Make ListView full size as its Items

import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.ListView;


public class ScrollableListView extends ListView 

{

    boolean expanded = true;

    public ScrollableListView(Context context)

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

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

    {        super(context, attrs, defStyle);
    }
    public boolean isExpanded() 

    {        return expanded;
    }
    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) 

    {       
        if (isExpanded())

        {            

          int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
          super.onMeasure(widthMeasureSpec, expandSpec);

            ViewGroup.LayoutParams params = getLayoutParams();
            params.height = getMeasuredHeight();
        } 

        else

        {            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }
    public void setExpanded(boolean expanded) 

    {        this.expanded = expanded;
    }
}