添加拆分pdf展示界面。

app/build.gradle.kts

@@ -61,4 +61,5 @@ dependencies {
     implementation(libs.glide)
     implementation(libs.androidpdfviewer)
     implementation(libs.pdfbox.android)
+    implementation(libs.jp2forandroid)
 }

app/src/main/AndroidManifest.xml

@@ -67,6 +67,12 @@
             </intent-filter>
         </activity>
 
+        <activity
+            android:name=".ui.act.SplitPdfActivity"
+            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/PRApp.kt

@@ -5,6 +5,7 @@ import android.content.Context
 import androidx.annotation.StringRes
 import com.all.pdfreader.pro.app.room.repository.PdfRepository
 import com.all.pdfreader.pro.app.util.FileChangeObserver
+import com.tom_roush.pdfbox.android.PDFBoxResourceLoader
 
 class PRApp : Application() {
 
@@ -34,6 +35,8 @@ class PRApp : Application() {
 
         // 初始化数据库
         PdfRepository.initialize(this)
+        // 初始化pdfbox
+        PDFBoxResourceLoader.init(this)
     }
 
     // 在权限授权后调用

app/src/main/java/com/all/pdfreader/pro/app/model/PdfPageItem.kt

@@ -0,0 +1,10 @@
+package com.all.pdfreader.pro.app.model
+
+/**
+ * 拆分pdf，展示用的每页信息
+ */
+data class PdfPageItem(
+    val pageIndex: Int,
+    var previewFilePath: String?, // 缓存文件路径
+    var isSelected: Boolean
+)

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

@@ -0,0 +1,112 @@
+package com.all.pdfreader.pro.app.ui.act
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import androidx.recyclerview.widget.GridLayoutManager
+import com.all.pdfreader.pro.app.R
+import com.all.pdfreader.pro.app.databinding.ActivityPdfSplitBinding
+import com.all.pdfreader.pro.app.model.PdfPageItem
+import com.all.pdfreader.pro.app.ui.adapter.SplitPdfAdapter
+import com.all.pdfreader.pro.app.util.PdfUtils
+import com.gyf.immersionbar.ImmersionBar
+import kotlinx.coroutines.launch
+import java.io.File
+
+class SplitPdfActivity : BaseActivity() {
+    override val TAG: String = "SplitPdfActivity"
+
+    companion object {
+        private const val EXTRA_PDF_PATH = "extra_pdf_path"
+
+        fun createIntent(context: Context, filePath: String): Intent {
+            return Intent(context, SplitPdfActivity::class.java).apply {
+                putExtra(EXTRA_PDF_PATH, filePath)
+            }
+        }
+    }
+
+    private lateinit var binding: ActivityPdfSplitBinding
+    private lateinit var adapter: SplitPdfAdapter
+    private var splitList: MutableList<PdfPageItem> = mutableListOf()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityPdfSplitBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        ImmersionBar.with(this).statusBarView(binding.view).statusBarDarkFont(true)
+            .navigationBarColor(R.color.white).init()
+        val filePath = intent.getStringExtra(EXTRA_PDF_PATH)
+            ?: throw IllegalArgumentException("PDF file hash is required")
+        if (filePath.isEmpty()) {
+            showToast(getString(R.string.file_not))
+            finish()
+        }
+        initView()
+        setupClick()
+        initSplitData(File(filePath))
+    }
+
+    private fun initView() {
+        binding.title.text = getString(R.string.selected_page, 0)
+        binding.selectAllBtn.visibility = View.GONE
+        binding.loadingRoot.root.visibility = View.VISIBLE
+        binding.splitRv.layoutManager = GridLayoutManager(this, 2)
+        adapter = SplitPdfAdapter(splitList) { item, pos ->
+            item.isSelected = !item.isSelected
+            adapter.setItemSelected(pos, item.isSelected)
+            binding.title.text = getString(R.string.selected_page, adapter.getSelPages())
+        }
+        binding.splitRv.adapter = adapter
+    }
+
+    private fun setupClick() {
+        binding.backBtn.setOnClickListener { finish() }
+        binding.selectAllBtn.setOnClickListener {
+            val selectAll = splitList.any { !it.isSelected }
+            adapter.setAllSelected(selectAll)
+            binding.title.text = getString(R.string.selected_page, adapter.getSelPages())
+
+            if (selectAll) {
+                binding.selectAll.setBackgroundResource(R.drawable.dr_circular_sel_on_bg)
+            } else {
+                binding.selectAll.setBackgroundResource(R.drawable.dr_circular_sel_off_bg)
+            }
+        }
+    }
+
+    private fun initSplitData(file: File) {
+        lifecycleScope.launch {
+            PdfUtils.clearPdfThumbsCache(this@SplitPdfActivity) // 先清理旧缓存
+            lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
+                var firstPageLoaded = false
+                PdfUtils.splitPdfToPageItemsFlow(this@SplitPdfActivity, file).collect { pageItem ->
+                    logDebug("pageItem flow ->$pageItem")
+                    if (splitList.size <= pageItem.pageIndex) {
+                        splitList.add(pageItem)
+                        adapter.notifyItemInserted(splitList.size - 1)
+                    } else {
+                        splitList[pageItem.pageIndex] = pageItem
+                        adapter.updateItem(pageItem.pageIndex)
+                    }
+                    if (!firstPageLoaded) {
+                        binding.loadingRoot.root.visibility = View.GONE
+                        binding.selectAllBtn.visibility = View.VISIBLE
+                        firstPageLoaded = true
+                    }
+                }
+                binding.loadingRoot.root.visibility = View.GONE
+            }
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        splitList.clear()
+        PdfUtils.clearPdfThumbsCache(this)
+    }
+}

