增加null-safety，和引入说明

.vscode/settings.json

-{
-    "dart.flutterSdkPath": "/Users/qiaomeng/flutter_2.2.2",
-}
\ No newline at end of file

LICENSE

-Add your license here.

README.md

@@ -42,4 +42,13 @@ await UmengCommonSdk.onEvent(
                     'key1': '测试上传数据',
                   },
                 );
+```
+
+### 引入说明
+
+```
+umeng_common_sdk:
+    git:
+        url: 'git@git.xiaomanxiong.com:flutter-plugin/umeng_common_flutter.git'
+        ref: 'null-safety'
 ```
\ No newline at end of file

lib/umeng_common_sdk.dart

@@ -12,12 +12,12 @@ class UmengCommonSdk {
   /// [channel]             app的渠道,如：应用宝、小米、华为应用商店等
   /// [enableLog]           是否启用日志
   ///
-  static Future<bool> preInit({
-    @required String appKey,
-    @required String channel,
+  static Future<bool?> preInit({
+    required String appKey,
+    required String channel,
     bool enableLog = false,
   }) async {
-    final bool result = await _channel.invokeMethod('preInit', {
+    final bool? result = await _channel.invokeMethod('preInit', {
       'appKey': appKey,
       'channel': channel,
       'enableLog': enableLog,
@@ -34,11 +34,11 @@ class UmengCommonSdk {
   /// [mode]            页面采集模式，true:自动采集 false:手动采集
   /// [process]         是否支持子进程采集数据, true:支持  false:不支持
   ///
-  static Future<bool> init({
-    @required String appKey,
-    @required String channel,
+  static Future<bool?> init({
+    required String appKey,
+    required String channel,
     int deviceType = 1,
-    String pushSecret,
+    String? pushSecret,
     bool mode = true,
     bool process = true,
   }) async {
@@ -58,9 +58,9 @@ class UmengCommonSdk {
   /// [event]       事件标志
   /// [properties]  事件参数
   ///
-  static Future<bool> onEvent({
-    @required String event,
-    @required Map<String, dynamic> properties,
+  static Future<bool?> onEvent({
+    required String event,
+    required Map<String, dynamic> properties,
   }) async {
     return await _channel.invokeMethod('onEvent', {
       'eventId': event,
@@ -73,9 +73,9 @@ class UmengCommonSdk {
   /// [userId]            用户标识
   /// [provider]          账号来源。如果用户通过第三方账号登陆,微博，微信等
   ///
-  static Future<bool> onSignIn({
-    @required String userId,
-    String provider,
+  static Future<bool?> onSignIn({
+    required String userId,
+    String? provider,
   }) async {
     return await _channel.invokeMethod('onSignIn', {
       'userId': userId,
@@ -86,7 +86,7 @@ class UmengCommonSdk {
   ///
   /// 账号统计-退出登陆
   ///
-  static Future<bool> onSignOff() async {
+  static Future<bool?> onSignOff() async {
     return await _channel.invokeMethod('onSignOff');
   }
 
@@ -94,7 +94,7 @@ class UmengCommonSdk {
   /// 页面采集-打开
   /// [pageName]        采集页面的名称
   ///
-  static Future<bool> onPageStart({@required String pageName}) async {
+  static Future<bool?> onPageStart({required String pageName}) async {
     return await _channel.invokeMethod('onPageStart', {'pageName': pageName});
   }
 
@@ -102,7 +102,7 @@ class UmengCommonSdk {
   /// 页面采集关闭
   /// [pageName]        采集页面的名称
   ///
-  static Future<bool> onPageEnd({@required String pageName}) async {
+  static Future<bool?> onPageEnd({required String pageName}) async {
     return await _channel.invokeMethod('onPageEnd', {'pageName': pageName});
   }
 }

pubspec.yaml

@@ -4,7 +4,7 @@ version: 1.2.2
 homepage: https://www.umeng.com
 
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.10.0"
 
 dependencies:

test/umeng_common_sdk_test.dart

-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  const MethodChannel channel = MethodChannel('umeng_common_sdk');
-
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  setUp(() {
-    channel.setMockMethodCallHandler((MethodCall methodCall) async {
-      return '42';
-    });
-  });
-
-  tearDown(() {
-    channel.setMockMethodCallHandler(null);
-  });
-}