优化扫描方法：
1.分快速扫描与全盘扫描 2.下拉刷新必定调用全扫 3.每次重新创建应用则进行全盘扫描 4.每次只进入onResume则进行快速扫描
This commit is contained in:
ocean
parent
810399bcf8
commit
1f664cd191
@ -11,6 +11,8 @@ class PDFReaderApplication : Application() {
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private lateinit var instance: PDFReaderApplication
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fun getInstance(): PDFReaderApplication = instance
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fun getContext(): Context = instance.applicationContext
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//是新创建了界面，则需要全盘扫描，进入onResume判定，扫描方法调用后置为false
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var isNeedFullScan = false
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}
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private lateinit var fileChangeObserver: FileChangeObserver
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@ -18,7 +20,7 @@ class PDFReaderApplication : Application() {
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override fun onCreate() {
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super.onCreate()
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instance = this
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isNeedFullScan = true
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// 初始化文件变化监听（不立即启动）
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fileChangeObserver = FileChangeObserver(this)
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@ -158,20 +158,28 @@ class MainActivity : BaseActivity(), PermissionDialogFragment.PermissionCallback
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}
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private fun scanningStrategy() {
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// 智能扫描策略
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if (pdfScanner.shouldScan()) {
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logDebug("🔄 需要扫描PDF文件 (首次启动或超过24小时)")
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if (StoragePermissionHelper.hasBasicStoragePermission(this)) {
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lifecycleScope.launch {
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pdfScanner.scanAndLoadPdfFiles()
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}
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} else {
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logDebug("❌ 权限不足，跳过扫描")
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if (StoragePermissionHelper.hasBasicStoragePermission(this)) {
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lifecycleScope.launch {
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pdfScanner.scanAndLoadPdfFiles(PDFReaderApplication.isNeedFullScan)
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}
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} else {
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val hoursAgo = pdfScanner.getHoursSinceLastScan()
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logDebug("⏭️ 跳过扫描，上次扫描在${hoursAgo}小时前")
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logDebug("❌ 权限不足，跳过扫描")
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}
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// // 智能扫描策略
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// if (pdfScanner.shouldScan()) {
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// logDebug("🔄 需要扫描PDF文件 (首次启动或超过24小时)")
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// if (StoragePermissionHelper.hasBasicStoragePermission(this)) {
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// lifecycleScope.launch {
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// pdfScanner.scanAndLoadPdfFiles()
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// }
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// } else {
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// logDebug("❌ 权限不足，跳过扫描")
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// }
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// } else {
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// val hoursAgo = pdfScanner.getHoursSinceLastScan()
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// logDebug("⏭️ 跳过扫描，上次扫描在${hoursAgo}小时前")
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// }
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}
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// 授权后续操作
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@ -52,7 +52,7 @@ class HomeFrag : BaseFrag(), MainActivity.SortableFragment {
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binding.swipeRefreshLayout.setOnRefreshListener {
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lifecycleScope.launch {
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val pdfScanner = PdfScanner(requireContext(), getRepository())
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pdfScanner.scanAndLoadPdfFiles { b ->
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pdfScanner.scanAndLoadPdfFiles(true) { b ->
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binding.swipeRefreshLayout.isRefreshing = false
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}
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}
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@ -8,11 +8,14 @@ import android.os.Looper
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import android.provider.MediaStore
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import android.util.Log
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import androidx.lifecycle.LifecycleObserver
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import com.all.pdfreader.pro.app.room.repository.PdfRepository
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import com.all.pdfreader.pro.app.util.FileUtils.getFileFromUri
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.SupervisorJob
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.launch
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import java.io.File
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class FileChangeObserver(
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private val context: Context,
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@ -32,7 +35,15 @@ class FileChangeObserver(
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contentObserver = object : ContentObserver(Handler(Looper.getMainLooper())) {
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override fun onChange(selfChange: Boolean, uri: Uri?) {
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super.onChange(selfChange, uri)
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handleFileChange()
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if (uri != null) {
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val file = getFileFromUri(context, uri)
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if (file != null) {
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Log.d("ocean", "修改的文件: ${file.absolutePath}")
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// 可以传给你的增量扫描逻辑
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handleFileChange(file)
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}
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}
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}
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}
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@ -63,7 +74,7 @@ class FileChangeObserver(
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}
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}
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private fun handleFileChange() {
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private fun handleFileChange(file: File) {
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val currentTime = System.currentTimeMillis()
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if (currentTime - lastScanTime < debounceDelay) {
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return // 防抖
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@ -76,7 +87,18 @@ class FileChangeObserver(
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if (StoragePermissionHelper.hasBasicStoragePermission(context)) {
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Log.d("ocean", "📂 检测到文件变化，可以执行增量扫描...")
