title: I am getting an error "The method show(FragmentManager, String)"
body: <p>I am getting an error </p>
  
  <blockquote>
    <p>The method <code>show(FragmentManager, String)</code> in the type <code>DialogFragment</code> is not applicable for the arguments <code>(FragmentManager, String)</code></p>
  </blockquote>
  
  <pre><code>package com.example.test1;
  
  import android.os.Bundle;
  import android.app.Activity;
  import android.view.Menu;
  import android.view.View;
  import android.support.v4.app.DialogFragment;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.app.FragmentActivity;
  
  public class MainActivity extends Activity {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
      }
  
      public void click(View view) {
          DialogFragment newFragment = new FireMissilesDialogFragment();
          newFragment.show(getFragmentManager(), "missiles");
      }
  
      public boolean onCreateOtionsMenu(Menu menu) {
          getMenuInflater().inflate(R.menu.activity_main, menu);
          return true;
      }
  }
  </code></pre>