title: import cannot be resolved
body: <p>I have an activity class with several imports but some of them are not recognized in Eclipse. I see the error import class name cannot be resolved.</p>
  
  <p>That is my code:</p>
  
  <pre><code>package com.ap.mapa;
  
  import android.os.Bundle;
  import android.app.Activity;
  import android.view.Menu;
  import com.google.android.gms.maps.CameraUpdateFactory;
  import com.google.android.gms.maps.GoogleMap;
  import com.google.android.gms.maps.MapFragment;
  import com.google.android.gms.maps.model.BitmapDescriptorFactory;
  import com.google.android.gms.maps.model.LatLng;
  import com.google.android.gms.maps.model.Marker;
  import com.google.android.gms.maps.model.MarkerOptions;
  
  
  public class MapaLugaresActivity extends Activity {
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_mapa_lugares);
  
  
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.mapa_lugares, menu);
      return true;
  }
  
  }
  </code></pre>
  
  <p>The errors are in every import com.google.android.gms.maps. If I type another class as import android.content.Context; there are no errors.</p>
  
  <p>How can I fix them?</p>
  
  <p>Thanks.</p>