添加删除文件操作，优化收藏文件操作，优化viewmodel数据共享。

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

@@ -0,0 +1,17 @@
+package com.all.pdfreader.pro.app.model
+
+/**
+ * 文件删除结果封装类
+ */
+data class DeleteResult(
+    val success: Boolean,
+    val errorMessage: String? = null,
+    val deletedFiles: Int = 0,
+    val deletedSize: Long = 0
+) {
+    companion object {
+        fun success(deletedFiles: Int = 1, deletedSize: Long = 0) =
+            DeleteResult(true, null, deletedFiles, deletedSize)
+        fun failure(message: String) = DeleteResult(false, message, 0, 0)
+    }
+}

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

@@ -2,4 +2,6 @@ package com.all.pdfreader.pro.app.model
 
 sealed class FileActionEvent {
     data class Rename(val renameResult: RenameResult) : FileActionEvent()
+    data class Delete(val deleteResult: DeleteResult) : FileActionEvent()
+    data class Favorite(val isFavorite: Boolean) : FileActionEvent()
 }

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

@@ -66,7 +66,7 @@ class MainActivity : BaseActivity(), PermissionDialogFragment.PermissionCallback
         updateSelectedNav(activeFragment)
     }
 
-    private fun initObserve(){
+    private fun initObserve() {
         //观察其余操作
         viewModel.fileActionEvent.observe(this) { event ->
             when (event) {
@@ -77,6 +77,22 @@ class MainActivity : BaseActivity(), PermissionDialogFragment.PermissionCallback
                         showToast(event.renameResult.errorMessage.toString())
                     }
                 }
+
+                is FileActionEvent.Delete -> {
+                    if (event.deleteResult.success) {
+                        showToast(getString(R.string.delete_successfully))
+                    } else {
+                        showToast(event.deleteResult.errorMessage.toString())
+                    }
+                }
+
+                is FileActionEvent.Favorite -> {
+                    if (event.isFavorite) {
+                        showToast(getString(R.string.added_to_favorites))
+                    } else {
+                        showToast(getString(R.string.removed_from_favorites))
+                    }
+                }
             }
         }
     }

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

@@ -59,19 +59,6 @@ class PdfViewActivity : BaseActivity(), OnLoadCompleteListener, OnPageChangeList
                 finish()
             }
         }
-        //观察其余操作
-        viewModel.fileActionEvent.observe(this) { event ->
-            logDebug("fileActionEvent响应 $event")
-            when (event) {
-                is FileActionEvent.Rename -> {
-                    if (event.renameResult.success) {
-                        showToast(getString(R.string.rename_successfully))
-                    } else {
-                        showToast(event.renameResult.errorMessage.toString())
-                    }
-                }
-            }
-        }
     }
 
     private fun loadPdf() {

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

@@ -0,0 +1,67 @@
+package com.all.pdfreader.pro.app.ui.dialog
+
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.core.graphics.drawable.toDrawable
+import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.activityViewModels
+import com.all.pdfreader.pro.app.R
+import com.all.pdfreader.pro.app.databinding.DialogDeleteBinding
+import com.all.pdfreader.pro.app.room.entity.PdfDocumentEntity
+import com.all.pdfreader.pro.app.viewmodel.PdfViewModel
+
+class DeleteDialogFragment() : DialogFragment() {
+
+    private lateinit var binding: DialogDeleteBinding
+    private val viewModel: PdfViewModel by activityViewModels()
+    private lateinit var pdfDocument: PdfDocumentEntity
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View? {
+        binding = DialogDeleteBinding.inflate(layoutInflater)
+        return binding.root
+    }
+
+    override fun onStart() {
+        super.onStart()
+        dialog?.window?.apply {
+            // 去掉系统默认的背景 padding
+            setBackgroundDrawable(Color.TRANSPARENT.toDrawable())
+            // 设置宽度为全屏减去 16dp
+            val margin = resources.getDimensionPixelSize(R.dimen.dialog_margin) // 16dp
+            val width = resources.displayMetrics.widthPixels - margin * 2
+            setLayout(width, ViewGroup.LayoutParams.WRAP_CONTENT)
+        }
+    }
+
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        viewModel.pdfDocument.value?.let {
+            pdfDocument = it
+            setupOnClick()
+        } ?: run {
+            showToast(getString(R.string.file_not))
+            dismiss()
+        }
+    }
+
+    private fun setupOnClick() {
+        binding.okBtn.setOnClickListener {
+            viewModel.deleteFile(pdfDocument.filePath)
+            dismiss()
+        }
+        binding.cancelBtn.setOnClickListener {
+            dismiss()
+        }
+    }
+
+    private fun showToast(message: String) {
+        Toast.makeText(requireActivity(), message, Toast.LENGTH_SHORT).show()
+    }
+}

