forked from lxm_flutter/FlutterUnit
81 lines
2.8 KiB
Dart
81 lines
2.8 KiB
Dart
import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/services.dart';
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import 'package:flutter_unit/app/res/cons.dart';
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import 'package:flutter_unit/app/res/sp.dart';
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import 'package:flutter_unit/blocs/global/global_state.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:sqflite/sqflite.dart';
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import 'package:path/path.dart' as path;
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/// create by 张风捷特烈 on 2020-03-04
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/// contact me by email 1981462002@qq.com
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/// 说明: 本地存储访问对象,用于读取配置数据，及初始化Database和SharedPreferences
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class AppStorage {
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SharedPreferences _sp;
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Database _database;
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Future<SharedPreferences> get sp async {
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_sp = _sp ?? await SharedPreferences.getInstance();
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return _sp;
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}
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Future<Database> get db async {
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_database = _database ?? await initDb();
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return _database;
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}
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// 初始化 App 固化的配置数据
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Future<GlobalState> initApp() async {
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SharedPreferences prefs = await sp;
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_database = await initDb();
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bool showBg = prefs.getBool(SP.showBackground) ?? true;
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int themeIndex = prefs.getInt(SP.themeColorIndex) ?? 4;
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int fontIndex = prefs.getInt(SP.fontFamily) ?? 1;
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int codeIndex = prefs.getInt(SP.codeStyleIndex) ?? 0;
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int itemStyleIndex = prefs.getInt(SP.itemStyleIndex) ?? 0;
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return GlobalState(
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showBackGround: showBg,
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themeColor: Cons.themeColorSupport.keys.toList()[themeIndex],
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fontFamily: Cons.fontFamilySupport[fontIndex],
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itemStyleIndex: itemStyleIndex,
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codeStyleIndex: codeIndex);
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}
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// 初始化数据库
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Future<Database> initDb() async {
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String databasesPath = await getDatabasesPath();
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String dbPath = path.join(databasesPath, "flutter.db");
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bool exists = await databaseExists(dbPath);
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const isPro = bool.fromEnvironment('dart.vm.product'); //是否release模式
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if (!isPro) {
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if (!exists) {
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await Directory(path.dirname(dbPath)).create(recursive: true);
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}
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ByteData data = await rootBundle.load(path.join("assets", "flutter.db"));
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List<int> bytes =
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data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
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await File(dbPath).writeAsBytes(bytes, flush: true);
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print("==== debug ===== assets ======拷贝完成====");
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return await openDatabase(dbPath, readOnly: false);
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}
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if (!exists) {
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await Directory(path.dirname(dbPath)).create(recursive: true);
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ByteData data = await rootBundle.load(path.join("assets", "flutter.db"));
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List<int> bytes =
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data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
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await File(dbPath).writeAsBytes(bytes, flush: true);
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print("==== release ===== assets ======拷贝完成====");
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} else {
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print("========= 数据库 ======已存在====");
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}
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return await openDatabase(dbPath, readOnly: false);
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}
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}
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