尝试解决二次启动时文件读取问题

android/app/src/main/kotlin/com/lxh/battery_health/MainActivity.kt

@@ -4,6 +4,7 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.content.SharedPreferences
 import android.net.Uri
 import android.os.BatteryManager
 import android.os.Build
@@ -20,18 +21,17 @@ import java.io.BufferedReader
 import java.io.InputStreamReader
 
 class MainActivity : FlutterActivity() {
-    // ---------- 充电状态 ----------
     private val CHARGE_CHANNEL = "com.lxh.battery_health/charge"
     private val EVENT_CHANNEL = "com.lxh.battery_health/charge_events"
     private var eventSink: EventChannel.EventSink? = null
 
-    // ---------- SAF 相关 ----------
     private val SAF_CHANNEL = "com.lxh.battery_health/saf"
     private var safResult: MethodChannel.Result? = null
     private var safUri: Uri? = null
     private val FOLDER_PICKER_REQUEST = 1001
+    private val PREF_NAME = "battery_health_prefs"
+    private val KEY_SAF_URI = "saf_uri"
 
-    // ---------- 充电广播接收器 ----------
     private val chargeReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
             intent ?: return
@@ -42,6 +42,46 @@ class MainActivity : FlutterActivity() {
         }
     }
 
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        android.util.Log.d("BatteryHealth", "onCreate 开始")
+
+        try {
+            val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
+            val uriString = prefs.getString(KEY_SAF_URI, null)
+            android.util.Log.d("BatteryHealth", "SharedPreferences URI: $uriString")
+            if (uriString != null) {
+                safUri = Uri.parse(uriString)
+                android.util.Log.d("BatteryHealth", "恢复 SAF URI 成功: $safUri")
+            }
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "恢复 URI 异常: ${e.message}")
+        }
+        android.util.Log.d("BatteryHealth", "onCreate 结束，safUri = $safUri")
+    }
+
+    private fun saveUri(uri: Uri) {
+        try {
+            val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
+            prefs.edit().putString(KEY_SAF_URI, uri.toString()).apply()
+            android.util.Log.d("BatteryHealth", "保存 SAF URI: $uri")
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "保存 URI 失败: ${e.message}")
+        }
+    }
+
+    private fun restoreUri(uriString: String) {
+        try {
+            safUri = Uri.parse(uriString)
+            android.util.Log.d("BatteryHealth", "通过 MethodChannel 恢复 URI: $safUri")
+            // 同时保存到 SharedPreferences
+            val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
+            prefs.edit().putString(KEY_SAF_URI, uriString).apply()
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "restoreUri 失败: ${e.message}")
+        }
+    }
+
     private fun sendChargeState(isCharging: Boolean) {
         val chargeType = if (isCharging) {
             val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
@@ -66,7 +106,6 @@ class MainActivity : FlutterActivity() {
                 status == BatteryManager.BATTERY_STATUS_FULL
     }
 
-    // ---------- SAF 方法 ----------
     private fun openFolderPicker() {
         try {
             val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
@@ -100,7 +139,8 @@ class MainActivity : FlutterActivity() {
                     val takeFlags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
                     contentResolver.takePersistableUriPermission(uri, takeFlags)
                     safUri = uri
-                    android.util.Log.d("BatteryHealth", "SAF URI: $uri")
+                    saveUri(uri)
+                    android.util.Log.d("BatteryHealth", "SAF 授权成功 URI: $uri")
                     safResult?.success(uri.toString())
                 } catch (e: Exception) {
                     android.util.Log.e("BatteryHealth", "SAF 授权失败: ${e.message}")
@@ -118,9 +158,13 @@ class MainActivity : FlutterActivity() {
     }
 
     private fun listFiles(): List<String> {
+        android.util.Log.d("BatteryHealth", "listFiles 被调用，safUri = $safUri")
         val result = mutableListOf<String>()
         val docId = getTreeDocId()
-        if (docId == null || docId.isEmpty()) return result
+        if (docId == null || docId.isEmpty()) {
+            android.util.Log.e("BatteryHealth", "docId 为空")
+            return result
+        }
 
         try {
             val childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(safUri!!, docId)
@@ -134,7 +178,7 @@ class MainActivity : FlutterActivity() {
                 }
             }
         } catch (e: Exception) {
-            android.util.Log.e("BatteryHealth", "列出文件失败: ${e.message}")
+            android.util.Log.e("BatteryHealth", "列出文件失败: ${e.message}", e)
         }
         return result
     }
@@ -178,11 +222,9 @@ class MainActivity : FlutterActivity() {
         return fileUri?.let { readFile(it) }
     }
 
