Android Back Button support

Author: bleonard

App/Navigation/NavigationBar.js

@@ -8,6 +8,7 @@ import {
 
 import cssVar from '../Lib/cssVar';
 
+import Back                         from '../Platform/Back';
 import NavigatorNavigationBarStyles from '../Platform/NavigatorNavigationBarStyles';
 import NavigationBarRouteMapper     from '../Navigation/NavigationBarRouteMapper';
 
@@ -128,6 +129,10 @@ var NavigationBar = {
     );
   },
 
+  componentDidMount: function() {
+    Back.setNavigator(this.refs.navigator);
+  },
+
   render: function() {
     return (
       <View style={styles.appContainer}>

App/Platform/Back.android.js

@@ -0,0 +1,26 @@
+import React from 'react';
+
+import {
+  BackAndroid,
+} from 'react-native';
+
+import AppActions    from '../Actions/AppActions';
+// import DrawerStore   from '../Stores/DrawerStore';
+
+const Back = {
+  setNavigator(navigator) {
+    BackAndroid.addEventListener('hardwareBackPress', () => {
+      // if (DrawerStore.get().open === true) {
+      //   AppActions.toggleDrawer();
+      //   return true;
+      // }
+      if (navigator && navigator.getCurrentRoutes().length > 1) {
+        AppActions.goBack(navigator);
+        return true;
+      }
+      return false;
+    });
+  },
+};
+
+export default Back;

Back.ios.js

@@ -0,0 +1,6 @@
+const Back = {
+  setNavigator(navigator) {
+  },
+};
+
+export default Back;