如何以编程方式设置 layout_weight? [英] How to set layout_weight programmatically?

问题描述

免责声明:AFAIK 这个问题到目前为止 XAMARIN ANDROID 没有答案.Android/Java 已多次回答此问题.

Disclaimer: AFAIK This question has no answer so far for XAMARIN ANDROID. It has been answered multiple times for Android/Java.

我的问题是我没有将 layout_weight 作为参数的 GridLayoutParams 的构造函数重载...

My problem is that I have no constructor overload for GridLayoutParams that takes the layout_weight as a parameter...

以下是我尝试通过代码复制的 XML:

The following is the XML I'm trying to replicate by code:

    android:layout_width="0sp"
    android:layout_height="wrap_content"
    android:layout_weight="1"

不设置 layout_weight 会使控件(复选框)不可见.

Not setting layout_weight makes the control (a checkbox) simply invisible.

这是我使用 Xamarin Android 代码的位置:

Here is where I am with the Xamarin Android code:

            CheckBox cb = new CheckBox(this);
            cb.Id = View.GenerateViewId();
            GridLayout.LayoutParams cbButtonLayoutParams = new GridLayout.LayoutParams();
            cbButtonLayoutParams.RowSpec = GridLayout.InvokeSpec(row, 1);   // Setting row and rowspan respectivly
            cbButtonLayoutParams.ColumnSpec = GridLayout.InvokeSpec(column, 1);    // Setting col and colspan respectivley
            cbButtonLayoutParams.Width = 0;
            cbButtonLayoutParams.Height = GridLayout.LayoutParams.WrapContent;
            cbButtonLayoutParams.SetGravity(GravityFlags.Center);
            // How do I set the weight ? There is no property nor constructor...
            // cbButtonLayoutParams.???
            cb.LayoutParameters = cbButtonLayoutParams;

感谢任何帮助.

推荐答案

在各自的Spec下.

cbButtonLayoutParams.RowSpec.weight = 1; //might be Weight in C#
cbButtonLayoutParams.ColumnSpec.weight = 1;

我不确定您想要行权重还是列权重，但这就是您对两者的处理方式.

I'm not sure if you want the row weight or the column weight, but that's how you do it for both.

我相信InvokeSpec()等价于spec()，也就是说第二个参数应该是权重，只要两个参数都是Int32.

I believe that InvokeSpec() is equivalent to spec(), which means the second parameter should be the weight, as long as both parameters are Int32.

此外，layout_weight 通常仅用于当该元素的父元素是 LinearLayout 时.您确定 CheckBox 实际上是添加到 GridLayout 而不是 LinearLayout 子项吗?

Also, layout_weight is usually only for when the parent of that element is a LinearLayout. Are you sure that the CheckBox is actually being added to the GridLayout and not a LinearLayout child?

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