...

app/src/main/AndroidManifest.xml

@@ -45,21 +45,24 @@
             android:launchMode="singleTop"
             android:screenOrientation="portrait"
             tools:ignore="DiscouragedApi,LockedOrientationActivity" />
-
-        <!-- <activity -->
-        <!-- android:name="com.artifex.mupdf.viewer.PdfTestActivity" -->
-        <!-- android:exported="false" -->
-        <!-- android:launchMode="singleTop" -->
-        <!-- android:screenOrientation="portrait" -->
-        <!-- tools:ignore="DiscouragedApi,LockedOrientationActivity" /> -->
-
+        <activity
+            android:name=".ui.document.pdf.PdfMergeActivity"
+            android:exported="false"
+            android:launchMode="singleTop"
+            android:screenOrientation="portrait"
+            tools:ignore="DiscouragedApi,LockedOrientationActivity" />
+        <activity
+            android:name=".ui.document.pdf.PdfSelectActivity"
+            android:exported="false"
+            android:launchMode="singleTop"
+            android:screenOrientation="portrait"
+            tools:ignore="DiscouragedApi,LockedOrientationActivity" />
         <activity
             android:name=".ui.document.pdf.PdfActivity"
             android:exported="false"
             android:screenOrientation="portrait"
             android:theme="@style/Theme.PDFViewerScannerWhite"
             tools:ignore="DiscouragedApi,LockedOrientationActivity" />
-
         <activity
             android:name=".ui.document.pdf.PdfLoadingActivity"
             android:exported="false"

app/src/main/java/com/base/pdfviewerscannerwhite/bean/DocumentBean.kt

@@ -4,12 +4,14 @@ import android.net.Uri
 
 data class DocumentBean(
     val path: String = "",
-    var uri:Uri=Uri.EMPTY,
+    var uri: Uri = Uri.EMPTY,
     val type: String = "",
     var isBookmarked: Boolean = false
 ) {
-    companion object {
+    var showSelect: Boolean = false
+    var isSelect: Boolean = false
 
+    companion object {
         const val TYPE_PDF = "type_pdf"
     }
 }

app/src/main/java/com/base/pdfviewerscannerwhite/ui/adapter/DocumentAdapter.kt

@@ -22,6 +22,7 @@ class DocumentAdapter : BaseQuickAdapter<DocumentBean, DocumentAdapter.DocumentV
     var itemClick: ((item: DocumentBean) -> Unit)? = null
     var bookmarkAction: ((addRemove: Boolean, path: String) -> Unit)? = null
     var moreAction: ((item: DocumentBean) -> Unit)? = null
+    var selectAction: ((size: Int) -> Unit)? = null
 
     @SuppressLint("SetTextI18n")
     override fun onBindViewHolder(holder: DocumentViewHolder, position: Int, item: DocumentBean?) {
@@ -33,6 +34,22 @@ class DocumentAdapter : BaseQuickAdapter<DocumentBean, DocumentAdapter.DocumentV
         val file = File(item.path)
         binding.tvName.text = file.name
         binding.tvInfo.text = file.lastModified().toFormatTime() + " " + file.length().toFormatSize()
+
+        if (item.showSelect) {
+            binding.flMore.visibility = View.INVISIBLE
+            binding.flBookmark.visibility = View.INVISIBLE
+            binding.flSelect.visibility = View.VISIBLE
+            binding.ivSelector.isSelected = item.isSelect
+
+            binding.flSelect.setOnClickListener {
+                item.isSelect = !item.isSelect
+                notifyItemChanged(position, "aaa")
+                selectAction?.invoke(items.filter { it.isSelect }.size)
+            }
+        } else {
+            binding.flSelect.visibility = View.GONE
+            binding.flMore.visibility = View.VISIBLE
+            binding.flBookmark.visibility = View.VISIBLE
             if (item.isBookmarked) {
                 binding.ivBookmark.setImageResource(R.mipmap.h_soucang_s)
             } else {
@@ -51,6 +68,9 @@ class DocumentAdapter : BaseQuickAdapter<DocumentBean, DocumentAdapter.DocumentV
             binding.flMore.setOnClickListener {
                 moreAction?.invoke(item)
             }
+        }
+
+
         binding.root.setOnClickListener {
             itemClick?.invoke(item)
         }

