图片转pdf，优化拆分功能，拆分加密pdf流程。

app/build.gradle.kts

@@ -63,4 +63,7 @@ dependencies {
     implementation(libs.pdfbox.android)
     implementation(libs.jp2forandroid)
     implementation(libs.flexbox)
+    implementation(libs.pictureselector)
+    implementation(libs.ucrop)
+    implementation(libs.compress)
 }

app/proguard-rules.pro

@@ -20,4 +20,9 @@
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
 
--keep class com.shockwave.**
+-keep class com.shockwave.**
+-keep class com.luck.picture.lib.** { *; }
+-keep class com.luck.lib.camerax.** { *; }
+-dontwarn com.yalantis.ucrop**
+-keep class com.yalantis.ucrop** { *; }
+-keep interface com.yalantis.ucrop** { *; }

app/src/main/AndroidManifest.xml

@@ -4,8 +4,15 @@
     android:theme="@style/Theme.PDFReaderPro"
     tools:ignore="DiscouragedApi,LockedOrientationActivity,RedundantLabel">
 
-    <!-- Android 11+ 存储权限 -->
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.VIBRATE"/>
 
     <!-- Android 13+ 媒体权限 -->
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
@@ -107,5 +114,16 @@
                 android:resource="@xml/file_paths" />
         </provider>
     </application>
+    <queries package="${applicationId}">
+        <intent>
+            <action android:name="android.media.action.IMAGE_CAPTURE">
 
+            </action>
+        </intent>
+        <intent>
+            <action android:name="android.media.action.ACTION_VIDEO_CAPTURE">
+
+            </action>
+        </intent>
+    </queries>
 </manifest>

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

@@ -10,6 +10,7 @@ import android.view.View
 import androidx.activity.OnBackPressedCallback
 import androidx.lifecycle.lifecycleScope
 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.PdfPickerSource
@@ -105,7 +106,7 @@ class PdfResultActivity : BaseActivity() {
                     finish()
                     return
                 }
-            } else if (source == PdfPickerSource.MERGE) {
+            } else if (source == PdfPickerSource.MERGE || source == PdfPickerSource.TO_IMAGES) {
                 if (inputFile.isEmpty()) {
                     showToast(getString(R.string.pdf_loading_failed))
                     finish()
@@ -229,6 +230,34 @@ class PdfResultActivity : BaseActivity() {
                     )
                     resultList.add(result)
                 }
+            } else if(source == PdfPickerSource.TO_IMAGES){
+                val inputFiles: List<File> = inputFile.map { path -> File(path) }
+                val outputDir = File(
+                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS),
+                    "PDFReaderPro/img2Pdf"
+                ).apply { if (!exists()) mkdirs() }
+                val outputFileName =
+                    getString(R.string.app_name) + "_" + System.currentTimeMillis()
+                        .toUnderscoreDateTime() + ".pdf"
+                PdfUtils.imgToPdfFilesSafe(
+                    inputFiles = inputFiles,
+                    outputDir = outputDir,
+                    outputFileName = outputFileName,
+                    onProgress = { current, total ->
+                        logDebug("current->$current total->$total")
+                        val progressPercent = current * 100 / total
+                        logDebug("progressPercent->$progressPercent")
+                        runOnUiThread {
+                            binding.progressBar.progress = progressPercent
+                            binding.progressTv.text = "$progressPercent"
+                        }
+                    })?.let { resultFile ->
+                    val thumbnails = generateFastThumbnail(this@PdfResultActivity, resultFile)
+                    val result = PdfSplitResultItem(resultFile.absolutePath, thumbnails, false)
+                    pdfScanner.addNewPdfToDatabase(result.filePath, result.thumbnailPath) {
+                        resultList.add(result)
+                    }
+                }
             }
             withContext(Dispatchers.Main) {
                 binding.processingLayout.visibility = View.GONE

