如何从组中选中的单选按钮获取文本[重复]

Question

我正在尝试从组中选定的单选按钮中获取文本。我已经搜索过同样的问题，但我得到的解决方案仍然让我遇到同样的错误。

2021-08-07 11:14:14.464 7297-7297/com.findplaceslaxco.ecommerce W/System.err:     at com.findplaceslaxco.ecommerce.Adapters.SecondCartAdapter$ViewHolder$2$1.onCheckedChanged(SecondCartAdapter.java:276)

这是代码：

mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        if (checkedId != -1){
            MaterialRadioButton radioButton = (MaterialRadioButton) group.findViewById(checkedId);
            boolean isChecked = radioButton.isChecked();//this is where the error appears
        }

        }
    }
});

Answer 1

通过 id 查找 RadioButton 并获取文本

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
       @Override
       public void onCheckedChanged(RadioGroup group, int checkedId)
       {
           radioButton = (RadioButton) findViewById(checkedId);
           Toast.makeText(getBaseContext(), radioButton.getText(), Toast.LENGTH_SHORT).show();
       }
   }
   );