feat: 增加数据备份功能

- 导出 CSV/Excel 功能
- 数据导入
- 数据迁移工具
- 定期自动备份

README.md

@@ -59,9 +59,10 @@
 - [x] 成员图标 (家人、朋友、同事等)
 
 ### 4. 数据管理 (进行中 🚀)
-- [ ] 导出 CSV/Excel 功能
+- [x] 导出 CSV/Excel 功能
-- [ ] 数据迁移工具
+- [x] 数据导入
-- [ ] 定期自动备份
+- [x] 数据迁移工具
+- [x] 定期自动备份
 - [ ] 备份加密功能
 
 ### 5. 预算管理 (计划中 💡)

app/build.gradle.kts

@@ -107,4 +107,9 @@ dependencies {
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
+
+    // CSV Excel 库
+    implementation("com.opencsv:opencsv:5.7.1")
+    implementation("org.apache.poi:poi:5.2.3")
+    implementation("org.apache.poi:poi-ooxml:5.2.3")
 }

app/src/main/java/com/yovinchen/bookkeeping/MainActivity.kt

@@ -1,9 +1,12 @@
 package com.yovinchen.bookkeeping
 
 import android.app.Activity
+import android.net.Uri
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
@@ -19,6 +22,31 @@ import com.yovinchen.bookkeeping.model.ThemeMode
 import com.yovinchen.bookkeeping.ui.components.predefinedColors
 import com.yovinchen.bookkeeping.ui.navigation.MainNavigation
 import com.yovinchen.bookkeeping.ui.theme.BookkeepingTheme
+import com.yovinchen.bookkeeping.utils.FilePickerUtil
+
+private var filePickerLauncher: ActivityResultLauncher<Array<String>>? = null
+
+fun ComponentActivity.getPreregisteredFilePickerLauncher(): ActivityResultLauncher<Array<String>> {
+    return filePickerLauncher ?: throw IllegalStateException("FilePickerLauncher not initialized")
+}
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+
+        // 预注册文件选择器
+        filePickerLauncher = registerForActivityResult(
+            ActivityResultContracts.OpenDocument()
+        ) { uri: Uri? ->
+            FilePickerUtil.handleFileSelection(this, uri)
+        }
+
+        setContent {
+            BookkeepingApp()
+        }
+    }
+}
 
 @Composable
 private fun SystemBarColor(isDarkTheme: Boolean) {
@@ -88,16 +116,6 @@ fun BookkeepingApp() {
     }
 }
 
-class MainActivity : ComponentActivity() {
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        WindowCompat.setDecorFitsSystemWindows(window, false)
-        setContent {
-            BookkeepingApp()
-        }
-    }
-}
-
 @Composable
 fun Greeting(name: String, modifier: Modifier = Modifier) {
     Text(

app/src/main/java/com/yovinchen/bookkeeping/data/BookkeepingDatabase.kt

@@ -181,14 +181,14 @@ abstract class BookkeepingDatabase : RoomDatabase() {
                                         insertCategory(Category(name = "水果", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_fruit_24dp))
                                         insertCategory(Category(name = "零食", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_snack_24dp))
                                         insertCategory(Category(name = "蔬菜", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_vegetable_24dp))
+                                        insertCategory(Category(name = "会员", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_membership_24dp))
+                                        insertCategory(Category(name = "礼物", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_gift_24dp))
                                         insertCategory(Category(name = "其他支出", type = TransactionType.EXPENSE, icon = R.drawable.ic_category_more_24dp))
 
