背景色优化

android/app/build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 
 android {
     namespace = "com.lxh.battery_health"
-    compileSdk = flutter.compileSdkVersion
+    compileSdk = 34
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
@@ -21,38 +21,39 @@ android {
     defaultConfig {
         applicationId = "com.lxh.battery_health"
         minSdk = flutter.minSdkVersion
-        targetSdk = flutter.targetSdkVersion
+        targetSdk = 34
         versionCode = flutter.versionCode
         versionName = flutter.versionName
         multiDexEnabled = true
     }
 
     signingConfigs {
+        // 如果没有正式签名，可以用 debug 签名代替（测试用）
+        // 正式发布时请替换为自己的密钥
+        getByName("debug") {
+            // debug 签名已经存在，无需额外配置
+        }
         create("release") {
-            // 这里配置你正式发布的签名
-            // 如果还没有正式签名，debug 可以用 debug 签名替代
-            keyAlias = "your_key_alias"
-            keyPassword = "your_key_password"
-            storeFile = file("your_keystore.jks")
-            storePassword = "your_store_password"
+            // 如果有正式签名，在这里配置
+            // keyAlias = "..."
+            // keyPassword = "..."
+            // storeFile = file("...")
+            // storePassword = "..."
         }
     }
 
-    signingConfigs {
-        // 如果没有正式签名，可以暂时用 debug 签名
-        // 正式发布时再替换
-    }
-
     buildTypes {
         debug {
+            // 🟢 关键：debug 版本包名加 .dev 后缀
             applicationIdSuffix = ".dev"
             signingConfig = signingConfigs.getByName("debug")
+            isDebuggable = true
+            isMinifyEnabled = false
+            isShrinkResources = false
         }
-
         release {
-            applicationIdSuffix = ""  // 保持原包名
-            // 🟢 如果还没有正式签名，先用 debug 签名替代
-            signingConfig = signingConfigs.getByName("debug")
+            // release 版本不加后缀，保持原包名
+            signingConfig = signingConfigs.getByName("debug") // 若没有正式签名，先用 debug 签名
             isMinifyEnabled = true
             isShrinkResources = true
             proguardFiles(
@@ -61,9 +62,6 @@ android {
             )
         }
     }
-
-    // 如果有 productFlavors，可以在这里配置
-    // 如果没有，忽略即可
 }
 
 flutter {
@@ -71,6 +69,5 @@ flutter {
 }
 
 dependencies {
-    // 如果项目中有其他依赖，添加在这里
-    // 注意：sqflite、permission_handler 等 Flutter 插件会自动包含
+    // 无需额外添加 Activity KTX，因为已改用 startActivityForResult
 }

android/app/src/main/AndroidManifest.xml

@@ -5,13 +5,15 @@
     android:label="@string/app_name"
     android:name="${applicationName}"
     android:icon="@drawable/logo"
-        android:requestLegacyExternalStorage="true">
+    android:requestLegacyExternalStorage="true"
+    android:theme="@style/LaunchTheme">   <!-- 全局先用 LaunchTheme -->
+
     <activity
         android:name=".MainActivity"
         android:exported="true"
         android:launchMode="singleTop"
         android:taskAffinity=""
-            android:theme="@style/LaunchTheme"
+        android:theme="@style/AppTheme"   
         android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
         android:hardwareAccelerated="true"
         android:windowSoftInputMode="adjustResize">