-    // ---------- Flutter 通道配置 ----------
     override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
 
-        // 充电状态通道
         MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHARGE_CHANNEL)
             .setMethodCallHandler { call, result ->
                 if (call.method == "getChargeState") {
@@ -205,10 +247,18 @@ class MainActivity : FlutterActivity() {
                 }
             }
 
-        // SAF 通道
         MethodChannel(flutterEngine.dartExecutor.binaryMessenger, SAF_CHANNEL)
             .setMethodCallHandler { call, result ->
                 when (call.method) {
+                    "restoreUri" -> {
+                        val uriString = call.argument<String>("uri")
+                        if (uriString != null) {
+                            restoreUri(uriString)
+                            result.success(true)
+                        } else {
+                            result.error("INVALID_ARGUMENT", "uri is required", null)
+                        }
+                    }
                     "selectFolder" -> {
                         safResult = result
                         openFolderPicker()
@@ -233,7 +283,6 @@ class MainActivity : FlutterActivity() {
                 }
             }
 
-        // 充电状态事件通道
         EventChannel(flutterEngine.dartExecutor.binaryMessenger, EVENT_CHANNEL)
             .setStreamHandler(
                 object : EventChannel.StreamHandler {

lib/pages/battery_health_page.dart

@@ -1,5 +1,5 @@
-import 'dart:io';
 import 'dart:async';
+import 'dart:io';
 import 'dart:developer' as dev;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -8,6 +8,7 @@ import 'package:sqflite/sqflite.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:path/path.dart' as path;
 import 'package:device_info_plus/device_info_plus.dart';
+//import 'package:shared_preferences/shared_preferences.dart';
 
 import '../models/device_matching.dart';
 import '../utils/charge_utils.dart';
@@ -84,8 +85,10 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
   }
 
   Future<Database> _initDatabase() async {
+    dev.log('🔵 _initDatabase 开始', name: 'BatteryHealth');
     Directory appDocDir = await getApplicationDocumentsDirectory();
     String dbPath = path.join(appDocDir.path, 'battery_health.db');
+    dev.log('🔵 数据库路径: $dbPath', name: 'BatteryHealth');
     return await openDatabase(
       dbPath,
       version: 2,
@@ -136,15 +139,18 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
 
   // ---------- 设备信息 ----------
   Future<void> _getDeviceInfo() async {
+    dev.log('🔵 _getDeviceInfo 开始', name: 'BatteryHealth');
     DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
     try {
       AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
       String model = androidInfo.model;
+      dev.log('🔵 设备型号: $model', name: 'BatteryHealth');
       setState(() {
         _deviceModel = DeviceMatching.getModelName(model);
         _designCap = DeviceMatching.getDesignCapacity(model);
       });
     } catch (e) {
+      dev.log('🔵 获取设备信息失败: $e', name: 'BatteryHealth');
       setState(() {
         _deviceModel = '魅族21 Pro (默认)';
         _designCap = 5050;
@@ -152,23 +158,25 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
     }
   }
 
-  // ---------- 扫描目录 (SAF 模式) ----------
+  // ---------- 扫描目录 (SAF) ----------
   Future<void> _scanAndUpdateDB() async {
-    // 检查 SAF 授权状态
+    dev.log('🔵 _scanAndUpdateDB 开始', name: 'BatteryHealth');
     _safState = await _safService.getPermissionState();
     if (_safState != SafPermissionState.authorized) {
-      _showSafAuthorizationDialog();
+      dev.log('🔵 _scanAndUpdateDB: 未授权', name: 'BatteryHealth');
       return;
     }
 
