add analysis option

analysis_options.yaml

-# Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
+# Specify analysis options.
 #
-# Google internally enforced rules. See README.md for more information,
-# including a list of lints that are intentionally _not_ enforced.
+# Until there are meta linter rules, each desired lint must be explicitly enabled.
+# See: https://github.com/dart-lang/linter/issues/288
+#
+# For a list of lints, see: http://dart-lang.github.io/linter/lints/
+# See the configuration guide for more
+# https://github.com/dart-lang/sdk/tree/master/pkg/analyzer#configuring-the-analyzer
+#
+# There are other similar analysis options files in the flutter repos,
+# which should be kept in sync with this file:
+#
+#   - analysis_options.yaml (this file)
+#   - packages/flutter/lib/analysis_options_user.yaml
+#   - https://github.com/flutter/plugins/blob/master/analysis_options.yaml
+#   - https://github.com/flutter/engine/blob/master/analysis_options.yaml
+#
+# This file contains the analysis options used by Flutter tools, such as IntelliJ,
+# Android Studio, and the `flutter analyze` command.
 
+analyzer:
+  strong-mode:
+    implicit-dynamic: false
+  errors:
+    # treat missing required parameters as a warning (not a hint)
+    missing_required_param: warning
+    # treat missing returns as a warning (not a hint)
+    missing_return: warning
+    # allow having TODOs in the code
+    todo: ignore
+    # Ignore analyzer hints for updating pubspecs when using Future or
+    # Stream and not importing dart:async
+    # Please see https://github.com/flutter/flutter/pull/24528 for details.
+    sdk_version_async_exported_from_core: ignore
+  exclude:
+    - "bin/cache/**"
+    # the following two are relative to the stocks example and the flutter package respectively
+    # see https://github.com/dart-lang/sdk/issues/28463
+    - "lib/i18n/messages_*.dart"
+    - "lib/src/http/**"
+    - "example/**"
+    - "example_swift/**"
+    - "test/**"
 linter:
   rules:
+    # these rules are documented on and in the same order as
+    # the Dart Lint rules page to make maintenance easier
+    # https://github.com/dart-lang/linter/blob/master/example/all.yaml
+    - always_declare_return_types
+    - always_put_control_body_on_new_line
+    # - always_put_required_named_parameters_first # we prefer having parameters in the same order as fields https://github.com/flutter/flutter/issues/10219
+    - always_require_non_null_named_parameters
+    - always_specify_types
+    - annotate_overrides
+    # - avoid_annotating_with_dynamic # conflicts with always_specify_types
+    # - avoid_as # required for implicit-casts: true
+    - avoid_bool_literals_in_conditional_expressions
+    # - avoid_catches_without_on_clauses # we do this commonly
+    # - avoid_catching_errors # we do this commonly
+    - avoid_classes_with_only_static_members
+    # - avoid_double_and_int_checks # only useful when targeting JS runtime
     - avoid_empty_else
+    - avoid_field_initializers_in_const_classes
+    - avoid_function_literals_in_foreach_calls
+    # - avoid_implementing_value_types # not yet tested
     - avoid_init_to_null
+    # - avoid_js_rounded_ints # only useful when targeting JS runtime
+    - avoid_null_checks_in_equality_operators
+    # - avoid_positional_boolean_parameters # not yet tested
+    # - avoid_private_typedef_functions # we prefer having typedef (discussion in https://github.com/flutter/flutter/pull/16356)
     - avoid_relative_lib_imports
+    - avoid_renaming_method_parameters
     - avoid_return_types_on_setters
-    - avoid_shadowing_type_parameters
+    # - avoid_returning_null # there are plenty of valid reasons to return null
+    # - avoid_returning_null_for_future # not yet tested
+    - avoid_returning_null_for_void
+    # - avoid_returning_this # there are plenty of valid reasons to return this
+    # - avoid_setters_without_getters # not yet tested
+    # - avoid_shadowing_type_parameters # not yet tested
+    # - avoid_single_cascade_in_expression_statements # not yet tested
+    - avoid_slow_async_io
     - avoid_types_as_parameter_names
-    - curly_braces_in_flow_control_structures
+    # - avoid_types_on_closure_parameters # conflicts with always_specify_types
+    - avoid_unused_constructor_parameters
+    - avoid_void_async
+    - await_only_futures
+    - camel_case_types
+    - cancel_subscriptions
+    # - cascade_invocations # not yet tested
+    # - close_sinks # not reliable enough
+    # - comment_references # blocked on https://github.com/flutter/flutter/issues/20765
+    # - constant_identifier_names # needs an opt-out https://github.com/dart-lang/linter/issues/204
+    - control_flow_in_finally