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

@@ -1,96 +0,0 @@
-package com.lxh.battery_health
-
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.content.IntentFilter
-import android.os.BatteryManager
-import android.os.Bundle
-import androidx.annotation.NonNull
-import io.flutter.embedding.android.FlutterActivity
-import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugin.common.EventChannel
-import io.flutter.plugin.common.MethodChannel
-
-class MainActivity : FlutterActivity() {
-    private val CHANNEL = "com.lxh.battery_health/charge"
-    private val EVENT_CHANNEL = "com.lxh.battery_health/charge_events"
-    private var eventSink: EventChannel.EventSink? = null
-
-    private val chargeReceiver = object : BroadcastReceiver() {
-        override fun onReceive(context: Context?, intent: Intent?) {
-            intent ?: return
-            when (intent.action) {
-                Intent.ACTION_POWER_CONNECTED -> sendChargeState(true)
-                Intent.ACTION_POWER_DISCONNECTED -> sendChargeState(false)
-            }
-        }
-    }
-
-    private fun sendChargeState(isCharging: Boolean) {
-        val chargeType = if (isCharging) {
-            val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
-            val plug = batteryIntent?.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) ?: -1
-            android.util.Log.d("BatteryHealth", "plug value: $plug, isCharging: $isCharging")
-            when (plug) {
-                BatteryManager.BATTERY_PLUGGED_AC -> "AC"
-                BatteryManager.BATTERY_PLUGGED_USB -> "USB"
-                BatteryManager.BATTERY_PLUGGED_WIRELESS -> "WIRELESS" // 🟢 关键修复
-                else -> "UNKNOWN"
-            }
-        } else {
-            "NONE"
-        }
-        eventSink?.success(mapOf("isCharging" to isCharging, "chargeType" to chargeType))
-    }
-
-    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
-        super.configureFlutterEngine(flutterEngine)
-
-        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
-            if (call.method == "getChargeState") {
-                val isCharging = getBatteryStatus()
-                val chargeType = if (isCharging) {
-                    val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
-                    val plug = batteryIntent?.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) ?: -1
-                    when (plug) {
-                        BatteryManager.BATTERY_PLUGGED_AC -> "AC"
-                        BatteryManager.BATTERY_PLUGGED_USB -> "USB"
-                        BatteryManager.BATTERY_PLUGGED_WIRELESS -> "WIRELESS" // 🟢 关键修复
-                        else -> "UNKNOWN"
-                    }
-                } else {
-                    "NONE"
-                }
-                result.success(mapOf("isCharging" to isCharging, "chargeType" to chargeType))
-            } else {
-                result.notImplemented()
-            }
-        }
-
-        EventChannel(flutterEngine.dartExecutor.binaryMessenger, EVENT_CHANNEL).setStreamHandler(
-            object : EventChannel.StreamHandler {
-                override fun onListen(arguments: Any?, events: EventChannel.EventSink?) {
-                    eventSink = events
-                    val filter = IntentFilter().apply {
-                        addAction(Intent.ACTION_POWER_CONNECTED)
-                        addAction(Intent.ACTION_POWER_DISCONNECTED)
-                    }
-                    registerReceiver(chargeReceiver, filter)
-                }
-
-                override fun onCancel(arguments: Any?) {
-                    eventSink = null
-                    unregisterReceiver(chargeReceiver)
-                }
-            }
-        )
-    }
-
-    private fun getBatteryStatus(): Boolean {
-        val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
-        val status = batteryIntent?.getIntExtra(BatteryManager.EXTRA_STATUS, -1) ?: -1
-        return status == BatteryManager.BATTERY_STATUS_CHARGING ||
-                status == BatteryManager.BATTERY_STATUS_FULL
-    }
-}