                                         // 收入分类
                                         insertCategory(Category(name = "工资", type = TransactionType.INCOME, icon = R.drawable.ic_category_membership_24dp))
                                         insertCategory(Category(name = "奖金", type = TransactionType.INCOME, icon = R.drawable.ic_category_gift_24dp))
                                         insertCategory(Category(name = "投资", type = TransactionType.INCOME, icon = R.drawable.ic_category_digital_24dp))
-                                        insertCategory(Category(name = "礼物", type = TransactionType.INCOME, icon = R.drawable.ic_category_gift_24dp))
-                                        insertCategory(Category(name = "会员费", type = TransactionType.INCOME, icon = R.drawable.ic_category_membership_24dp))
                                         insertCategory(Category(name = "其他收入", type = TransactionType.INCOME, icon = R.drawable.ic_category_more_24dp))
                                     }
 

app/src/main/java/com/yovinchen/bookkeeping/ui/screen/HomeScreen.kt

@@ -54,7 +54,6 @@ fun HomeScreen(
     val filteredRecords by viewModel.filteredRecords.collectAsState()
     val categories by viewModel.categories.collectAsState(initial = emptyList())
     val members by viewModel.members.collectAsState(initial = emptyList())
-    val selectedMember by viewModel.selectedMember.collectAsState()
     val totalIncome by viewModel.totalIncome.collectAsState()
     val totalExpense by viewModel.totalExpense.collectAsState()
 

app/src/main/java/com/yovinchen/bookkeeping/ui/screen/MemberDetailScreen.kt

@@ -144,7 +144,7 @@ fun MemberDetailScreen(
                                 categoryData = categoryData,
                                 memberData = emptyList(),
                                 currentViewMode = false,
-                                onCategoryClick = { selectedCategory ->
+                                onCategoryClick = {
                                     // 暂时不处理点击事件
                                 }
                             )

app/src/main/java/com/yovinchen/bookkeeping/ui/screen/SettingsScreen.kt

@@ -1,36 +1,23 @@
 package com.yovinchen.bookkeeping.ui.screen
 
+import android.content.Context
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.layout.Row
+import androidx.compose.material3.*
-import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.*
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.material3.AlertDialog
-import androidx.compose.material3.Divider
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.ListItem
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.RadioButton
-import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.yovinchen.bookkeeping.model.ThemeMode
-import com.yovinchen.bookkeeping.ui.components.ColorPicker
+import com.yovinchen.bookkeeping.ui.components.*
-import com.yovinchen.bookkeeping.ui.components.predefinedColors
+import com.yovinchen.bookkeeping.ui.dialog.*
-import com.yovinchen.bookkeeping.ui.dialog.CategoryManagementDialog
+import com.yovinchen.bookkeeping.utils.FilePickerUtil
-import com.yovinchen.bookkeeping.ui.dialog.MemberManagementDialog
+import com.yovinchen.bookkeeping.viewmodel.*
-import com.yovinchen.bookkeeping.viewmodel.MemberViewModel
-import com.yovinchen.bookkeeping.viewmodel.SettingsViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -43,10 +30,13 @@ fun SettingsScreen(
     var showThemeDialog by remember { mutableStateOf(false) }
     var showCategoryDialog by remember { mutableStateOf(false) }
     var showMemberDialog by remember { mutableStateOf(false) }
+    var showBackupDialog by remember { mutableStateOf(false) }
+    var showRestoreDialog by remember { mutableStateOf(false) }
     
     val categories by viewModel.categories.collectAsState()
     val selectedType by viewModel.selectedCategoryType.collectAsState()
     val members by memberViewModel.allMembers.collectAsState(initial = emptyList())
+    val context = LocalContext.current
 
     Column(modifier = Modifier.fillMaxSize()) {
         // 成员管理设置项
@@ -56,7 +46,7 @@ fun SettingsScreen(
             modifier = Modifier.clickable { showMemberDialog = true }
         )
 
-        Divider()
+        HorizontalDivider()
 
         // 类别管理设置项
         ListItem(
@@ -65,7 +55,16 @@ fun SettingsScreen(
             modifier = Modifier.clickable { showCategoryDialog = true }
         )
 
-        Divider()
+        HorizontalDivider()
+
+        // 数据备份设置项
+        ListItem(
+            headlineContent = { Text("数据备份") },
+            supportingContent = { Text("备份和恢复数据") },
+            modifier = Modifier.clickable { showBackupDialog = true }
+        )
+
+        HorizontalDivider()
 
         // 主题设置项
         ListItem(
@@ -117,7 +116,7 @@ fun SettingsScreen(
                             }
                         )
 
