title: java.lang.RuntimeException: Unable to instantiate service .GCMIntentService
body: <p>I'm trying to learn how to set a client receiver using the google cloud messaging system and i'm following this Google's tutorial: <a href="http://developer.android.com/guide/google/gcm/gs.html#android-app">http://developer.android.com/guide/google/gcm/gs.html#android-app</a></p>
  
  <p>I have done everything that the tutorial asks but when I run my application it works for a moment and then it crashes and this is the LogCat:</p>
  
  <pre><code>08-07 17:04:40.726: E/AndroidRuntime(8155): FATAL EXCEPTION: main
  08-07 17:04:40.726: E/AndroidRuntime(8155): java.lang.RuntimeException: Unable to instantiate service com.example.google.cloud.messaging.GCMIntentService: java.lang.ClassNotFoundException: com.example.google.cloud.messaging.GCMIntentService in loader dalvik.system.PathClassLoader[/data/app/com.example.google.cloud.messaging-1.apk]
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:1933)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.app.ActivityThread.access$2500(ActivityThread.java:117)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:989)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.os.Handler.dispatchMessage(Handler.java:99)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.os.Looper.loop(Looper.java:130)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.app.ActivityThread.main(ActivityThread.java:3687)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at java.lang.reflect.Method.invokeNative(Native Method)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at java.lang.reflect.Method.invoke(Method.java:507)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at dalvik.system.NativeStart.main(Native Method)
  08-07 17:04:40.726: E/AndroidRuntime(8155): Caused by: java.lang.ClassNotFoundException: com.example.google.cloud.messaging.GCMIntentService in loader dalvik.system.PathClassLoader[/data/app/com.example.google.cloud.messaging-1.apk]
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
  08-07 17:04:40.726: E/AndroidRuntime(8155):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:1930)
  </code></pre>
  
  <p><strong>This is my code</strong> </p>
  
  <pre><code>public class MainActivity extends Activity {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          GCMRegistrar.checkDevice(this);
          GCMRegistrar.checkManifest(this);
          final String regId = GCMRegistrar.getRegistrationId(this);
          if (regId.equals("")) {
            GCMRegistrar.register(this, "962129210868");
            Log.i("Registrando","");
          } else {
            Log.i("Test", "Already registered");
          }
      }
  }
  </code></pre>
  
  <p><strong>And this is my Manifest</strong></p>
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example.google.cloud.messaging"
      android:versionCode="1"
      android:versionName="1.0" &gt;
  
      &lt;uses-sdk
          android:minSdkVersion="8"
          android:targetSdkVersion="16" /&gt;
  
      &lt;uses-permission android:name="android.permission.INTERNET" /&gt;
      &lt;uses-permission android:name="android.permission.GET_ACCOUNTS" /&gt;
      &lt;uses-permission android:name="android.permission.WAKE_LOCK" /&gt;
  
      &lt;permission
          android:name="com.example.google.cloud.messaging.permission.C2D_MESSAGE"
          android:protectionLevel="signature" /&gt;
  
      &lt;uses-permission android:name="com.example.google.cloud.messaging.permission.C2D_MESSAGE" /&gt;
      &lt;uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /&gt;
  
      &lt;application
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme" &gt;
  
          &lt;activity
              android:name=".MainActivity"
              android:label="@string/title_activity_main" &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;receiver
              android:name="com.google.android.gcm.GCMBroadcastReceiver"
              android:permission="com.google.android.c2dm.permission.SEND" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="com.google.android.c2dm.intent.RECEIVE" /&gt;
                  &lt;action android:name="com.google.android.c2dm.intent.REGISTRATION" /&gt;
  
                  &lt;category android:name="com.example.google.cloud.messaging" /&gt;
              &lt;/intent-filter&gt;
          &lt;/receiver&gt;
  
          &lt;service android:name="com.example.google.cloud.messaging.GCMIntentService"  android:enabled="true"/&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>
  
  <h1>FIXED</h1>
  
  <p>I have create a new class called GCMIntentService:</p>
  
  <pre><code>public class GCMIntentService extends GCMBaseIntentService {
  
      @SuppressWarnings("hiding")
      private static final String TAG = "GCMIntentService";
  
      public GCMIntentService() {
          super("Test");
      }
  
      @Override
      protected void onRegistered(Context context, String registrationId) {
          Log.i(TAG, "Device registered: regId = " + registrationId);
      }
  
      @Override
      protected void onUnregistered(Context context, String registrationId) {
          Log.i(TAG, "Device unregistered");
      }
  
      @Override
      protected void onMessage(Context arg0, Intent arg1) {
        Log.d("GCM", "RECIEVED A MESSAGE");
        generateNotification(arg0, arg1.getStringExtra("message"));
         }
  
      @Override
      protected void onDeletedMessages(Context context, int total) {
          Log.i(TAG, "Received deleted messages notification");
      }
  
      @Override
      public void onError(Context context, String errorId) {
          Log.i(TAG, "Received error: " + errorId);
      }
  
      @Override
      protected boolean onRecoverableError(Context context, String errorId) {
          // log message
          Log.i(TAG, "Received recoverable error: " + errorId);
          return super.onRecoverableError(context, errorId);
      }
  
      /**
       * Issues a notification to inform the user that server has sent a message.
       */
      private static void generateNotification(Context context, String message) {
          int icon = R.drawable.ic_action_search;
          long when = System.currentTimeMillis();
          NotificationManager notificationManager = (NotificationManager)
                  context.getSystemService(Context.NOTIFICATION_SERVICE);
          Notification notification = new Notification(icon, message, when);
          String title = context.getString(R.string.app_name);
          Intent notificationIntent = new Intent(context, GCMIntentService.class);
          // set intent so it does not start a new activity
          notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
                  Intent.FLAG_ACTIVITY_SINGLE_TOP);
          PendingIntent intent =
                  PendingIntent.getActivity(context, 0, notificationIntent, 0);
          notification.setLatestEventInfo(context, title, message, intent);
          notification.flags |= Notification.FLAG_AUTO_CANCEL;
          notificationManager.notify(0, notification);
      }
  
  }
  </code></pre>