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

@@ -16,9 +16,11 @@ import com.all.pdfreader.pro.app.model.PdfSelectedPagesItem
 import com.all.pdfreader.pro.app.model.RenameType
 import com.all.pdfreader.pro.app.ui.adapter.SplitPdfAdapter
 import com.all.pdfreader.pro.app.ui.adapter.SplitSelectedPdfAdapter
+import com.all.pdfreader.pro.app.ui.dialog.PdfPasswordProtectionDialogFragment
 import com.all.pdfreader.pro.app.ui.dialog.PromptDialogFragment
 import com.all.pdfreader.pro.app.ui.dialog.RenameDialogFragment
 import com.all.pdfreader.pro.app.util.AppUtils.setOnSingleClickListener
+import com.all.pdfreader.pro.app.util.FileUtils.isPdfEncrypted
 import com.all.pdfreader.pro.app.util.FileUtils.toUnderscoreDateTime
 import com.all.pdfreader.pro.app.util.PdfUtils
 import com.gyf.immersionbar.ImmersionBar
@@ -149,6 +151,24 @@ class SplitPdfActivity : BaseActivity() {
     }
 
     private fun initSplitData(file: File) {
+        lifecycleScope.launch {
+            // 是否存在密码
+            val isEncrypted = withContext(Dispatchers.IO) {
+                isPdfEncrypted(file)
+            }
+            if (isEncrypted) {
+                PdfPasswordProtectionDialogFragment(file, onOkClick = { password ->
+                    initSplitDataWithPassword(file, password)
+                }, onCancelClick = {
+                    finish()
+                }).show(supportFragmentManager, TAG)
+            } else {
+                initSplitDataWithPassword(file)
+            }
+        }
+    }
+
+    private fun initSplitDataWithPassword(file: File, password: String? = null) {
         lifecycleScope.launch {
             splitList.clear()
             // 先切换到 IO 线程执行删除，等待完成
@@ -157,7 +177,11 @@ class SplitPdfActivity : BaseActivity() {
             }
             // 删除完成后，开始收集数据
             var firstPageLoaded = false
-            PdfUtils.splitPdfToPageItemsFlow(this@SplitPdfActivity, file).collect { pageItem ->
+            PdfUtils.splitPdfToPageItemsFlow(
+                context = this@SplitPdfActivity,
+                inputFile = file,
+                password = password
+            ).collect { pageItem ->
                 logDebug("splitPdfToPageItemsFlow pageItem->$pageItem")
                 if (splitList.size <= pageItem.pageIndex) {
                     splitList.add(pageItem)

app/src/main/java/com/all/pdfreader/pro/app/ui/fragment/BaseFrag.kt

@@ -9,6 +9,7 @@ import androidx.fragment.app.Fragment
 import com.all.pdfreader.pro.app.databinding.FragmentFavoriteBinding
 import com.all.pdfreader.pro.app.room.repository.PdfRepository
 import com.all.pdfreader.pro.app.sp.AppStore
+import com.all.pdfreader.pro.app.util.ToastUtils
 
 abstract class BaseFrag : Fragment() {
     protected abstract val TAG: String
@@ -59,6 +60,10 @@ abstract class BaseFrag : Fragment() {
         Log.w("ocean", "$TAG: $message")
     }
 
+    protected fun showToast(message: String) {
+        ToastUtils.show(requireActivity(), message)
+    }
+
     //获取数据库实例
     protected fun getRepository(): PdfRepository {
         return PdfRepository.getInstance()

app/src/main/java/com/all/pdfreader/pro/app/ui/fragment/ToolsFrag.kt

@@ -1,15 +1,39 @@
 package com.all.pdfreader.pro.app.ui.fragment
 
+import android.content.Context
+import android.net.Uri
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.net.toUri
 import androidx.fragment.app.Fragment
+import com.all.pdfreader.pro.app.PRApp
+import com.all.pdfreader.pro.app.R
 import com.all.pdfreader.pro.app.databinding.FragmentToolsBinding
 import com.all.pdfreader.pro.app.model.PdfPickerSource
 import com.all.pdfreader.pro.app.ui.act.PdfPickerActivity
+import com.all.pdfreader.pro.app.ui.act.PdfResultActivity
+import com.all.pdfreader.pro.app.util.GlideEngine
+import com.luck.picture.lib.basic.PictureSelector
+import com.luck.picture.lib.config.PictureMimeType
+import com.luck.picture.lib.config.SelectMimeType
+import com.luck.picture.lib.config.SelectModeConfig
+import com.luck.picture.lib.engine.CompressFileEngine
+import com.luck.picture.lib.entity.LocalMedia
+import com.luck.picture.lib.interfaces.OnKeyValueResultCallbackListener
+import com.luck.picture.lib.interfaces.OnMediaEditInterceptListener
+import com.luck.picture.lib.interfaces.OnResultCallbackListener
+import com.luck.picture.lib.style.PictureSelectorStyle
+import com.luck.picture.lib.style.SelectMainStyle
+import com.luck.picture.lib.utils.DateUtils
+import com.yalantis.ucrop.UCrop
+import top.zibin.luban.Luban
+import top.zibin.luban.OnNewCompressListener
+import java.io.File
 
