如何在单选按钮组中将选中的单选按钮设置为默认值? [英] How to set radio button checked as default in radiogroup?

问题描述

我动态创建了RadioGroup和RadioButton，如下所示:

I have created RadioGroup and RadioButton dynamically as following:

RadioGroup radioGroup = new RadioGroup(context);
                    RadioButton radioBtn1 = new RadioButton(context);
                    RadioButton radioBtn2 = new RadioButton(context);
                    RadioButton radioBtn3 = new RadioButton(context);

                    radioBtn1.setText("Less");
                    radioBtn2.setText("Normal");
                    radioBtn3.setText("More");

                    radioBtn2.setChecked(true);

                    radioGroup.addView(radioBtn1);
                    radioGroup.addView(radioBtn2);
                    radioGroup.addView(radioBtn3);

在这里，步骤radioBtn2.setChecked(true);导致始终会检查radioBtn2.这意味着我无法通过检查其他两个单选按钮(radioBtn1，radioBtn3)来取消选中radioBtn2.我要使RadioGroup一次只能检查一个单选按钮(现在它一次可以检查两个单选按钮).

Here step radioBtn2.setChecked(true); causes radioBtn2 always checked. That means I cannot uncheck radioBtn2 by checking other two radio buttons (radioBtn1,radioBtn3). I want to make that RadioGroup can check only one radio button at a time (Now it can check two radiobutton at a time).

我该如何解决这个问题?

How can I solve this problem?

推荐答案

您应该像这样检查单选组中的单选按钮:

you should check the radiobutton in the radiogroup like this:

radiogroup.check(IdOfYourButton)

当然，您首先必须为单选按钮设置一个ID

Of course you first have to set an Id to your radiobuttons

我忘了，radioButton.getId()也可以，Ramesh

i forgot, radioButton.getId() works as well, thx Ramesh

android:checkedButton="@+id/my_radiobtn"

在radiogroup xml中工作

works in radiogroup xml

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