Java 如何在 Android 中获取 RadioGroup 的选定索引

How to get the selected index of a RadioGroup in Android

提问by John Boker

Is there an easy way to get the selected index of a RadioGroup in Android or do I have to use OnCheckedChangeListener to listen for changes and have something that holds the last index selected?

有没有一种简单的方法可以在 Android 中获取 RadioGroup 的选定索引，或者我是否必须使用 OnCheckedChangeListener 来侦听更改并选择保存最后一个索引的内容？

example xml:

示例xml：

<RadioGroup android:id="@+id/group1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical">
    <RadioButton android:id="@+id/radio1" android:text="option 1" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    <RadioButton android:id="@+id/radio2" android:text="option 2" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    <RadioButton android:id="@+id/radio3" android:text="option 3" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    <RadioButton android:id="@+id/radio4" android:text="option 4" android:layout_width="wrap_content" android:layout_height="wrap_content" />
    <RadioButton android:id="@+id/radio5" android:text="option 5" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</RadioGroup>

if a user selects option 3I want to get the index, 2.

如果用户选择option 3我想获取索引，2。

采纳答案by BP.

You should be able to do something like this:

你应该能够做这样的事情：

int radioButtonID = radioButtonGroup.getCheckedRadioButtonId();
View radioButton = radioButtonGroup.findViewById(radioButtonID);
int idx = radioButtonGroup.indexOfChild(radioButton);

If the RadioGroupcontains other Views (like a TextView) then the indexOfChild()method will return wrong index.

如果RadioGroup包含其他视图（如 a TextView），则该indexOfChild()方法将返回错误的索引。

To get the selected RadioButtontext on the RadioGroup:

要在 上获取所选RadioButton文本RadioGroup：

 RadioButton r = (RadioButton) radioButtonGroup.getChildAt(idx);
 String selectedtext = r.getText().toString();

回答by ingsaurabh

You can either use OnCheckedChangeListener or can use getCheckedRadioButtonId()

您可以使用 OnCheckedChangeListener 或使用 getCheckedRadioButtonId ()

回答by Stefan Bossbaly

You could have a reference to the radio group and use getCheckedRadioButtonId ()to get the checked radio button id. Take a look here

您可以引用无线电组并用于getCheckedRadioButtonId ()获取选中的单选按钮 ID。看看这里

RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radio_group);

Then when you need to get the selected radio option.

然后当您需要获取选定的无线电选项时。

int checkedRadioButtonId = radioGroup.getCheckedRadioButtonId();
if (checkedRadioButtonId == -1) {
    // No item selected
}
else{
    if (checkedRadioButtonId == R.id.radio_button1) {
        // Do something with the button
    }
}

回答by source.rar

This should work,

这应该有效，

int index = myRadioGroup.indexOfChild(findViewById(myRadioGroup.getCheckedRadioButtonId()));

回答by Marco Fantasia

You can use:

您可以使用：

RadioButton rb = (RadioButton) findViewById(rg.getCheckedRadioButtonId());

回答by Jhoe-mar Pagao

//use to get the id of selected item

//用于获取选中项的id

int selectedID = myRadioGroup.getCheckedRadioButtonId();

//get the view of the selected item

//获取选中项的视图

View selectedView = (View)findViewById( selectedID);

回答by Prashant Maheshwari Andro

 int index_selected = radio_grp.indexOfChild(radio_grp
                .findViewById(radio_grp.getCheckedRadioButtonId()));

回答by Nooh

try this

尝试这个

        RadioGroup  group= (RadioGroup) getView().findViewById(R.id.radioGroup);
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                View radioButton = radioGroup.findViewById(i);
                int index = radioGroup.indexOfChild(radioButton);
            }
        });

回答by Faheem

you can do

你可以做

findViewById

from the radio group .

来自广播组。

Here it is sample :

这是示例：

((RadioButton)my_radio_group.findViewById(R.id.radiobtn_veg)).setChecked(true);

回答by Shinz6

It worked perfectly for me in this way:

它以这种方式对我来说非常有效：

    RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radio_group);
    int radioButtonID = radioGroup.getCheckedRadioButtonId();
    RadioButton radioButton = (RadioButton) radioGroup.findViewById(radioButtonID);
    String selectedtext = (String) radioButton.getText();