Search between a Gas Station

Cannot resolve this symbol for an Object On creating an object RadioGroup in OnCreate() , when later this object is called in another function it shows the error "cannot resolve this symbol" Here is java code MainActivity.java MainActivity.java @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); RadioGroup group1 = (RadioGroup)findViewById(R.id.que1_rG); RadioGroup group2 = (RadioGroup)findViewById(R.id.que2rG); RadioGroup group3 = (RadioGroup)findViewById(R.id.que3rG); RadioGroup group4 = (RadioGroup)findViewById(R.id.que4rG); RadioGroup group5 = (RadioGroup)findViewById(R.id.que5rG); RadioGroup group6 = (RadioGroup)findViewById(R.id.que6rG); RadioGroup group7 = (RadioGroup)findViewById(R.id.que7rG); RadioGroup group8 = (RadioGroup)findViewById(R.id.que8rG); RadioGroup group9 = (RadioGroup)findView...