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val pdfRepository = PdfRepository.getInstance()
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val existingDoc = pdfRepository.getDocumentByPath(file.absolutePath)
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if (existingDoc != null) {
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LogUtil.logDebug(
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"ocean",
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"PdfScanner: 📖 ${existingDoc.fileName} - ${existingDoc.pageCount}页 - ${
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FileUtils.formatFileSize(
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existingDoc.fileSize
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)
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} - ${existingDoc.thumbnailPath}"
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)
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}
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}
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}
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}
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@ -344,4 +344,35 @@ object FileUtils {
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} catch (_: Exception) {}
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}
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}
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fun getFileFromUri(context: Context, uri: Uri): File? {
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// 先尝试通过 DATA 字段获取
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val projection = arrayOf(MediaStore.Files.FileColumns.DATA)
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context.contentResolver.query(uri, projection, null, null, null)?.use { cursor ->
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if (cursor.moveToFirst()) {
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val path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.DATA))
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if (!path.isNullOrEmpty()) {
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val file = File(path)
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if (file.exists()) {
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return file
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}
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}
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}
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}
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// Android 10+ 或 DATA 字段为空时，使用 ContentResolver 流访问
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return try {
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val tempFile = File(context.cacheDir, "temp_pdf_${System.currentTimeMillis()}.pdf")
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context.contentResolver.openInputStream(uri)?.use { input ->
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tempFile.outputStream().use { output ->
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input.copyTo(output)
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}
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}
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tempFile
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} catch (e: Exception) {
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Log.e("ocean", "无法获取文件: ${e.message}", e)
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null
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}
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}
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}
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@ -8,6 +8,7 @@ import android.graphics.pdf.PdfRenderer
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import android.os.ParcelFileDescriptor
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import android.util.Log
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import androidx.core.graphics.createBitmap
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import com.all.pdfreader.pro.app.PDFReaderApplication
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import com.all.pdfreader.pro.app.room.entity.PdfDocumentEntity
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import com.all.pdfreader.pro.app.room.repository.PdfRepository
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import com.all.pdfreader.pro.app.util.FileUtils.isPdfEncrypted
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@ -23,167 +24,208 @@ class PdfScanner(
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private val TAG = "ocean-PdfScanner"
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suspend fun scanAndLoadPdfFiles(callback: (Boolean) -> Unit = {}) {
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suspend fun scanAndLoadPdfFiles(isNeedFullScan: Boolean, callback: (Boolean) -> Unit = {}) {
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if (!StoragePermissionHelper.hasBasicStoragePermission(context)) {
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LogUtil.logDebug(TAG, "PdfScanner: 权限不足")
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LogUtil.logDebug(TAG, "权限不足")
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callback.invoke(false)
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return
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}
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withContext(Dispatchers.IO) {
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try {
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LogUtil.logDebug(TAG, "PdfScanner: 🔍 开始扫描PDF文件...")