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

@@ -0,0 +1,106 @@
+package com.all.pdfreader.pro.app.ui.adapter
+
+import android.annotation.SuppressLint
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.all.pdfreader.pro.app.R
+import com.all.pdfreader.pro.app.databinding.AdapterSplitPageItemBinding
+import com.all.pdfreader.pro.app.model.PdfPageItem
+import com.all.pdfreader.pro.app.util.AppUtils.dpToPx
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.resource.bitmap.CenterCrop
+import com.bumptech.glide.load.resource.bitmap.RoundedCorners
+import java.io.File
+
+class SplitPdfAdapter(
+    private val pdfList: MutableList<PdfPageItem>,
+    private val onItemClick: (PdfPageItem, Int) -> Unit
+) : RecyclerView.Adapter<SplitPdfAdapter.PdfViewHolder>() {
+
+    inner class PdfViewHolder(val binding: AdapterSplitPageItemBinding) :
+        RecyclerView.ViewHolder(binding.root)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = PdfViewHolder(
+        AdapterSplitPageItemBinding.inflate(
+            LayoutInflater.from(parent.context), parent, false
+        )
+    )
+
+    @SuppressLint("SetTextI18n")
+    override fun onBindViewHolder(holder: PdfViewHolder, position: Int) {
+        bindAll(holder, position)
+    }
+
+    // 支持 payload，局部刷新
+    override fun onBindViewHolder(
+        holder: PdfViewHolder, position: Int, payloads: MutableList<Any>
+    ) {
+        if (payloads.isEmpty()) {
+            bindAll(holder, position) // 全量刷新
+        } else {
+            if (payloads.any { it == "selection" }) {
+                bindSelectionOnly(holder, position)
+            }
+        }
+    }
+
+    @SuppressLint("SetTextI18n")
+    private fun bindAll(holder: PdfViewHolder, position: Int) {
+        val item = pdfList[position]
+        holder.binding.apply {
+            //更新文字图片与选中状态
+            pageNumberTv.text = "${item.pageIndex + 1}"
+            Glide.with(holder.binding.root)
+                .load(File(item.previewFilePath ?: ""))
+                .transform(CenterCrop(), RoundedCorners(8.dpToPx(holder.binding.root.context)))
+                .into(image)
+            bindSelection(item, holder)
+        }
+        holder.binding.root.setOnClickListener {
+            val pos = holder.bindingAdapterPosition
+            if (pos != RecyclerView.NO_POSITION) {
+                onItemClick(pdfList[pos], pos)
+            }
+        }
+    }
+
+    private fun bindSelectionOnly(holder: PdfViewHolder, position: Int) {
+        val item = pdfList[position]
+        bindSelection(item, holder)
+    }
+
+    //更新选中状态
+    private fun bindSelection(item: PdfPageItem, holder: PdfViewHolder) {
+        val b = holder.binding
+        val selRes =
+            if (item.isSelected) R.drawable.dr_circular_sel_on_bg else R.drawable.dr_circular_sel_off_bg
+        b.selIv.setBackgroundResource(selRes)
+
+        val bgRes = if (item.isSelected) R.drawable.dr_sel_on_frame else R.drawable.dr_sel_off_frame
+        b.itemBgLayout.setBackgroundResource(bgRes)
+
+        val pageBgRes =
+            if (item.isSelected) R.drawable.dr_item_page_number_sel_on_bg else R.drawable.dr_item_page_number_sel_off_bg
+        b.pageNumberTv.setBackgroundResource(pageBgRes)
+    }
+
+
+    override fun getItemCount() = pdfList.size
+
+    fun updateItem(position: Int) = notifyItemChanged(position)
+
+    // 只刷新选中状态
+    fun setItemSelected(position: Int, selected: Boolean) {
+        pdfList[position].isSelected = selected
+        notifyItemChanged(position, "selection") // 这里的 payload 就是标记
+    }
+
+    fun getSelPages() = pdfList.count { it.isSelected }
+
+    // 批量更新选中状态，用 payload 避免图片重新加载
+    fun setAllSelected(selected: Boolean) {
+        pdfList.forEach { it.isSelected = selected }
+        notifyItemRangeChanged(0, pdfList.size, "selection")
+    }
+}