+    # - curly_braces_in_flow_control_structures # not yet tested
+    # - diagnostic_describe_all_properties # not yet tested
+    - directives_ordering
     - empty_catches
     - empty_constructor_bodies
+    - empty_statements
+    # - file_names # not yet tested
+    - flutter_style_todos
+    - hash_and_equals
+    - implementation_imports
+    # - invariant_booleans # too many false positives: https://github.com/dart-lang/linter/issues/811
+    - iterable_contains_unrelated_type
+    # - join_return_with_assignment # not yet tested
     - library_names
     - library_prefixes
+    # - lines_longer_than_80_chars # not yet tested
+    - list_remove_unrelated_type
+    # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
+    - no_adjacent_strings_in_list
     - no_duplicate_case_values
-    - null_closures
+    - non_constant_identifier_names
+    # - null_closures  # not yet tested
+    # - omit_local_variable_types # opposite of always_specify_types
+    # - one_member_abstracts # too many false positives
+    # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
+    - overridden_fields
+    - package_api_docs
+    - package_names
+    - package_prefixed_library_names
+    # - parameter_assignments # we do this commonly
+    - prefer_adjacent_string_concatenation
+    - prefer_asserts_in_initializer_lists
+    # - prefer_asserts_with_message # not yet tested
+    - prefer_collection_literals
+    - prefer_conditional_assignment
+    - prefer_const_constructors
+    - prefer_const_constructors_in_immutables
+    - prefer_const_declarations
+    - prefer_const_literals_to_create_immutables
+    # - prefer_constructors_over_static_methods # not yet tested
     - prefer_contains
+    # - prefer_double_quotes # opposite of prefer_single_quotes
     - prefer_equal_for_default_values
+    # - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
+    - prefer_final_fields
+    # - prefer_final_in_for_each # not yet tested
+    - prefer_final_locals
+    # - prefer_for_elements_to_map_fromIterable # not yet tested
+    - prefer_foreach
+    # - prefer_function_declarations_over_variables # not yet tested
+    - prefer_generic_function_type_aliases
+    - prefer_if_elements_to_conditional_expressions
+    - prefer_if_null_operators
+    - prefer_initializing_formals
+    - prefer_inlined_adds
+    # - prefer_int_literals # not yet tested
+    # - prefer_interpolation_to_compose_strings # not yet tested
     - prefer_is_empty
     - prefer_is_not_empty
     - prefer_iterable_whereType
+    # - prefer_mixin # https://github.com/dart-lang/language/issues/32
+    # - prefer_null_aware_operators # disable until NNBD, see https://github.com/flutter/flutter/pull/32711#issuecomment-492930932
+    - prefer_single_quotes
+    - prefer_spread_collections
+    - prefer_typing_uninitialized_variables
+    - prefer_void_to_null
+    # - provide_deprecation_message # not yet tested
+    # - public_member_api_docs # enabled on a case-by-case basis; see e.g. packages/analysis_options.yaml
     - recursive_getters
     - slash_for_doc_comments
+    # - sort_child_properties_last # not yet tested
+    - sort_constructors_first
+    - sort_pub_dependencies
+    - sort_unnamed_constructors_first
+    - test_types_in_equals
+    - throw_in_finally
+    # - type_annotate_public_apis # subset of always_specify_types
     - type_init_formals
-    - unawaited_futures
+    # - unawaited_futures # too many false positives
+    # - unnecessary_await_in_return # not yet tested
+    - unnecessary_brace_in_string_interps
     - unnecessary_const
+    - unnecessary_getters_setters
+    # - unnecessary_lambdas # has false positives: https://github.com/dart-lang/linter/issues/498
     - unnecessary_new
+    - unnecessary_null_aware_assignments
     - unnecessary_null_in_if_null_operators
+    - unnecessary_overrides
+    - unnecessary_parenthesis
+    - unnecessary_statements
+    - unnecessary_this
     - unrelated_type_equality_checks
+    # - unsafe_html # not yet tested
+    - use_full_hex_values_for_flutter_colors
+    # - use_function_type_syntax_for_parameters # not yet tested
     - use_rethrow_when_possible
+    # - use_setters_to_change_properties # not yet tested
+    # - use_string_buffers # has false positives: https://github.com/dart-lang/sdk/issues/34182
+    # - use_to_and_as_if_applicable # has false positives, so we prefer to catch this by code-review
     - valid_regexps
+    # - void_checks # not yet tested

example/lib/base.dart

-
-Future<Map<String,dynamic>> open(String url,{Map<String,dynamic> urlParams,Map<String,dynamic> exts}){
-
-}
-
-void close(String id,{Map<String,dynamic> result,Map<String,dynamic> exts}){
-
-}
\ No newline at end of file