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

@@ -28,7 +28,6 @@ import java.io.File
 class ListMoreDialogFragment(val filePath: String) : BottomSheetDialogFragment() {
 
     private lateinit var binding: DialogListMoreBinding
-    private val pdfRepository = PdfRepository.getInstance()
     private val viewModel: PdfViewModel by activityViewModels()
     private lateinit var pdfDocument: PdfDocumentEntity
     private var isFavorite: Boolean = false
@@ -54,7 +53,6 @@ class ListMoreDialogFragment(val filePath: String) : BottomSheetDialogFragment()
                 isFavorite = pdfDocument.isFavorite
                 initUi()
                 setupOnClick()
-
             } ?: run {
                 showToast(getString(R.string.file_not))
                 dismiss()
@@ -84,28 +82,16 @@ class ListMoreDialogFragment(val filePath: String) : BottomSheetDialogFragment()
         binding.collectBtn.setClickWithAnimation(duration = 250) {
             isFavorite = !isFavorite
             updateCollectUi(isFavorite)
-            saveCollectState(isFavorite)
+            viewModel.saveCollectState(pdfDocument.filePath, isFavorite)
-        }
-        binding.renameFileBtn.setOnClickListener {
-            RenameDialogFragment(pdfDocument.filePath).show(
-                parentFragmentManager,
-                "ListMoreDialogFragment"
-            )
             dismiss()
         }
+        binding.renameFileBtn.setOnClickListener {
+            RenameDialogFragment().show(parentFragmentManager, "ListMoreDialogFragment")
+            dismiss()
         }
-
+        binding.deleteFileBtn.setOnClickListener {
-    private fun saveCollectState(b: Boolean) {
+            DeleteDialogFragment().show(parentFragmentManager, "DeleteDialogFragment")
-        pdfDocument = pdfDocument.copy(
+            dismiss()
-            isFavorite = b
-        )
-        lifecycleScope.launch {
-            pdfRepository.updateFavoriteStatus(pdfDocument.filePath, pdfDocument.isFavorite)
-        }
-        if (b) {
-            showToast(getString(R.string.added_to_favorites))
-        } else {
-            showToast(getString(R.string.removed_from_favorites))
         }
     }
 

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

@@ -19,9 +19,7 @@ import com.all.pdfreader.pro.app.util.FileUtils
 import com.all.pdfreader.pro.app.viewmodel.PdfViewModel
 import java.io.File
 
-class RenameDialogFragment(
+class RenameDialogFragment() : DialogFragment() {
-    private val filePath: String
-) : DialogFragment() {
 
     private lateinit var binding: DialogRenameFileBinding
     private val viewModel: PdfViewModel by activityViewModels()
@@ -49,9 +47,7 @@ class RenameDialogFragment(
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-
+        viewModel.pdfDocument.value?.let {
-        viewModel.pdfDocument.observe(this) { document ->
-            document?.let {
             pdfDocument = it
             initView()
             setupOnClick()
@@ -60,8 +56,6 @@ class RenameDialogFragment(
             dismiss()
         }
     }
-        viewModel.getPDFDocument(filePath)
-    }
 
     private fun initView() {
         binding.etName.showKeyboard()