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfActivity.kt

@@ -11,7 +11,6 @@ import android.view.View
 import android.view.animation.Animation
 import android.view.animation.TranslateAnimation
 import android.view.inputmethod.EditorInfo
-import android.view.inputmethod.InputMethodManager
 import androidx.activity.addCallback
 import androidx.core.widget.addTextChangedListener
 import com.artifex.mupdfdemo.Annotation
@@ -27,6 +26,8 @@ import com.base.pdfviewerscannerwhite.bean.PdfPageBean
 import com.base.pdfviewerscannerwhite.databinding.ActivityPdfBinding
 import com.base.pdfviewerscannerwhite.helper.BaseActivity
 import com.base.pdfviewerscannerwhite.ui.document.pdf.PdfLoadingActivity.Companion.DO_SAVE_PDF
+import com.base.pdfviewerscannerwhite.utils.KeyBoardUtils.hideKeyboard
+import com.base.pdfviewerscannerwhite.utils.KeyBoardUtils.showKeyBoard
 import com.base.pdfviewerscannerwhite.utils.ToastUtils.toast
 import java.io.File
 
@@ -71,20 +72,34 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
         if (muPDFCore == null) {
             toast("can't open pdf")
         } else {
-            pdfPresenter.iniPdfPage(path)
             createPdfUI()
+            binding.root.postDelayed({
+                pdfPresenter.iniPdfPage(path)
+            }, 500)
         }
-
-
     }
 
     override fun initListener() {
         onBackPressedDispatcher.addCallback {
+            hideKeyboard(binding.editSearch)
+
             if (uiMode == UI_MODE_SEARCH) {
                 changeNormalUI()
+                cancelSearch()
+                return@addCallback
+            }
+            if (uiMode == UI_MODE_EDITE_SELECT) {
+                changeNormalUI()
+                cancelOperation()
+                return@addCallback
+            }
+            if (uiMode == UI_MODE_EDITE_SAVE) {
+                changeNormalUI()
+                resetPdfView()
                 return@addCallback
             }
 
+            finishToMain()
         }
         binding.flFanhui.setOnClickListener {
             onBackPressedDispatcher.onBackPressed()
@@ -145,7 +160,7 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
         binding.ivSearch.setOnClickListener {
             bianJiScaleXiao {
                 changeSearchUI()
-                binding.editSearch.requestFocus()
+                showKeyBoard(binding.editSearch)
             }
         }
         binding.editSearch.addTextChangedListener {
@@ -172,11 +187,31 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
         }
     }
 
+    private fun resetPdfView() {
+        val pageView = binding.mupdfReaderView.displayedView as MuPDFView?
+        binding.mupdfReaderView.refresh(true)
+    }
+
+    private fun cancelOperation() {
+        val pageView = binding.mupdfReaderView.displayedView as MuPDFView?
+        if (pageView != null) {
+            pageView.deselectAnnotation()
+            pageView.deleteSelectedAnnotation()
+            pageView.deselectText()
+            pageView.cancelDraw()
+        }
+    }
+
+    private fun cancelSearch() {
+        SearchTaskResult.set(null)
+        binding.mupdfReaderView.resetupChildren()
+    }
+
     /**
      * 有个问题，一旦pdf某页编辑后加个蒙层，搜索功能就是失效了
      */
     private fun search(direction: Int) {
-        this.hideKeyboard()
+        this.hideKeyboard(binding.editSearch)
         val displayPage: Int = binding.mupdfReaderView.displayedViewIndex
         val r = SearchTaskResult.get()
         val searchPage = r?.pageNumber ?: -1
@@ -192,18 +227,12 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
     }
 