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

@@ -0,0 +1,305 @@
+package com.lxh.battery_health
+
+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
+import android.os.Bundle
+import android.provider.DocumentsContract
+import android.provider.OpenableColumns
+import androidx.activity.ComponentActivity
+import androidx.annotation.NonNull
+import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MethodChannel
+import java.io.BufferedReader
+import java.io.InputStreamReader
+
+class MainActivity : FlutterActivity() {
+    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
+
+    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"
+
+    private val chargeReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context?, intent: Intent?) {
+            intent ?: return
+            when (intent.action) {
+                Intent.ACTION_POWER_CONNECTED -> sendChargeState(true)
+                Intent.ACTION_POWER_DISCONNECTED -> sendChargeState(false)
+            }
+        }
+    }
+
+    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))
+            val plug = batteryIntent?.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) ?: -1
+            android.util.Log.d("BatteryHealth", "plug value: $plug, isCharging: $isCharging")
+            when (plug) {
+                BatteryManager.BATTERY_PLUGGED_AC -> "AC"
+                BatteryManager.BATTERY_PLUGGED_USB -> "USB"
+                BatteryManager.BATTERY_PLUGGED_WIRELESS -> "WIRELESS"
+                else -> "UNKNOWN"
+            }
+        } else {
+            "NONE"
+        }
+        eventSink?.success(mapOf("isCharging" to isCharging, "chargeType" to chargeType))
+    }
+
+    private fun getBatteryStatus(): Boolean {
+        val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
+        val status = batteryIntent?.getIntExtra(BatteryManager.EXTRA_STATUS, -1) ?: -1
+        return status == BatteryManager.BATTERY_STATUS_CHARGING ||
+                status == BatteryManager.BATTERY_STATUS_FULL
+    }
+
+    private fun openFolderPicker() {
+        try {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                    try {
+                        val downloadsUri = DocumentsContract.buildDocumentUri(
+                            "com.android.externalstorage.documents",
+                            "primary:Downloads"
+                        )
+                        putExtra(DocumentsContract.EXTRA_INITIAL_URI, downloadsUri)
+                    } catch (e: Exception) {
+                        // 忽略
+                    }
+                }
+                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+            }
+            startActivityForResult(intent, FOLDER_PICKER_REQUEST)
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "打开文件夹选择器失败: ${e.message}")
+            safResult?.error("SELECT_FOLDER_FAILED", e.message, null)
+            safResult = null
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (requestCode == FOLDER_PICKER_REQUEST && resultCode == ComponentActivity.RESULT_OK) {
+            val uri = data?.data
+            if (uri != null) {
+                try {
+                    val takeFlags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    contentResolver.takePersistableUriPermission(uri, takeFlags)
+                    safUri = 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}")
+                    safResult?.error("SAF_FAILED", e.message, null)
+                }
+            } else {
+                safResult?.success(null)
+            }
+            safResult = null
+        }
+    }
+
+    private fun getTreeDocId(): String? {
+        return safUri?.let { DocumentsContract.getTreeDocumentId(it) }
+    }
+
+    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()) {
+            android.util.Log.e("BatteryHealth", "docId 为空")
+            return result
+        }
+
+        try {
+            val childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(safUri!!, docId)
+            contentResolver.query(childrenUri, null, null, null, null)?.use { cursor ->
+                val nameIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+                while (cursor.moveToNext()) {
+                    val name = cursor.getString(nameIndex)
+                    if (name != null) {
+                        result.add(name)
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "列出文件失败: ${e.message}", e)
+        }
+        return result
+    }
+
+    private fun getFileUri(fileName: String): Uri? {
+        val docId = getTreeDocId() ?: return null
+        try {
+            val childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(safUri!!, docId)
+            contentResolver.query(childrenUri, null, null, null, null)?.use { cursor ->
+                val nameIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+                val idIndex = cursor.getColumnIndex(DocumentsContract.Document.COLUMN_DOCUMENT_ID)
+                while (cursor.moveToNext()) {
+                    val name = cursor.getString(nameIndex)
+                    if (name == fileName) {
+                        val fileDocId = cursor.getString(idIndex)
+                        return DocumentsContract.buildDocumentUriUsingTree(safUri!!, fileDocId)
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "获取文件URI失败: ${e.message}")
+        }
+        return null
+    }
+
+    private fun readFile(uri: Uri): String? {
+        return try {
+            contentResolver.openInputStream(uri)?.use { inputStream ->
+                BufferedReader(InputStreamReader(inputStream)).use { reader ->
+                    reader.readText()
+                }
+            }
+        } catch (e: Exception) {
+            android.util.Log.e("BatteryHealth", "读取文件失败: ${e.message}")
+            null
+        }
+    }
+
+    private fun readLogFile(fileName: String): String? {
+        val fileUri = getFileUri(fileName)
+        return fileUri?.let { readFile(it) }
+    }
+
+    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
+        super.configureFlutterEngine(flutterEngine)
+
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHARGE_CHANNEL)
+            .setMethodCallHandler { call, result ->
+                if (call.method == "getChargeState") {
+                    val isCharging = getBatteryStatus()
+                    val chargeType = if (isCharging) {
+                        val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
+                        val plug = batteryIntent?.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) ?: -1
+                        when (plug) {
+                            BatteryManager.BATTERY_PLUGGED_AC -> "AC"
+                            BatteryManager.BATTERY_PLUGGED_USB -> "USB"
+                            BatteryManager.BATTERY_PLUGGED_WIRELESS -> "WIRELESS"
+                            else -> "UNKNOWN"
+                        }
+                    } else {
+                        "NONE"
+                    }
+                    result.success(mapOf("isCharging" to isCharging, "chargeType" to chargeType))
+                } else {
+                    result.notImplemented()
+                }
+            }
+
+        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()
+                    }
+                    "readLogFile" -> {
+                        val fileName = call.argument<String>("fileName")
+                        if (fileName != null) {
+                            val content = readLogFile(fileName)
+                            result.success(content)
+                        } else {
+                            result.error("INVALID_ARGUMENT", "fileName is required", null)
+                        }
+                    }
+                    "listFiles" -> {
+                        val files = listFiles()
+                        result.success(files)
+                    }
+                    "getUri" -> {
+                        result.success(safUri?.toString())
+                    }
+                    else -> result.notImplemented()
+                }
+            }
+
+        EventChannel(flutterEngine.dartExecutor.binaryMessenger, EVENT_CHANNEL)
+            .setStreamHandler(
+                object : EventChannel.StreamHandler {
+                    override fun onListen(arguments: Any?, events: EventChannel.EventSink?) {
+                        eventSink = events
+                        val filter = IntentFilter().apply {
+                            addAction(Intent.ACTION_POWER_CONNECTED)
+                            addAction(Intent.ACTION_POWER_DISCONNECTED)
+                        }
+                        registerReceiver(chargeReceiver, filter)
+                    }
+
+                    override fun onCancel(arguments: Any?) {
+                        eventSink = null
+                        unregisterReceiver(chargeReceiver)
+                    }
+                }
+            )
+    }
+}