     try {
       final files = await _safService.listFiles();
+      dev.log('🔵 扫描文件列表: $files', name: 'BatteryHealth');
       RegExp filePattern = RegExp(r'mbattery_charger_log_(\d{4}_\d{2}_\d{2})$');
 
       for (String fileName in files) {
         Match? match = filePattern.firstMatch(fileName);
         if (match != null) {
           String dateStr = match.group(1)!.replaceAll('_', '-');
+          dev.log('🔵 处理文件: $fileName, 日期: $dateStr', name: 'BatteryHealth');
           try {
             List<String> lines = await _safService.readLogFile(fileName);
             if (lines.isEmpty) continue;
@@ -197,11 +205,14 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
             if (maxVolt == null || minVolt == null) continue;
 
             await _insertOrUpdate(dateStr, cap, maxVolt, minVolt);
-          } catch (_) {}
+            dev.log('🔵 插入数据库: $dateStr, cap=$cap', name: 'BatteryHealth');
+          } catch (e) {
+            dev.log('🔵 处理文件 $fileName 异常: $e', name: 'BatteryHealth');
+          }
         }
       }
     } catch (e) {
-      dev.log('[_scanAndUpdateDB] ❌ 扫描异常: $e', name: 'BatteryHealth');
+      dev.log('🔵 _scanAndUpdateDB 异常: $e', name: 'BatteryHealth');
     }
   }
 
@@ -211,7 +222,9 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
     String year = nowUtc.year.toString();
     String month = nowUtc.month.toString().padLeft(2, '0');
     String day = nowUtc.day.toString().padLeft(2, '0');
-    return 'mbattery_charger_log_${year}_${month}_$day';
+    String fileName = 'mbattery_charger_log_${year}_${month}_$day';
+    dev.log('🔵 getTodayFileName: $fileName', name: 'BatteryHealth');
+    return fileName;
   }
 
   // ---------- 时间戳工具方法 ----------
@@ -250,9 +263,10 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
 
   // ---------- SAF 授权引导 ----------
   void _showSafAuthorizationDialog() {
+    dev.log('🔵 _showSafAuthorizationDialog 被调用', name: 'BatteryHealth');
     if (!mounted) return;
 
-    showDialog(
+    showDialog<String>(
       context: context,
       barrierDismissible: false,
       builder: (context) => AlertDialog(
@@ -274,7 +288,8 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
         actions: [
           TextButton(
             onPressed: () {
-              Navigator.pop(context);
+              dev.log('🔵 用户取消授权', name: 'BatteryHealth');
+              Navigator.pop(context, 'cancel');
               setState(() {
                 _safState = SafPermissionState.denied;
               });
@@ -282,48 +297,44 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
             child: const Text('取消'),
           ),
           ElevatedButton(
-            onPressed: () async {
+            onPressed: () {
-              // 保存 context 引用
+              dev.log('🔵 用户点击选择文件夹', name: 'BatteryHealth');
-              final ctx = context;
+              Navigator.pop(context, 'select');
-
-              // 尝试关闭对话框
-              Navigator.of(ctx, rootNavigator: true).pop();
-
-              // 等待动画完成
-              await Future.delayed(const Duration(milliseconds: 200));
-
-              final result = await _safService.requestPermission();
-
-              if (!mounted) return;
-
-              if (result.success) {
-                setState(() {
-                  _safState = SafPermissionState.authorized;
-                });
-
-                // 🟢 兜底：在下一帧再次尝试关闭
-                WidgetsBinding.instance.addPostFrameCallback((_) {
-                  if (mounted) {
-                    Navigator.of(ctx, rootNavigator: true).pop();
-                  }
-                });
-
-                readBatteryCapacity();
-              } else {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(
-                    content: Text(result.errorMessage ?? '授权失败，请重试'),
-                    backgroundColor: Colors.red,
-                  ),
-                );
-                _showSafAuthorizationDialog();
-              }
             },
             child: const Text('选择文件夹'),
           ),
         ],
       ),
-    );
+    ).then((result) async {
+      dev.log('🔵 对话框关闭，result: $result', name: 'BatteryHealth');
+      if (result == 'select') {
+        dev.log('🔵 开始请求授权', name: 'BatteryHealth');
+        final authResult = await _safService.requestPermission();
+        dev.log(
+          '🔵 授权结果: success=${authResult.success}, state=${authResult.state}',
+          name: 'BatteryHealth',
+        );
+
+        if (!mounted) return;
+
+        if (authResult.success) {
+          dev.log('🔵 授权成功，调用 readBatteryCapacity', name: 'BatteryHealth');
+          setState(() {
+            _safState = SafPermissionState.authorized;
+          });
+          readBatteryCapacity();
+        } else {
+          dev.log('🔵 授权失败: ${authResult.errorMessage}', name: 'BatteryHealth');
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(
+              content: Text(authResult.errorMessage ?? '授权失败，请重试'),
+              backgroundColor: Colors.red,
+            ),
+          );
+          _showSafAuthorizationDialog();
+        }
+      }
+    });
   }
 
