96 lines
3.3 KiB
Dart
96 lines
3.3 KiB
Dart
import 'package:shared_preferences/shared_preferences.dart';
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import 'dart:convert';
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/// 定位质量解析 + 缓存管理 工具类
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class LocationUtils {
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// ==================== 1. 缓存键常量（全局复用） ====================
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static const String kSavedPlotData = 'saved_plot_data';
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static const String kSavedGcjPathPoints = 'saved_gcj_path_points';
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static const String kSavedGcjOuterPoints = 'saved_gcj_outer_points';
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static const String kSavedMarkedPoints = 'saved_marked_points';
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static const String kSavedObstacleHoles = 'saved_obstacle_holes';
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static const String kSavedIsWorkAreaCompleted = 'saved_is_work_area_completed';
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// ==================== 2. 定位质量解析相关方法 ====================
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/// 解析定位质量值为可读字符串
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/// [locationValue] 定位质量编码（0/1/2/4/5）
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/// 返回：对应的中文描述
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static String parseLocationQuality(int locationValue) {
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switch (locationValue) {
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case 0:
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return '无效';
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case 1:
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return 'GPS 单点定位';
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case 2:
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return 'DGPS 伪距差分或 SBAS';
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case 4:
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return 'RTK 固定解';
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case 5:
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return 'RTK 浮点解';
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default:
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return '未知($locationValue)';
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}
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}
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static String parseControlMode(int value) {
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switch (value) {
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case 3:
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return '远程控制';
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default:
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return '本地控制';
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}
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}
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/// 校验定位质量是否有效
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static bool isLocationValid(int locationValue) {
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return locationValue != 0;
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}
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// ==================== 3. 缓存操作相关方法（可选扩展，按需添加） ====================
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/// 保存坐标点数组到 SharedPreferences（自动序列化）
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static Future<void> saveLatLngList(String key, List<dynamic> points) async {
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final prefs = await SharedPreferences.getInstance();
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// 将数组序列化为 JSON 字符串存储
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await prefs.setString(key, json.encode(points));
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}
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/// 读取坐标点数组（自动反序列化）
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static Future<List<dynamic>> getLatLngList(String key) async {
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final prefs = await SharedPreferences.getInstance();
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final jsonStr = prefs.getString(key);
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if (jsonStr == null || jsonStr.isEmpty) return [];
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try {
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return json.decode(jsonStr) as List<dynamic>;
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} catch (e) {
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print('读取缓存数组失败: $e, key=$key');
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return [];
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}
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}
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/// 清除指定缓存键
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static Future<void> clearCache(String key) async {
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final prefs = await SharedPreferences.getInstance();
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if (prefs.containsKey(key)) {
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await prefs.remove(key);
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}
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}
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/// 清除所有定位/地块相关缓存（仅清除本类定义的键）
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static Future<void> clearAllPlotCache() async {
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final prefs = await SharedPreferences.getInstance();
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// 批量清除本类定义的缓存键
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final cacheKeys = [kSavedPlotData, kSavedGcjPathPoints, kSavedGcjOuterPoints, kSavedMarkedPoints, kSavedObstacleHoles, kSavedIsWorkAreaCompleted];
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for (final key in cacheKeys) {
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if (prefs.containsKey(key)) {
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await prefs.remove(key);
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}
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}
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}
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// 在 LocationUtils 类中添加
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static Future<bool> getBool(String key, {bool defaultValue = false}) async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getBool(key) ?? defaultValue;
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}
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}
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