title: ParsePlugins is already initialized error
body: <p>I am using parse for push notification i am getting following error</p>
  
  <pre><code>    Caused by: java.lang.IllegalStateException: ParsePlugins is already initialized 
      at com.parse.ParsePlugins.set(ParsePlugins.java:39) 
      at com.parse.ParsePlugins$Android.initialize(ParsePlugins.java:153) 
      at com.parse.Parse.initialize(Parse.java:358) 
      at com.parse.Parse.initialize(Parse.java:344) 
      at notifications.ParseUtils.registerParse(ParseUtils.java:30) 
      at com.techieweb.solutions.pickeronline.SplashActivity.onCreate(SplashActivity.java:24) 
      at android.app.Activity.performCreate(Activity.java:5326) 
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097) 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2218) 
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2309) 
      at android.app.ActivityTh read.access$700(ActivityThread.java:157) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1289) 
          at android.os.Handler.dispatchMessage(Handler.java:99) 
          at android.os.Looper.loop(Looper.java:176) 
          at android.app.ActivityThread.main(ActivityThread.java:5317) 
          at java.lang.reflect.Method.invokeNative(Native Method) 
          at java.lang.reflect.Method.invoke(Method.java:511) 
          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 
          at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>This is ParseUtils class</p>
  
  <pre><code> public class ParseUtils {
  
  private static String TAG = ParseUtils.class.getSimpleName();
  
  public static void verifyParseConfiguration(Context context) {
      if (TextUtils.isEmpty(AppConfig.PARSE_APPLICATION_ID) || TextUtils.isEmpty(AppConfig.PARSE_CLIENT_KEY)) {
          Toast.makeText(context, "Please configure your Parse Application ID and Client Key in AppConfig.java", Toast.LENGTH_LONG).show();
          ((Activity) context).finish();
      }
  }
  
  public static void registerParse(Context context) {
      // initializing parse library
      Parse.initialize(context, AppConfig.PARSE_APPLICATION_ID, AppConfig.PARSE_CLIENT_KEY);
      ParseInstallation.getCurrentInstallation().saveInBackground();
  
      ParsePush.subscribeInBackground(AppConfig.PARSE_CHANNEL, new SaveCallback() {
          @Override
          public void done(ParseException e) {
              Log.e(TAG, "Successfully subscribed to Parse!");
          }
      });
  }
  
  public static void subscribeWithEmail(String email) {
      ParseInstallation installation = ParseInstallation.getCurrentInstallation();
  
      installation.put("email", email);
  
      installation.saveInBackground();
  
      Log.e(TAG, "Subscribed with email: " + email);
  }
   }
  </code></pre>
  
  <p>I have used this for reference <a href="http://www.androidhive.info/2015/06/android-push-notifications-using-parse-com/" rel="nofollow">http://www.androidhive.info/2015/06/android-push-notifications-using-parse-com/</a></p>
  
  <p>This is MyApplication</p>
  
  <pre><code> public class MyApplication extends Application {
  
  private static MyApplication mInstance;
  
  @Override
  public void onCreate() {
      super.onCreate();
      mInstance = this;
  
      Parse.initialize(mInstance, AppConfig.PARSE_APPLICATION_ID, AppConfig.PARSE_CLIENT_KEY);
       //register with parse
      ParseUtils.registerParse(this);
  
  }
  
  
  public static synchronized MyApplication getInstance() {
      return mInstance;
  }
   }
  </code></pre>
  
  <p>Please help.</p>