-                        Divider(modifier = Modifier.padding(vertical = 8.dp))
+                        HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
 
                         // 颜色选择器
                         Text(
@@ -145,6 +144,100 @@ fun SettingsScreen(
                 }
             )
         }
+
+        // 备份对话框
+        if (showBackupDialog) {
+            AlertDialog(
+                onDismissRequest = { showBackupDialog = false },
+                title = { Text("数据备份") },
+                text = {
+                    Column(
+                        modifier = Modifier.fillMaxWidth(),
+                        verticalArrangement = Arrangement.spacedBy(8.dp)
+                    ) {
+                        Button(
+                            onClick = { viewModel.exportToCSV(context) },
+                            modifier = Modifier.fillMaxWidth()
+                        ) {
+                            Text("导出为CSV")
+                        }
+                        Button(
+                            onClick = { viewModel.exportToExcel(context) },
+                            modifier = Modifier.fillMaxWidth()
+                        ) {
+                            Text("导出为Excel")
+                        }
+                        Button(
+                            onClick = { showRestoreDialog = true },
+                            modifier = Modifier.fillMaxWidth()
+                        ) {
+                            Text("恢复数据")
+                        }
+                        Row(
+                            modifier = Modifier.fillMaxWidth(),
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Text("自动备份", modifier = Modifier.weight(1f))
+                            Switch(
+                                checked = viewModel.isAutoBackupEnabled.collectAsState().value,
+                                onCheckedChange = { viewModel.setAutoBackup(it) }
+                            )
+                        }
+                        if (viewModel.isAutoBackupEnabled.collectAsState().value) {
+                            Text(
+                                "自动备份将每24小时创建一次备份，保存在应用私有目录中",
+                                style = MaterialTheme.typography.bodySmall
+                            )
+                        }
+                    }
+                },
+                confirmButton = {
+                    TextButton(onClick = { showBackupDialog = false }) {
+                        Text("关闭")
+                    }
+                }
+            )
+        }
+
+        // 恢复对话框
+        if (showRestoreDialog) {
+            AlertDialog(
+                onDismissRequest = { showRestoreDialog = false },
+                title = { Text("恢复数据") },
+                text = {
+                    Column {
+                        Text("请选择要恢复的备份文件（CSV或Excel格式）")
+                        Text(
+                            "注意：恢复数据将覆盖当前的所有数据！",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.error
+                        )
+                    }
+                },
+                confirmButton = {
+                    TextButton(
+                        onClick = {
+                            showRestoreDialog = false
+                            // 启动文件选择器
+                            val activity = context as? ComponentActivity
+                            if (activity != null) {
+                                FilePickerUtil.startFilePicker(activity) { file ->
+                                    viewModel.restoreData(context, file)
+                                }
+                            } else {
+                                Toast.makeText(context, "无法启动文件选择器", Toast.LENGTH_SHORT).show()
+                            }
+                        }
+                    ) {
+                        Text("选择文件")
+                    }
+                },
+                dismissButton = {
+                    TextButton(onClick = { showRestoreDialog = false }) {
+                        Text("取消")
+                    }
+                }
+            )
         }
 
         // 类别管理对话框
@@ -182,6 +275,7 @@ fun SettingsScreen(
                 }
             )
         }
+    }
 }
 
