Add support in switchToTab() with no parameters

android/app/src/main/java/com/reactnativenavigation/activities/BaseReactActivity.java

@@ -59,6 +59,8 @@ public abstract class BaseReactActivity extends AppCompatActivity implements Def
     protected static final String KEY_TAB_INDEX = "tabIndex";
     protected static final String KEY_TITLE = "title";
     protected static final String KEY_TO = "to";
+    protected static final String KEY_NAVIGATOR_ID = "navigatorID";
+
     private static final String TAG = "BaseReactActivity";
     private static final String REDBOX_PERMISSION_MESSAGE =
             "Overlay permissions needs to be granted in order for react native apps to run in dev mode";

android/app/src/main/java/com/reactnativenavigation/activities/BottomTabActivity.java

@@ -212,7 +212,13 @@ public class BottomTabActivity extends BaseReactActivity implements AHBottomNavi
     }
 
     public void switchToTab(ReadableMap params) {
-        int tabIndex = params.getInt(KEY_TAB_INDEX);
+        Integer tabIndex;
+        if (params.hasKey(KEY_TAB_INDEX)) {
+            tabIndex = params.getInt(KEY_TAB_INDEX);
+        } else {
+            final String navigatorId = params.getString(KEY_NAVIGATOR_ID);
+            tabIndex = findNavigatorTabIndex(navigatorId);
+        }
         mBottomNavigation.setCurrentItem(tabIndex);
     }
 
@@ -255,6 +261,17 @@ public class BottomTabActivity extends BaseReactActivity implements AHBottomNavi
         }
     }
 
+    protected Integer findNavigatorTabIndex(String navigatorId) {
+        for (int i = 0; i < mScreenStacks.size(); i++) {
+            ScreenStack stack = mScreenStacks.get(i);
+            if (!stack.isEmpty() && stack.peek().navigatorId.equals(navigatorId)) {
+                return i;
+            }
+        }
+
+        return null;
+    }
+
     private void setTabsWithIcons(ArrayList<Screen> screens, Map<Screen, Drawable> icons) {
         mScreenStacks = new ArrayList<>();
         for (Screen screen : screens) {
@@ -268,6 +285,7 @@ public class BottomTabActivity extends BaseReactActivity implements AHBottomNavi
         this.onTabSelected(0, false);
     }
 
+
     @Override
     protected void removeAllReactViews() {
         for (ScreenStack screenStack : mScreenStacks) {

src/platformSpecific.android.js

@@ -99,6 +99,7 @@ function navigatorSetTitle(navigator, params) {
 
 function navigatorSwitchToTab(navigator, params) {
   RctActivity.switchToTab({
+    navigatorID: navigator.navigatorID,
     tabIndex: params.tabIndex
   });
 }