example/lib/simple_page_widgets.dart

@@ -31,7 +31,7 @@ class FirstRouteWidget extends StatelessWidget {
                   child: Text('Present second route'),
                   onPressed: () {
                     print("Present second page!");
-                    FlutterBoost.singleton.open("second",urlParams:{"present":true}).then((Map value) {
+                    FlutterBoost.singleton.open("second",urlParams:<dynamic,dynamic>{"present":true}).then((Map value) {
                       print(
                           "call me when page is finished. did recieve second route result $value");
                     });
@@ -79,7 +79,7 @@ class SecondRouteWidget extends StatelessWidget {
             BoostContainerSettings settings =
                 BoostContainer.of(context).settings;
             FlutterBoost.singleton.close(settings.uniqueId,
-                result: {"result": "data from second"});
+                result: <dynamic,dynamic>{"result": "data from second"});
           },
           child: Text('Go back with result!'),
         ),
@@ -195,7 +195,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("sample://nativePage", urlParams: {
+                      .open("sample://nativePage", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -212,7 +212,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("first", urlParams: {
+                      .open("first", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -229,7 +229,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("second", urlParams: {
+                      .open("second", urlParams:<dynamic,dynamic> {
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -246,7 +246,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("tab", urlParams: {
+                      .open("tab", urlParams:<dynamic,dynamic> {
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -263,7 +263,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("sample://flutterPage", urlParams: {
+                      .open("sample://flutterPage", urlParams:<dynamic,dynamic> {
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -277,8 +277,8 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                         style: TextStyle(fontSize: 22.0, color: Colors.black),
                       )),
                   onTap: () {
-                    Navigator.push(context,
-                        MaterialPageRoute(builder: (_) => PushWidget()));
+                  Navigator.push<dynamic>(context,
+                        MaterialPageRoute<dynamic>(builder: (_) => PushWidget()));
                   },
                 ),
 
@@ -292,8 +292,8 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                       style: TextStyle(fontSize: 22.0, color: Colors.black),
                     )),
                 onTap: () {
-                  Navigator.push(context,
-                      MaterialPageRoute(builder: (_) => PlatformRouteWidget()));
+                  Navigator.push<dynamic>(context,
+                      MaterialPageRoute<dynamic>(builder: (_) => PlatformRouteWidget()));
                 },
               ),
                 InkWell(

example/lib/test_input.dart

@@ -134,7 +134,7 @@ class _TestTextFieldState extends State<TestTextField> {
       if (_node.hasFocus) {
         print('showBottomSheet');
         _controller = Scaffold.of(context)
-            .showBottomSheet((BuildContext ctx) => Container(
+            .showBottomSheet<dynamic>((BuildContext ctx) => Container(
                   width: double.infinity,
                   height: 36.0,
                   color: Colors.deepPurple,

example_swift/lib/base.dart

-
-Future<Map<String,dynamic>> open(String url,{Map<String,dynamic> urlParams,Map<String,dynamic> exts}){
-
-}
-
-void close(String id,{Map<String,dynamic> result,Map<String,dynamic> exts}){
-
-}
\ No newline at end of file

example_swift/lib/simple_page_widgets.dart

@@ -38,7 +38,7 @@ class SecondRouteWidget extends StatelessWidget {
             BoostContainerSettings settings =
                 BoostContainer.of(context).settings;
             FlutterBoost.singleton.close(settings.uniqueId,
-                result: {"result": "data from second"});
+                result: <dynamic,dynamic>{"result": "data from second"});
           },
           child: Text('Go back with result!'),
         ),
@@ -102,7 +102,7 @@ class FlutterRouteWidget extends StatelessWidget {
             ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
             ///例如：sample://nativePage?aaa=bbb
             onTap: () =>
-                FlutterBoost.singleton.open("sample://nativePage", urlParams: {
+                FlutterBoost.singleton.open("sample://nativePage", urlParams: <dynamic,dynamic>{
                   "query": {"aaa": "bbb"}
                 }),
           ),
@@ -119,7 +119,7 @@ class FlutterRouteWidget extends StatelessWidget {
             ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
             ///例如：sample://nativePage?aaa=bbb
             onTap: () =>
-                FlutterBoost.singleton.open("sample://flutterPage", urlParams: {
+                FlutterBoost.singleton.open("sample://flutterPage", urlParams: <dynamic,dynamic>{
                   "query": {"aaa": "bbb"}
                 }),
           ),
@@ -133,8 +133,8 @@ class FlutterRouteWidget extends StatelessWidget {
                   style: TextStyle(fontSize: 22.0, color: Colors.black),
                 )),
             onTap: () {
-              Navigator.push(
-                  context, MaterialPageRoute(builder: (_) => PushWidget()));
+              Navigator.push<dynamic>(
+                  context, MaterialPageRoute<dynamic>(builder: (_) => PushWidget()));
             },
           ),
           InkWell(

example_swift/lib/test_input.dart

@@ -134,7 +134,7 @@ class _TestTextFieldState extends State<TestTextField> {
       if (_node.hasFocus) {
         print('showBottomSheet');
         _controller = Scaffold.of(context)
-            .showBottomSheet((BuildContext ctx) => Container(
+            .showBottomSheet<dynamic>((BuildContext ctx) => Container(
                   width: double.infinity,
                   height: 36.0,
                   color: Colors.deepPurple,

lib/channel/boost_channel.dart

@@ -36,7 +36,7 @@ class BoostChannel {
   final Set<MethodHandler> _methodHandlers = Set();
 
