ConstraintLayout，RadioGroup和RadioButton的两列 [英] ConstraintLayout, RadioGroup and two columns of RadioButton

问题描述

我有一个ConstraintLayout作为根布局，这很好。

但是我现在有一个RadioGroup，必须在其中创建两列RadioButtons。
因为ConstraintLayout是要摆脱嵌套布局，所以我认为将那些RadioButton放在RadioGroup中并适当地放置它们会很好。

原来有一个ConstraintLayout作为根布局，包含
但是也许我错了。

I have a ConstraintLayout as a root Layout and it's fine.
However I now have a RadioGroup where I have to make two columns of RadioButtons within it. Since ConstraintLayout is about getting the rid of Nested Layouts, I thought it would be fine placing those RadioButtons in the RadioGroup and place them appropriately.
Turns out having a ConstraintLayout as a Root layout, Containing the RadioGroup, doesn't seem to change anything.
But maybe I'm wrong.

你们如何实现在RadioGroup中具有两排RadioButton，

How would you guys achieve having two rows of RadioButtons within a RadioGroup, which is inside a ConstraintLayout?

干杯

推荐答案

视图必须使用其直接父级的布局属性。例如，您不能将 RadioButton s与 layout_constraint s一起使用，因为直接父级是 RadioGroup 和 RadioGroup 不知道如何解释这些属性。

Views have to use layout attributes of their direct parent. You can't, for instance, have RadioButtons with layout_constraints, because the direct parent is a RadioGroup and RadioGroup doesn't know how to interpret those attributes.

RadioGroup 扩展了 LinearLayout ，所以最好使用单个 RadioGroup 是 RadioButton s的一行或一列。您可能在布局中有两个 RadioGroup s，并且在您的Java代码中监听了两者的更改。

RadioGroup extends LinearLayout, so the best you can do with a single RadioGroup is a single row or column of RadioButtons. You could have two RadioGroups in your layout and in your java code listen for changes on both.

private RadioGroup mGroup1; // init in onCreate
private RadioGroup mGroup2; // init in onCreate

private OnCheckedChangedListener mCheckListener = new OnCheckedChangedListener() {

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        // To make it appear as if the two groups are one large group,
        // checking something in either should clear the check in the other.
        RadioGroup otherGroup = group == mGroup1 ? mGroup2 : mGroup1;
        otherGroup.clearCheck();

        // do something with checkedId
    }
}

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