title: GoogleMap v2 didn't appear on the device
body: <p>I make this example <a href="http://mobisys.in/blog/2012/12/google-rolls-out-android-maps-api-v2/" rel="nofollow">http://mobisys.in/blog/2012/12/google-rolls-out-android-maps-api-v2/</a>, but didn't appear the map in my device</p>
  
  <p>this is my AndroidManifest.xml</p>
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.control_guard"
  android:versionCode="1"
  android:versionName="1.0" &gt;
  
  &lt;uses-sdk
      android:minSdkVersion="15"
      android:targetSdkVersion="15"/&gt;
  &lt;permission
      android:name="com.control_guard.permission.MAPS_RECEIVE"
      android:protectionLevel="signature" /&gt;
  &lt;uses-feature
      android:glEsVersion="0x00020000"
      android:required="true" /&gt;
  &lt;uses-permission android:name="com.control_guard.permission.MAPS_RECEIVE" /&gt;
  &lt;uses-permission android:name="android.permission.INTERNET" &gt;
  &lt;/uses-permission&gt;
  &lt;uses-permission android:name="android.permission.CALL_PHONE" /&gt;
  &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
  &lt;uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
  
  &lt;application
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" &gt;
      &lt;activity
          android:name=".Inicio"
          android:label="@string/title_activity_inicio"
          android:theme="@android:style/Theme.Holo.NoActionBar" 
          android:uiOptions="splitActionBarWhenNarrow"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN" /&gt;
  
              &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
      &lt;activity
          android:name="Login"
          android:theme="@android:style/Theme.Holo.NoActionBar" &gt;
      &lt;/activity&gt;
      &lt;activity android:name="MenuControlGuard" &gt;
      &lt;/activity&gt;
      &lt;activity android:name="MenuPrincipal" &gt;
      &lt;/activity&gt;
      &lt;activity android:name="Asistencia" 
          android:theme="@android:color/holo_blue_dark"&gt;
      &lt;/activity&gt;
      &lt;activity android:name="ListaPersonal"
          android:theme="@android:color/holo_blue_dark" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".DatosPersonal"
          android:label="@string/title_activity_datos_personal" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".ListaClientes"
          android:label="@string/title_activity_lista__clientes" 
          android:theme="@android:color/holo_blue_dark"&gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".DatosCliente"
          android:label="@string/title_activity_datos_cliente" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".MenuReportes"
          android:label="@string/title_activity_menu_reportes" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".NuevoReporte"
          android:label="@string/title_activity_nuevo_reporte" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".Lista_Reportes"
          android:label="@string/title_activity_lista__reportes"
          android:theme="@android:color/holo_blue_dark" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".EditarReporte"
          android:label="@string/title_activity_editar_reporte" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".MenuPrincipalOperaciones"
          android:label="@string/title_activity_menu_principal_operaciones" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".VerReportes"
          android:label="@string/title_activity_ver_reportes" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".ListaSupervisor"
          android:label="@string/title_activity_lista_supervisor"
          android:theme="@android:color/holo_blue_dark" &gt;
      &lt;/activity&gt;
      &lt;activity
          android:name=".Mapa"
          android:label="@string/title_activity_mapa" &gt;
      &lt;/activity&gt;
      &lt;meta-data
          android:name="com.google.android.maps.v2.API_KEY"
          android:value="AIzaSyAUvGf-KcrLy4ptevrE5LRK9XCVuYf7vOE" /&gt;
  &lt;/application&gt;
  </code></pre>
  
  <p>`</p>
  
  <p>My .xml is</p>
  
  <pre><code>   &lt;fragment
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      class="com.google.android.gms.maps.MapFragment" /&gt;`
  </code></pre>
  
  <p>And this is my .java</p>
  
  <pre><code>package com.control_guard;
  
  import android.os.Bundle;
  import android.app.Activity;
  import android.content.Intent;
  import android.support.v4.app.FragmentActivity;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.widget.Toast;
  
  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 Mapa extends Activity  {
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.mapa);
  
      final LatLng HAMBURG = new LatLng(53.558, 9.927);
       final LatLng KIEL = new LatLng(53.551, 9.993);
      final GoogleMap map;
  
        map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
            .getMap();
        Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
            .title("Hamburg"));
        Marker kiel = map.addMarker(new MarkerOptions()
            .position(KIEL)
            .title("Kiel")
            .snippet("Kiel is cool")
            .icon(BitmapDescriptorFactory
                .fromResource(R.drawable.ic_launcher)));
  
        // Move the camera instantly to hamburg with a zoom of 15.
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
  
        // Zoom in, animating the camera.
        map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.mapa, menu);
      return true;
  }`
  </code></pre>
  
  <p>Please i need help with this problem, i dont found the error in my code.</p>