如何在Android中获取RadioGroup的选定索引

Question

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来监听更改并选择保留最后一个索引的内容？

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>

如果用户选择option 3我想获得索引,2.

Answer 1

你应该可以做这样的事情:

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

如果RadioGroup包含其他视图(如a TextView)那么该indexOfChild()方法将返回错误的索引.

要获取所选RadioButton文本RadioGroup:

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

Answer 2

这应该工作,

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

Answer 3

您可以引用无线电组并使用getCheckedRadioButtonId ()获取已检查的单选按钮ID.看看这里

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

然后,当您需要获取所选的无线电选项.

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

Answer 4

试试这个

        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);
            }
        });

Answer 5

您可以使用OnCheckedChangeListener或使用getCheckedRadioButtonId ()

Answer 6

您可以使用:

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

Answer 7

//用于获取所选项目的ID

int selectedID = myRadioGroup.getCheckedRadioButtonId();

//获取所选项目的视图

View selectedView = (View)findViewById( selectedID);

Answer 8

它以这种方式对我很有效:

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

Answer 9

您所需要的只是首先将值设置为您的RadioButton,例如:

RadioButton radioButton = (RadioButton)findViewById(R.id.radioButton);      
radioButton.setId(1);        //some int value

然后每当选择这个空间radioButton时,你可以通过你给它的Id来拉取它的值

RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radioGroup);                     
int whichIndex = radioGroup.getCheckedRadioButtonId(); //of course the radioButton
                                                       //should be inside the "radioGroup"
                                                       //in the XML

干杯!

Answer 10

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

  btnDisplay=(Button)findViewById(R.id.button);

  btnDisplay.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
        int selectedId=radioSexGroup.getCheckedRadioButtonId();
        radioSexButton=(RadioButton)findViewById(selectedId);
        Toast.makeText(MainActivity.this,radioSexButton.getText(),Toast.LENGTH_SHORT).show();
     }
  });

Answer 11

科特林：

val selectedIndex = radioButtonGroup?.indexOfChild(
  radioButtonGroup?.findViewById(
    radioButtonGroup.getCheckedRadioButtonId())
)