app/src/main/java/com/all/pdfreader/pro/app/ui/dialog/ListMoreDialogFragment.kt

@@ -1,6 +1,7 @@
 package com.all.pdfreader.pro.app.ui.dialog
 
 import android.net.Uri
+import android.nfc.Tag
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -12,6 +13,8 @@ import com.all.pdfreader.pro.app.databinding.DialogListMoreBinding
 import com.all.pdfreader.pro.app.model.PrintResult
 import com.all.pdfreader.pro.app.model.RenameType
 import com.all.pdfreader.pro.app.room.entity.PdfDocumentEntity
+import com.all.pdfreader.pro.app.ui.act.SplitPdfActivity
+import com.all.pdfreader.pro.app.ui.fragment.HomeFrag
 import com.all.pdfreader.pro.app.util.AppUtils.dpToPx
 import com.all.pdfreader.pro.app.util.AppUtils.printPdfFile
 import com.all.pdfreader.pro.app.util.AppUtils.setClickWithAnimation
@@ -71,10 +74,14 @@ class ListMoreDialogFragment(val filePath: String) : BottomSheetDialogFragment()
     }
 
     private fun initUi() {
-        if (pdfDocument.lastOpenedTime > 0) {
+        if (tag == HomeFrag().tag) {
-            binding.removeRecentBtn.visibility = View.VISIBLE
-        } else {
             binding.removeRecentBtn.visibility = View.GONE
+        } else {
+            if (pdfDocument.lastOpenedTime > 0) {
+                binding.removeRecentBtn.visibility = View.VISIBLE
+            } else {
+                binding.removeRecentBtn.visibility = View.GONE
+            }
         }
         binding.tvFileName.text = pdfDocument.fileName
         binding.tvFileSize.text = pdfDocument.fileSize.toFormatFileSize()
@@ -181,6 +188,11 @@ class ListMoreDialogFragment(val filePath: String) : BottomSheetDialogFragment()
                 }).show(parentFragmentManager, "removeRecent")
             dismiss()
         }
+        binding.splitBtn.setOnClickListener {
+            val intent = SplitPdfActivity.createIntent(requireActivity(), pdfDocument.filePath)
+            startActivity(intent)
+            dismiss()
+        }
     }
 
