title: Blank activity in Google Maps
body: <p>I am trying to create a basic google map activity, but when i try to run it to my smartphone, I get a blank activity (click <a href="http://postimg.org/image/6hr5qlwhf" rel="nofollow noreferrer">here</a> to see a screenshot of the issue). What im doing wrong? It is something wrong with my API Key, maybe?</p>
  
  <p><strong>AndroidManifest.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.fa2015.mapstest"&gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:supportsRtl="true"
          android:theme="@style/AppTheme"&gt;
          &lt;meta-data
              android:name="com.google.android.gms.version"
              android:value="@integer/google_play_services_version"/&gt;
  
          &lt;meta-data
              android:name="com.google.android.maps.v2.API_KEY"
              android:value="_MyKey_"/&gt;
  
          &lt;activity
              android:name=".MainActivity"
              android:label="@string/app_name"
              android:theme="@style/AppTheme.NoActionBar"&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;/application&gt;
      &lt;uses-permission android:name="android.permission.INTERNET"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"&gt;&lt;/uses-permission&gt;
  &lt;/manifest&gt;
  </code></pre>
  
  <p><strong>activity_main.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  
  &lt;fragment xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:name="com.google.android.gms.maps.SupportMapFragment" /&gt;
  </code></pre>
  
  <p><strong>MainActivity.java</strong></p>
  
  <pre><code>import com.google.android.gms.maps.GoogleMap; 
  import com.google.android.gms.maps.OnMapReadyCallback; 
  import com.google.android.gms.maps.SupportMapFragment; 
  import com.google.android.gms.maps.model.LatLng; 
  import com.google.android.gms.maps.model.MarkerOptions; 
  import android.os.Bundle; 
  import android.support.v7.app.AppCompatActivity;
  
      public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {
  
          @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.activity_main);
  
              SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
              mapFragment.getMapAsync(this);
          }
  
          @Override
          public void onMapReady(GoogleMap map) {
              map.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
          } }
  </code></pre>
  
  <p>Thanks in advance.</p>