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untitled/lib/db/SQLite.dart

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+import 'dart:io';
+import 'package:path/path.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:sqflite/sqflite.dart';
+
+class SQLite {
+  static final SQLite _singleton = SQLite._internal();
+  factory SQLite() => _singleton;
+  SQLite._internal();
+  static Database _db;
+
+  Future<Database> get db async {
+    if (_db != null) {
+      return _db;
+    }
+    _db = await _initDB();
+    return _db;
+  }
+
+  Future<Database> _initDB() async {
+    Directory documentsDirectory = await getApplicationDocumentsDirectory();
+    String path = join(documentsDirectory.path, 'MiTaoShe');
+    print("documentsDirectory.path ============ : ${path}");
+    return await openDatabase(
+        path,
+        version: 1,
+        onCreate: _onCreate
+    );
+  }
+
+
+  Future _onCreate(Database db, int version) async {
+    /// 创建like 喜欢表
+     await db.execute("CREATE TABLE Like ("
+        "id integer primary key AUTOINCREMENT,"
+        "preview TEXT,"
+        "source TEXT,"
+        "title TEXT,"
+        "totals TEXT,"
+        "user TEXT"
+     ")");
+
+     /// 创建Menu 菜单 Principal(默认菜单) 表
+     await db.execute("CREATE TABLE Principal ("
+         "id integer primary key AUTOINCREMENT,"
+         "title TEXT,"
+         "page integer"
+     ")");
+
+     /// 创建Menu 菜单 Additional(可选菜单) 表
+     await db.execute("CREATE TABLE Additional ("
+         "id integer primary key AUTOINCREMENT,"
+         "title TEXT,"
+         "page integer"
+     ")");
+
+     /// 创建 单图收藏 表
+     await db.execute("CREATE TABLE SingleGraph ("
+         "id integer primary key AUTOINCREMENT,"
+         "src TEXT"
+     ")");
+  }
+
+}