【修复】数据库初始化

@@ -16,7 +16,7 @@ import '../log/logger.dart';
 class AutoTrackQueue {
   static final AutoTrackQueue instance = AutoTrackQueue._();
 
-  late Database database;
+  Database? database;
   Future<void> _lastTask = Future.value();
 
   void post(Future<void> Function() task) {
@@ -29,10 +29,16 @@ class AutoTrackQueue {
 
     //异步任务
     post(() async {
-      database = await openTrackDatabase();
+      await _checkInitDataBase();
     });
   }
 
+  Future<void> _checkInitDataBase() async{
+    if (database != null) {
+      database = await openTrackDatabase();
+    }
+  }
+
   Future<Database> openTrackDatabase() async {
     final databasePath = await getDatabasesPath();
     final pathString = path.join(databasePath, 'track.db');
@@ -55,9 +61,9 @@ class AutoTrackQueue {
   final httpClient = HttpClient();
 
   void appendQueue(TrackModel model) {
-    if (database == null) return;
     post(() async {
-      await database.insert(
+      await _checkInitDataBase();
+      await database!.insert(
           "track",
           Track(event: jsonEncode(model.toMap()), date: DateTime.now())
               .toMap());
@@ -82,6 +88,7 @@ class AutoTrackQueue {
   Future<void> flush() async {
     try {
       AutoTrackLogger.getInstance().debug("@@@start flush");
+      await _checkInitDataBase();
 
       if (database == null) {
         AutoTrackLogger.getInstance().debug('数据库未初始化，跳过 flush');
@@ -90,7 +97,7 @@ class AutoTrackQueue {
 
       final List<TrackModel> uploadList = [];
 
-      List<Map<String, dynamic>> events = await database.query("track",
+      List<Map<String, dynamic>> events = await database!.query("track",
           columns: ["id", "event", "date"], limit: 100);
       if (events.isEmpty) {
         AutoTrackLogger.getInstance().debug("@@@events is empty");
@@ -251,7 +258,7 @@ class AutoTrackQueue {
               } else {
                 //批量删除
                 for (var event in events) {
-                  await database.delete("track",
+                  await database!.delete("track",
                       where: "id = ?", whereArgs: [event['id']]);
                 }
               }