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// 扫描应用私有目录（无需权限）
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val privateFiles = FileUtils.scanPdfFiles(context)
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LogUtil.logDebug(
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TAG, "PdfScanner: 📁 应用私有目录找到: ${privateFiles.size} 个PDF文件"
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)
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privateFiles.forEach { file ->
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LogUtil.logDebug(
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TAG,
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"PdfScanner: 📄 ${file.name} (${FileUtils.formatFileSize(file.length())})"
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)
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}
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// 扫描MediaStore（需要权限）
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val mediaStoreFiles = FileUtils.scanPdfFilesFromMediaStore(context)
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LogUtil.logDebug(
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TAG, "PdfScanner: 📱 MediaStore找到: ${mediaStoreFiles.size} 个PDF文件"
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)
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mediaStoreFiles.forEach { file ->
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LogUtil.logDebug(
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TAG,
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"PdfScanner: 📱 ${file.name} (${FileUtils.formatFileSize(file.length())})"
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)
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}
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// 合并并去重
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val allFiles = (privateFiles + mediaStoreFiles).distinctBy { it.absolutePath }
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LogUtil.logDebug(TAG, "PdfScanner: 📊 总计扫描到: ${allFiles.size} 个PDF文件")
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// 处理每个PDF文件
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allFiles.forEachIndexed { index, file ->
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LogUtil.logDebug(
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TAG,
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"PdfScanner: 🔄 处理文件 ${index + 1}/${allFiles.size}: ${file.name} - ${file.absolutePath}"
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)
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if (FileUtils.isPdfFile(file)) {
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val fileHash = FileUtils.calculateFileHash(file.absolutePath)
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LogUtil.logDebug(TAG, "PdfScanner: 🔑 文件哈希: $fileHash")
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if (fileHash != null) {
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val existingDoc = pdfRepository.getDocumentByPath(file.absolutePath)
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if (existingDoc == null) {
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LogUtil.logDebug(
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TAG, "PdfScanner: 🆕 发现新PDF文件: ${file.name}"
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)
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var thumbnailPath: String? = null
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val isPassword = isPdfEncrypted(file)
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LogUtil.logDebug(TAG, "PdfScanner: isPassword->${isPassword}")
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if (!isPassword) {//没有密码的情况下才去获取缩略图
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thumbnailPath = generateThumbnail(context, file) ?: ""
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}
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LogUtil.logDebug(TAG, "PdfScanner: thumbnailPath->${thumbnailPath}")
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val metadata =
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PdfMetadataExtractor.extractMetadata(file.absolutePath)
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val document = PdfDocumentEntity(
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fileHash = fileHash,
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filePath = file.absolutePath,
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fileName = file.name,
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fileSize = file.length(),
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val startScannerTime = System.currentTimeMillis()
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LogUtil.logDebug(TAG, "🔍开始扫描PDF文件...")
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LogUtil.logDebug(TAG, "获取数据库数据")
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val cachedDocs = pdfRepository.getAllDocumentsOnce()
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var needFullScan = isNeedFullScan
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if (!needFullScan) {
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cachedDocs.forEach { doc ->
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val file = File(doc.filePath)//得到数据库存储的文件路径
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if (file.exists()) {
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LogUtil.logDebug(TAG, "$file 文件存在，检测是否存在变化")
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var needUpdate = false
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var updatedDoc = doc.copy()
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// 修改时间 与 文件大小
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if (file.lastModified() != doc.lastModified || file.length() != doc.fileSize) {
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LogUtil.logDebug(TAG, "文件时间或者大小被修改 -> ${doc.fileName}")
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updatedDoc = updatedDoc.copy(
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lastModified = file.lastModified(),
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pageCount = metadata?.pageCount ?: 0,
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thumbnailPath = thumbnailPath,
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metadataTitle = metadata?.title,
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metadataAuthor = metadata?.author,
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metadataSubject = metadata?.subject,
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metadataKeywords = metadata?.keywords,
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metadataCreationDate = metadata?.creationDate?.time,
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metadataModificationDate = metadata?.modificationDate?.time,
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isPassword = isPassword
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fileSize = file.length()
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)
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pdfRepository.insertOrUpdateDocument(document)
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LogUtil.logDebug(
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TAG, "PdfScanner: ✅ 已保存到数据库: ${file.name}"
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)
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} else {
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LogUtil.logDebug(TAG, "PdfScanner: 📋 文件已存在: ${file.name}")
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// 🔹 文件已存在，检查是否需要更新
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var needUpdate = false
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var updatedDoc = existingDoc.copy()
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// 路径/修改时间更新
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if (existingDoc.filePath != file.absolutePath || existingDoc.lastModified != file.lastModified()) {
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LogUtil.logDebug(TAG, "PdfScanner: ✅ 路径/修改时间需要更新")
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updatedDoc = updatedDoc.copy(
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filePath = file.absolutePath,
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lastModified = file.lastModified()
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)
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needUpdate = true
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}
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// 是否加密更新
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needUpdate = true
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}
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if (needUpdate) {
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// 是否加密
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val currentIsPassword = isPdfEncrypted(file)
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if (existingDoc.isPassword != currentIsPassword) {
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LogUtil.logDebug(TAG, "PdfScanner: ✅ 密码状态需要更新")
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if (doc.isPassword != currentIsPassword) {
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LogUtil.logDebug(TAG, "密码状态变化 -> ${doc.fileName}")
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updatedDoc = updatedDoc.copy(isPassword = currentIsPassword)
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needUpdate = true
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}
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// 缩略图（仅非加密文件）
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if (!currentIsPassword) {
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// 如果不是加密 PDF，再生成缩略图
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val newThumbnail = generateThumbnail(context, file)
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if (existingDoc.thumbnailPath != newThumbnail) {
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LogUtil.logDebug(TAG, "PdfScanner: ✅ 缩略图需要更新")
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if (doc.thumbnailPath != newThumbnail) {
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updatedDoc = updatedDoc.copy(thumbnailPath = newThumbnail)
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}
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} else if (doc.thumbnailPath != null) {
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updatedDoc = updatedDoc.copy(thumbnailPath = null)
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}
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pdfRepository.insertOrUpdateDocument(updatedDoc)
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LogUtil.logDebug(TAG, "✅数据库已更新: ${doc.fileName}")
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}
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} else {
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// 文件不存在 → 删除数据库记录，并触发全盘扫描
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LogUtil.logDebug(TAG, "文件不存在 -> ${doc.fileName}, 删除记录")
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pdfRepository.deleteDocument(doc.fileHash)
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needFullScan = true
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}
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}
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}
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if (needFullScan || cachedDocs.isEmpty()) {
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LogUtil.logDebug(TAG, "数据库不完整，执行全盘扫描...")