-class ToolsFrag : Fragment() {
+class ToolsFrag : BaseFrag() {
+    override val TAG: String = "ToolsFrag"
     private lateinit var binding: FragmentToolsBinding
 
     override fun onCreateView(
@@ -41,5 +65,110 @@ class ToolsFrag : Fragment() {
             val intent = PdfPickerActivity.createIntent(requireActivity(), PdfPickerSource.UNLOCK)
             startActivity(intent)
         }
+        binding.imgToPdfBtn.setOnClickListener {
+            openImagePicker()
+        }
+    }
+
+    private fun openImagePicker() {
+        val selectorStyle = PictureSelectorStyle().apply {
+            selectMainStyle = SelectMainStyle().apply {
+                isSelectNumberStyle = true
+                isPreviewSelectNumberStyle = true
+                selectBackground = R.drawable.num_checkbox_selector
+            }
+        }
+        PictureSelector.create(this)
+            .openGallery(SelectMimeType.ofImage())
+            .setSelectorUIStyle(selectorStyle)
+            .setImageEngine(GlideEngine.createGlideEngine())
+            .setImageSpanCount(3)
+            .isGif(false)
+            .isFastSlidingSelect(true)
+            .setSelectionMode(SelectModeConfig.MULTIPLE)
+            .setMaxSelectNum(50)
+
+            .setCompressEngine(object : CompressFileEngine {
+                override fun onStartCompress(
+                    context: Context?,
+                    source: ArrayList<Uri?>?,
+                    call: OnKeyValueResultCallbackListener?
+                ) {
+                    Luban.with(context)
+                        .load(source)
+                        .ignoreBy(100)
+                        .setCompressListener(object : OnNewCompressListener {
+                            override fun onStart() {
+
+                            }
+
+                            override fun onSuccess(
+                                source: String?,
+                                compressFile: File?
+                            ) {
+                                call?.onCallback(source, compressFile?.absolutePath)
+                            }
+
+                            override fun onError(source: String?, e: Throwable?) {
+                                call?.onCallback(source, null)
+                            }
+                        })
+                        .launch()
+                }
+            })
+            .setEditMediaInterceptListener(object : OnMediaEditInterceptListener {
+                override fun onStartMediaEdit(
+                    fragment: Fragment, currentLocalMedia: LocalMedia, requestCode: Int
+                ) {
+                    val currentEditPath = currentLocalMedia.getAvailablePath()
+                    val inputUri = if (PictureMimeType.isContent(currentEditPath)) {
+                        currentEditPath.toUri()
+                    } else {
+                        Uri.fromFile(File(currentEditPath))
+                    }
+                    val destinationUri = Uri.fromFile(
+                        File(
+                            getSandboxPath(), DateUtils.getCreateFileName("CROP_") + ".jpeg"
+                        )
+                    )
+                    val uCrop = UCrop.of<Any>(inputUri, destinationUri)
+                    val buildOptions = UCrop.Options().apply {
+                        isDarkStatusBarBlack(true)
+                    }
+                    uCrop.withOptions(buildOptions)
+                    uCrop.start(requireActivity(), fragment, requestCode)
+                }
+
+            }).forResult(object : OnResultCallbackListener<LocalMedia> {
+                override fun onResult(result: ArrayList<LocalMedia>) {
+                    logDebug("forResult ->${result.size}")
+                    if (result.isNotEmpty()) {
+                        // result 中可能有带裁剪的 Uri 或原图 Uri
+                        // 取出路径列表
+                        val paths = result.mapNotNull { media ->
+                            media.availablePath
+                        }
+                        if (paths.isEmpty()) {
+                            return
+                        }
+                        val intent = PdfResultActivity.createIntentInputFile(
+                            requireActivity(),
+                            ArrayList(paths),
+                            PdfPickerSource.TO_IMAGES
+                        )
+                        startActivity(intent)
+                    }
+                }
+
+                override fun onCancel() {
+                    logDebug("onCancel")
+                }
+            })
+    }
+
+    fun getSandboxPath(): String {
+        val dir = File(PRApp.getContext().externalCacheDir, "SandboxPdfPro")
+        if (!dir.exists()) dir.mkdirs()
+        return dir.absolutePath
     }
 }