   BoostChannel() {
-    _methodChannel.setMethodCallHandler((MethodCall call){
+    _methodChannel.setMethodCallHandler((MethodCall call) {
       if (call.method == "__event__") {
         String name = call.arguments["name"];
         Map arg = call.arguments["arguments"];
@@ -46,13 +46,13 @@ class BoostChannel {
             l(name, arg);
           }
         }
-      }else{
-        for(MethodHandler handler in _methodHandlers) {
+      } else {
+        for (MethodHandler handler in _methodHandlers) {
           handler(call);
         }
       }
 
-      return Future.value();
+      return Future<dynamic>.value();
     });
   }
 
@@ -62,31 +62,33 @@ class BoostChannel {
     }
 
     if (arguments == null) {
-      arguments = Map();
+      arguments = Map<dynamic, dynamic>();
     }
 
-    Map msg = Map();
+    Map msg = Map<dynamic, dynamic>();
     msg["name"] = name;
     msg["arguments"] = arguments;
-    _methodChannel.invokeMethod("__event__", msg);
+    _methodChannel.invokeMethod<dynamic>("__event__", msg);
   }
 
-  Future<T> invokeMethod<T>(String method, [ dynamic arguments ]) async {
+  Future<T> invokeMethod<T>(String method, [dynamic arguments]) async {
     assert(method != "__event__");
 
-    return _methodChannel.invokeMethod<T>(method,arguments);
+    return _methodChannel.invokeMethod<T>(method, arguments);
   }
 
-  Future<List<T>> invokeListMethod<T>(String method, [ dynamic arguments ]) async {
+  Future<List<T>> invokeListMethod<T>(String method,
+      [dynamic arguments]) async {
     assert(method != "__event__");
 
-    return _methodChannel.invokeListMethod<T>(method,arguments);
+    return _methodChannel.invokeListMethod<T>(method, arguments);
   }
 
-  Future<Map<K, V>> invokeMapMethod<K, V>(String method, [ dynamic arguments ]) async {
+  Future<Map<K, V>> invokeMapMethod<K, V>(String method,
+      [dynamic arguments]) async {
     assert(method != "__event__");
 
-    return _methodChannel.invokeMapMethod<K, V>(method,arguments);
+    return _methodChannel.invokeMapMethod<K, V>(method, arguments);
   }
 
   VoidCallback addEventListener(String name, EventListener listener) {
@@ -110,7 +112,7 @@ class BoostChannel {
 
     _methodHandlers.add(handler);
 
-    return (){
+    return () {
       _methodHandlers.remove(handler);
     };
   }

lib/container/boost_container.dart

@@ -155,7 +155,6 @@ class BoostContainerState extends NavigatorState {
   @override
   void didUpdateWidget(Navigator oldWidget) {
     super.didUpdateWidget(oldWidget);
-
   }
 
   @override
@@ -189,6 +188,7 @@ class BoostContainerState extends NavigatorState {
           break;
       }
     }
+    return false;
   }
 
   @override
@@ -258,13 +258,10 @@ class ContainerElement extends StatefulElement {
 }
 
 class ContainerNavigatorObserver extends NavigatorObserver {
-
-  static final Set<NavigatorObserver> boostObservers =
-      Set<NavigatorObserver>();
+  static final Set<NavigatorObserver> boostObservers = Set<NavigatorObserver>();
 
   ContainerNavigatorObserver();
 
-
   factory ContainerNavigatorObserver.bindContainerManager() =>
       ContainerNavigatorObserver();
 
@@ -306,4 +303,3 @@ class ContainerNavigatorObserver extends NavigatorObserver {
     }
   }
 }
-

lib/container/container_coordinator.dart

@@ -266,13 +266,11 @@ class ContainerCoordinator {
   }
 
   bool _nativeContainerWillDealloc(String name, Map params, String pageId) {
-    try{
-
+    try {
       performContainerLifeCycle(_createContainerSettings(name, params, pageId),
           ContainerLifeCycle.Destroy);
-    } catch (e){
-      Logger.log(
-          'nativeContainerWillDealloc error: ${e}' );
+    } catch (e) {
+      Logger.log('nativeContainerWillDealloc error: ${e}');
     }
     FlutterBoost.containerManager?.remove(pageId);
 

lib/container/container_manager.dart

@@ -76,7 +76,6 @@ class ContainerManagerState extends State<BoostContainerManager> {
 
   bool get foreground => _foreground;
 
