Snackback can be displayed statically from Navigation (#859)

When snackbar cta is clicked - event is dispatched with the specified eventId

android/app/src/main/java/com/reactnativenavigation/bridge/EventEmitter.java

 package com.reactnativenavigation.bridge;
 
+import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.WritableMap;
 import com.reactnativenavigation.NavigationApplication;
 import com.reactnativenavigation.react.ReactGateway;
         }
         reactGateway.getReactEventEmitter().sendEvent(eventId, arguments);
     }
+
+    public void sendEvent(String eventId) {
+        if (!NavigationApplication.instance.isReactContextInitialized()) {
+            return;
+        }
+        reactGateway.getReactEventEmitter().sendEvent(eventId, Arguments.createMap());
+    }
 }

android/app/src/main/java/com/reactnativenavigation/views/Snakbar.java

             snackbar.setAction(params.buttonText, new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
+                    NavigationApplication.instance.getEventEmitter().sendEvent(params.eventId);
                     NavigationApplication.instance.getEventEmitter().sendNavigatorEvent(params.eventId, navigatorEventId);
                 }
             });

src/Navigation.js

   return platformSpecific.dismissAllModals(params);
 }
 
+function showSnackbar(params = {}) {
+  return platformSpecific.showSnackbar(params);
+}
+
 function showLightBox(params = {}) {
   return platformSpecific.showLightBox(params);
 }
   showModal: showModal,
   dismissModal: dismissModal,
   dismissAllModals: dismissAllModals,
+  showSnackbar: showSnackbar,
   showLightBox: showLightBox,
   dismissLightBox: dismissLightBox,
   showInAppNotification: showInAppNotification,

src/deprecated/platformSpecificDeprecated.android.js

   screen.navigatorStyle = Object.assign({}, Screen.navigatorStyle, screen.navigatorStyle);
 }
 
-function showSnackbar(navigator, params) {
+function showSnackbar(params) {
   const adapted = _.cloneDeep(params);
   if (adapted.backgroundColor) {
     adapted.backgroundColor = processColor(adapted.backgroundColor);