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

@@ -6,7 +6,7 @@ import android.graphics.pdf.PdfRenderer
 import android.net.Uri
 import android.os.ParcelFileDescriptor
 import android.provider.MediaStore
-import android.provider.OpenableColumns  
+import android.provider.OpenableColumns
 import android.util.Log
 import com.all.pdfreader.pro.app.PRApp
 import com.all.pdfreader.pro.app.R
@@ -21,6 +21,7 @@ import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 import com.all.pdfreader.pro.app.model.RenameResult
+import androidx.core.net.toUri
 
 object FileUtils {
 
@@ -330,6 +331,7 @@ object FileUtils {
         val sdf = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.ENGLISH)
         return sdf.format(Date(this))
     }
+
     data class FileInfo(
         val name: String, val size: Long, val uri: Uri
     )
@@ -368,11 +370,12 @@ object FileUtils {
      */
     fun isPdfPasswordCorrect(context: Context, file: File, password: String): Boolean {
         return try {
-            val descriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY)
+            ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).use { descriptor ->
-            val pdfiumCore = PdfiumCore(context)
+                val pdfiumCore = PdfiumCore(context)
-            val doc = pdfiumCore.newDocument(descriptor, password)
+                val doc = pdfiumCore.newDocument(descriptor, password)
-            pdfiumCore.closeDocument(doc)
+                pdfiumCore.closeDocument(doc)
-            true // 没抛异常说明密码正确
+            }
+            true// 没抛异常说明密码正确
         } catch (e: Exception) {
             false // 抛异常说明密码错误
         }
@@ -557,4 +560,28 @@ object FileUtils {
         return newFile
     }
 
+
+    fun uriToFile(context: Context, path: String): File? {
+        return try {
+            if (path.startsWith("content://")) {
+                // 是 content:// Uri，需要拷贝到临时文件
+                val uri = path.toUri()
+                val inputStream = context.contentResolver.openInputStream(uri) ?: return null
+                val tempFile = File(context.cacheDir, "temp_${System.currentTimeMillis()}.jpg")
+                tempFile.outputStream().use { output ->
+                    inputStream.copyTo(output)
+                }
+                inputStream.close()
+                tempFile
+            } else {
+                // 是普通文件路径
+                val file = File(path)
+                if (file.exists()) file else null
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
+
 }

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

@@ -0,0 +1,87 @@
+package com.all.pdfreader.pro.app.util
+
+import android.content.Context
+import android.widget.ImageView
+import com.all.pdfreader.pro.app.R
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.resource.bitmap.CenterCrop
+import com.bumptech.glide.load.resource.bitmap.RoundedCorners
+import com.luck.picture.lib.engine.ImageEngine
+import com.luck.picture.lib.utils.ActivityCompatHelper
+
+class GlideEngine private constructor() : ImageEngine {
+
+    /**
+     * 加载图片
+     */
+    override fun loadImage(context: Context, url: String?, imageView: ImageView) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context)
+            .load(url)
+            .into(imageView)
+    }
+
+    /**
+     * 按指定大小加载图片
+     */
+    override fun loadImage(
+        context: Context,
+        imageView: ImageView,
+        url: String?,
+        maxWidth: Int,
+        maxHeight: Int
+    ) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context)
+            .load(url)
+            .override(maxWidth, maxHeight)
+            .into(imageView)
+    }
+
+    /**
+     * 加载相册目录封面
+     */
+    override fun loadAlbumCover(context: Context, url: String?, imageView: ImageView) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context)
+            .asBitmap()
+            .load(url)
+            .override(180, 180)
+            .sizeMultiplier(0.5f)
+            .transform(CenterCrop(), RoundedCorners(8))
+            .placeholder(R.drawable.engine_image_placeholder)
+            .into(imageView)
+    }
+
+    /**
+     * 加载图片列表图片
+     */
+    override fun loadGridImage(context: Context, url: String?, imageView: ImageView) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context)
+            .load(url)
+            .override(200, 200)
+            .centerCrop()
+            .placeholder(R.drawable.engine_image_placeholder)
+            .into(imageView)
+    }
+
+    override fun pauseRequests(context: Context) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context).pauseRequests()
+    }
+
+    override fun resumeRequests(context: Context) {
+        if (!ActivityCompatHelper.assertValidRequest(context)) return
+        Glide.with(context).resumeRequests()
+    }
+
+    companion object {
+        @JvmStatic
+        fun createGlideEngine(): GlideEngine = InstanceHolder.instance
+    }
+
+    private object InstanceHolder {
+        val instance = GlideEngine()
+    }
+}