 @Composable

app/src/main/java/com/yovinchen/bookkeeping/utils/FilePickerUtil.kt

@@ -0,0 +1,105 @@
+package com.yovinchen.bookkeeping.utils
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.result.contract.ActivityResultContracts
+import com.yovinchen.bookkeeping.getPreregisteredFilePickerLauncher
+import java.io.File
+import java.io.FileOutputStream
+
+object FilePickerUtil {
+    private var currentCallback: ((File) -> Unit)? = null
+
+    fun startFilePicker(activity: ComponentActivity, onFileSelected: (File) -> Unit) {
+        currentCallback = onFileSelected
+        
+        try {
+            val mimeTypes = arrayOf(
+                "text/csv",
+                "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+                "application/vnd.ms-excel"
+            )
+            activity.getPreregisteredFilePickerLauncher().launch(mimeTypes)
+        } catch (e: Exception) {
+            Toast.makeText(activity, "无法启动文件选择器：${e.message}", Toast.LENGTH_SHORT).show()
+            currentCallback = null
+        }
+    }
+
+    fun handleFileSelection(context: Context, uri: Uri?) {
+        if (uri == null) {
+            Toast.makeText(context, "未选择文件", Toast.LENGTH_SHORT).show()
+            currentCallback = null
+            return
+        }
+
+        try {
+            val mimeType = context.contentResolver.getType(uri)
+            if (!isValidFileType(uri.toString(), mimeType)) {
+                Toast.makeText(context, "请选择CSV或Excel文件", Toast.LENGTH_SHORT).show()
+                return
+            }
+
+            // 获取持久性权限
+            val takeFlags: Int = Intent.FLAG_GRANT_READ_URI_PERMISSION or
+                    Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+            context.contentResolver.takePersistableUriPermission(uri, takeFlags)
+
+            // 将选中的文件复制到应用私有目录
+            val tempFile = copyUriToTempFile(context, uri)
+            if (tempFile != null) {
+                currentCallback?.invoke(tempFile)
+            } else {
+                Toast.makeText(context, "文件处理失败，请重试", Toast.LENGTH_SHORT).show()
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            Toast.makeText(context, "文件处理出错：${e.message}", Toast.LENGTH_SHORT).show()
+        } finally {
+            currentCallback = null
+        }
+    }
+
+    private fun isValidFileType(fileName: String, mimeType: String?): Boolean {
+        val fileExtension = fileName.lowercase()
+        return fileExtension.endsWith(".csv") || 
+               fileExtension.endsWith(".xlsx") ||
+               fileExtension.endsWith(".xls") ||
+               mimeType == "text/csv" ||
+               mimeType == "application/vnd.ms-excel" ||
+               mimeType == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
+    }
+
+    private fun copyUriToTempFile(context: Context, uri: Uri): File? {
+        return try {
+            val fileName = getFileName(context, uri) ?: "temp_backup_${System.currentTimeMillis()}"
+            val tempFile = File(context.cacheDir, fileName)
+            
+            context.contentResolver.openInputStream(uri)?.use { inputStream ->
+                FileOutputStream(tempFile).use { outputStream ->
+                    inputStream.copyTo(outputStream)
+                }
+            }
+            tempFile
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
+
+    private fun getFileName(context: Context, uri: Uri): String? {
+        var fileName: String? = null
+        context.contentResolver.query(uri, null, null, null, null)?.use { cursor ->
+            if (cursor.moveToFirst()) {
+                val displayNameIndex = cursor.getColumnIndex(android.provider.OpenableColumns.DISPLAY_NAME)
+                if (displayNameIndex != -1) {
+                    fileName = cursor.getString(displayNameIndex)
+                }
+            }
+        }
+        return fileName
+    }
+}

app/src/main/java/com/yovinchen/bookkeeping/viewmodel/SettingsViewModel.kt

@@ -1,28 +1,52 @@
 package com.yovinchen.bookkeeping.viewmodel
 
 import android.app.Application
+import android.content.Context
+import android.os.Environment
+import android.widget.Toast
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
+import com.opencsv.CSVReader
+import com.opencsv.CSVWriter
 import com.yovinchen.bookkeeping.data.BookkeepingDatabase
+import com.yovinchen.bookkeeping.model.BookkeepingRecord
 import com.yovinchen.bookkeeping.model.Category
 import com.yovinchen.bookkeeping.model.TransactionType
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import org.apache.poi.xssf.usermodel.XSSFWorkbook
+import java.io.File
+import java.io.FileReader
+import java.io.FileWriter
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import java.util.concurrent.TimeUnit
 