     private fun updateCollectUi(b: Boolean) {

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

@@ -0,0 +1,129 @@
+package com.all.pdfreader.pro.app.util
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.os.ParcelFileDescriptor
+import androidx.core.graphics.createBitmap
+import com.all.pdfreader.pro.app.model.PdfPageItem
+import com.shockwave.pdfium.PdfiumCore
+import com.tom_roush.pdfbox.pdmodel.PDDocument
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.withContext
+import java.io.File
+import java.io.FileOutputStream
+
+object PdfUtils {
+
+    //拆分缩略图缓存地址
+    const val child = "pdf_split_thumbs"
+
+    //清除拆分缓存文件夹
+    fun clearPdfThumbsCache(context: Context) {
+        val cacheDir = File(context.cacheDir, child)
+        if (cacheDir.exists()) {
+            cacheDir.listFiles()?.forEach { it.delete() }
+        }
+    }
+
+    /**
+     * 分页渲染 PDF 并返回 Flow<PdfPageItem>
+     * 先 emit 页对象（preview = null），UI 可立即显示总页数
+     * 后续异步渲染 Bitmap 并更新对象
+     */
+    fun splitPdfToPageItemsFlow(
+        context: Context,
+        inputFile: File,
+        dpi: Float = 72f,
+        chunkSize: Int = 5,
+        thumbWidth: Int = 200
+    ): Flow<PdfPageItem> = flow {
+        val pdfiumCore = PdfiumCore(context)
+        ParcelFileDescriptor.open(inputFile, ParcelFileDescriptor.MODE_READ_ONLY).use { fd ->
+            val pdfDocument = pdfiumCore.newDocument(fd)
+            val pageCount = pdfiumCore.getPageCount(pdfDocument)
+
+            val pages = List(pageCount) {
+                PdfPageItem(pageIndex = it, previewFilePath = null, isSelected = false)
+            }
+
+            // 先 emit 页对象，让 UI 知道总页数
+            pages.forEach { emit(it) }
+
+            val cacheDir = File(context.cacheDir, child).apply { mkdirs() }
+
+            for (i in 0 until pageCount) {
+                pdfiumCore.openPage(pdfDocument, i)
+
+                val width = (pdfiumCore.getPageWidthPoint(pdfDocument, i) * dpi / 72).toInt()
+                val height = (pdfiumCore.getPageHeightPoint(pdfDocument, i) * dpi / 72).toInt()
+
+                val scale = thumbWidth.toFloat() / width
+                val targetHeight = (height * scale).toInt()
+
+                val bitmap = createBitmap(thumbWidth, targetHeight, Bitmap.Config.RGB_565)
+                val canvas = Canvas(bitmap)
+                canvas.scale(scale, scale)
+
+                pdfiumCore.renderPageBitmap(pdfDocument, bitmap, i, 0, 0, width, height)
+
+                // 保存为压缩 JPEG
+                val outFile = File(cacheDir, "page_$i.jpg")
+                FileOutputStream(outFile).use { fos ->
+                    bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos)
+                }
+                bitmap.recycle()
+
+                pages[i].previewFilePath = outFile.absolutePath
+                emit(pages[i])
+
+                if ((i + 1) % chunkSize == 0) delay(50) // 分批渲染，保证 UI 流畅
+            }
+
+            pdfiumCore.closeDocument(pdfDocument)
+        }
+    }.flowOn(Dispatchers.IO)
+
+    /**
+     * 获取 PDF 总页数
+     */
+    fun getPdfPageCount(inputFile: File): Int {
+        PDDocument.load(inputFile).use { return it.numberOfPages }
+    }
+
+    /**
+     * 导出用户勾选的页生成新的 PDF
+     * @param inputFile 原 PDF 文件
+     * @param selectedPages 用户选择的页列表
+     * @param outputDir 输出目录（外部存储可访问目录）
+     * @param outputFileName 输出文件名
+     */
+    suspend fun exportSelectedPages(
+        inputFile: File, selectedPages: List<PdfPageItem>, outputDir: File, outputFileName: String
+    ): File? = withContext(Dispatchers.IO) {
+        if (selectedPages.isEmpty()) return@withContext null
+
+        if (!outputDir.exists()) outputDir.mkdirs() // 确保目录存在
+
+        val outputFile = File(outputDir, outputFileName)
+        try {
+            PDDocument.load(inputFile).use { document ->
+                val newDocument = PDDocument()
+                selectedPages.sortedBy { it.pageIndex }.forEach { pageItem ->
+                    val page = document.getPage(pageItem.pageIndex)
+                    newDocument.addPage(page)
+                }
+                newDocument.save(outputFile)
+                newDocument.close()
+            }
+            outputFile
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
+}

app/src/main/res/drawable/back_black.xml

@@ -5,5 +5,5 @@
     android:viewportHeight="1024">
   <path
       android:pathData="M927.9,478.1 L168.9,478.1l308.7,-308.9c11.7,-11.7 11.4,-30.9 -0.6,-42.9 -12,-12 -31.2,-12.2 -42.9,-0.5L75.2,484.9c-2,1.7 -3.8,3.6 -5.3,5.7 -4,5.4 -6,11.8 -5.9,18.3 -0.1,7.8 2.7,15.6 8.6,21.4l361.6,361.7c11.7,11.7 30.9,11.4 42.9,-0.5 12,-12 12.2,-31.2 0.6,-42.9L168.4,539.5l759.4,0c16.5,0 29.9,-13.7 29.9,-30.7S944.4,478.1 927.9,478.1z"
-      android:fillColor="#2c2c2c"/>
+      android:fillColor="#000000"/>
 </vector>

app/src/main/res/drawable/bg_loading.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <solid android:color="#CC000000"/>
+    <corners android:radius="12dp"/>
+</shape>

app/src/main/res/drawable/dr_circular_sel_off_bg.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/icon_sel_off_color"/>
+</shape>

app/src/main/res/drawable/dr_circular_sel_on_bg.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/icon_sel_on_color"/>
+</shape>

app/src/main/res/drawable/dr_item_page_img_sel_off_bg.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:topLeftRadius="8dp"
+        android:bottomRightRadius="8dp" />
+    <solid android:color="@color/icon_sel_off_color" />
+</shape>

app/src/main/res/drawable/dr_item_page_img_sel_on_bg.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:topLeftRadius="8dp"
+        android:bottomRightRadius="8dp" />
+    <solid android:color="@color/icon_sel_on_color" />
+</shape>

app/src/main/res/drawable/dr_item_page_number_sel_off_bg.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:bottomLeftRadius="8dp"
+        android:topRightRadius="8dp" />
+    <solid android:color="@color/icon_sel_off_color" />
+</shape>

app/src/main/res/drawable/dr_item_page_number_sel_on_bg.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:bottomLeftRadius="8dp"
+        android:topRightRadius="8dp" />
+    <solid android:color="@color/icon_sel_on_color" />
+</shape>

app/src/main/res/drawable/dr_placeholder_bg.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/placeholder_bg_color"/>
+    <corners android:radius="8dp" />
+</shape>

app/src/main/res/drawable/dr_sel_off_frame.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <stroke android:color="@color/placeholder_bg_color"
+        android:width="1dp"/>
+    <corners android:radius="8dp" />
+</shape>

app/src/main/res/drawable/dr_sel_on_frame.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <stroke android:color="@color/icon_sel_on_color"
+        android:width="1dp"/>
+    <corners android:radius="8dp" />
+</shape>

app/src/main/res/drawable/file_document.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="256dp"
+    android:height="256dp"
+    android:viewportWidth="1024"
+    android:viewportHeight="1024">
+  <path
+      android:pathData="M842.7,285.9l-187.7,-187.7c-14.9,-14.9 -32,-21.3 -53.3,-21.3L234.7,76.8C194.1,74.7 160,108.8 160,149.3v725.3c0,40.5 34.1,74.7 74.7,74.7h554.7c40.5,0 74.7,-34.1 74.7,-74.7L864,337.1c0,-19.2 -8.5,-38.4 -21.3,-51.2zM797.9,330.7c-2.1,2.1 -4.3,0 -8.5,0h-170.7c-6.4,0 -10.7,-4.3 -10.7,-10.7L608,149.3c0,-2.1 0,-6.4 -2.1,-8.5 0,0 2.1,0 2.1,2.1l189.9,187.7zM789.3,885.3L234.7,885.3c-6.4,0 -10.7,-4.3 -10.7,-10.7L224,149.3c0,-6.4 4.3,-10.7 10.7,-10.7h311.5c-2.1,4.3 -2.1,6.4 -2.1,10.7v170.7c0,40.5 34.1,74.7 74.7,74.7h170.7c4.3,0 6.4,0 10.7,-2.1L800,874.7c0,6.4 -4.3,10.7 -10.7,10.7z"
+      android:fillColor="#cccccc"/>
+</vector>

app/src/main/res/drawable/gou_white.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="256dp"
+    android:height="256dp"
+    android:viewportWidth="1024"
+    android:viewportHeight="1024">
+  <path
+      android:pathData="M384,768c-12.8,0 -21.3,-4.3 -29.9,-12.8l-213.3,-213.3c-17.1,-17.1 -17.1,-42.7 0,-59.7s42.7,-17.1 59.7,0L384,665.6 823.5,226.1c17.1,-17.1 42.7,-17.1 59.7,0s17.1,42.7 0,59.7l-469.3,469.3c-8.5,8.5 -17.1,12.8 -29.9,12.8z"
+      android:fillColor="#ffffff"/>
+</vector>

app/src/main/res/drawable/icon_split.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="256dp"
+    android:height="256dp"
+    android:viewportWidth="1024"
+    android:viewportHeight="1024">
+  <path
+      android:pathData="M255.9,255.9v511.7h511.7v-511.7h-511.7zM703.6,703.6h-383.8v-383.8h383.8v383.8zM895.5,575.7v319.8h-319.8v64h383.8v-383.8zM127.9,447.8v-319.8h319.8v-64h-383.8v383.8z"
+      android:fillColor="#666666"/>
+</vector>