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

@@ -0,0 +1,264 @@
+package com.all.pdfreader.pro.app.util
+
+import android.content.Context
+import android.net.Uri
+import android.provider.MediaStore
+import android.util.Log
+import com.all.pdfreader.pro.app.PRApp
+import com.all.pdfreader.pro.app.R
+import com.all.pdfreader.pro.app.model.DeleteResult
+import com.all.pdfreader.pro.app.util.FileUtils.formatFileSize
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.io.File
+import kotlin.collections.forEach
+
+object FileDeleteUtil {
+    /**
+     * 删除文件（同步版本）- 功能完善的删除方法
+     *
+     * @param file 要删除的文件
+     * @param deleteEmptyParentDirs 是否删除空的父目录（默认false）
+     * @param dryRun 是否只模拟删除不实际执行（默认false）
+     * @return DeleteResult对象，包含删除结果和详细信息
+     */
+    fun deleteFile(
+        file: File,
+        deleteEmptyParentDirs: Boolean = false,
+        dryRun: Boolean = false
+    ): DeleteResult {
+        if (!file.exists()) {
+            Log.e("ocean", "❌ File does not exist: ${file.path}")
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_file_not_exist))
+        }
+
+        if (!file.canWrite()) {
+            Log.e("ocean", "❌ No write permission for file: ${file.path}")
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_no_write_permission))
+        }
+
+        // 安全检查：防止删除重要系统目录
+        if (isProtectedPath(file)) {
+            Log.e("ocean", "❌ Cannot delete protected path: ${file.path}")
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_cannot_delete_protected_path))
+        }
+
+        // 如果是目录，检查是否为空（避免误删非空目录）
+        if (file.isDirectory) {
+            val files = file.listFiles()
+            if (!files.isNullOrEmpty()) {
+                Log.e("ocean", "❌ Directory is not empty: ${file.path} (${files.size} items)")
+                return DeleteResult.failure(PRApp.getStringRes(R.string.error_directory_not_empty))
+            }
+        }
+
+        // 计算要删除的文件大小
+        val fileSize = file.length()
+
+        if (dryRun) {
+            Log.d("ocean", "🔍 Dry run - would delete: ${file.path} (${formatFileSize(fileSize)})")
+            return DeleteResult.success(1, fileSize)
+        }
+
+        return try {
+            val success = file.delete()
+            if (success) {
+                Log.d(
+                    "ocean",
+                    "✅ File deleted successfully: ${file.path} (${formatFileSize(fileSize)})"
+                )
+
+                // 如果需要，删除空的父目录
+                if (deleteEmptyParentDirs) {
+                    deleteEmptyParentDirectories(file.parentFile)
+                }
+
+                DeleteResult.success(1, fileSize)
+            } else {
+                Log.e("ocean", "❌ Failed to delete file: ${file.path}")
+                DeleteResult.failure(PRApp.getStringRes(R.string.error_failed_delete_file))
+            }
+        } catch (e: SecurityException) {
+            Log.e("ocean", "❌ Security exception while deleting: ${e.message}")
+            DeleteResult.failure(PRApp.getStringRes(R.string.error_permission_delete_file))
+        } catch (e: Exception) {
+            Log.e("ocean", "❌ Exception while deleting file: ${e.message}")
+            DeleteResult.failure(
+                PRApp.getStringRes(
+                    R.string.error_file_delete_failed,
+                    e.message.toString()
+                )
+            )
+        }
+    }
+
+    /**
+     * 删除文件（异步版本）- 功能完善的删除方法
+     *
+     * @param file 要删除的文件
+     * @param deleteEmptyParentDirs 是否删除空的父目录（默认false）
+     * @param dryRun 是否只模拟删除不实际执行（默认false）
+     * @return DeleteResult对象，包含删除结果和详细信息
+     */
+    suspend fun deleteFileAsync(
+        file: File,
+        deleteEmptyParentDirs: Boolean = false,
+        dryRun: Boolean = false
+    ): DeleteResult =
+        withContext(Dispatchers.IO) {
+            deleteFile(file, deleteEmptyParentDirs, dryRun)
+        }
+
+    /**
+     * 批量删除文件
+     *
+     * @param files 要删除的文件列表
+     * @param deleteEmptyParentDirs 是否删除空的父目录（默认false）
+     * @param dryRun 是否只模拟删除不实际执行（默认false）
+     * @return DeleteResult对象，包含总体删除结果
+     */
+    fun deleteFiles(
+        files: List<File>,
+        deleteEmptyParentDirs: Boolean = false,
+        dryRun: Boolean = false
+    ): DeleteResult {
+        if (files.isEmpty()) {