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// 扫描应用私有目录（无需权限）
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val privateFiles = FileUtils.scanPdfFiles(context)
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LogUtil.logDebug(TAG, "📁应用私有目录找到: ${privateFiles.size} 个PDF文件")
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// 扫描MediaStore（需要权限）
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val mediaStoreFiles = FileUtils.scanPdfFilesFromMediaStore(context)
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LogUtil.logDebug(TAG, "📱MediaStore找到: ${mediaStoreFiles.size} 个PDF文件")
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// 合并并去重
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val allFiles = (privateFiles + mediaStoreFiles).distinctBy { it.absolutePath }
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LogUtil.logDebug(TAG, "📊总计扫描到: ${allFiles.size} 个PDF文件")
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// 处理每个PDF文件
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allFiles.forEachIndexed { index, file ->
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LogUtil.logDebug(
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TAG,
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"🔄处理文件 ${index + 1}/${allFiles.size}: ${file.name} - ${file.absolutePath}"
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)
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if (FileUtils.isPdfFile(file)) {
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val fileHash = FileUtils.calculateFileHash(file.absolutePath)
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LogUtil.logDebug(TAG, "🔑文件哈希: $fileHash")
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if (fileHash != null) {
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val existingDoc = pdfRepository.getDocumentByPath(file.absolutePath)
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if (existingDoc == null) {
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LogUtil.logDebug(
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TAG, "🆕发现新PDF文件: ${file.name}"
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)
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var thumbnailPath: String? = null
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val isPassword = isPdfEncrypted(file)
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LogUtil.logDebug(TAG, "isPassword->${isPassword}")
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if (!isPassword) {//没有密码的情况下才去获取缩略图
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thumbnailPath = generateThumbnail(context, file) ?: ""
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}
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LogUtil.logDebug(TAG, "thumbnailPath->${thumbnailPath}")
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val metadata =
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PdfMetadataExtractor.extractMetadata(file.absolutePath)
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val document = PdfDocumentEntity(
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fileHash = fileHash,
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filePath = file.absolutePath,
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fileName = file.name,
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fileSize = file.length(),
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lastModified = file.lastModified(),
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pageCount = metadata?.pageCount ?: 0,
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thumbnailPath = thumbnailPath,
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metadataTitle = metadata?.title,
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metadataAuthor = metadata?.author,
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metadataSubject = metadata?.subject,
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metadataKeywords = metadata?.keywords,
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metadataCreationDate = metadata?.creationDate?.time,
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metadataModificationDate = metadata?.modificationDate?.time,
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isPassword = isPassword
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)
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pdfRepository.insertOrUpdateDocument(document)
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LogUtil.logDebug(