 @OptIn(ExperimentalCoroutinesApi::class)
 class SettingsViewModel(application: Application) : AndroidViewModel(application) {
     private val database = BookkeepingDatabase.getDatabase(application)
     private val dao = database.bookkeepingDao()
+    private val memberDao = database.memberDao()
+    private val _isAutoBackupEnabled = MutableStateFlow(false)
+    val isAutoBackupEnabled: StateFlow<Boolean> = _isAutoBackupEnabled.asStateFlow()
 
     private val _selectedCategoryType = MutableStateFlow(TransactionType.EXPENSE)
     val selectedCategoryType: StateFlow<TransactionType> = _selectedCategoryType.asStateFlow()
 
-    val categories: StateFlow<List<Category>> = _selectedCategoryType
+    val categories: StateFlow<List<Category>> = _selectedCategoryType.flatMapLatest { type ->
-        .flatMapLatest { type ->
             dao.getCategoriesByType(type)
-        }
+        }.stateIn(
-        .stateIn(
             scope = viewModelScope,
             started = SharingStarted.WhileSubscribed(5000),
             initialValue = emptyList()
@@ -57,4 +81,228 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     suspend fun isCategoryInUse(categoryName: String): Boolean {
         return dao.isCategoryInUse(categoryName)
     }
+
+    fun setAutoBackup(enabled: Boolean) {
+        viewModelScope.launch {
+            _isAutoBackupEnabled.value = enabled
+            if (enabled) {
+                schedulePeriodicBackup()
+            }
+        }
+    }
+
+    private fun schedulePeriodicBackup() {
+        viewModelScope.launch(Dispatchers.IO) {
+            while (isAutoBackupEnabled.value) {
+                try {
+                    // 创建自动备份
+                    SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
+                    val backupDir = File(
+                        getApplication<Application>().getExternalFilesDir(null), "auto_backups"
+                    )
+                    if (!backupDir.exists()) {
+                        backupDir.mkdirs()
+                    }
+
+                    // 导出CSV
+                    exportToCSV(getApplication(), backupDir)
+
+                    // 等待24小时
+                    delay(TimeUnit.HOURS.toMillis(24))
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                }
+            }
+        }
+    }
+
+    fun exportToCSV(context: Context, customDir: File? = null) {
+        viewModelScope.launch(Dispatchers.IO) {
+            try {
+                val timestamp =
+                    SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
+                val fileName = "bookkeeping_backup_$timestamp.csv"
+                val downloadsDir = customDir ?: Environment.getExternalStoragePublicDirectory(
+                    Environment.DIRECTORY_DOWNLOADS
+                )
+                val file = File(downloadsDir, fileName)
+
+                CSVWriter(FileWriter(file)).use { writer ->
+                    // 写入头部
+                    writer.writeNext(arrayOf("日期", "类型", "金额", "类别", "备注", "成员"))
+
+                    // 获取所有记录和成员
+                    val records = dao.getAllRecords().first()
+                    val members = memberDao.getAllMembers().first()
+
+                    // 写入数据行
+                    records.forEach { record ->
+                        val member = members.find { member -> member.id == record.memberId }
+                        writer.writeNext(
+                            arrayOf(
+                                SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault()).format(
+                                    record.date
+                                ),
+                                record.type.toString(),
+                                record.amount.toString(),
+                                record.category,
+                                record.description,
+                                member?.name ?: "自己"
+                            )
+                        )
+                    }
+                }
+
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(context, "CSV导出成功: ${file.absolutePath}", Toast.LENGTH_LONG)
+                        .show()
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(context, "CSV导出失败: ${e.message}", Toast.LENGTH_LONG).show()
+                }
+            }
+        }
+    }
+
+    fun exportToExcel(context: Context) {
+        viewModelScope.launch(Dispatchers.IO) {
+            try {
+                val workbook = XSSFWorkbook()
+                val sheet = workbook.createSheet("账目记录")
+
+                // 创建标题行
+                val headerRow = sheet.createRow(0)
+                val headers = arrayOf("日期", "类型", "金额", "类别", "备注", "成员")
+                headers.forEachIndexed { index, header ->
+                    headerRow.createCell(index).setCellValue(header)
+                }
+
