title: void is an invalid type for this variable
body: <p>I am getting this error:</p>
  
  <blockquote>
    <p>void is an invalid type for the variable onRadioButtonClicked</p>
  </blockquote>
  
  <p>But the developer site says that void is a must! So where is the problem? The coding of the xml's is correc.. The problem must lie somewhere here:</p>
  
  <pre><code>package com.example.kernel.version;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.support.v4.app.NavUtils;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  import android.widget.Button;
  import android.widget.RadioButton;
  
  public class MainPage extends Activity {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          Intent intent=getIntent();
          setContentView(R.layout.activity_main_page);       
  
          public void onRadioButtonClicked(View view) {
              // Is the button now checked?
              boolean checked = ((RadioButton) view).isChecked();
  
              // Check which radio button was clicked
              switch(view.getId()) {
                  case R.id.radio_pirates:
                      if (checked)
                          // Pirates are the best
                      break;
                  case R.id.radio_ninjas:
                      if (checked)
                          // Ninjas rule
                      break;
              }
  
          }
  </code></pre>