Show empty view when list is empty

KingWu · Jan 13, 2019 · 7f5be04 · 7f5be04
1 parent 1247e23
commit 7f5be04
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Showing 6 changed files with 73 additions and 43 deletions.
diff --git a/lib/app/ui/page/HomePage.dart b/lib/app/ui/page/HomePage.dart
@@ -114,50 +114,70 @@ class _HomePageState extends State<HomePage> {
     return StreamBuilder(
       stream: bloc.feedList,
       builder: (context, snapshot) {
-        List<HomeListItem> feedList = snapshot.data;
-        return ListView.builder(
-            key: listViewKey,
-            scrollDirection: Axis.vertical,
-            itemCount: null != feedList ? feedList.length : 0,
-            itemBuilder: (context, index) {
+
+
+        switch(snapshot.connectionState){
+          case ConnectionState.none:
+          case ConnectionState.waiting:{
+            return Center(
+              child: Text(S.of(context).dialogLoading)
+            );
+          }
+          case ConnectionState.done:
+          case ConnectionState.active:{
+
+            List<HomeListItem> feedList = snapshot.data;
+            if(0 == feedList.length){
+              return Center(
+                child: Text(S.of(context).homeEmptyList)
+              );
+            }
+
+            return ListView.builder(
+                key: listViewKey,
+                scrollDirection: Axis.vertical,
+                itemCount: null != feedList ? feedList.length : 0,
+                itemBuilder: (context, index) {
 //              Log.info('index : $index');
-              HomeListItem listItem = feedList[index];
+                  HomeListItem listItem = feedList[index];
 
-              if(null == _keys[listItem.getId()]){
-                _keys[listItem.getId()] = ValueKey(listItem.getId());
-              }
+                  if(null == _keys[listItem.getId()]){
+                    _keys[listItem.getId()] = ValueKey(listItem.getId());
+                  }
 
-              var key = _keys[listItem.getId()];
+                  var key = _keys[listItem.getId()];
 
 
-              if(HomeListType.TYPE_FEATURE == listItem.type){
-                return Container(
-                  key: key,
-                  child: buildFeatureListItem(listItem),
-                );
-              }
+                  if(HomeListType.TYPE_FEATURE == listItem.type){
+                    return Container(
+                      key: key,
+                      child: buildFeatureListItem(listItem),
+                    );
+                  }
 
-              bool isFeatureListItemExist = HomeListType.TYPE_FEATURE == feedList[0].type;
-
-              return StreamListItem<HomeListItem, num>(
-                  key: key,
-                  initialData: listItem,
-                  stream: bloc.noticeItemUpdate,
-                  comparator: (HomeListItem listItem, num appId){
-                    if(HomeListType.TYPE_TOP_APP == listItem.type){
-                      TopAppListItem topAppListItem = listItem;
-                      return topAppListItem.entry.trackId == appId;
-                    }
-
-                    return false;
-                  },
-                  builder: (BuildContext context, HomeListItem listItem){
+                  bool isFeatureListItemExist = HomeListType.TYPE_FEATURE == feedList[0].type;
+
+                  return StreamListItem<HomeListItem, num>(
+                      key: key,
+                      initialData: listItem,
+                      stream: bloc.noticeItemUpdate,
+                      comparator: (HomeListItem listItem, num appId){
+                        if(HomeListType.TYPE_TOP_APP == listItem.type){
+                          TopAppListItem topAppListItem = listItem;
+                          return topAppListItem.entry.trackId == appId;
+                        }
+
+                        return false;
+                      },
+                      builder: (BuildContext context, HomeListItem listItem){
 //                    Log.info('Updated : $index');
-                    return buildTopAppListItem(listItem, index, isFeatureListItemExist);
-                  }
-              );
-            }
-        );
+                        return buildTopAppListItem(listItem, index, isFeatureListItemExist);
+                      }
+                  );
+                }
+            );
+          }
+        }
       }
     );
   }

diff --git a/lib/generated/i18n.dart b/lib/generated/i18n.dart
@@ -22,6 +22,7 @@ class S implements WidgetsLocalizations {
   String get detailRate => "Comments";
   String get dialogLoading => "Loading ...";
   String get hello => "Hello";
+  String get homeEmptyList => "No results";
   String get homeRecommend => "Recommend";
   String get homeSearchHint => "Search ...";
   String get title => "Hello world App";
@@ -38,6 +39,8 @@ class $de extends S {
   @override
   String get dialogLoading => "Wird geladen ...";
   @override
+  String get homeEmptyList => "Keine Ergebnisse";
+  @override
   String get hello => "Hello De";
   @override
   String get detailRate => "Bemerkungen";
@@ -58,6 +61,8 @@ class $zh_TW extends S {
   @override
   String get dialogLoading => "載入中 ...";
   @override
+  String get homeEmptyList => "沒有結果";
+  @override
   String get hello => "Hello";
   @override
   String get detailRate => "評論";
@@ -78,6 +83,8 @@ class $ja extends S {
   @override
   String get dialogLoading => "読み込み中 ...";
   @override
+  String get homeEmptyList => "結果なし";
+  @override
   String get hello => "Hello";
   @override
   String get detailRate => "コメント";

diff --git a/res/values/strings_de.arb b/res/values/strings_de.arb
@@ -4,6 +4,6 @@
   "homeSearchHint": "Suche ...",
   "homeRecommend": "Empfehlen",
   "dialogLoading": "Wird geladen ...",
-  "detailRate": "Bemerkungen"
-
+  "detailRate": "Bemerkungen",
+  "homeEmptyList": "Keine Ergebnisse"
 }
diff --git a/res/values/strings_en.arb b/res/values/strings_en.arb
@@ -4,6 +4,6 @@
   "homeSearchHint": "Search ...",
   "homeRecommend": "Recommend",
   "dialogLoading": "Loading ...",
-  "detailRate": "Comments"
-
+  "detailRate": "Comments",
+  "homeEmptyList": "No results"
 }
diff --git a/res/values/strings_ja.arb b/res/values/strings_ja.arb
@@ -4,6 +4,7 @@
   "homeSearchHint": "検索 ...",
   "homeRecommend": "おすすめ",
   "dialogLoading": "読み込み中 ...",
-  "detailRate": "コメント"
+  "detailRate": "コメント",
+  "homeEmptyList": "結果なし"
 
 }
diff --git a/res/values/strings_zh_TW.arb b/res/values/strings_zh_TW.arb
@@ -4,5 +4,7 @@
   "homeSearchHint": "搜索 ...",
   "homeRecommend": "推介",
   "dialogLoading": "載入中 ...",
-  "detailRate": "評論"
+  "detailRate": "評論",
+  "homeEmptyList": "沒有結果"
+
 }