update duration badge and example

.vscode/launch.json

+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Flutter",
+            "request": "launch",
+            "type": "dart"
+        }
+    ]
+}

example/lib/main.dart

 
       loadingDelegate: this,
       // if you want to build custom loading widget,extends LoadingDelegate, [see example/lib/main.dart]
+
+      badgeDelegate: const DurationBadgeDelegate(),
     );
 
     if (imgList == null) {

lib/photo.dart

 export 'package:photo/src/delegate/sort_delegate.dart';
 export 'package:photo/src/provider/i18n_provider.dart'
     show I18NCustomProvider, I18nProvider, CNProvider, ENProvider;
+export 'package:photo/src/delegate/badge_delegate.dart';
 
 class PhotoPicker {
   static PhotoPicker _instance;

lib/src/delegate/badge_delegate.dart

 abstract class BadgeDelegate {
   const BadgeDelegate();
 
-  Widget buildBadge(BuildContext context, AssetType type);
+  Widget buildBadge(BuildContext context, AssetType type, Duration duration);
 }
 
 class DefaultBadgeDelegate extends BadgeDelegate {
   });
 
   @override
-  Widget buildBadge(BuildContext context, AssetType type) {
+  Widget buildBadge(BuildContext context, AssetType type, Duration duration) {
     if (type == AssetType.video) {
       return Padding(
-        padding: const EdgeInsets.only(
-          top: 2.0,
-          left: 2.0,
-        ),
+        padding: const EdgeInsets.all(2.0),
         child: Align(
           alignment: alignment,
           child: Container(
     return Container();
   }
 }
+
+class DurationBadgeDelegate extends BadgeDelegate {
+  final AlignmentGeometry alignment;
+  const DurationBadgeDelegate({this.alignment = Alignment.bottomRight});
+
+  @override
+  Widget buildBadge(BuildContext context, AssetType type, Duration duration) {
+    if (type == AssetType.video) {
+      var s = duration.inSeconds;
+      var m = duration.inMinutes;
+      var h = duration.inHours;
+
+      String text =
+          "$h:${m.toString().padLeft(2, '0')}:${s.toString().padLeft(2, '0')}";
+
+      return Padding(
+        padding: const EdgeInsets.all(2.0),
+        child: Align(
+          alignment: alignment,
+          child: Container(
+            decoration: BoxDecoration(
+              color: Theme.of(context).primaryColor.withOpacity(0.65),
+            ),
+            child: Text(
+              text,
+              style: const TextStyle(
+                fontSize: 12.0,
+                color: Colors.white,
+              ),
+            ),
+            padding: const EdgeInsets.all(4.0),
+          ),
+        ),
+      );
+    }
+
+    return Container();
+  }
+}

lib/src/ui/page/photo_main_page.dart

       height: double.infinity,
       fit: BoxFit.cover,
     );
-    var badge = badgeDelegate?.buildBadge(context, entity.type);
-    if (badge == null) {
-      return image;
-    }
+    // FutureBuilder()
+    var badge = FutureBuilder<Duration>(
+      future: entity.videoDuration,
+      builder: (ctx, snapshot) {
+        if (snapshot.hasData && snapshot != null) {
+          var buildBadge =
+              badgeDelegate?.buildBadge(context, entity.type, snapshot.data);
+          if (buildBadge == null) {
+            return Container();
+          } else {
+            return buildBadge;
+          }
+        }else{
+          return Container();
+        }
+      },
+    );
+
     return Stack(
       children: <Widget>[
         image,

