如何檢查在android中選中哪個單選按鈕？

Question

嗨，大家好，我有一個4值，即4個單選按鈕，我想檢查他們是否被檢查或不會如何做？我曾經嘗試這樣做

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; 


      } 

但其沒有工作，我分配到另一種字符串的方法

Answer 1

外嘗試執行以下代碼

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); 
      } 
     });