Fixed navigation template

Summary:
- [x] Explain the **motivation** for making this change.

It fixes #14313
Closes https://github.com/facebook/react-native/pull/14495

Differential Revision: D6042094

Pulled By: hramos

fbshipit-source-id: d70e42bfee0a22882bad91cb885fb0cfc91c7d38

local-cli/templates/HelloNavigation/App.js

@@ -1,5 +1,3 @@
-'use strict';
-
 /**
  * This is an example React Native app demonstrates ListViews, text input and
  * navigation between a few screens.

local-cli/templates/HelloNavigation/README.md

@@ -1,6 +1,6 @@
 # App template for new React Native apps
 
-This is a simple React Native app template which demonstrates a few basics concepts such as navigation between a few screens, ListViews, and handling text input.
+This is a simple React Native app template which demonstrates a few basics concepts such as navigation between a few screens, FlatLists, and handling text input.
 
 <img src="https://cloud.githubusercontent.com/assets/346214/22697898/ced66f52-ed4a-11e6-9b90-df6daef43199.gif" alt="Android Example" height="800" style="float: left"/>
 
@@ -13,7 +13,7 @@ The idea is to make it easier for people to get started with React Native. Curre
 - Navigating between screens
 - Handling text input and the software keyboard
 
-This app serves as a template used by `react-native init` so it is easier for anyone to get up and running quickly by having an app with a few screens and a ListView ready to go.
+This app serves as a template used by `react-native init` so it is easier for anyone to get up and running quickly by having an app with a few screens and a FlatList ready to go.
 
 ### Best practices
 
@@ -21,7 +21,7 @@ Another purpose of this app is to define best practices such as the folder struc
 
 ## Not using Redux
 
-This template intentionally doesn't use Redux. After discussing with a few people who have experience using Redux we concluded that adding Redux to this app targeted at beginners would make the code more confusing, and wouldn't clearly show the benefits of Redux (because the app is too small). There are already a few concepts to grasp - the React component lifecycle, rendeing lists, using async / await, handling the software keyboard. We thought that's the maximum amount of things to learn at once. It's better for everyone to see patterns in their codebase as the app grows and decide for themselves whether and when they need Redux. See also the post [You Might Not Need Redux](https://medium.com/@dan_abramov/you-might-not-need-redux-be46360cf367#.f3q7kq4b3) by [Dan Abramov](https://twitter.com/dan_abramov).
+This template intentionally doesn't use Redux. After discussing with a few people who have experience using Redux we concluded that adding Redux to this app targeted at beginners would make the code more confusing, and wouldn't clearly show the benefits of Redux (because the app is too small). There are already a few concepts to grasp - the React component lifecycle, rendering lists, using async / await, handling the software keyboard. We thought that's the maximum amount of things to learn at once. It's better for everyone to see patterns in their codebase as the app grows and decide for themselves whether and when they need Redux. See also the post [You Might Not Need Redux](https://medium.com/@dan_abramov/you-might-not-need-redux-be46360cf367#.f3q7kq4b3) by [Dan Abramov](https://twitter.com/dan_abramov).
 
 ## Not using Flow (for now)
 
@@ -34,7 +34,7 @@ We need your feedback. Do you have a lot of experience building React Native app
 ## How to use the template
 
 ```
-$ react-native init MyApp --version 0.42.0-rc.2 --template navigation
+$ react-native init MyApp --template navigation
 $ cd MyApp
 $ react-native run-android
 $ react-native run-ios

local-cli/templates/HelloNavigation/dependencies.json

@@ -1,3 +1,3 @@
 {
-  "react-navigation": "1.0.0-beta.5"
+  "react-navigation": "1.0.0-beta.11"
 }

local-cli/templates/HelloNavigation/views/HomeScreenTabNavigator.js

@@ -1,5 +1,3 @@
-'use strict';
-
 import { TabNavigator } from 'react-navigation';
 
 import ChatListScreen from './chat/ChatListScreen';

local-cli/templates/HelloNavigation/views/chat/ChatListScreen.js

@@ -1,10 +1,8 @@
-'use strict';
-
 import React, { Component } from 'react';
 import {
   ActivityIndicator,
   Image,
-  ListView,
+  FlatList,
   Platform,
   StyleSheet,
   View,
@@ -16,47 +14,41 @@ export default class ChatListScreen extends Component {
 
   static navigationOptions = {
     title: 'Chats',
-    header: {
-      visible: Platform.OS === 'ios',
-    },
-    tabBar: {
-      icon: ({ tintColor }) => (
-        <Image
-          // Using react-native-vector-icons works here too
-          source={require('./chat-icon.png')}
-          style={[styles.icon, {tintColor: tintColor}]}
-        />
-      ),
-    },
+    header: Platform.OS === 'ios' ? undefined : null,
+    tabBarIcon: ({ tintColor }) => (
+      <Image
+        // Using react-native-vector-icons works here too
+        source={require('./chat-icon.png')}
+        style={[styles.icon, {tintColor: tintColor}]}
+      />
+    ),
   }
 
   constructor(props) {
     super(props);
-    const ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
     this.state = {
       isLoading: true,
-      dataSource: ds,
     };
   }
 
   async componentDidMount() {
     const chatList = await Backend.fetchChatList();
     this.setState((prevState) => ({
-      dataSource: prevState.dataSource.cloneWithRows(chatList),
+      chatList,
       isLoading: false,
     }));
   }
 
-  // Binding the function so it can be passed to ListView below
-  // and 'this' works properly inside renderRow
-  renderRow = (name) => {
+  // Binding the function so it can be passed to FlatList below
+  // and 'this' works properly inside renderItem
+  renderItem = ({ item }) => {
     return (
       <ListItem
-        label={name}
+        label={item}
         onPress={() => {
           // Start fetching in parallel with animating
           this.props.navigation.navigate('Chat', {
-            name: name,
+            name: item,
           });
         }}
       />
@@ -72,9 +64,10 @@ export default class ChatListScreen extends Component {
       );
     }
     return (
-      <ListView
-        dataSource={this.state.dataSource}
-        renderRow={this.renderRow}
+      <FlatList
+        data={this.state.chatList}
+        renderItem={this.renderItem}
+        keyExtractor={(item, index) => index}
         style={styles.listView}
       />
     );

local-cli/templates/HelloNavigation/views/chat/ChatScreen.js

@@ -1,10 +1,8 @@
-'use strict';
-
 import React, { Component } from 'react';
 import {
   ActivityIndicator,
   Button,
-  ListView,
+  FlatList,
   StyleSheet,
   Text,
   TextInput,
@@ -15,16 +13,13 @@ import Backend from '../../lib/Backend';
 
 export default class ChatScreen extends Component {
 
-  static navigationOptions = {
-    title: (navigation) => `Chat with ${navigation.state.params.name}`,
-  }
-
+  static navigationOptions = ({ navigation }) => ({
+    title: `Chat with ${navigation.state.params.name}`,
+  });
   constructor(props) {
     super(props);
-    const ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
     this.state = {
       messages: [],
-      dataSource: ds,
       myMessage: '',
       isLoading: true,
     };
@@ -47,7 +42,6 @@ export default class ChatScreen extends Component {
     }
     this.setState((prevState) => ({
       messages: chat.messages,
-      dataSource: prevState.dataSource.cloneWithRows(chat.messages),
       isLoading: false,
     }));
   }
@@ -82,7 +76,6 @@ export default class ChatScreen extends Component {
       ];
       return {
         messages: messages,
-        dataSource: prevState.dataSource.cloneWithRows(messages),
         myMessage: '',
       };
     });
@@ -93,10 +86,10 @@ export default class ChatScreen extends Component {
     this.setState({myMessage: event.nativeEvent.text});
   }
 
-  renderRow = (message) => (
+  renderItem = ({ item }) => (
     <View style={styles.bubble}>
-      <Text style={styles.name}>{message.name}</Text>
-      <Text>{message.text}</Text>
+      <Text style={styles.name}>{item.name}</Text>
+      <Text>{item.text}</Text>
     </View>
   )
 
@@ -110,12 +103,13 @@ export default class ChatScreen extends Component {
     }
     return (
       <View style={styles.container}>
-        <ListView
-          dataSource={this.state.dataSource}
-          renderRow={this.renderRow}
-          style={styles.listView}
-          onLayout={this.scrollToBottom}
-        />
+        <FlatList
+           data={this.state.messages}
+           renderItem={this.renderItem}
+           keyExtractor={(item, index) => index}
+           style={styles.listView}
+         />
+
         <View style={styles.composer}>
           <TextInput
             ref={(textInput) => { this.textInput = textInput; }}

local-cli/templates/HelloNavigation/views/welcome/WelcomeScreen.js

@@ -1,5 +1,3 @@
-'use strict';
-
 import React, { Component } from 'react';
 import {
   Image,
@@ -14,18 +12,15 @@ export default class WelcomeScreen extends Component {
 
   static navigationOptions = {
     title: 'Welcome',
-    header: {
-      visible: Platform.OS === 'ios',
-    },
-    tabBar: {
-      icon: ({ tintColor }) => (
-        <Image
-          // Using react-native-vector-icons works here too
-          source={require('./welcome-icon.png')}
-          style={[styles.icon, {tintColor: tintColor}]}
-        />
-      ),
-    },
+    // You can now set header: null on any component to hide the header
+    header: Platform.OS === 'ios' ? undefined : null,
+    tabBarIcon: ({ tintColor }) => (
+      <Image
+        // Using react-native-vector-icons works here too
+        source={require('./welcome-icon.png')}
+        style={[styles.icon, {tintColor: tintColor}]}
+      />
+    ),
   }
 
   render() {

local-cli/templates/HelloNavigation/views/welcome/WelcomeText.android.js

@@ -1,5 +1,3 @@
-'use strict';
-
 import React, { Component } from 'react';
 import {
   StyleSheet,

local-cli/templates/HelloNavigation/views/welcome/WelcomeText.ios.js

@@ -1,5 +1,3 @@
-'use strict';
-
 import React, { Component } from 'react';
 import {
   StyleSheet,