android/app/src/main/res/values/styles.xml

@@ -1,18 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             the Flutter engine draws its first frame -->
-        <item name="android:windowBackground">@drawable/launch_background</item>
-    </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <item name="android:windowBackground">?android:colorBackground</item>
+    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
+        <!-- 状态栏背景白色 -->
+        <item name="android:statusBarColor">@android:color/white</item>
+        <!-- 状态栏图标亮色（深色图标） -->
+        <item name="android:windowLightStatusBar">true</item>
     </style>
 </resources>

android/gradle.properties

@@ -1,3 +1,7 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true
+# This builtInKotlin flag was added automatically by Flutter migrator
+android.builtInKotlin=false
+# This newDsl flag was added automatically by Flutter migrator
+android.newDsl=false

lib/main.dart

@@ -20,7 +20,9 @@ class MyApp extends StatelessWidget {
       title: '电池健康度',
       theme: ThemeData(
         fontFamily: 'HarmonyOS_Sans_SC',
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: const Color.fromARGB(255, 255, 255, 255),
+        ),
         useMaterial3: true,
       ),
       home: const BatteryHealthPage(),

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;
               });
@@ -282,32 +297,44 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
             child: const Text('取消'),
           ),
           ElevatedButton(
-            onPressed: () async {
-              final ctx = context;
-              Navigator.pop(ctx);
-              final result = await _safService.requestPermission();
-              if (result.success) {
+            onPressed: () {
+              dev.log('🔵 用户点击选择文件夹', name: 'BatteryHealth');
+              Navigator.pop(context, 'select');
+            },
+            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 {
-                if (!mounted) return;
-                ScaffoldMessenger.of(ctx).showSnackBar(
+          dev.log('🔵 授权失败: ${authResult.errorMessage}', name: 'BatteryHealth');
+          ScaffoldMessenger.of(context).showSnackBar(
             SnackBar(
-                    content: Text(result.errorMessage ?? '授权失败，请重试'),
+              content: Text(authResult.errorMessage ?? '授权失败，请重试'),
               backgroundColor: Colors.red,
             ),
           );
           _showSafAuthorizationDialog();
         }
-            },
-            child: const Text('选择文件夹'), // 🟢 加这行
-          ),
-        ],
-      ),
-    );
+      }
+    });
   }
 
   // ---------- 核心：系统API定调 ----------
@@ -515,10 +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;
     }
 
@@ -604,9 +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;
     }
@@ -615,11 +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;
@@ -628,6 +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();
@@ -638,7 +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();
@@ -646,12 +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();
@@ -659,6 +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+)');
@@ -669,7 +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();
@@ -681,6 +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);
@@ -715,10 +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();
@@ -736,6 +812,7 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
   @override
   void initState() {
     super.initState();
+    dev.log('🔵 ========== initState 开始 ==========', name: 'BatteryHealth');
 
     _chargeAnimationController = AnimationController(
       vsync: this,
@@ -770,17 +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
@@ -796,11 +885,17 @@ class _BatteryHealthPageState extends State<BatteryHealthPage>
   @override
   Widget build(BuildContext context) {
     return AnnotatedRegion<SystemUiOverlayStyle>(
-      value: SystemUiOverlayStyle.dark,
+      value: SystemUiOverlayStyle(
+        statusBarColor: Colors.white,
+        statusBarIconBrightness: Brightness.dark,
+        statusBarBrightness: Brightness.dark,
+      ),
       child: Scaffold(
+        backgroundColor: Colors.white, // 🟢 页面背景色与 AppBar 统一
         appBar: AppBar(
-          backgroundColor: const Color.fromARGB(0, 255, 255, 255),
-          elevation: 0,
+          backgroundColor: Colors.white,
+          elevation: 0, // 🟢 去掉阴影
+          scrolledUnderElevation: 0, // 🟢 滚动时也不出现阴影
           title: const Text(
             '电池健康度',
             style: TextStyle(

lib/services/saf_storage_service.dart

@@ -1,65 +1,63 @@
-import 'dart:io';
 import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'package:file_picker/file_picker.dart';
 import '../models/saf_permission_state.dart';
 