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

@@ -2,6 +2,7 @@ package com.all.pdfreader.pro.app.util
 
 import android.content.Context
 import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import android.os.ParcelFileDescriptor
 import android.util.Log
 import androidx.core.graphics.createBitmap
@@ -10,6 +11,11 @@ import com.shockwave.pdfium.PdfiumCore
 import com.tom_roush.pdfbox.io.MemoryUsageSetting
 import com.tom_roush.pdfbox.multipdf.PDFMergerUtility
 import com.tom_roush.pdfbox.pdmodel.PDDocument
+import com.tom_roush.pdfbox.pdmodel.PDPage
+import com.tom_roush.pdfbox.pdmodel.PDPageContentStream
+import com.tom_roush.pdfbox.pdmodel.common.PDRectangle
+import com.tom_roush.pdfbox.pdmodel.graphics.image.JPEGFactory
+import com.tom_roush.pdfbox.pdmodel.graphics.image.LosslessFactory
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
@@ -44,11 +50,17 @@ object PdfUtils {
         inputFile: File,
         dpi: Float = 72f,
         chunkSize: Int = 5,
-        thumbWidth: Int = 200
+        thumbWidth: Int = 200,
+        password: String? = null
     ): Flow<PdfPageItem> = flow {
         val pdfiumCore = PdfiumCore(context)
         ParcelFileDescriptor.open(inputFile, ParcelFileDescriptor.MODE_READ_ONLY).use { fd ->
-            val pdfDocument = pdfiumCore.newDocument(fd)
+            val pdfDocument = if (password.isNullOrEmpty()) {
+                pdfiumCore.newDocument(fd)
+            } else {
+                pdfiumCore.newDocument(fd, password)
+            }
+
             val pageCount = pdfiumCore.getPageCount(pdfDocument)
 
             val pages = List(pageCount) {
@@ -208,4 +220,83 @@ object PdfUtils {
             null
         }
     }
+
+    /**
+     * 图片转 PDF（优化版，安全、快速、低内存）
+     */
+    suspend fun imgToPdfFilesSafe(
+        inputFiles: List<File>,
+        outputDir: File,
+        outputFileName: String,
+        onProgress: ((current: Int, total: Int) -> Unit)? = null
+    ): File? = withContext(Dispatchers.IO) {
+        if (inputFiles.isEmpty()) return@withContext null
+
+        val outputFile = File(outputDir, outputFileName)
+        if (!outputDir.exists()) outputDir.mkdirs()
+
+        var document: PDDocument? = null
+        try {
+            document = PDDocument()
+            val total = inputFiles.size
+
+            inputFiles.forEachIndexed { index, imageFile ->
+                try {
+                    //安全加载压缩后的图片
+                    val options = BitmapFactory.Options().apply {
+                        inPreferredConfig = Bitmap.Config.RGB_565
+                    }
+                    val bitmap = BitmapFactory.decodeFile(imageFile.absolutePath, options)
+                        ?: return@forEachIndexed
+
+                    //按 A4 比例缩放
+                    val a4Width = PDRectangle.A4.width
+                    val a4Height = PDRectangle.A4.height
+                    val imageRatio = bitmap.width.toFloat() / bitmap.height
+                    val pageRatio = a4Width / a4Height
+
+                    val targetWidth: Float
+                    val targetHeight: Float
+                    if (imageRatio > pageRatio) {
+                        targetWidth = a4Width
+                        targetHeight = a4Width / imageRatio
+                    } else {
+                        targetHeight = a4Height
+                        targetWidth = a4Height * imageRatio
+                    }
+
+                    val offsetX = (a4Width - targetWidth) / 2
+                    val offsetY = (a4Height - targetHeight) / 2
+
+                    val page = PDPage(PDRectangle.A4)
+                    document.addPage(page)
+
+                    val pdImage = JPEGFactory.createFromImage(document, bitmap)
+                    PDPageContentStream(document, page).use { contentStream ->
+                        contentStream.drawImage(pdImage, offsetX, offsetY, targetWidth, targetHeight)
+                    }
+
+                    bitmap.recycle()
+
+                } catch (e: OutOfMemoryError) {
+                    e.printStackTrace()
+                    System.gc() // 手动GC一次（极端情况下）
+                    return@forEachIndexed
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                }
+
+                onProgress?.invoke(index + 1, total)
+            }
+
+            document.save(outputFile)
+            outputFile
+
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        } finally {
+            document?.close()
+        }
+    }
 }