-
   //Number of containers.
   int get containerCounts => _offstage.length;
 
@@ -138,7 +137,8 @@ class ContainerManagerState extends State<BoostContainerManager> {
     properties['newName'] = now;
     properties['oldName'] = old;
 
-    FlutterBoost.singleton.channel.invokeMethod('onShownContainerChanged',properties);
+    FlutterBoost.singleton.channel
+        .invokeMethod<dynamic>('onShownContainerChanged', properties);
   }
 
   void _refreshOverlayEntries() {
@@ -345,4 +345,3 @@ class _ContainerOverlayEntry extends OverlayEntry {
     super.remove();
   }
 }
-

lib/flutter_boost.dart

@@ -44,7 +44,6 @@ typedef void PostPushRoute(
     String url, String uniqueId, Map params, Route route, Future result);
 
 class FlutterBoost {
-
   static final FlutterBoost _instance = FlutterBoost();
   final GlobalKey<ContainerManagerState> containerManagerKey =
       GlobalKey<ContainerManagerState>();
@@ -60,19 +59,14 @@ class FlutterBoost {
       {TransitionBuilder builder,
       PrePushRoute prePush,
       PostPushRoute postPush}) {
-
-    if(Platform.isAndroid){
-
-      WidgetsBinding.instance.addPostFrameCallback((_){
-
-        singleton.channel.invokeMethod<Map>('pageOnStart').then((Map pageInfo){
-
+    if (Platform.isAndroid) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        singleton.channel.invokeMethod<Map>('pageOnStart').then((Map pageInfo) {
           if (pageInfo == null || pageInfo.isEmpty) return;
 
           if (pageInfo.containsKey("name") &&
               pageInfo.containsKey("params") &&
               pageInfo.containsKey("uniqueId")) {
-
             ContainerCoordinator.singleton.nativeContainerDidShow(
                 pageInfo["name"], pageInfo["params"], pageInfo["uniqueId"]);
           }
@@ -80,7 +74,6 @@ class FlutterBoost {
       });
     }
 
-    
     return (BuildContext context, Widget child) {
       assert(child is Navigator, 'child must be Navigator, what is wrong?');
 
@@ -102,7 +95,7 @@ class FlutterBoost {
 
   BoostChannel get channel => _boostChannel;
 
-  FlutterBoost(){
+  FlutterBoost() {
     ContainerCoordinator(_boostChannel);
   }
 
@@ -116,30 +109,29 @@ class FlutterBoost {
     ContainerCoordinator.singleton.registerPageBuilders(builders);
   }
 
-  Future<Map<dynamic,dynamic>> open(String url,{Map<dynamic,dynamic> urlParams,Map<dynamic,dynamic> exts}){
-
+  Future<Map<dynamic, dynamic>> open(String url,
+      {Map<dynamic, dynamic> urlParams, Map<dynamic, dynamic> exts}) {
     Map<dynamic, dynamic> properties = new Map<dynamic, dynamic>();
     properties["url"] = url;
     properties["urlParams"] = urlParams;
     properties["exts"] = exts;
-    return channel.invokeMethod<Map<dynamic,dynamic>>(
-        'openPage', properties);
+    return channel.invokeMethod<Map<dynamic, dynamic>>('openPage', properties);
   }
 
-  Future<bool> close(String id,{Map<dynamic,dynamic> result,Map<dynamic,dynamic> exts}){
-
+  Future<bool> close(String id,
+      {Map<dynamic, dynamic> result, Map<dynamic, dynamic> exts}) {
     assert(id != null);
 
     BoostContainerSettings settings = containerManager?.onstageSettings;
     Map<dynamic, dynamic> properties = new Map<dynamic, dynamic>();
 
-    if(exts == null){
-      exts = Map<dynamic,dynamic>();
+    if (exts == null) {
+      exts = Map<dynamic, dynamic>();
     }
 
     exts["params"] = settings.params;
 
-    if(!exts.containsKey("animated")){
+    if (!exts.containsKey("animated")) {
       exts["animated"] = true;
     }
 
@@ -155,28 +147,30 @@ class FlutterBoost {
     return channel.invokeMethod<bool>('closePage', properties);
   }
 
