protected override void OnLayout(bool changed, int l, int t, int r, int b) { base.OnLayout(changed, l, t, r, b); var msw = MeasureSpec.MakeMeasureSpec(r - l, MeasureSpecMode.Exactly); var msh = MeasureSpec.MakeMeasureSpec(b - t, MeasureSpecMode.Exactly); picker.Measure(msw, msh); picker.Layout(0, 0, r - l, b - t); }