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

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape>
+            <size
+                android:width="100dp"
+                android:height="100dp" />
+            <solid android:color="@color/ps_color_light_grey" />
+        </shape>
+    </item>
+    <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@drawable/ps_ic_placeholder" />
+    </item>
+</layer-list>

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/num_oval_normal" android:state_selected="false" />
+    <item android:drawable="@drawable/num_oval_selected" android:state_selected="true" />
+</selector>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval"
+    android:useLevel="false">
+
+    <solid android:color="@color/ps_color_transparent" />
+    <stroke
+        android:width="1dp"
+        android:color="#E0DBDBDB" />
+    <size
+        android:width="18dp"
+        android:height="18dp" />
+</shape>

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval"
+    android:useLevel="false">
+    <solid android:color="@color/btn_sel_on_color" />
+    <size
+        android:width="18dp"
+        android:height="18dp" />
+</shape>

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

@@ -35,4 +35,23 @@
         android:text="@string/unlock_pdf" />
 
 
+    <Button
+        android:id="@+id/imgToPdfBtn"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/img_to_pdf" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <FrameLayout
+            android:id="@+id/fragment_fl"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+
+    </LinearLayout>
+
 </LinearLayout>

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

@@ -113,6 +113,7 @@
     <string name="duplicate_created_successfully">Duplicate file created successfully</string>
     <string name="duplicate_created_failed">Duplicate file created failed</string>
     <string name="processing">Processing…</string>
+    <string name="image_processing">Image Processing…</string>
     <string name="view_model">View Model</string>
     <string name="page_by_page">Page by page</string>
     <string name="color_inversion">color inversion</string>
@@ -154,4 +155,6 @@
     <string name="clear">Clear</string>
     <string name="please_select_a_file">Please select a file</string>
     <string name="unknown_source">Unknown Source</string>
+    <string name="img_to_pdf">Image to PDF</string>
+    <string name="pdf_to_img">PDF to image</string>
 </resources>

gradle/libs.versions.toml

@@ -16,6 +16,7 @@ lifecycleRuntimeKtx = "2.9.2"
 immersionbar = "3.2.2"
 immersionbarKtx = "3.2.2"
 pdfboxAndroid = "2.0.27.0"
+pictureselector = "v3.11.2"
 room_version = "2.7.2"
 swiperefreshlayout = "1.1.0"
 recyclerview = "1.4.0"
@@ -31,6 +32,7 @@ androidx-fragment-ktx = { module = "androidx.fragment:fragment-ktx", version.ref
 androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room_version" }
 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" }
+compress = { module = "io.github.lucksiege:compress", version.ref = "pictureselector" }
 flexbox = { module = "com.google.android.flexbox:flexbox", version.ref = "flexbox" }
 glide = { module = "com.github.bumptech.glide:glide", version.ref = "glide" }
 jp2forandroid = { module = "com.github.Tgo1014:JP2ForAndroid", version.ref = "jp2forandroid" }
@@ -43,9 +45,11 @@ immersionbar-ktx = { group = "com.geyifeng.immersionbar", name = "immersionbar-k
 androidx-swiperefreshlayout = { group = "androidx.swiperefreshlayout", name = "swiperefreshlayout", version.ref = "swiperefreshlayout" }
 androidx-recyclerview = { group = "androidx.recyclerview", name = "recyclerview", version.ref = "recyclerview" }
 pdfbox-android = { module = "com.tom-roush:pdfbox-android", version.ref = "pdfboxAndroid" }
+pictureselector = { module = "io.github.lucksiege:pictureselector", version.ref = "pictureselector" }
 protolite-well-known-types = { group = "com.google.firebase", name = "protolite-well-known-types", version.ref = "protoliteWellKnownTypes" }
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
 androidx-compose-material3 = { group = "androidx.wear.compose", name = "compose-material3", version.ref = "composeMaterial3" }
+ucrop = { module = "io.github.lucksiege:ucrop", version.ref = "pictureselector" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }