拆分功能完成，包含所有功能。

app/src/main/AndroidManifest.xml

@@ -73,6 +73,12 @@
             android:label="@string/app_name"
             android:screenOrientation="portrait" />
 
+        <activity
+            android:name=".ui.act.SplitPdfResultActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:screenOrientation="portrait" />
+
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.fileprovider"

app/src/main/java/com/all/pdfreader/pro/app/ui/act/SplitPdfActivity.kt

@@ -22,12 +22,22 @@ import com.all.pdfreader.pro.app.ui.dialog.RenameDialogFragment
 import com.all.pdfreader.pro.app.util.FileUtils.toUnderscoreDateTime
 import com.all.pdfreader.pro.app.util.PdfUtils
 import com.gyf.immersionbar.ImmersionBar
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import java.io.File
 
 class SplitPdfActivity : BaseActivity() {
     override val TAG: String = "SplitPdfActivity"
 
+
+    private var currentViewState: ViewState = ViewState.SPLIT_LIST
+
+    private enum class ViewState {
+        SPLIT_LIST,     // 拆分页列表
+        SPLIT_SELECTED  // 已选页面列表
+    }
+
     companion object {
         private const val EXTRA_PDF_PATH = "extra_pdf_path"
 
@@ -110,8 +120,7 @@ class SplitPdfActivity : BaseActivity() {
         }
         binding.continueNowBtn.setOnClickListener {
             val selectedPages = splitList.filter { it.isSelected }.map { it.copy() }
-            val name =
+            val name = getString(R.string.split) + "_" + System.currentTimeMillis().toUnderscoreDateTime()
-                getString(R.string.split) + "_" + System.currentTimeMillis().toUnderscoreDateTime()
             val item = PdfSelectedPagesItem(filePath, name, selectedPages)
             selectedList.add(item)
             selectedPdfAdapter.updateAdapter()
@@ -119,20 +128,28 @@ class SplitPdfActivity : BaseActivity() {
             updateViewState(true)
         }
         binding.addBtn.setOnClickListener {
-            //点击重新添加后，选中状态全部置为false，全选按钮置为false
+            binding.continueNowBtn.isEnabled = false//继续按钮不可点击
+            updateContinueNowBtnState(false)//重置继续按钮背景
             adapter.setAllSelected(false)
             updateSelectAllState(false)
             updateViewState(false)
         }
         binding.splitBtn.setOnClickListener {
-
+            //因为图片做的路径缓存方式，所以这里直接传入整个集合到result页处理
+            val intent = SplitPdfResultActivity.createIntent(this, ArrayList(selectedList))
+            startActivity(intent)
+            finish()
         }
     }
 
     private fun initSplitData(file: File) {
         lifecycleScope.launch {
             splitList.clear()
-            PdfUtils.clearPdfThumbsCache(this@SplitPdfActivity) // 先清理旧缓存
+            // 先切换到 IO 线程执行删除，等待完成
+            withContext(Dispatchers.IO) {
+                PdfUtils.clearPdfThumbsCache(this@SplitPdfActivity)
+            }
+            // 删除完成后，开始收集数据
             lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
                 var firstPageLoaded = false
                 PdfUtils.splitPdfToPageItemsFlow(this@SplitPdfActivity, file).collect { pageItem ->
@@ -143,7 +160,7 @@ class SplitPdfActivity : BaseActivity() {
                         splitList[pageItem.pageIndex] = pageItem
                         adapter.updateItem(pageItem.pageIndex)
                     }
-                    if (!firstPageLoaded) {//有数据回来则隐藏loading，显示全选按钮
+                    if (!firstPageLoaded) {
                         binding.loadingRoot.root.visibility = View.GONE
                         binding.selectAllBtn.visibility = View.VISIBLE
                         firstPageLoaded = true
@@ -176,10 +193,12 @@ class SplitPdfActivity : BaseActivity() {
 
     private fun updateViewState(b: Boolean) {
         if (b) {
+            currentViewState = ViewState.SPLIT_SELECTED
             binding.selectAllBtn.visibility = View.GONE//隐藏全选按钮
             binding.addBtn.visibility = View.VISIBLE//显示add按钮
             binding.title.text = getString(R.string.split_pdf)//设置标题
         } else {
+            currentViewState = ViewState.SPLIT_LIST
             binding.selectAllBtn.visibility = View.VISIBLE
             binding.addBtn.visibility = View.GONE
             binding.title.text =
@@ -221,15 +240,19 @@ class SplitPdfActivity : BaseActivity() {
 
     override fun onDestroy() {
         super.onDestroy()
-        splitList.clear()
-        PdfUtils.clearPdfThumbsCache(this)
     }
 
     private fun setupBackPressedCallback() {
         onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
             override fun handleOnBackPressed() {
-                if (isSelectedViewShow) {
+                if (!isSelectedViewShow) {//点击继续后，说明已经操过过了，不直接finish
-                    //使用提示对话框
+                    isEnabled = false
+                    onBackPressedDispatcher.onBackPressed()
+                    return
+                }
+                when (currentViewState) {
+                    ViewState.SPLIT_SELECTED -> {
+                        // 已选页面列表，提示是否退出
                         PromptDialogFragment(
                             getString(R.string.exit_split),
                             getString(R.string.confirm_discard_changes),
@@ -238,9 +261,16 @@ class SplitPdfActivity : BaseActivity() {
                                 isEnabled = false
                                 onBackPressedDispatcher.onBackPressed()
                             }).show(supportFragmentManager, getString(R.string.exit_split))
-                } else {
+                    }
-                    isEnabled = false
+
-                    onBackPressedDispatcher.onBackPressed()
+                    ViewState.SPLIT_LIST -> {
+                        // 拆分页列表，返回到已选页面列表
+                        adapter.setAllSelected(false)//重置所有选中状态为false
+                        updateSelectAllState(false)//重置选中按钮
+                        binding.continueNowBtn.isEnabled = false//继续按钮不可点击
+                        updateContinueNowBtnState(false)//重置继续按钮背景
+                        updateViewState(true)
+                    }
                 }
             }
         })

app/src/main/java/com/all/pdfreader/pro/app/ui/act/SplitPdfResultActivity.kt

@@ -2,11 +2,17 @@ package com.all.pdfreader.pro.app.ui.act
 
 import android.content.Context
 import android.content.Intent
+import android.os.Build
 import android.os.Bundle
+import android.os.Environment
+import android.os.Parcelable
+import android.view.View
+import androidx.activity.OnBackPressedCallback
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
 import androidx.recyclerview.widget.LinearLayoutManager
+import com.all.pdfreader.pro.app.PRApp
 import com.all.pdfreader.pro.app.R
 import com.all.pdfreader.pro.app.databinding.ActivityPdfSplitResultBinding
 import com.all.pdfreader.pro.app.model.PdfPageItem
@@ -14,9 +20,14 @@ import com.all.pdfreader.pro.app.model.PdfSelectedPagesItem
 import com.all.pdfreader.pro.app.model.PdfSplitResultItem
 import com.all.pdfreader.pro.app.ui.act.SplitPdfActivity
 import com.all.pdfreader.pro.app.ui.adapter.SplitPdfResultAdapter
+import com.all.pdfreader.pro.app.ui.dialog.PromptDialogFragment
+import com.all.pdfreader.pro.app.util.AppUtils
+import com.all.pdfreader.pro.app.util.PdfScanner
 import com.all.pdfreader.pro.app.util.PdfUtils
 import com.gyf.immersionbar.ImmersionBar
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import java.io.File
 
 class SplitPdfResultActivity : BaseActivity() {
@@ -26,11 +37,10 @@ class SplitPdfResultActivity : BaseActivity() {
         private const val EXTRA_SELECTED_LIST = "extra_selected_list"
 
         fun createIntent(
-            context: Context,
+            context: Context, list: ArrayList<PdfSelectedPagesItem>
-            selectedPageIndices: List<Int>
         ): Intent {
             return Intent(context, SplitPdfResultActivity::class.java).apply {
-
+                putParcelableArrayListExtra(EXTRA_SELECTED_LIST, list)
             }
         }
     }
@@ -38,15 +48,24 @@ class SplitPdfResultActivity : BaseActivity() {
     private lateinit var binding: ActivityPdfSplitResultBinding
     private lateinit var adapter: SplitPdfResultAdapter
     private var splitResultList: MutableList<PdfSplitResultItem> = mutableListOf()
+    private lateinit var selectedList: ArrayList<PdfSelectedPagesItem>
+    private var isSplitting = false
+    private var exitDialog: PromptDialogFragment? = null
+    private val pdfRepository = getRepository()
+    private lateinit var pdfScanner: PdfScanner
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivityPdfSplitResultBinding.inflate(layoutInflater)
         setContentView(binding.root)
+        setupBackPressedCallback()
         ImmersionBar.with(this).statusBarView(binding.view).statusBarDarkFont(true)
             .navigationBarColor(R.color.bg_color).init()
+        selectedList = requireParcelableArrayList(EXTRA_SELECTED_LIST)
+        pdfScanner = PdfScanner(this, pdfRepository)
         initView()
         setupClick()
+        initData()
     }
 
     private fun initView() {
@@ -55,25 +74,80 @@ class SplitPdfResultActivity : BaseActivity() {
         binding.recyclerView.adapter = adapter
     }
 
-    private fun startSplittingPDF(
+    private fun initData() {
-        inputFile: File, selectedPages: List<PdfPageItem>, outputDir: File, outputFileName: String
+        lifecycleScope.launch(Dispatchers.IO) {
-    ) {
+            val totalPages = selectedList.sumOf { it.pages.count { it.isSelected } }
-        lifecycleScope.launch {
+            var processedPages = 0
-            lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
+
-                val resultFile = PdfUtils.exportSelectedPages(
+            withContext(Dispatchers.Main) {
+                isSplitting = true
+                binding.splittingLayout.visibility = View.VISIBLE
+                binding.progressBar.isIndeterminate = false
+                binding.progressBar.progress = 0
+                binding.progressBar.max = 100
+            }
+
+            for (item in selectedList) {
+                val selectedPages = item.pages.filter { it.isSelected }
+                if (selectedPages.isEmpty()) continue
+
+                val inputFile = File(item.filePath)
+                val outputDir = File(
+                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS),
+                    "PDFReaderPro/split"
+                ).apply { if (!exists()) mkdirs() }
+
+                PdfUtils.exportSelectedPages(
                     inputFile = inputFile,
                     selectedPages = selectedPages,
                     outputDir = outputDir,
-                    outputFileName = outputFileName,
+                    outputFileName = "${item.fileName}.pdf",
-                    onProgress = { current, total ->
+                    onProgress = { _, _ -> // 不需要单文件百分比
-
+                        processedPages++// 每页处理完成就加一，多个 PDF 顺序处理时，总进度线性递增
-                    })
+                        val percent = (processedPages.toFloat() / totalPages * 100).toInt()
+                        lifecycleScope.launch(Dispatchers.Main) {
+                            binding.progressTv.text = "$percent"
+                            binding.progressBar.progress = percent
+                        }
+                    })?.let { resultFile ->
+                    val thumbnails =
+                        AppUtils.generateFastThumbnail(this@SplitPdfResultActivity, resultFile)
+                    val result = PdfSplitResultItem(resultFile.absolutePath, thumbnails, false)
+                    pdfScanner.addNewPdfToDatabase(result.filePath, result.thumbnailPath) {
+                        splitResultList.add(result)
+                    }
+                }
+            }
+            withContext(Dispatchers.Main) {
+                binding.splittingLayout.visibility = View.GONE
+                // 默认选中第一个
+                if (splitResultList.isNotEmpty() && splitResultList.none { it.isSelected }) {
+                    splitResultList[0].isSelected = true
+                }
+                adapter.updateAdapter()
+                isSplitting = false//拆分结束
+                exitDialog?.dismissAllowingStateLoss()
+                exitDialog = null
             }
         }
     }
 
     private fun setupClick() {
         binding.backBtn.setOnClickListener {
+            onBackPressedDispatcher.onBackPressed()
+        }
+        binding.shareBtn.setOnClickListener {
+            val selectedItem = adapter.getSelectedItem()
+            selectedItem?.let {
+                AppUtils.shareFile(this, File(selectedItem.filePath))
+            }
+        }
+        binding.okBtn.setOnClickListener {
+            val selectedItem = adapter.getSelectedItem()
+            selectedItem?.let {
+                val intent = PdfViewActivity.createIntent(this, selectedItem.filePath)
+                startActivity(intent)
+            }
             finish()
         }
     }
@@ -82,4 +156,42 @@ class SplitPdfResultActivity : BaseActivity() {
         super.onDestroy()
     }
 
+    private fun setupBackPressedCallback() {
+        onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (isSplitting) {
+                    exitDialog = PromptDialogFragment(
+                        getString(R.string.exit_split),
+                        getString(R.string.confirm_discard_changes),
+                        getString(R.string.discard),
+                        onOkClick = {
+                            isEnabled = false
+                            onBackPressedDispatcher.onBackPressed()
+                        })
+                    exitDialog?.show(supportFragmentManager, getString(R.string.exit_split))
+                } else {
+                    isEnabled = false
+                    onBackPressedDispatcher.onBackPressed()
+                }
+            }
+        })
+    }
+
+    /**
+     * 通用方法：读取必传参数，如果为 null 直接 finish
+     */
+    @Suppress("DEPRECATION")
+    private inline fun <reified T : Parcelable> requireParcelableArrayList(key: String): ArrayList<T> {
+        val result: ArrayList<T>? = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            intent.getParcelableArrayListExtra(key, T::class.java)
+        } else {
+            intent.getParcelableArrayListExtra(key)
+        }
+
+        if (result.isNullOrEmpty()) {
+            showToast(getString(R.string.pdf_loading_failed))
+            finish()
+        }
+        return result ?: arrayListOf()
+    }
 }

app/src/main/java/com/all/pdfreader/pro/app/ui/adapter/SplitPdfResultAdapter.kt

@@ -43,6 +43,20 @@ class SplitPdfResultAdapter(
         } else {
             holder.binding.selectIv.visibility = View.INVISIBLE
         }
+        holder.binding.root.setOnClickListener {
+            val oldSelectedIndex = list.indexOfFirst { it.isSelected }
+            val newSelectedIndex = holder.bindingAdapterPosition
+            if (oldSelectedIndex != newSelectedIndex && newSelectedIndex != RecyclerView.NO_POSITION) {
+                // 取消之前选中
+                if (oldSelectedIndex >= 0) {
+                    list[oldSelectedIndex].isSelected = false
+                    notifyItemChanged(oldSelectedIndex)
+                }
+                // 选中当前
+                list[newSelectedIndex].isSelected = true
+                notifyItemChanged(newSelectedIndex)
+            }
+        }
     }
 
     override fun getItemCount(): Int = list.size
@@ -52,7 +66,7 @@ class SplitPdfResultAdapter(
         notifyDataSetChanged()
     }
 
