1.每次请求都更新meui

lib/util/net_util.dart

@@ -330,27 +330,26 @@ class NetUtil {
   //   return params;
   // }
 
+  static PackageInfo packageInfo;
+  static Map setting;
+  static IosDeviceInfo iosInfo;
+  static AndroidDeviceInfo androidInfo;
+  static String imei;
 
- static PackageInfo packageInfo;
- static Map setting;
- static IosDeviceInfo iosInfo;
- static AndroidDeviceInfo androidInfo;
- static String imei;
   /// 获取必须的请求参数(用于请求头部)
   static Future<Map<String, String>> _getMustHeadParams() async {
-
     Map<String, String> params = new HashMap<String, String>();
     // 应用信息
-    if(packageInfo==null){
+    if (packageInfo == null) {
       packageInfo = await PackageInfo.fromPlatform();
     }
     // 原生传的信息
-    if(setting==null){
+    if (setting == null) {
       setting = await NativeUtil.getSetting();
     }
 
     if (Platform.isIOS) {
-      if(iosInfo==null){
+      if (iosInfo == null) {
         iosInfo = await DeviceInfoPlugin().iosInfo;
       }
       // 设备
@@ -366,7 +365,7 @@ class NetUtil {
       // idfa
       params['idfa'] = iosInfo?.identifierForVendor?.toString();
     } else if (Platform.isAndroid) {
-      if(androidInfo==null){
+      if (androidInfo == null) {
         androidInfo = await DeviceInfoPlugin().androidInfo;
       }
       // 设备
@@ -413,12 +412,9 @@ class NetUtil {
     // 当前时间戳：秒
     params["time"] = TimeUtil.getNowTime();
 
-    if (imei==null) {
-       imei = await _getImei();
-       print("获取到udid"+(imei??""));
-    }else{
-       params['imei']=imei;
-    }
+    imei = await getImei();
+    print("获取到udid" + (imei ?? ""));
+    params['imei'] = imei;
 
     // 过滤空字段，过滤首尾空格
     Map<String, String> filters = Map<String, String>();
@@ -440,9 +436,9 @@ class NetUtil {
   }
 
   /// 获取Android imei
-  static Future<String> _getImei() async {
+  static Future<String> getImei() async {
     try {
-      return  await  FlutterAlibc.getUdid();
+      return await FlutterAlibc.getUdid();
     } catch (e, s) {
       Logger.error(e, s);
     }
@@ -558,7 +554,6 @@ class NetUtil {
       Logger.error('未知错误: ${e.toString()}');
     }
   }
-
 }
 
 /**