android - 如何检查在android中选中了哪个单选按钮？

Question

大家好，我有 4 个值，即 4 个单选按钮，我想检查它们是否被选中，我该怎么做？我试过了

public void onRadioButtonClicked(View v){
    // Your code on click

    radioTypeGroup = (RadioGroup) findViewById(R.id.radioType);
    radioTypeGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            int selectedId = radioTypeGroup.getCheckedRadioButtonId();

            // find the radiobutton by returned id
            RadioButton r1 = (RadioButton) findViewById(R.id.radio_food);
            RadioButton r2 = (RadioButton) findViewById(R.id.radio_fitness);
            RadioButton r3 = (RadioButton) findViewById(R.id.radio_entertainment);
            RadioButton r4 = (RadioButton) findViewById(R.id.radio_events);

            if (r1.isChecked()) {
                String food = "food";
                type = food;

            }
            if (r2.isChecked()) {
                String fitness = "fitness";
                type = fitness;


            }

但它不起作用，我正在将类型分配给方法之外的另一个字符串

Answer 1

尝试实现以下代码

 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);
            }
        });