-  Future<bool> closeCurrent({Map<String,dynamic> result,Map<String,dynamic> exts}) {
+  Future<bool> closeCurrent(
+      {Map<String, dynamic> result, Map<String, dynamic> exts}) {
     BoostContainerSettings settings = containerManager?.onstageSettings;
-    if(exts == null){
-      exts = Map<String,dynamic>();
+    if (exts == null) {
+      exts = Map<String, dynamic>();
     }
     exts["params"] = settings.params;
-    if(!exts.containsKey("animated")){
+    if (!exts.containsKey("animated")) {
       exts["animated"] = true;
     }
-    return close(settings.uniqueId,result: result,exts: exts);
+    return close(settings.uniqueId, result: result, exts: exts);
   }
 
-  Future<bool> closeByContext(BuildContext context,{Map<String,dynamic> result,Map<String,dynamic> exts}) {
+  Future<bool> closeByContext(BuildContext context,
+      {Map<String, dynamic> result, Map<String, dynamic> exts}) {
     BoostContainerSettings settings = containerManager?.onstageSettings;
-    if(exts == null){
-      exts = Map<String,dynamic>();
+    if (exts == null) {
+      exts = Map<String, dynamic>();
     }
     exts["params"] = settings.params;
-    if(!exts.containsKey("animated")){
+    if (!exts.containsKey("animated")) {
       exts["animated"] = true;
     }
-    return close(settings.uniqueId,result: result,exts: exts);
+    return close(settings.uniqueId, result: result, exts: exts);
   }
 
   ///register for Container changed callbacks
@@ -191,6 +185,4 @@ class FlutterBoost {
   ///register callbacks for Navigators push & pop
   void addBoostNavigatorObserver(NavigatorObserver observer) =>
       ContainerNavigatorObserver.boostObservers.add(observer);
-
-
 }

lib/support/logger.dart

@@ -23,7 +23,7 @@
  */
 class Logger {
   static void log(String msg) {
-    assert((){
+    assert(() {
       print('FlutterBoost#$msg');
       return true;
     }());

test/lib/unit/boost_channel_test.dart

@@ -22,10 +22,10 @@ void main() {
     response = null;
 
     test('sendEvent successfully', () async {
-      Map msg1 = Map();
+      Map msg1 = Map<dynamic,dynamic>();
       BoostChannel().sendEvent("name", msg1);
 
-      Map msg = Map();
+      Map msg = Map<dynamic,dynamic>();
       msg["name"] = "name";
       msg["arguments"] = msg1;
 
@@ -38,9 +38,9 @@ void main() {
 
 
     test('invokeMethod successfully', () async {
-      Map msg = {};
+      Map msg = <dynamic,dynamic>{};
       msg["test"] = "test";
-      BoostChannel().invokeMethod("__event__1", msg);
+      BoostChannel().invokeMethod<dynamic>("__event__1", msg);
 
 //       expect(e, isException);
 
@@ -52,9 +52,9 @@ void main() {
 
 
     test('invokeListMethod successfully', () async {
-      Map msg = {};
+      Map msg = <dynamic,dynamic>{};
       msg["test"] = "test";
-      var bb = await BoostChannel().invokeListMethod("__event__1", msg);
+      var bb = await BoostChannel().invokeListMethod<dynamic>("__event__1", msg);
 
       expect(
         log,
@@ -64,9 +64,9 @@ void main() {
 
 
     test('invokeMapMethod successfully', () async {
-      Map msg = {};
+      Map msg = <dynamic,dynamic>{};
       msg["test"] = "test";
-      BoostChannel().invokeMapMethod("__event__1", msg);
+      BoostChannel().invokeMapMethod<dynamic,dynamic>("__event__1", msg);
 
       expect(
         log,
@@ -75,9 +75,9 @@ void main() {
     });
 
     test('invokeMapMethod successfully', () async {
-      Map msg = {};
+      Map msg = <dynamic,dynamic>{};
       msg["test"] = "test";
-      BoostChannel().invokeMapMethod("__event__1", msg);
+      BoostChannel().invokeMapMethod<dynamic,dynamic>("__event__1", msg);
 
       expect(
         log,

test/lib/unit/boost_page_route_test.dart

@@ -49,8 +49,8 @@ void main() {
     testWidgets(
         'obtain BoostPageRoute through the `BoostPageRoute.of(context)` method',
         (WidgetTester tester) async {
-      var boostPageRoute;
-      var boostPageRouteFindByOfMethod;
+      dynamic boostPageRoute;
+      dynamic boostPageRouteFindByOfMethod;
 
       await tester.pumpWidget(
         MaterialApp(
@@ -61,7 +61,7 @@ void main() {
                 builder: (context) {
                   return FloatingActionButton(
                     onPressed: () {
-                      boostPageRouteFindByOfMethod = BoostPageRoute.of(context);
+                      boostPageRouteFindByOfMethod = BoostPageRoute.of<dynamic>(context);
                     },
                   );
                 },
@@ -83,12 +83,12 @@ void main() {
         'try to find BoostPageRoute through the `BoostPageRoute.of(context)` method, '
         'but it doesn\'t exist, the method should throw an Exception',
         (WidgetTester tester) async {
-      var contextCache;
+      dynamic contextCache;
 
       await tester.pumpWidget(
         MaterialApp(
           onGenerateRoute: (RouteSettings settings) {
-            return MaterialPageRoute(
+            return MaterialPageRoute<dynamic>(
               settings: settings,
               builder: (context) => Builder(
                 builder: (context) => FloatingActionButton(
@@ -103,14 +103,14 @@ void main() {
       );
       await tester.tap(find.byType(FloatingActionButton));
 