-/// 使用 file_picker 实现文件夹访问
+/// SAF 存储服务
+/// 负责管理通过 SAF 授权的文件夹访问
 class SafStorageService {
   static final SafStorageService _instance = SafStorageService._internal();
   factory SafStorageService() => _instance;
   SafStorageService._internal();
 
-  static const String _prefKeySafPath = 'saf_storage_path';
-  String? _cachedPath;
+  static const MethodChannel _channel = MethodChannel(
+    'com.lxh.battery_health/saf',
+  );
+  static const String _prefKeySafUri = 'saf_storage_uri';
+  String? _cachedUri;
 
+  /// 初始化，从 SharedPreferences 恢复 URI
   Future<void> init() async {
+    try {
       final prefs = await SharedPreferences.getInstance();
-    _cachedPath = prefs.getString(_prefKeySafPath);
+      _cachedUri = prefs.getString(_prefKeySafUri);
       if (kDebugMode) {
-      print('[SAF] 初始化，缓存路径: $_cachedPath');
+        print('[SAF] 初始化，缓存 URI: $_cachedUri');
+      }
+    } catch (e) {
+      if (kDebugMode) {
+        print('[SAF] 初始化失败: $e');
+      }
+      _cachedUri = null;
     }
   }
 
+  /// 获取当前授权状态（简化版，直接根据缓存判断）
   Future<SafPermissionState> getPermissionState() async {
-    if (_cachedPath == null || _cachedPath!.isEmpty) {
+    if (_cachedUri == null || _cachedUri!.isEmpty) {
       return SafPermissionState.unauthorized;
     }
-    try {
-      final dir = Directory(_cachedPath!);
-      if (!await dir.exists()) {
-        _clearCache();
-        return SafPermissionState.expired;
-      }
+    // 直接返回 authorized，相信缓存
     return SafPermissionState.authorized;
-    } catch (e) {
-      _clearCache();
-      return SafPermissionState.expired;
-    }
   }
 
+  /// 请求 SAF 授权（引导用户选择文件夹）
   Future<SafAuthorizationResult> requestPermission() async {
     try {
-      // 使用 file_picker 选择文件夹
-      String? selectedPath = await FilePicker.platform.getDirectoryPath();
+      final String? uriString = await _channel.invokeMethod('selectFolder');
 
-      if (selectedPath == null || selectedPath.isEmpty) {
+      if (uriString == null || uriString.isEmpty) {
         return SafAuthorizationResult.denied();
       }
 
-      // 验证路径是否包含 mbattery_charger（可选，提高容错）
-      if (!selectedPath.contains('mbattery_charger')) {
-        return SafAuthorizationResult.error('请选择 mbattery_charger 文件夹');
-      }
-
-      _cachedPath = selectedPath;
-      await _savePath(selectedPath);
+      _cachedUri = uriString;
+      await _saveUri(uriString);
 
       if (kDebugMode) {
-        print('[SAF] 授权成功，路径: $selectedPath');
+        print('[SAF] 授权成功，URI: $uriString');
       }
 
-      return SafAuthorizationResult.success(selectedPath);
+      return SafAuthorizationResult.success(uriString);
     } catch (e) {
       if (kDebugMode) {
         print('[SAF] 授权失败: $e');
@@ -68,24 +66,63 @@ class SafStorageService {
     }
   }
 
+  /// 🟢 将 URI 传递给 Kotlin 端（用于恢复 safUri）
+  Future<bool> restoreUri() async {
+    if (_cachedUri == null || _cachedUri!.isEmpty) {
+      if (kDebugMode) {
+        print('[SAF] restoreUri: 缓存 URI 为空');
+      }
+      return false;
+    }
+    try {
+      final bool? result = await _channel.invokeMethod('restoreUri', {
+        'uri': _cachedUri,
+      });
+      if (result == true) {
+        if (kDebugMode) {
+          print('[SAF] restoreUri 成功: $_cachedUri');
+        }
+        return true;
+      } else {
+        if (kDebugMode) {
+          print('[SAF] restoreUri 失败: 返回 false');
+        }
+        return false;
+      }
+    } catch (e) {
+      if (kDebugMode) {
+        print('[SAF] restoreUri 异常: $e');
+      }
+      return false;
+    }
+  }
+
+  /// 检查指定日期的日志文件是否存在
   Future<bool> logFileExists(String fileName) async {
     final state = await getPermissionState();
     if (state != SafPermissionState.authorized) return false;
     try {
-      final file = File('${_cachedPath!}/$fileName');
-      return await file.exists();
+      final files = await listFiles();
+      return files.contains(fileName);
     } catch (e) {
       return false;
     }
   }
 
