title: Android RadioGroup listener on start activity
body: <p>What code do I need to write to have my listener call out the checked Radio Button? Here's my code:</p>
  
  <pre><code>public class TabFragment1 extends Fragment {
  
      RadioGroup radioGroup;
      RadioButton radioButtonJa, radioButtonNee;
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  
          radioGroup = (RadioGroup)v.findViewById(R.id.radioGroup);
          radioButtonJa = (RadioButton)v.findViewById(R.id.radio_hoogteverschillen_ja);
          radioButtonJa.setChecked(true);
          radioButtonNee = (RadioButton)v.findViewById(R.id.radio_hoogteverschillen_nee);
  
          radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
          {
              public void onCheckedChanged(RadioGroup radioGroup, int checkedId)
              {
                  boolean isChecked1 = radioButtonJa.isChecked();
                  boolean isChecked2 = radioButtonNee.isChecked();
                  if (isChecked1){
                      radioButtonJa.setChecked(true);
                      Toast.makeText(getActivity().getBaseContext(), "Ja", Toast.LENGTH_SHORT).show();
                  }
                  else if (isChecked2){
                      radioButtonNee.setChecked(true);
                      Toast.makeText(getActivity().getBaseContext(), "Nee", Toast.LENGTH_SHORT).show();
                  }
                  else{
                      Toast.makeText(getActivity().getBaseContext(), "Geen", Toast.LENGTH_SHORT).show();
                  }
              }
          });
      }
  }
  </code></pre>
  
  <p>When starting my app, it should create a toast but it doesn't. It only creates one when I first click on the other Radio Button. This was also the case with android:checked(true) in the layout file (instead of radioButtonJa.setChecked(true);). How can I get the toast to appear when I open my application?</p>