+                // 获取所有记录和成员
+                val records = dao.getAllRecords().first()
+                val members = memberDao.getAllMembers().first()
+
+                records.forEachIndexed { index, record ->
+                    val row = sheet.createRow(index + 1)
+                    val member = members.find { member -> member.id == record.memberId }
+
+                    row.createCell(0).setCellValue(
+                        SimpleDateFormat(
+                            "yyyy-MM-dd HH:mm:ss", Locale.getDefault()
+                        ).format(record.date)
+                    )
+                    row.createCell(1).setCellValue(record.type.toString())
+                    row.createCell(2).setCellValue(record.amount)
+                    row.createCell(3).setCellValue(record.category)
+                    row.createCell(4).setCellValue(record.description)
+                    row.createCell(5).setCellValue(member?.name ?: "自己")
+                }
+
+                val timestamp =
+                    SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
+                val fileName = "bookkeeping_backup_$timestamp.xlsx"
+                val downloadsDir =
+                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
+                val file = File(downloadsDir, fileName)
+
+                workbook.write(file.outputStream())
+                workbook.close()
+
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(
+                        context, "Excel导出成功: ${file.absolutePath}", Toast.LENGTH_LONG
+                    ).show()
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(context, "Excel导出失败: ${e.message}", Toast.LENGTH_LONG).show()
+                }
+            }
+        }
+    }
+
+    fun restoreData(context: Context, backupFile: File) {
+        viewModelScope.launch(Dispatchers.IO) {
+            try {
+                when {
+                    backupFile.name.endsWith(".csv", ignoreCase = true) -> {
+                        restoreFromCSV(backupFile)
+                    }
+
+                    backupFile.name.endsWith(".xlsx", ignoreCase = true) -> {
+                        restoreFromExcel(backupFile)
+                    }
+
+                    else -> {
+                        withContext(Dispatchers.Main) {
+                            Toast.makeText(context, "不支持的文件格式", Toast.LENGTH_LONG).show()
+                        }
+                        return@launch
+                    }
+                }
+
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(context, "数据恢复成功", Toast.LENGTH_LONG).show()
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+                withContext(Dispatchers.Main) {
+                    Toast.makeText(context, "数据恢复失败: ${e.message}", Toast.LENGTH_LONG).show()
+                }
+            }
+        }
+    }
+
+    private suspend fun restoreFromCSV(file: File) {
+        CSVReader(FileReader(file)).use { reader ->
+            // 跳过标题行
+            reader.readNext()
+
+            // 读取数据行
+            var currentLine = reader.readNext()
+            while (currentLine != null) {
+                val record = BookkeepingRecord(
+                    type = TransactionType.valueOf(currentLine[1]),
+                    amount = currentLine[2].toDouble(),
+                    category = currentLine[3],
+                    description = currentLine[4],
+                    date = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault()).parse(
+                        currentLine[0]
+                    ) ?: Date(),
+                    memberId = findMemberIdByName(currentLine[5])
+                )
+                dao.insertRecord(record)
+                currentLine = reader.readNext()
+            }
+        }
+    }
+
+    private suspend fun restoreFromExcel(file: File) {
+        val workbook = XSSFWorkbook(file)
+        val sheet = workbook.getSheetAt(0)
+
+        // 跳过标题行
+        for (rowIndex in 1..sheet.lastRowNum) {
+            val row = sheet.getRow(rowIndex)
+            val record = BookkeepingRecord(
+                type = TransactionType.valueOf(row.getCell(1).stringCellValue),
+                amount = row.getCell(2).numericCellValue,
+                category = row.getCell(3).stringCellValue,
+                description = row.getCell(4).stringCellValue,
+                date = SimpleDateFormat(
+                    "yyyy-MM-dd HH:mm:ss",
+                    Locale.getDefault()
+                ).parse(row.getCell(0).stringCellValue),
+                memberId = findMemberIdByName(row.getCell(5).stringCellValue)
+            )
+            dao.insertRecord(record)
+        }
+        workbook.close()
+    }
+
+    private suspend fun findMemberIdByName(name: String): Int? {
+        return memberDao.getAllMembers().first().find { member -> member.name == name }?.id
+    }
 }