+  /// 读取日志文件内容（返回行列表）
   Future<List<String>> readLogFile(String fileName) async {
+    // 🟢 先尝试恢复 URI
+    await restoreUri();
+
     final state = await getPermissionState();
     if (state != SafPermissionState.authorized) return [];
+
     try {
-      final file = File('${_cachedPath!}/$fileName');
-      if (!await file.exists()) return [];
-      return await file.readAsLines();
+      final String? content = await _channel.invokeMethod('readLogFile', {
+        'fileName': fileName,
+      });
+      if (content == null || content.isEmpty) return [];
+      return content.split('\n');
     } catch (e) {
       if (kDebugMode) {
         print('[SAF] 读取文件失败: $e');
@@ -94,17 +131,20 @@ class SafStorageService {
     }
   }
 
+  /// 获取文件夹中的文件列表
   Future<List<String>> listFiles() async {
+    // 🟢 先尝试恢复 URI
+    await restoreUri();
+
     final state = await getPermissionState();
     if (state != SafPermissionState.authorized) return [];
+
     try {
-      final dir = Directory(_cachedPath!);
-      if (!await dir.exists()) return [];
-      final entities = await dir.list().toList();
-      return entities
-          .where((e) => e is File)
-          .map((e) => e.path.split(Platform.pathSeparator).last)
-          .toList();
+      final result = await _channel.invokeMethod('listFiles');
+      if (result is List) {
+        return result.cast<String>();
+      }
+      return [];
     } catch (e) {
       if (kDebugMode) {
         print('[SAF] 列出文件失败: $e');
@@ -113,24 +153,40 @@ class SafStorageService {
     }
   }
 
+  /// 验证授权是否有效（简化版）
   Future<bool> validatePermission() async {
     final state = await getPermissionState();
     return state == SafPermissionState.authorized;
   }
 
+  /// 清除缓存
   void _clearCache() {
-    _cachedPath = null;
-    _savePath(null);
+    _cachedUri = null;
+    _saveUri(null);
   }
 
-  Future<void> _savePath(String? path) async {
+  /// 保存 URI 到 SharedPreferences
+  Future<void> _saveUri(String? uri) async {
+    try {
       final prefs = await SharedPreferences.getInstance();
-    if (path != null && path.isNotEmpty) {
-      await prefs.setString(_prefKeySafPath, path);
+      if (uri != null && uri.isNotEmpty) {
+        await prefs.setString(_prefKeySafUri, uri);
+        if (kDebugMode) {
+          print('[SAF] 保存 URI 成功: $uri');
+        }
       } else {
-      await prefs.remove(_prefKeySafPath);
+        await prefs.remove(_prefKeySafUri);
+        if (kDebugMode) {
+          print('[SAF] 清除 URI');
+        }
+      }
+    } catch (e) {
+      if (kDebugMode) {
+        print('[SAF] 保存 URI 失败: $e');
+      }
     }
   }
 
-  String? get cachedPath => _cachedPath;
+  /// 获取缓存的 URI（用于调试）
+  String? get cachedUri => _cachedUri;
 }

pubspec.lock

@@ -113,14 +113,6 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "7.0.1"
-  file_picker:
-    dependency: "direct main"
-    description:
-      name: file_picker
-      sha256: "1bbf65dd997458a08b531042ec3794112a6c39c07c37ff22113d2e7e4f81d4e4"
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "6.2.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -134,14 +126,6 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "5.0.0"
-  flutter_plugin_android_lifecycle:
-    dependency: transitive
-    description:
-      name: flutter_plugin_android_lifecycle
-      sha256: "3854fe5e3bff0b113c658f260b90c95dea17c92db0f2addeac2e343dd9969785"
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "2.0.35"
   flutter_svg:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.3.0-dev.2
+version: 1.4.0
 
 environment:
   sdk: ^3.9.2
@@ -38,7 +38,7 @@ dependencies:
   path: ^1.9.0
   flutter_svg: ^2.0.10+1
   shared_preferences: ^2.2.0
-  file_picker: ^6.0.0
+
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.