/sixteen_dp"
                    android:paddingTop="@dimen/eight_dp"
                    android:text="Some text"
                    android:textColor="@color/white"
                    android:textSize="@dimen/sixteen_sp" />

            </LinearLayout>


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


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

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        app:layout_anchor="@id/app_bar_layout"
        app:layout_anchorGravity="bottom"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <com.tacktile.contassist.helper.classes.NonScrollExpandableListView
            android:id="@+id/expandable_list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:divider="@null"
            android:focusable="false"
            android:groupIndicator="@null"
         />
    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

customise this above xml as per your requirement.

Now this will work with your ExpandableListView. Fixed!!

SRC: https://stackoverflow.com/a/37605908/3863332

This Blog is written in short to solve the problem only. I'm not professional Blogger but like to write for others in the same problem.

Feel free to ask anything.
Thanks