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TAG, " ✅ 已保存到数据库: ${file.name}"
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)
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} else {
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LogUtil.logDebug(TAG, " 📋 文件已存在: ${file.name}")
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// 🔹 文件已存在，检查是否需要更新
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var needUpdate = false
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var updatedDoc = existingDoc.copy()
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// 路径/修改时间更新
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if (existingDoc.filePath != file.absolutePath || existingDoc.lastModified != file.lastModified()) {
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LogUtil.logDebug(TAG, "✅ 路径/修改时间需要更新")
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updatedDoc = updatedDoc.copy(
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filePath = file.absolutePath,
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lastModified = file.lastModified()
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)
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needUpdate = true
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}
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} else {
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updatedDoc = updatedDoc.copy(thumbnailPath = null)
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needUpdate = true
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}
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// 执行更新
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if (needUpdate) {
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pdfRepository.insertOrUpdateDocument(updatedDoc)
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LogUtil.logDebug(
|
||||
TAG, "PdfScanner: ✅ 数据库已更新: ${file.name}"
|
||||
)
|
||||
} else {
|
||||
LogUtil.logDebug(
|
||||
TAG, "PdfScanner: ⏩ 无需更新: ${file.name}"
|
||||
)
|
||||
// 是否加密更新
|
||||
val currentIsPassword = isPdfEncrypted(file)
|
||||
if (existingDoc.isPassword != currentIsPassword) {
|
||||
LogUtil.logDebug(TAG, "✅ 密码状态需要更新")
|
||||
updatedDoc = updatedDoc.copy(isPassword = currentIsPassword)
|
||||
needUpdate = true
|
||||
}
|
||||
|
||||
if (!currentIsPassword) {
|
||||
// 如果不是加密 PDF，再生成缩略图
|
||||
val newThumbnail = generateThumbnail(context, file)
|
||||
if (existingDoc.thumbnailPath != newThumbnail) {
|
||||
LogUtil.logDebug(TAG, "✅ 缩略图需要更新")
|
||||
updatedDoc =
|
||||
updatedDoc.copy(thumbnailPath = newThumbnail)
|
||||
needUpdate = true
|
||||
}
|
||||
} else {
|
||||
updatedDoc = updatedDoc.copy(thumbnailPath = null)
|
||||
needUpdate = true
|
||||
}
|
||||
|
||||
// 执行更新
|
||||
if (needUpdate) {
|
||||
pdfRepository.insertOrUpdateDocument(updatedDoc)
|
||||
LogUtil.logDebug(
|
||||
TAG, "✅ 数据库已更新: ${file.name}"
|
||||
)
|
||||
} else {
|
||||
LogUtil.logDebug(
|
||||
TAG, "⏩ 无需更新: ${file.name}"
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// 打印数据库中的总记录数
|
||||
pdfRepository.getAllDocumentsOnce().forEach { doc ->
|
||||
LogUtil.logDebug(
|
||||
TAG, " 📖 ${doc.fileName} - ${doc.pageCount}页 - ${
|
||||
FileUtils.formatFileSize(
|
||||
doc.fileSize
|
||||
)
|
||||
} - ${doc.thumbnailPath}"
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
// 打印数据库中的总记录数
|
||||
pdfRepository.getAllDocumentsOnce().forEach { doc ->
|
||||
LogUtil.logDebug(
|
||||
TAG, "PdfScanner: 📖 ${doc.fileName} - ${doc.pageCount}页 - ${
|
||||
FileUtils.formatFileSize(
|
||||
doc.fileSize
|
||||
)
|
||||
} - ${doc.thumbnailPath}"
|
||||
)
|
||||
}
|
||||
|
||||
// 标记扫描完成
|
||||
ScanManager.markScanComplete(context)
|
||||
val lastScanTime = ScanManager.getLastScanTime(context)
|
||||
LogUtil.logDebug(
|
||||
TAG, "PdfScanner: ✅ 扫描完成，记录时间: ${java.util.Date(lastScanTime)}"
|
||||
TAG, "✅ 扫描完成，记录时间: ${java.util.Date(lastScanTime)}"
|
||||
)
|
||||
|
||||
var string = if (needFullScan) {
|
||||
"全盘扫描"
|
||||
} else if (cachedDocs.isEmpty()) {
|
||||
"数据库没有值，第一次全盘扫描"
|
||||
} else {
|
||||
"快速扫描"
|
||||
}
|
||||
// 计算扫描耗时
|
||||
val scannerTime = System.currentTimeMillis() - startScannerTime
|
||||
LogUtil.logDebug(
|
||||
TAG,
|
||||
"$string 本次扫描耗时: $scannerTime ms (${scannerTime / 1000.0} 秒)"
|
||||
)
|
||||
PDFReaderApplication.isNeedFullScan = false
|
||||
callback.invoke(true)
|
||||
|
||||
} catch (e: Exception) {
|
||||
Log.e(TAG, "PdfScanner: ❌ 扫描出错: ${e.message}", e)
|
||||
Log.e(TAG, "❌ 扫描出错: ${e.message}", e)
|
||||
callback.invoke(false)
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user