+            return DeleteResult.success(0, 0)
+        }
+
+        var totalDeleted = 0
+        var totalSize = 0L
+        val errors = mutableListOf<String>()
+
+        files.forEach { file ->
+            val result = deleteFile(file, deleteEmptyParentDirs, dryRun)
+            if (result.success) {
+                totalDeleted += result.deletedFiles
+                totalSize += result.deletedSize
+            } else {
+                errors.add("${file.name}: ${result.errorMessage}")
+            }
+        }
+
+        return if (errors.isEmpty()) {
+            DeleteResult.success(totalDeleted, totalSize)
+        } else {
+            val error = "\n${errors.joinToString("\n")}"
+            DeleteResult.failure(PRApp.getStringRes(R.string.error_some_files_not_deleted, error))
+        }
+    }
+
+    /**
+     * 删除目录及其所有内容（递归删除）
+     *
+     * @param directory 要删除的目录
+     * @param dryRun 是否只模拟删除不实际执行（默认false）
+     * @return DeleteResult对象，包含删除结果
+     */
+    fun deleteDirectoryRecursive(directory: File, dryRun: Boolean = false): DeleteResult {
+        if (!directory.exists()) {
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_directory_does_not_exist))
+        }
+
+        if (!directory.isDirectory) {
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_path_not_directory))
+        }
+
+        if (isProtectedPath(directory)) {
+            return DeleteResult.failure(PRApp.getStringRes(R.string.error_cannot_delete_protected_directory))
+        }
+
+        var deletedCount = 0
+        var deletedSize = 0L
+
+        // 先删除目录下的所有文件和子目录
+        directory.listFiles()?.forEach { file ->
+            val result = if (file.isDirectory) {
+                deleteDirectoryRecursive(file, dryRun)
+            } else {
+                deleteFile(file, false, dryRun)
+            }
+
+            if (result.success) {
+                deletedCount += result.deletedFiles
+                deletedSize += result.deletedSize
+            }
+        }
+
+        // 最后删除空目录本身
+        val dirResult = deleteFile(directory, false, dryRun)
+        if (dirResult.success) {
+            deletedCount += 1
+        }
+
+        return DeleteResult.success(deletedCount, deletedSize)
+    }
+
+    /**
+     * 检查是否为受保护的路径（防止误删系统文件）
+     */
+    private fun isProtectedPath(file: File): Boolean {
+        val protectedPaths = listOf(
+            "/system",
+            "/data",
+            "/vendor",
+            "/sbin",
+            "/etc",
+            "/dev",
+            "/proc",
+            "/sys",
+            "/root",
+            "/acct",
+            "/mnt",
+            "/storage/emulated/0/Android",
+            "/storage/emulated/0/.android_secure"
+        )
+
+        val absolutePath = file.absolutePath
+        return protectedPaths.any { protectedPath ->
+            absolutePath.startsWith(protectedPath)
+        }
+    }
+
+    /**
+     * 删除空的父目录（向上递归）
+     */
+    private fun deleteEmptyParentDirectories(directory: File?) {
+        directory?.let { dir ->
+            if (dir.exists() && dir.isDirectory && dir.listFiles()?.isEmpty() == true) {
+                val parent = dir.parentFile
+                if (dir.delete()) {
+                    Log.d("ocean", "✅ Deleted empty parent directory: ${dir.path}")
+                    deleteEmptyParentDirectories(parent)
+                }
+            }
+        }
+    }
+
+    /**
+     * 安全删除文件到回收站（如果系统支持）
+     *
+     * @param context 上下文
+     * @param file 要删除的文件
+     * @return DeleteResult对象
+     */
+    fun moveToTrash(context: Context, file: File): DeleteResult {
+        return try {
+            // Android 10+ 支持系统回收站
+            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
+                MediaStore.createTrashRequest(
+                    context.contentResolver,
+                    listOf(Uri.fromFile(file)),
+                    true
+                )
+                // 注意：这里需要Activity来启动IntentSender
+                DeleteResult.success(1, file.length())
+            } else {
+                // 低版本直接删除
+                deleteFile(file)
+            }
+        } catch (e: Exception) {
+            DeleteResult.failure("Failed to move file to trash: ${e.message}")
+        }
+    }
+}

