The answer from V-rund Puro-hit is what worked for me. But it took some modifications to work with Kotlin supporting API >19. So for the purpose of saving someone time, here it is:
Create a new class file NonScrollExpandableListView:
import android.content.Context
import android.util.AttributeSet
import android.widget.ExpandableListAdapter
import android.widget.ExpandableListView
class NonScrollExpandableListView : ExpandableListView {
constructor(context: Context) : super(context) {}
constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}
constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle) {}
override fun setAdapter(adapter: ExpandableListAdapter?) {
super.setAdapter(adapter)
}
override fun setOnChildClickListener(onChildClickListener: OnChildClickListener) {
super.setOnChildClickListener(onChildClickListener)
}
override fun expandGroup(groupPos: Int) : Boolean {
return super.expandGroup(groupPos)
}
override fun expandGroup(groupPos: Int, animate: Boolean) : Boolean {
return super.expandGroup(groupPos, animate)
}
override fun isGroupExpanded(groupPosition: Int): Boolean {
return super.isGroupExpanded(groupPosition)
}
public override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
val heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE shr 2, MeasureSpec.AT_MOST)
super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom)
val params = layoutParams
params.height = measuredHeight
}
}
...and I use it like so:
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<com.example.you.kotlinlistview.NonScrollExpandableListView
android:id="@+id/expandableCategories"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/add_new_feed"
android:drawableStart="@drawable/ic_add"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Add new feed"
/>
<Button
android:id="@+id/settings_button"
android:drawableStart="@drawable/ic_settings"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Settings"
/>
<Button
android:id="@+id/logout_button"
android:drawableStart="@drawable/ic_exit"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Log Out"
/>
</LinearLayout>
</ScrollView>
As a result, I can comfortably add buttons and other elements to NavigationView side drawer) and it all works nicely in one common ScrollView. Main usage here is when you need to combine multiple ListViews and ExpandableListViews inside the one common ScrollView which would take care of scrolling.