   // ---------- 核心：系统API定调 ----------
@@ -531,10 +542,9 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
       }
     }
 
-    // 检查 SAF 授权
     _safState = await _safService.getPermissionState();
     if (_safState != SafPermissionState.authorized) {
-      if (mounted) _showSafAuthorizationDialog();
+      dev.log('[_fetchChargeDataFromLog] 未授权，跳过', name: 'BatteryHealth');
       return;
     }
 
@@ -620,9 +630,17 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
 
   // ---------- 读取当前数据 ----------
   Future<void> readBatteryCapacity() async {
+    dev.log(
+      '🔵 ========== readBatteryCapacity 开始 ==========',
+      name: 'BatteryHealth',
+    );
+
     // 检查 SAF 授权
     _safState = await _safService.getPermissionState();
+    dev.log('🔵 SAF状态: $_safState', name: 'BatteryHealth');
+
     if (_safState != SafPermissionState.authorized) {
+      dev.log('🔵 未授权，弹窗', name: 'BatteryHealth');
       if (mounted) _showSafAuthorizationDialog();
       return;
     }
@@ -631,11 +649,16 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
     await _scanAndUpdateDB();
 
     final fileName = getTodayFileName();
+    dev.log('🔵 今日文件名: $fileName', name: 'BatteryHealth');
+
     final exists = await _safService.logFileExists(fileName);
+    dev.log('🔵 文件存在: $exists', name: 'BatteryHealth');
 
     if (!exists) {
+      dev.log('🔵 文件不存在，尝试从数据库读取', name: 'BatteryHealth');
       List<Map<String, dynamic>> recent = await _queryRecentData(1);
       if (recent.isNotEmpty) {
+        dev.log('🔵 数据库有数据: ${recent.first}', name: 'BatteryHealth');
         setState(() {
           _currentCap = recent.first['capacity'].toDouble();
           _maxVolt = recent.first['volt_max'] ?? 0;
@@ -644,6 +667,7 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
         });
         await _updateTrendChart();
       } else {
+        dev.log('🔵 数据库无数据', name: 'BatteryHealth');
         setState(() => _hasData = false);
       }
       if (_isCharging) _fetchChargeDataFromLog();
@@ -654,7 +678,9 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
 
     try {
       final lines = await _safService.readLogFile(fileName);
+      dev.log('🔵 读取到 ${lines.length} 行', name: 'BatteryHealth');
       if (lines.isEmpty) {
+        dev.log('🔵 文件为空', name: 'BatteryHealth');
         setState(() => _hasData = false);
         if (_isCharging) _fetchChargeDataFromLog();
         _chargeAnimationController.reset();
@@ -662,12 +688,23 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
         return;
       }
 
+      // 打印前几行
+      if (lines.isNotEmpty) {
+        dev.log('🔵 第一行: ${lines.first}', name: 'BatteryHealth');
+        if (lines.length > 1) {
+          dev.log('🔵 第二行: ${lines[1]}', name: 'BatteryHealth');
+        }
+      }
+
       if (_isCharging) _parseChargeDataFromLog(lines);
 
       List<String> validLines = lines
           .where((line) => line.contains('tbat='))
           .toList();
+      dev.log('🔵 有效行数 (含tbat): ${validLines.length}', name: 'BatteryHealth');
+
       if (validLines.isEmpty) {
+        dev.log('🔵 无有效数据行', name: 'BatteryHealth');
         setState(() => _hasData = false);
         _chargeAnimationController.reset();
         _updateChargeState();
@@ -675,6 +712,8 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
       }
 