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

@@ -35,7 +35,6 @@ object FileUtils {
         // 外部存储根目录（需要权限）
         if (StoragePermissionHelper.hasBasicStoragePermission(context)) {
             Log.d("ocean", "📂 扫描外部存储目录...")
-
             // 扫描常见的PDF存储目录
             val externalStorage = android.os.Environment.getExternalStorageDirectory()
             scanCommonDirectories(externalStorage, pdfFiles)
@@ -431,7 +430,11 @@ object FileUtils {
             RenameResult.failure(PRApp.getStringRes(R.string.error_insufficient_permission))
         } catch (e: Exception) {
             Log.e("ocean", "❌ File rename exception: ${e.message}")
-            RenameResult.failure(PRApp.getStringRes(R.string.error_file_rename_exception, e.message.toString()))
+            RenameResult.failure(
+                PRApp.getStringRes(
+                    R.string.error_file_rename_exception, e.message.toString()
+                )
+            )
         }
     }
 
@@ -516,7 +519,7 @@ object FileUtils {
             }
             tempFile
         } catch (e: Exception) {
-            Log.e("ocean", "无法获取文件: ${e.message}", e)
+//            Log.e("ocean", "无法获取文件: ${e.message}", e)
             null
         }
     }

app/src/main/java/com/all/pdfreader/pro/app/viewmodel/PdfViewModel.kt

@@ -8,9 +8,12 @@ import androidx.lifecycle.viewModelScope
 import com.all.pdfreader.pro.app.model.FileActionEvent
 import com.all.pdfreader.pro.app.room.entity.PdfDocumentEntity
 import com.all.pdfreader.pro.app.room.repository.PdfRepository
+import com.all.pdfreader.pro.app.util.FileDeleteUtil
 import com.all.pdfreader.pro.app.util.FileUtils
 import com.all.pdfreader.pro.app.util.LogUtil
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import java.io.File
 
 class PdfViewModel : ViewModel() {
@@ -23,7 +26,6 @@ class PdfViewModel : ViewModel() {
     private val _fileActionEvent = MutableLiveData<FileActionEvent>()
     val fileActionEvent: LiveData<FileActionEvent> = _fileActionEvent
 
-
     fun getPDFDocument(filePath: String) {
         viewModelScope.launch {
             val document = pdfRepository.getDocumentByPath(filePath)
@@ -37,7 +39,10 @@ class PdfViewModel : ViewModel() {
         viewModelScope.launch {
             val oldFile = File(filePath)
             val renameResult = FileUtils.renameFile(oldFile, newName)
-            Log.d("ocean", "renamePdf->oldFile: $oldFile, newName=$newName, renameResult=$renameResult")
+            Log.d(
+                "ocean",
+                "renamePdf->oldFile: $oldFile, newName=$newName, renameResult=$renameResult"
+            )
             if (renameResult.success) {//修改成功更新数据库
                 val finalName = if (newName.contains('.')) {
                     // 用户提供了后缀，使用用户的
@@ -56,7 +61,34 @@ class PdfViewModel : ViewModel() {
                 Log.d("ocean", "renamePdf->newFilePath: $newFilePath, finalName=$finalName")
                 pdfRepository.updateFilePathAndFileName(filePath, newFilePath, finalName)
             }
+
+            withContext(Dispatchers.Main) {
                 _fileActionEvent.postValue(FileActionEvent.Rename(renameResult))
             }
         }
+    }
+
+    fun deleteFile(filePath: String) {
+        viewModelScope.launch {
+            val file = File(filePath)
+            val deleteResult = FileDeleteUtil.deleteFile(file)
+            Log.d("ocean", "deleteFile->file: $file, deleteResult=$deleteResult")
+            if (deleteResult.success) {
+                Log.d("ocean", "文件已删除，清除数据库数据")
+                pdfRepository.deleteDocument(filePath)
+            }
+            withContext(Dispatchers.Main) {
+                _fileActionEvent.postValue(FileActionEvent.Delete(deleteResult))
+            }
+        }
+    }
+
+    fun saveCollectState(filePath: String, isFavorite: Boolean) {
+        viewModelScope.launch {
+            pdfRepository.updateFavoriteStatus(filePath, isFavorite)
+            withContext(Dispatchers.Main) {
+                _fileActionEvent.postValue(FileActionEvent.Favorite(isFavorite))
+            }
+        }
+    }
 }