app/src/main/res/drawable/lock.xml

@@ -3,10 +3,10 @@
     android:height="256dp"
     android:viewportWidth="1024"
     android:viewportHeight="1024">
-  <path
+    <path
-      android:pathData="M785.1,416h-61.9v-121.6c0,-108.8 -91.7,-198.4 -202.7,-198.4s-202.7,89.6 -202.7,198.4v121.6h-78.9c-55.5,0 -100.3,44.8 -100.3,100.3v311.5c0,55.5 44.8,100.3 100.3,100.3h546.1c55.5,0 100.3,-44.8 100.3,-100.3L885.3,516.3c0,-55.5 -44.8,-100.3 -100.3,-100.3zM381.9,294.4c0,-74.7 61.9,-134.4 138.7,-134.4s138.7,59.7 138.7,134.4v121.6h-277.3v-121.6zM821.3,827.7c0,19.2 -17.1,36.3 -36.3,36.3L238.9,864c-19.2,0 -36.3,-17.1 -36.3,-36.3L202.7,516.3c0,-19.2 17.1,-36.3 36.3,-36.3h546.1c19.2,0 36.3,17.1 36.3,36.3v311.5z"
+        android:fillColor="#666666"
-      android:fillColor="#666666"/>
+        android:pathData="M785.1,416h-61.9v-121.6c0,-108.8 -91.7,-198.4 -202.7,-198.4s-202.7,89.6 -202.7,198.4v121.6h-78.9c-55.5,0 -100.3,44.8 -100.3,100.3v311.5c0,55.5 44.8,100.3 100.3,100.3h546.1c55.5,0 100.3,-44.8 100.3,-100.3L885.3,516.3c0,-55.5 -44.8,-100.3 -100.3,-100.3zM381.9,294.4c0,-74.7 61.9,-134.4 138.7,-134.4s138.7,59.7 138.7,134.4v121.6h-277.3v-121.6zM821.3,827.7c0,19.2 -17.1,36.3 -36.3,36.3L238.9,864c-19.2,0 -36.3,-17.1 -36.3,-36.3L202.7,516.3c0,-19.2 17.1,-36.3 36.3,-36.3h546.1c19.2,0 36.3,17.1 36.3,36.3v311.5z" />
-  <path
+    <path
-      android:pathData="M512,544c-17.1,0 -32,14.9 -32,32v106.7c0,17.1 14.9,32 32,32s32,-14.9 32,-32v-106.7c0,-17.1 -14.9,-32 -32,-32z"
+        android:fillColor="#666666"
-      android:fillColor="#666666"/>
+        android:pathData="M512,544c-17.1,0 -32,14.9 -32,32v106.7c0,17.1 14.9,32 32,32s32,-14.9 32,-32v-106.7c0,-17.1 -14.9,-32 -32,-32z" />
 </vector>

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

@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/bg_color"
+    android:orientation="vertical">
+
+    <View
+        android:id="@+id/view"
+        android:layout_width="match_parent"
+        android:layout_height="0dp" />
+
+    <LinearLayout
+        android:id="@+id/statusLayout"
+        android:layout_width="match_parent"
+        android:layout_height="48dp"
+        android:gravity="center_vertical"
+        android:orientation="horizontal">
+
+        <LinearLayout
+            android:id="@+id/backBtn"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:gravity="center">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/back_black" />
+
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/title"
+            style="@style/TextViewFont_PopMedium"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_vertical"
+            android:text="@string/selected_page"
+            android:textColor="@color/black"
+            android:textSize="16sp" />
+
+        <LinearLayout
+            android:id="@+id/selectAllBtn"
+            android:layout_width="44dp"
+            android:layout_height="44dp"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            android:gravity="center">
+
+            <ImageView
+                android:id="@+id/selectAll"
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:background="@drawable/dr_circular_sel_off_bg"
+                android:padding="2dp"
+                android:src="@drawable/gou_white" />
+
+        </LinearLayout>
+    </LinearLayout>
+
+    <include
+        android:id="@+id/loadingRoot"
+        layout="@layout/layout_loading"
+        android:visibility="gone" />
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/splitRv"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_margin="8dp"
+            android:overScrollMode="never"
+            android:scrollbars="none"
+            app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
+            app:spanCount="2"
+            tools:itemCount="6"
+            tools:listitem="@layout/adapter_split_page_item" />
+
+        <LinearLayout
+            android:id="@+id/allow_access_btn"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_alignParentBottom="true"
+            android:layout_margin="16dp"
+            android:background="@drawable/dr_btn_not_clickable_bg"
+            android:gravity="center">
+
+            <TextView
+                style="@style/TextViewFont_PopSemiBold"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/continue_now"
+                android:textColor="@color/white"
+                android:textSize="16sp" />
+        </LinearLayout>
+    </RelativeLayout>
+</LinearLayout>