-    fun updateItem(position: Int) = notifyItemChanged(position)
+    fun getSelectedItem(): PdfSplitResultItem? {
-
+        return list.firstOrNull { it.isSelected }
-    fun removeItem(position: Int) = notifyItemRemoved(position)
+    }
 }

app/src/main/java/com/all/pdfreader/pro/app/util/PdfScanner.kt

@@ -70,8 +70,7 @@ class PdfScanner(
                                         val newThumbnail = generateFastThumbnail(context, file)
                                         if (newThumbnail != null && doc.thumbnailPath != newThumbnail) {
                                             pdfRepository.updateThumbnailPath(
-                                                doc.filePath,
+                                                doc.filePath, newThumbnail
-                                                newThumbnail
                                             )
                                             LogUtil.logDebug(TAG, "✅ 缩略图已更新")
                                         }
@@ -136,8 +135,7 @@ class PdfScanner(
                                         val newThumbnail = generateFastThumbnail(context, file)
                                         if (newThumbnail != null && document.thumbnailPath != newThumbnail) {
                                             pdfRepository.updateThumbnailPath(
-                                                document.filePath,
+                                                document.filePath, newThumbnail
-                                                newThumbnail
                                             )
                                             LogUtil.logDebug(TAG, "✅ 缩略图已更新")
                                         }
@@ -162,8 +160,7 @@ class PdfScanner(
                                     val currentIsPassword = isPdfEncrypted(file)
                                     if (existingDoc.isPassword != currentIsPassword) {
                                         LogUtil.logDebug(TAG, "✅ 密码状态需要更新")
-                                        updatedDoc =
+                                        updatedDoc = updatedDoc.copy(isPassword = currentIsPassword)
-                                            updatedDoc.copy(isPassword = currentIsPassword)
                                         needUpdate = true
                                     }
 
@@ -180,8 +177,7 @@ class PdfScanner(
                                         val newThumbnail = generateFastThumbnail(context, file)
                                         if (newThumbnail != null && existingDoc.thumbnailPath != newThumbnail) {
                                             pdfRepository.updateThumbnailPath(
-                                                existingDoc.filePath,
+                                                existingDoc.filePath, newThumbnail
-                                                newThumbnail
                                             )
                                             LogUtil.logDebug(TAG, "✅ 缩略图已更新")
                                         }
@@ -194,7 +190,9 @@ class PdfScanner(
                             val file = File(doc.filePath)
                             if (!file.exists()) {
                                 // 文件不存在 → 删除数据库记录
-                                LogUtil.logDebug(TAG, "最终过滤：文件不存在 -> ${doc.fileName}, 删除记录")
+                                LogUtil.logDebug(
+                                    TAG, "最终过滤：文件不存在 -> ${doc.fileName}, 删除记录"
+                                )
                                 pdfRepository.deleteDocument(doc.filePath)
                             } else {
                                 LogUtil.logDebug(
@@ -240,16 +238,62 @@ class PdfScanner(
         }
     }
 
-    fun shouldScan(): Boolean {
+    /**
-        return ScanManager.shouldScan(context)
+     * 添加单个pdf文件到数据库
+     */
+    suspend fun addNewPdfToDatabase(
+        pathFile: String,
+        thumbnailPath: String?,
+        callback: (Boolean) -> Unit = {}
+    ) {
+        val file = File(pathFile)
+        if (!file.exists() || !FileUtils.isPdfFile(file)) {
+            LogUtil.logDebug(TAG, "文件不存在或不是PDF: $pathFile")
+            withContext(Dispatchers.Main) {
+                callback.invoke(false)
+            }
+            return
         }
 