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

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- 按下状态 -->
+    <item android:state_pressed="true">
+        <shape android:shape="rectangle">
+            <solid android:color="#ED343B"/> <!-- 按下颜色：深一点 -->
+            <corners android:radius="12dp"/>
+        </shape>
+    </item>
+
+    <!-- 默认状态 -->
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#F1494F"/> <!-- 默认颜色 -->
+            <corners android:radius="12dp"/>
+        </shape>
+    </item>
+
+</selector>

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

@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/dr_rounded_corner_12_bg_white"
+    android:orientation="vertical">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="24dp"
+        android:fontFamily="@font/poppins_semibold"
+        android:text="@string/delete_file_title"
+        android:textColor="@color/black"
+        android:textSize="18sp" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="24dp"
+        android:layout_marginEnd="24dp"
+        android:layout_marginBottom="8dp"
+        android:fontFamily="@font/poppins_regular"
+        android:text="@string/delete_file_desc"
+        android:textColor="@color/black_80"
+        android:textSize="16sp" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:padding="24dp">
+
+        <LinearLayout
+            android:id="@+id/cancelBtn"
+            android:layout_width="0dp"
+            android:layout_height="48dp"
+            android:layout_marginEnd="8dp"
+            android:layout_weight="1"
+            android:background="@drawable/dr_cancel_btn_bg"
+            android:gravity="center">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:fontFamily="@font/poppins_semibold"
+                android:text="@string/cancel"
+                android:textColor="@color/black_60"
+                android:textSize="16sp" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/okBtn"
+            android:layout_width="0dp"
+            android:layout_height="48dp"
+            android:layout_marginStart="8dp"
+            android:layout_weight="1"
+            android:background="@drawable/dr_click_btn_red_bg"
+            android:gravity="center">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:fontFamily="@font/poppins_semibold"
+                android:text="@string/delete"
+                android:textColor="@color/white"
+                android:textSize="16sp" />
+        </LinearLayout>
+
+    </LinearLayout>
+
+</LinearLayout>

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

@@ -269,6 +269,7 @@
         </LinearLayout>
 
         <LinearLayout
+            android:id="@+id/deleteFileBtn"
             android:layout_width="match_parent"
             android:layout_height="48dp"
             android:gravity="center_vertical"

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

@@ -46,6 +46,7 @@
     <string name="added_to_favorites">Added to Favorite</string>
     <string name="removed_from_favorites">Removed from Favorites</string>
     <string name="delete_file">Delete File</string>
+    <string name="delete">Delete</string>
     <string name="set_password">Set Password</string>
     <string name="remove_password">Remove Password</string>
     <string name="duplicate_file">Duplicate File</string>
@@ -57,6 +58,7 @@
     <string name="name_already_exists">A file with the same name already exists</string>
     <string name="name_start_end_space">File name cannot start or end with space</string>
     <string name="rename_successfully">Rename successfully</string>
+    <string name="delete_successfully">Delete successfully</string>
     <string name="error_file_not_exist">File does not exist</string>
     <string name="error_no_write_permission">No write permission for file</string>
     <string name="error_invalid_file_name">Invalid file name</string>
@@ -65,4 +67,15 @@
     <string name="error_file_rename_failed">File rename failed</string>
     <string name="error_insufficient_permission">Insufficient permission to rename file</string>
     <string name="error_file_rename_exception">File rename exception: %1$s</string>
+    <string name="error_cannot_delete_protected_path">Cannot delete protected system path</string>
+    <string name="error_directory_not_empty">Directory is not empty</string>
+    <string name="error_failed_delete_file">Failed to delete file</string>
+    <string name="error_permission_delete_file">Insufficient permission to delete file</string>
+    <string name="error_file_delete_failed">Delete operation failed: %1$s</string>
+    <string name="error_some_files_not_deleted">Some files could not be deleted: %1$s</string>
+    <string name="error_directory_does_not_exist">Directory does not exist</string>
+    <string name="error_path_not_directory">Path is not a directory</string>
+    <string name="error_cannot_delete_protected_directory">Cannot delete protected system directory</string>
+    <string name="delete_file_title">Delete this file permanently?</string>
+    <string name="delete_file_desc">Deleting this file will remove it permanently from your device.</string>
 </resources>