Emit appLaunchedEvent and call setRoot

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

 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 
+import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
 import com.facebook.react.shell.MainReactPackage;
 import com.reactnativenavigation.R;
+import com.reactnativenavigation.react.NavigationEventEmitter;
 import com.reactnativenavigation.react.NavigationPackage;
 import com.reactnativenavigation.react.ReactDevPermission;
 
             return;
         }
 
+        host.getReactInstanceManager().addReactInstanceEventListener(new ReactInstanceManager.ReactInstanceEventListener() {
+            @Override
+            public void onReactContextInitialized(ReactContext context) {
+                new NavigationEventEmitter(context).emitAppLaunched();
+            }
+        });
         host.getReactInstanceManager().createReactContextInBackground();
+
+
     }
 
     @Override

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

 
 import android.app.Application;
 
+import com.facebook.react.bridge.ReactContext;
+import com.reactnativenavigation.react.NavigationEventEmitter;
+
 public abstract class NavigationApplication extends Application {
     public static NavigationApplication instance;
+    public NavigationEventEmitter eventEmitter;
 
     @Override
     public void onCreate() {
         super.onCreate();
         instance = this;
+
     }
 
     public abstract boolean isDebug();
+
+    public void onReactContextInitialized(ReactContext context) {
+        eventEmitter = new NavigationEventEmitter(context);
+    }
 }

android/app/src/main/java/com/reactnativenavigation/react/NavigationEventEmitter.java

+package com.reactnativenavigation.react;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.ReactContext;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.modules.core.DeviceEventManagerModule;
+
+public class NavigationEventEmitter {
+
+    private final DeviceEventManagerModule.RCTDeviceEventEmitter emitter;
+
+    public NavigationEventEmitter(ReactContext reactContext) {
+        this.emitter = reactContext.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class);
+    }
+
+    public void emitAppLaunched() {
+        emit("RNN.appLaunched");
+    }
+
+    private void emit(String eventName) {
+        WritableMap data = Arguments.createMap();
+        emitter.emit(eventName, data);
+    }
+}

android/app/src/main/java/com/reactnativenavigation/react/NavigationModule.java

 
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.bridge.ReadableMap;
 
 public class NavigationModule extends ReactContextBaseJavaModule {
-    public static final String NAME = "NavigationModule";
+    public static final String NAME = "RNNBridgeModule";
 
     public NavigationModule(ReactApplicationContext reactContext) {
         super(reactContext);
     public String getName() {
         return NAME;
     }
+
+    @ReactMethod
+    public void setRoot(ReadableMap layoutTree) {
+        
+    }
 }