Merge pull request #2389 from ecency/sa/back-nav-bug

Bug Fix: back button exiting/minimizing app

src/navigation/service.js

@@ -1,3 +1,4 @@
+import { BackHandler } from 'react-native';
 import { NavigationActions } from 'react-navigation';
 
 let _navigator;
@@ -24,6 +25,17 @@ const navigate = (navigationProps) => {
   }
 };
 
+const navigateBack = () => {
+  if (_navigator) {
+    const { index } = _navigator.state.nav.routes[0];
+    if (index) {
+      _navigator.dispatch(NavigationActions.back());
+    } else {
+      BackHandler.exitApp();
+    }
+  }
+};
+
 // add other navigation functions that you need and export them
 
-export { navigate, setTopLevelNavigator };
+export { navigate, setTopLevelNavigator, navigateBack };

src/screens/application/container/applicationContainer.tsx

@@ -49,7 +49,7 @@ import {
   getUnreadNotificationCount,
 } from '../../../providers/ecency/ecency';
 import { fetchLatestAppVersion } from '../../../providers/github/github';
-import { navigate } from '../../../navigation/service';
+import { navigate, navigateBack } from '../../../navigation/service';
 
 // Actions
 import {
@@ -566,14 +566,15 @@ class ApplicationContainer extends Component {
   };
 
   _onBackPress = () => {
+    navigateBack();
+    /* 
     const { dispatch, nav } = this.props;
-
     if (nav && nav[0].index !== 0) {
       dispatch(NavigationActions.back());
     } else {
       BackHandler.exitApp();
     }
-
+    */
     return true;
   };
 

src/screens/transfer/screen/transferScreen.js

@@ -127,7 +127,7 @@ const TransferView = ({
 
       <KeyboardAwareScrollView
         keyboardShouldPersistTaps
-        contentContainerStyle={[styles.grow, { padding: 16 }]}
+        contentContainerStyle={[styles.grow, styles.keyboardAwareScrollContainer]}
       >
         <View style={styles.container}>
           <TransferAccountSelector

src/screens/transfer/screen/transferStyles.js

@@ -5,6 +5,10 @@ export default EStyleSheet.create({
     flex: 1,
     backgroundColor: '$primaryBackgroundColor',
   },
+  keyboardAwareScrollContainer: {
+    backgroundColor: '$primaryBackgroundColor',
+    padding: 16,
+  },
   stepOneContainer: {
     zIndex: 2,
     paddingVertical: 16,