       String lastLine = validLines.last;
+      dev.log('🔵 最后一行: $lastLine', name: 'BatteryHealth');
+
       RegExp capReg = RegExp(r'learned_cap=(\d+)');
       RegExp cycleReg = RegExp(r'cycle=(\d+)');
       RegExp tempReg = RegExp(r'tbat=(\d+)');
@@ -685,7 +724,13 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
       String? tempStr = tempReg.firstMatch(lastLine)?.group(1);
       String? voltStr = voltageReg.firstMatch(lastLine)?.group(1);
 
+      dev.log(
+        '🔵 capStr=$capStr, cycleStr=$cycleStr, tempStr=$tempStr, voltStr=$voltStr',
+        name: 'BatteryHealth',
+      );
+
       if (capStr == null) {
+        dev.log('🔵 未找到 learned_cap', name: 'BatteryHealth');
         setState(() => _hasData = false);
         _chargeAnimationController.reset();
         _updateChargeState();
@@ -697,6 +742,11 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
       double temp = double.parse(tempStr ?? '0');
       double volt = double.parse(voltStr ?? '0') / 1000000;
 
+      dev.log(
+        '🔵 解析结果: capMah=$capMah, cycle=$cycle, temp=$temp, volt=$volt',
+        name: 'BatteryHealth',
+      );
+
       List<double> temps = [];
       for (String line in validLines) {
         RegExpMatch? match = tempReg.firstMatch(line);
@@ -731,10 +781,20 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
         _hasData = true;
       });
 
+      dev.log(
+        '🔵 数据更新完成: _currentCap=$_currentCap, _cycleCount=$_cycleCount',
+        name: 'BatteryHealth',
+      );
+
       await _updateTrendChart();
       _chargeAnimationController.reset();
       _updateChargeState();
+      dev.log(
+        '🔵 ========== readBatteryCapacity 完成 ==========',
+        name: 'BatteryHealth',
+      );
     } catch (e) {
+      dev.log('🔵 readBatteryCapacity 异常: $e', name: 'BatteryHealth');
       setState(() => _hasData = false);
       _chargeAnimationController.reset();
       _updateChargeState();
@@ -752,6 +812,7 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
   @override
   void initState() {
     super.initState();
+    dev.log('🔵 ========== initState 开始 ==========', name: 'BatteryHealth');
 
     _chargeAnimationController = AnimationController(
       vsync: this,
@@ -786,18 +847,29 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
       }
     });
 
-    // 延迟初始化 SAF 并读取数据
     WidgetsBinding.instance.addPostFrameCallback((_) async {
+      dev.log('🔵 initState -> addPostFrameCallback 开始', name: 'BatteryHealth');
+
       await _safService.init();
+      dev.log(
+        '🔵 _safService.init() 完成，cachedUri: ${_safService.cachedUri}',
+        name: 'BatteryHealth',
+      );
+
       _safState = await _safService.getPermissionState();
+      dev.log('🔵 _safState: $_safState', name: 'BatteryHealth');
 
       if (_safState == SafPermissionState.unauthorized ||
           _safState == SafPermissionState.expired) {
+        dev.log('🔵 需要授权，弹窗', name: 'BatteryHealth');
         if (mounted) _showSafAuthorizationDialog();
       } else {
+        dev.log('🔵 已有授权，调用 readBatteryCapacity', name: 'BatteryHealth');
         readBatteryCapacity();
       }
     });
+
+    dev.log('🔵 ========== initState 结束 ==========', name: 'BatteryHealth');
   }
 
   @override

lib/services/saf_storage_service.dart

@@ -34,7 +34,7 @@ class SafStorageService {
     if (_cachedUri == null || _cachedUri!.isEmpty) {
       return SafPermissionState.unauthorized;
     }
-    // 🟢 简化：直接返回 authorized，相信本地缓存的 URI
+    // 🟢 直接返回 authorized，相信缓存
     return SafPermissionState.authorized;
   }