-      expect(() => BoostPageRoute.of(contextCache), throwsException);
+      expect(() => BoostPageRoute.of<dynamic>(contextCache), throwsException);
     });
 
     testWidgets(
         'obtain BoostPageRoute through the `BoostPageRoute.tryOf(context)` method',
         (WidgetTester tester) async {
-      var boostPageRoute;
-      var boostPageRouteFindByOfMethod;
+      dynamic boostPageRoute;
+      dynamic boostPageRouteFindByOfMethod;
 
       await tester.pumpWidget(
         MaterialApp(
@@ -122,7 +122,7 @@ void main() {
                   return FloatingActionButton(
                     onPressed: () {
                       boostPageRouteFindByOfMethod =
-                          BoostPageRoute.tryOf(context);
+                          BoostPageRoute.tryOf<dynamic>(context);
                     },
                   );
                 },
@@ -145,19 +145,19 @@ void main() {
       'try to find BoostPageRoute through the `BoostPageRoute.tryOf(context)` method, '
       'but it doesn\'t exist, the method should return null',
       (WidgetTester tester) async {
-    var boostPageRouteFindByOfMethod;
+        dynamic boostPageRouteFindByOfMethod;
 
     await tester.pumpWidget(
       MaterialApp(
         onGenerateRoute: (RouteSettings settings) {
-          return MaterialPageRoute(
+          return MaterialPageRoute<dynamic>(
             settings: settings,
             builder: (BuildContext context) => Builder(
               builder: (context) {
                 return FloatingActionButton(
                   onPressed: () {
                     boostPageRouteFindByOfMethod =
-                        BoostPageRoute.tryOf(context);
+                        BoostPageRoute.tryOf<dynamic>(context);
                   },
                 );
               },

test/lib/unit/container_coordinator_test.dart

@@ -20,12 +20,12 @@ class MockBoostChannel extends BoostChannel implements Mock {
   VoidCallback addEventListener(String name, EventListener listener) {
     _testEventListener = listener;
 
-    super.addEventListener(name, listener);
+    return super.addEventListener(name, listener);
   }
 
   VoidCallback addMethodHandler(MethodHandler handler) {
     _testHandler = handler;
-    super.addMethodHandler(handler);
+    return  super.addMethodHandler(handler);
   }
 }
 
@@ -39,9 +39,9 @@ void main() {
     MockBoostChannel boostChannel = MockBoostChannel();
     ContainerCoordinator(boostChannel);
 
-    final Map arguments = {};
+    final Map arguments =<dynamic,dynamic> {};
     arguments["pageName"] = "pageName";
-    arguments["params"] = {};
+    arguments["params"] = <dynamic,dynamic>{};
     arguments["uniqueId"] = "xxxxx";
 
     MethodCall call = MethodCall('didInitPageContainer', arguments);
@@ -97,7 +97,7 @@ void main() {
       expect(e, isNoSuchMethodError);
     }
 
-    Map arg = {'type': 'backPressedCallback'};
+    Map arg = <dynamic,dynamic>{'type': 'backPressedCallback'};
     try {
       boostChannel.testEventListener("lifecycle", arg);
     } catch (e) {
@@ -106,21 +106,21 @@ void main() {
 
 
 
-    Map arg2 = {'type': 'foreground'};
+    Map arg2 = <dynamic,dynamic>{'type': 'foreground'};
     try {
       boostChannel.testEventListener("lifecycle", arg2);
     } catch (e) {
       expect(e, isNoSuchMethodError);
     }
 
-    Map arg3 = {'type': 'background'};
+    Map arg3 = <dynamic,dynamic>{'type': 'background'};
     try {
       boostChannel.testEventListener("lifecycle", arg3);
     } catch (e) {
       expect(e, isNoSuchMethodError);
     }
 