-    fun getLastScanTime(): Long {
+        try {
-        return ScanManager.getLastScanTime(context)
+            withContext(Dispatchers.IO) {
+                val existingDoc = pdfRepository.getDocumentByPath(file.absolutePath)
+                if (existingDoc == null) {
+                    val isPassword = isPdfEncrypted(file)
+                    val metadata = PdfMetadataExtractor.extractMetadata(file.absolutePath)
+
+                    val document = PdfDocumentEntity(
+                        filePath = file.absolutePath,
+                        fileName = file.name,
+                        fileSize = file.length(),
+                        lastModified = file.lastModified(),
+                        pageCount = metadata?.pageCount ?: 0,
+                        thumbnailPath = thumbnailPath,
+                        metadataTitle = metadata?.title,
+                        metadataAuthor = metadata?.author,
+                        metadataSubject = metadata?.subject,
+                        metadataKeywords = metadata?.keywords,
+                        metadataCreationDate = metadata?.creationDate?.time,
+                        metadataModificationDate = metadata?.modificationDate?.time,
+                        isPassword = isPassword
+                    )
+
+                    pdfRepository.insertOrUpdateDocument(document)
+                    LogUtil.logDebug(TAG, "✅ 新PDF已保存到数据库: ${file.name}")
+
+                    withContext(Dispatchers.Main) {
+                        callback.invoke(true)
+                    }
+                } else {
+                    Log.e(TAG, "数据库有已有相同的文件")
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "❌ 添加新PDF出错: ${e.message}", e)
+            withContext(Dispatchers.Main) {
+                callback.invoke(false)
+            }
+        }
     }
 
-    fun getHoursSinceLastScan(): Long {
-        val lastScan = getLastScanTime()
-        return TimeUnit.MILLISECONDS.toHours(System.currentTimeMillis() - lastScan)
-    }
 }

app/src/main/java/com/all/pdfreader/pro/app/util/PdfUtils.kt

@@ -133,5 +133,4 @@ object PdfUtils {
             null
         }
     }
-
 }

app/src/main/res/layout/activity_pdf_split_result.xml

@@ -11,6 +11,57 @@
         android:layout_width="match_parent"
         android:layout_height="0dp" />
 
+    <LinearLayout
+        android:id="@+id/splittingLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/progressTv"
+                style="@style/TextViewFont_PopSemiBold"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="0"
+                android:textColor="@color/black"
+                android:textSize="32sp" />
+
+            <TextView
+                style="@style/TextViewFont_PopSemiBold"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="%"
+                android:textColor="@color/black"
+                android:textSize="18sp" />
+
+        </LinearLayout>
+
+        <TextView
+            style="@style/TextViewFont_PopMedium"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/splitting"
+            android:textColor="@color/black"
+            android:textSize="18sp" />
+
+        <ProgressBar
+            android:id="@+id/progressBar"
+            style="?android:attr/progressBarStyleHorizontal"
+            android:layout_width="match_parent"
+            android:layout_height="24dp"
+            android:layout_margin="32dp"
+            android:indeterminate="true" />
+
+    </LinearLayout>
+
     <LinearLayout
         android:id="@+id/statusLayout"
         android:layout_width="match_parent"
@@ -122,7 +173,7 @@
                     style="@style/TextViewFont_PopSemiBold"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:text="@string/ok"
+                    android:text="@string/open"
                     android:textColor="@color/white"
                     android:textSize="16sp" />
             </LinearLayout>

app/src/main/res/values/strings.xml

@@ -15,10 +15,11 @@
     <string name="permission_notice">Permission is required to access files</string>
     <string name="cancel">Cancel</string>
     <string name="ok">OK</string>
+    <string name="open">Open</string>
     <string name="sort_by">Sort by</string>
     <string name="created_date">Created Date</string>
     <string name="path">Path</string>
-    <string name="path_details">Path %1$s</string>
+    <string name="path_details">Path: %1$s</string>
     <string name="file_name">File Name</string>
     <string name="file_size">File Size</string>
     <string name="ascending">Ascending</string>
@@ -133,4 +134,5 @@
     <string name="congratulations">Congratulations</string>
     <string name="file_created_success">Your file has been successfully created</string>
     <string name="please_select_page">Please select at least one page</string>
+    <string name="splitting">Splitting…</string>
 </resources>