Xamarin，Android：以编程方式更改线性布局的大小

Question

here is my code:

        linlay = FindViewById<LinearLayout>(Resource.Id.linlay_profile);
        LinearLayout.LayoutParams _params = new LinearLayout.LayoutParams
            (500, 500);
        linlay.LayoutParameters = _params;

So, in my xml, there is a linearlayout with a height 0f 200. Now, in the programcode I need to change the height to 500. But it crashes on the last bit of code:

    linlay.LayoutParameters = _params;

Why is that?

Thank you!

Answer 1

I just stumbled upon the solution: appearently, the layoutparams have to be of the parent. in my case this was a framelayout. dont get it either but its working now.

        linlay = FindViewById<LinearLayout>(Resource.Id.linlay_profile);
        FrameLayout.LayoutParams _params = new FrameLayout.LayoutParams
            (ViewGroup.LayoutParams.FillParent, 
            (Resources.DisplayMetrics.HeightPixels / 3));
        linlay.LayoutParameters = _params;