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

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+    <RelativeLayout
+        android:id="@+id/itemBgLayout"
+        android:layout_width="match_parent"
+        android:layout_height="230dp"
+        android:layout_margin="8dp"
+        android:background="@drawable/dr_sel_off_frame"
+        android:gravity="center"
+        android:padding="1dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:background="@drawable/dr_placeholder_bg"
+            android:gravity="center">
+
+            <ImageView
+                android:layout_width="56dp"
+                android:layout_height="56dp"
+                android:src="@drawable/file_document" />
+
+        </LinearLayout>
+
+        <ImageView
+            android:id="@+id/image"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:scaleType="centerCrop" />
+
+        <TextView
+            android:id="@+id/pageNumberTv"
+            style="@style/TextViewFont_PopMedium"
+            android:layout_width="wrap_content"
+            android:layout_height="24dp"
+            android:layout_alignParentBottom="true"
+            android:background="@drawable/dr_item_page_number_sel_off_bg"
+            android:gravity="center"
+            android:minWidth="24dp"
+            android:padding="2dp"
+            android:text="1"
+            android:textColor="@color/white" />
+
+        <ImageView
+            android:id="@+id/selIv"
+            android:layout_width="24dp"
+            android:layout_height="24dp"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentBottom="true"
+            android:background="@drawable/dr_item_page_img_sel_off_bg"
+            android:padding="2dp"
+            android:src="@drawable/gou_white" />
+
+    </RelativeLayout>
+</LinearLayout>

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

@@ -251,6 +251,28 @@
                 android:textSize="16sp" />
         </LinearLayout>
 
+        <LinearLayout
+            android:id="@+id/splitBtn"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:gravity="center_vertical"
+            android:orientation="horizontal">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@drawable/icon_split" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="16dp"
+                android:text="@string/split_pdf"
+                android:textColor="@color/grey_text_color"
+                android:textSize="16sp" />
+        </LinearLayout>
+
+
         <LinearLayout
             android:id="@+id/setPasswordBtn"
             android:layout_width="match_parent"

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

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/loading_root"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#50000000"
+    android:clickable="true"
+    android:focusable="true">
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:padding="24dp">
+
+        <ProgressBar
+            android:id="@+id/progress_bar"
+            style="?android:attr/progressBarStyleLarge"
+            android:layout_width="48dp"
+            android:indeterminateTint="@color/icon_sel_on_color"
+            android:layout_height="48dp"
+            android:indeterminate="true" />
+
+        <TextView
+            android:id="@+id/tv_loading"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/loading"
+            style="@style/TextViewFont_PopMedium"
+            android:textColor="#FFFFFF"
+            android:textSize="16sp" />
+
+    </LinearLayout>
+
+</FrameLayout>

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

@@ -23,4 +23,5 @@
     <color name="text_red_lv2">#BB6D64</color>
     <color name="btn_sel_on_color">#E43521</color>
     <color name="btn_sel_off_color">#33E43521</color>
+    <color name="placeholder_bg_color">#E8EAEE</color>
 </resources>

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

@@ -119,4 +119,9 @@
     <string name="delete_bookmarks_desc">Are you sure you want to delete all Bookmarks?</string>
     <string name="bookmark_loading">Loading bookmarks, please try again later</string>
     <string name="no_files_yet">no files yet</string>
+    <string name="split_pdf">Split PDF</string>
+    <string name="merge_pdf">Merge PDF</string>
+    <string name="selected_page">%1$d Selected</string>
+    <string name="loading">Loading</string>
+    <string name="continue_now">Continue Now</string>
 </resources>

gradle/libs.versions.toml

@@ -4,6 +4,7 @@ appcompat = "1.7.1"
 agp = "8.10.1"
 fragmentKtx = "1.8.9"
 glide = "5.0.4"
+jp2forandroid = "1.0.4"
 kotlin = "2.0.21"
 ksp = "2.0.21-1.0.27"
 coreKtx = "1.17.0"
@@ -30,6 +31,7 @@ androidx-room-compiler = { group = "androidx.room", name = "room-compiler", vers
 androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room_version" }
 androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room_version" }
 glide = { module = "com.github.bumptech.glide:glide", version.ref = "glide" }
+jp2forandroid = { module = "com.github.Tgo1014:JP2ForAndroid", version.ref = "jp2forandroid" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
 androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }