From 6952c7b97c10bede9b93f39781f7406f86eb2793 Mon Sep 17 00:00:00 2001
From: kdxcxs <cx@kdxcxs.com>
Date: Sun, 6 Dec 2020 14:25:14 +0800
Subject: [PATCH] feat: support confirming exiting app by Android back action

---
 src/ui/YooForumUI.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/ui/YooForumUI.js b/src/ui/YooForumUI.js
index 86b4099..053de93 100644
--- a/src/ui/YooForumUI.js
+++ b/src/ui/YooForumUI.js
@@ -10,6 +10,7 @@ import {
   Dimensions,
   Pressable,
   BackHandler,
+  ToastAndroid,
 } from 'react-native';
 import YooForumTopic from '../component/YooForumTopic';
 import YooReply from './YooReply';
@@ -85,6 +86,7 @@ export default class YooForumUI extends Component {
       translateX: new Animated.Value(0),
       currentReplies: [],
       replyTranslateY: new Animated.Value(0),
+      lastPressingBack: 0,
     };
     this.replyRef = createRef();
     this.showDetail = this.showDetail.bind(this);
@@ -101,9 +103,15 @@ export default class YooForumUI extends Component {
   }
 
   handleAndroidBack() {
-    if (this.currentForumTopicUI){
+    if (this.currentForumTopicUI) {
       this.hideDetail();
       return true;
+    } else if (new Date().getTime() - this.state.lastPressingBack <= 1000) {
+      BackHandler.exitApp();
+    } else {
+      this.setState({lastPressingBack: new Date().getTime()});
+      ToastAndroid.show('再按一次以退出Yoomooc', ToastAndroid.SHORT);
+      return true;
     }
   }