fix packager init

lib/android/app/src/main/java/com/reactnativenavigation/NavigationActivity.java

 import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
 import android.view.KeyEvent;
+import android.widget.Toast;
 
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
 import com.reactnativenavigation.viewcontrollers.Navigator;
 	public Navigator getNavigator() {
 		return navigator;
 	}
+
+	public void toast(final String text) {
+		Toast.makeText(this, text, Toast.LENGTH_LONG).show();
+	}
 }

lib/android/app/src/main/java/com/reactnativenavigation/NavigationApplication.java

 package com.reactnativenavigation;
 
 import android.app.Application;
-import android.content.Context;
 
 import com.facebook.react.ReactApplication;
 import com.facebook.react.ReactNativeHost;
 
 public abstract class NavigationApplication extends Application implements ReactApplication {
 
-	public static Context context;
 	private ReactGateway reactGateway;
 
 	@Override
 	public void onCreate() {
 		super.onCreate();
-		context = this;
 		reactGateway = new ReactGateway(this, isDebug());
 	}
 

lib/android/app/src/main/java/com/reactnativenavigation/react/NavigationReactInitializer.java

 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.devsupport.interfaces.PackagerStatusCallback;
 import com.reactnativenavigation.NavigationActivity;
-import com.reactnativenavigation.utils.Toaster;
 import com.reactnativenavigation.utils.UiThread;
 
 public class NavigationReactInitializer implements ReactInstanceManager.ReactInstanceEventListener {
 	private final DevPermissionRequest devPermissionRequest;
 	private final boolean isDebug;
 	private boolean waitingForAppLaunchEvent = true;
-	private boolean isPackagerRunning = false;
 
 	public NavigationReactInitializer(ReactInstanceManager reactInstanceManager, boolean isDebug) {
 		this.reactInstanceManager = reactInstanceManager;
 			devPermissionRequest.askPermission(activity);
 		} else {
 			reactInstanceManager.onHostResume(activity, activity);
-			prepareReactApp();
+			checkBundleThenPrepareReact(activity);
 		}
 	}
 
 		}
 	}
 
-	private void prepareReactApp() {
-		if (isDebug && !isPackagerRunning) {
+	private void checkBundleThenPrepareReact(final NavigationActivity activity) {
+		if (isDebug) {
 			reactInstanceManager.getDevSupportManager().isPackagerRunning(new PackagerStatusCallback() {
 				@Override
 				public void onPackagerStatusFetched(final boolean packagerIsRunning) {
 					UiThread.post(new Runnable() {
 						@Override
 						public void run() {
-							isPackagerRunning = packagerIsRunning;
-							if (!isPackagerRunning) {
-								Toaster.toast("Packager is not running!");
+							if (!packagerIsRunning) {
+								activity.toast("Packager is not running!");
+								activity.finish();
 							} else {
-								prepareReactApp();
+								prepareReactAppWithWorkingBundle();
 							}
 						}
 					});
 				}
 			});
-			return;
+		} else {
+			prepareReactAppWithWorkingBundle();
 		}
+	}
+
+	private void prepareReactAppWithWorkingBundle() {
 		reactInstanceManager.addReactInstanceEventListener(this);
 		if (shouldCreateContext()) {
 			reactInstanceManager.createReactContextInBackground();

lib/android/app/src/main/java/com/reactnativenavigation/utils/Toaster.java

-package com.reactnativenavigation.utils;
-
-import android.widget.Toast;
-
-import com.reactnativenavigation.NavigationApplication;
-
-public class Toaster {
-	public static void toast(String text) {
-		Toast.makeText(NavigationApplication.context, text, Toast.LENGTH_LONG).show();
-	}
-}