-    Map arg4 = {'type': 'scheduleFrame'};
+    Map arg4 = <dynamic,dynamic>{'type': 'scheduleFrame'};
     try {
       boostChannel.testEventListener("lifecycle", arg4);
     } catch (e) {

test/lib/unit/flutter_boost_test.dart

@@ -34,13 +34,13 @@ void main() {
       expect(e, isNoSuchMethodError);
     }
     try {
-      FlutterBoost.singleton.closeCurrent(result: {}, exts: {});
+      FlutterBoost.singleton.closeCurrent(result: <String,dynamic>{}, exts: <String,dynamic>{});
     } catch (e) {
       expect(e, isNoSuchMethodError);
     }
 
     try {
-      FlutterBoost.singleton.closeByContext(null, result: {}, exts: {});
+      FlutterBoost.singleton.closeByContext(null, result: <String,dynamic>{}, exts: <String,dynamic>{});
     } catch (e) {
       expect(e, isNoSuchMethodError);
     }

test/lib/unit/page_widget_test.dart

@@ -72,7 +72,7 @@ void main() {
     );
     //open firt page
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("first", {}, "1000000");
+        .nativeContainerDidShow("first", <dynamic,dynamic>{}, "1000000");
 
     await tester.pump(const Duration(seconds: 1));
 
@@ -80,7 +80,7 @@ void main() {
 
     //open second page  firt(1000000)->second(2000000)
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("second", {}, "2000000");
+        .nativeContainerDidShow("second", <dynamic,dynamic>{}, "2000000");
 
     await tester.pump(const Duration(seconds: 1));
 
@@ -97,7 +97,7 @@ void main() {
 
     // second page ,but pageId is 2000001    firt(1000000)->second(2000001)
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("second", {}, "2000001");
+        .nativeContainerDidShow("second", <dynamic,dynamic>{}, "2000001");
 
     await tester.pump(const Duration(seconds: 1));
 
@@ -107,7 +107,7 @@ void main() {
 
     //reopen firt page   second(2000001)->firt(1000000)
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("first", {}, "1000000");
+        .nativeContainerDidShow("first",<dynamic,dynamic> {}, "1000000");
 
     await tester.pump(const Duration(seconds: 1));
 
@@ -117,7 +117,7 @@ void main() {
 
     // reopen second page and  pageId is 2000001    firt(1000000)->second(2000001)
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("second", {}, "2000001");
+        .nativeContainerDidShow("second", <dynamic,dynamic>{}, "2000001");
 
     await tester.pump(const Duration(seconds: 1));
 
@@ -135,7 +135,7 @@ void main() {
 
     // open  second(2000003)
     ContainerCoordinator.singleton
-        .nativeContainerDidShow("second", {}, "2000003");
+        .nativeContainerDidShow("second", <dynamic,dynamic>{}, "2000003");
 
     await tester.idle();
 

test/lib/unit/page_widgets.dart

@@ -30,7 +30,7 @@ class FirstRouteWidget extends StatelessWidget {
                   child: Text('Present second route'),
                   onPressed: () {
                     print("Present second page!");
-                    FlutterBoost.singleton.open("second",urlParams:{"present":true}).then((Map value) {
+                    FlutterBoost.singleton.open("second",urlParams:<dynamic,dynamic>{"present":true}).then((Map value) {
                       print(
                           "call me when page is finished. did recieve second route result $value");
                     });
@@ -78,7 +78,7 @@ class SecondRouteWidget extends StatelessWidget {
             BoostContainerSettings settings =
                 BoostContainer.of(context).settings;
             FlutterBoost.singleton.close(settings.uniqueId,
-                result: {"result": "data from second"});
+                result:<dynamic,dynamic>{"result": "data from second"});
           },
           child: Text('Go back with result!'),
         ),
@@ -172,7 +172,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("sample://nativePage", urlParams: {
+                      .open("sample://nativePage", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -189,7 +189,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("first", urlParams: {
+                      .open("first", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -206,7 +206,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("second", urlParams: {
+                      .open("second", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -223,7 +223,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("tab", urlParams: {
+                      .open("tab", urlParams: <dynamic,dynamic>{
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -240,7 +240,7 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                   ///后面的参数会在native的IPlatform.startActivity方法回调中拼接到url的query部分。
                   ///例如：sample://nativePage?aaa=bbb
                   onTap: () => FlutterBoost.singleton
-                      .open("sample://flutterPage", urlParams: {
+                      .open("sample://flutterPage", urlParams:<dynamic,dynamic> {
                     "query": {"aaa": "bbb"}
                   }),
                 ),
@@ -254,8 +254,8 @@ class _FlutterRouteWidgetState extends State<FlutterRouteWidget> {
                         style: TextStyle(fontSize: 22.0, color: Colors.black),
                       )),
                   onTap: () {
-                    Navigator.push(context,
-                        MaterialPageRoute(builder: (_) => PushWidget()));
+                    Navigator.push<dynamic>(context,
+                        MaterialPageRoute<dynamic>(builder: (_) => PushWidget()));
                   },
                 ),