ListLayout - a LinearLayout getting its items from Adapter. Very simple alternative of RecyclerView when a nested list is needed. It wraps its content with just setting wrap_content as height easily in constrast of RecyclerView.

ListLayout.java

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import android.content.Context;
import android.database.DataSetObserver;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Adapter;
import android.widget.LinearLayout;

public class ListLayout extends LinearLayout {
	private Adapter mAdapter;
	private Observer mObserver = new Observer();

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

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

	public ListLayout(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}
	
	public Adapter getAdapter()
	{
		return mAdapter;
	}

	public void setAdapter(Adapter adapter) {
		if (mAdapter != null)
			mAdapter.unregisterDataSetObserver(mObserver);

		mAdapter = adapter;
		adapter.registerDataSetObserver(mObserver);
		mObserver.onChanged();
	}

	private class Observer extends DataSetObserver {
		
		@Override
		public void onChanged() {
			final List<View> oldViews = new ArrayList<View>(getChildCount());

			for (int i = 0; i < getChildCount(); i++)
				oldViews.add(getChildAt(i));

			final Iterator<View> iter = oldViews.iterator();

			removeAllViews();

			for (int i = 0; i < mAdapter.getCount(); i++) {
				View convertView = iter.hasNext() ? iter.next() : null;
				View newView = mAdapter.getView(i, convertView, ListLayout.this);
				addView(newView);
			}
			super.onChanged();
		}

		@Override
		public void onInvalidated() {
			removeAllViews();
			super.onInvalidated();
		}
	}
}