pubspec.lock

 # Generated by pub
 # See https://www.dartlang.org/tools/pub/glossary#lockfile
 packages:
-  analyzer:
-    dependency: transitive
-    description:
-      name: analyzer
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.32.4"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.5.0"
   async:
     dependency: transitive
     description:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.14.11"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.2"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.6"
-  csslib:
-    dependency: transitive
-    description:
-      name: csslib
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.14.5"
   flutter:
     dependency: "direct main"
     description: flutter
     description: flutter
     source: sdk
     version: "0.0.0"
-  front_end:
-    dependency: transitive
-    description:
-      name: front_end
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.1.4"
-  glob:
-    dependency: transitive
-    description:
-      name: glob
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.1.7"
-  html:
-    dependency: transitive
-    description:
-      name: html
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.13.3+3"
-  http:
-    dependency: transitive
-    description:
-      name: http
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.11.3+17"
-  http_multi_server:
-    dependency: transitive
-    description:
-      name: http_multi_server
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.5"
-  http_parser:
-    dependency: transitive
-    description:
-      name: http_parser
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "3.1.3"
-  io:
-    dependency: transitive
-    description:
-      name: io
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.3.3"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.6.1+1"
-  json_rpc_2:
-    dependency: transitive
-    description:
-      name: json_rpc_2
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.9"
-  kernel:
-    dependency: transitive
-    description:
-      name: kernel
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.3.4"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.11.3+2"
   matcher:
     dependency: transitive
     description:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.6"
-  mime:
-    dependency: transitive
-    description:
-      name: mime
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.9.6+2"
-  multi_server_socket:
-    dependency: transitive
-    description:
-      name: multi_server_socket
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.2"
-  node_preamble:
-    dependency: transitive
-    description:
-      name: node_preamble
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.4.4"
-  package_config:
-    dependency: transitive
-    description:
-      name: package_config
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.5"
-  package_resolver:
-    dependency: transitive
-    description:
-      name: package_resolver
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.4"
   path:
     dependency: transitive
     description:
       name: photo_manager
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.1.8"
-  plugin:
-    dependency: transitive
-    description:
-      name: plugin
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.2.0+3"
-  pool:
-    dependency: transitive
-    description:
-      name: pool
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.3.6"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.4.2"
+    version: "0.1.9"
   quiver:
     dependency: transitive
     description:
       name: quiver
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.0.0+1"
-  shelf:
-    dependency: transitive
-    description:
-      name: shelf
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.7.3+3"
-  shelf_packages_handler:
-    dependency: transitive
-    description:
-      name: shelf_packages_handler
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.4"
-  shelf_static:
-    dependency: transitive
-    description:
-      name: shelf_static
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.2.8"
-  shelf_web_socket:
-    dependency: transitive
-    description:
-      name: shelf_web_socket
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.2.2+4"
+    version: "2.0.1"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
-  source_map_stack_trace:
-    dependency: transitive
-    description:
-      name: source_map_stack_trace
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.1.5"
-  source_maps:
-    dependency: transitive
-    description:
-      name: source_maps
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.10.7"
   source_span:
     dependency: transitive
     description:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.0.1"
-  test:
+  test_api:
     dependency: transitive
     description:
-      name: test
+      name: test_api
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.3.0"
+    version: "0.2.1"
   typed_data:
     dependency: transitive
     description:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.6"
-  utf:
-    dependency: transitive
-    description:
-      name: utf
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.9.0+5"
   vector_math:
     dependency: transitive
     description:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.8"
-  vm_service_client:
-    dependency: transitive
-    description:
-      name: vm_service_client
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.2.6"
-  watcher:
-    dependency: transitive
-    description:
-      name: watcher
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "0.9.7+10"
-  web_socket_channel:
-    dependency: transitive
-    description:
-      name: web_socket_channel
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.0.9"
-  yaml:
-    dependency: transitive
-    description:
-      name: yaml
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.1.15"
 sdks:
-  dart: ">=2.0.0-dev.68.0 <3.0.0"
+  dart: ">=2.0.0 <3.0.0"

pubspec.yaml

   flutter:
     sdk: flutter
 
-  photo_manager: ^0.1.8
+  photo_manager: ^0.1.9
   # photo_manager:
   #   git:
   #     url: https://github.com/CaiJingLong/flutter_photo_manager.git