title: Failed to find provider info for com.google.android.gsf.gservices
body: <p>I don't know why Wen run the android app i'm developing, when i want to show maps i obtain an acivity blank with only zoom buttons and the log is:</p>
  
  <pre><code> Failed to find provider info for com.google.android.gsf.gservices
  </code></pre>
  
  <p>This is the activity that show the map</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"
   class="com.google.android.gms.maps.SupportMapFragment"/&gt;
  </code></pre>
  
  <p>This is the file manifest:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="md.clt.android"
  android:versionCode="1"
  android:versionName="1.0" &gt;
  
  &lt;permission
      android:name="md.client.android.permission.MAPS_RECEIVE"
      android:protectionLevel="signature" /&gt;
  
  &lt;uses-permission android:name="md.client.android.permission.MAPS_RECEIVE" /&gt;
  
  &lt;uses-sdk
      android:minSdkVersion="9"
      android:targetSdkVersion="16" /&gt;
  
  &lt;uses-permission android:name="android.permission.INTERNET" /&gt;
  &lt;!--  Allows the API to access Google web-based services --&gt;
  &lt;uses-permission      android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /&gt;
  &lt;!-- Allows the API to cache map tile data in the device's external storage area --&gt;
  &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" /&gt;
  
  &lt;!-- Google Maps Android API requires OpenGL ES version 2 --&gt;
  &lt;uses-feature
      android:glEsVersion="0x00020000"
      android:required="true" /&gt;
  
  &lt;application
      android:allowBackup="true"
      android:icon="@drawable/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme" &gt;
      &lt;meta-data
          android:name="com.google.android.maps.v2.API_KEY"
          android:value="My_apy_key" /&gt;
  
      &lt;activity
          android:name="md.clt.android.MainActivity"
          android:label="@string/app_name" &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="md.clt.android.PoiMap"
          android:label="@string/title_activity_poi_map" &gt;
      &lt;/activity&gt;
  
      &lt;activity
          android:name="md.clt.android.PoiListActivity"
          android:label="@string/title_activity_poi_list" &gt;
      &lt;/activity&gt;
  &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <p>What it means?</p>