popToRoot

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

         super.onCreate();
         instance = this;
         handler = new Handler(getMainLooper());
-        navigationReactInstance = new NavigationReactInstance();
-        navigationReactInstance.startReactContextOnceInBackgroundAndExecuteJS();
     }
 
     public void runOnMainThread(Runnable runnable) {
     public void sendEvent(String eventId, String navigatorEventId) {
         navigationReactInstance.getReactEventEmitter().sendEvent(eventId, navigatorEventId);
     }
+
+    public void startReactContext() {
+        navigationReactInstance = new NavigationReactInstance();
+        navigationReactInstance.startReactContextOnceInBackgroundAndExecuteJS();
+    }
 }

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

 
     @ReactMethod
     public void popToRoot(final ReadableMap params) {
+        NavigationCommandsHandler.popToRoot(BundleConverter.toBundle(params));
     }
 
     @ReactMethod

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

     void pop(ScreenParams params) {
         layout.pop(params);
     }
+
+    void popToRoot(ScreenParams params) {
+        layout.popToRoot(params);
+    }
 }

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

             }
         });
     }
+
+    public static void popToRoot(Bundle screenParams) {
+        final NavigationActivity currentActivity = NavigationActivity.currentActivity;
+        if (currentActivity == null) {
+            return;
+        }
+
+        final ScreenParams params = ScreenParamsParser.parse(screenParams);
+        NavigationApplication.instance.runOnMainThread(new Runnable() {
+            @Override
+            public void run() {
+                currentActivity.popToRoot(params);
+            }
+        });
+    }
 }

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

 package com.reactnativenavigation.controllers;
 
+import android.graphics.Color;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
+import android.view.View;
 import android.widget.Toast;
 
 import com.reactnativenavigation.NavigationApplication;
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        NavigationApplication.instance.startReactContext();
         //TODO show fancy splash
+        View view = new View(this);
+        view.setBackgroundColor(Color.RED);
+        setContentView(view);
         Toast.makeText(this, "Loading navigation...", Toast.LENGTH_LONG).show();
     }
 }

android/app/src/main/java/com/reactnativenavigation/layouts/Layout.java

     void push(ScreenParams params);
 
     void pop(ScreenParams params);
+
+    void popToRoot(ScreenParams params);
 }

android/app/src/main/java/com/reactnativenavigation/layouts/ScreenStack.java

     }
 
     public void popToRoot() {
-        while (getStackSize() > 1) {
+        while (canPop()) {
             pop();
         }
     }
         return stack.peek();
     }
 
+    public boolean canPop() {
+        return getStackSize() > 1;
+    }
+
 
 //    /**
 //     * Remove the ScreenStack from {@code parent} while preventing all child react views from getting unmounted

android/app/src/main/java/com/reactnativenavigation/layouts/SingleScreenLayout.java

 
     @Override
     public boolean onBackPressed() {
-        if (stack.isEmpty()) {
-            return false;
-        } else {
+        if (stack.canPop()) {
             stack.pop();
             return true;
+        } else {
+            return false;
         }
     }
 
     public void pop(ScreenParams params) {
         stack.pop();
     }
+
+    @Override
+    public void popToRoot(ScreenParams params) {
+        stack.popToRoot();
+    }
 }

src/deprecated/platformSpecificDeprecated.android.js

   newPlatformSpecific.pop(adapted);
 }
 
+function navigatorPopToRoot(navigator, params) {
+  addNavigatorParams(params, navigator);
+
+  params.screenId = params.screen;
+  let adapted = adaptNavigationStyleToScreenStyle(params);
+  adapted = adaptNavigationParams(adapted);
+
+  newPlatformSpecific.popToRoot(adapted);
+}
+
 function adaptNavigationStyleToScreenStyle(screen) {
   const navigatorStyle = screen.navigatorStyle;
   if (!navigatorStyle) {
   //RctActivity.setNavigatorButtons(params);
 }
 
-function navigatorPopToRoot(navigator, params) {
-  //RctActivity.navigatorPopToRoot({
-  //  navigatorID: navigator.navigatorID,
-  //  animated: !(params.animated === false)
-  //});
-}
-
 function navigatorResetTo(navigator, params) {
   //addNavigatorParams(params, navigator);
   //addNavigatorButtons(params);

src/platformSpecific.android.js

   NativeModules.NavigationReactModule.pop(screenParams);
 }
 
+function popToRoot(screenParams) {
+  NativeModules.NavigationReactModule.pop(screenParams);
+}
+
 module.exports = {
   startApp,
   push,
-  pop
+  pop,
+  popToRoot
 };