 
-    @SuppressLint("ServiceCast")
-    private fun hideKeyboard() {
-        val imm = this.getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager
-        imm.hideSoftInputFromWindow(binding.editSearch.windowToken, 0)
-    }
-
     private var isShowTopBottomLayout = true
     private fun hideTopBottomLayout() {
         if (isShowTopBottomLayout) {
             isShowTopBottomLayout = false
 
-            hideKeyboard()
+            hideKeyboard(binding.editSearch)
             val topAnim: Animation = TranslateAnimation(0f, 0f, 0f, -binding.vAnimatorTop.height.toFloat())
             topAnim.setDuration(200)
             topAnim.setAnimationListener(object : Animation.AnimationListener {
@@ -267,6 +296,7 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
     }
 
     private fun bianJiScaleDa() {
+        if (binding.ivBianji.scaleX == 0f) {
             val scaleXAnimator = ObjectAnimator.ofFloat(binding.ivBianji, "scaleX", 0f, 1.0f)
             scaleXAnimator.duration = 200
             val scaleYAnimator = ObjectAnimator.ofFloat(binding.ivBianji, "scaleY", 0f, 1.0f)
@@ -277,7 +307,10 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
             animatorSet.start()
         }
 
+    }
+
     private fun bianJiScaleXiao(endAction: (() -> Unit)? = null) {
+        if (binding.ivBianji.scaleX == 1f) {
             val scaleXAnimator = ObjectAnimator.ofFloat(binding.ivBianji, "scaleX", 1.0f, 0f)
             scaleXAnimator.duration = 200
             val scaleYAnimator = ObjectAnimator.ofFloat(binding.ivBianji, "scaleY", 1.0f, 0f)
@@ -296,6 +329,7 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
             animatorSet.playTogether(scaleXAnimator, scaleYAnimator)
             animatorSet.start()
         }
+    }
 
     /**
      * 构建pdf的ui
@@ -347,13 +381,18 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
      */
     private fun changeNormalUI() {
         uiMode = UI_MODE_NORMAL
+        binding.ivWancheng.visibility = View.GONE
         binding.clOperation.visibility = View.GONE
         binding.tvBtnSave.visibility = View.GONE
+        binding.editSearch.visibility = View.INVISIBLE
 
         binding.ivXuanzhuan.visibility = View.VISIBLE
         binding.ivSearch.visibility = View.VISIBLE
         binding.ivMore.visibility = View.VISIBLE
         binding.rvPager.visibility = View.VISIBLE
+        binding.tvPdfName.visibility = View.VISIBLE
+
+        bianJiScaleDa()
     }
 
     /**
@@ -386,6 +425,8 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
 
         binding.ivWancheng.visibility = View.VISIBLE
 
+
+
         if (binding.llHighlight == view) {
             binding.llHighlight.setBackgroundColor(Color.parseColor("#F5F5F5"))
         } else {
@@ -413,6 +454,7 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
      * 编辑报错UI模式
      */
     private fun changeEditSaveUI() {
+        uiMode = UI_MODE_EDITE_SAVE
         binding.ivWancheng.visibility = View.INVISIBLE
         binding.ivMore.visibility = View.INVISIBLE
         binding.ivXuanzhuan.visibility = View.INVISIBLE
@@ -437,8 +479,8 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
 
         const val UI_MODE_NORMAL = 0
         const val UI_MODE_SEARCH = 1
-        const val UI_MODE_EDITE_SAVE = 2
-        const val UI_MODE_EDITE_SELECT = 3
+        const val UI_MODE_EDITE_SELECT = 2
+        const val UI_MODE_EDITE_SAVE = 3
 
         const val SAVE_MODE_HIGHLIGHT = "Highlight"
         const val SAVE_MODE_GLIDE_LINE = "Glide Line"

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfMergeActivity.kt

+package com.base.pdfviewerscannerwhite.ui.document.pdf
+
+import com.base.pdfviewerscannerwhite.databinding.ActivityPdfMergeBinding
+import com.base.pdfviewerscannerwhite.helper.BaseActivity
+
+class PdfMergeActivity : BaseActivity<ActivityPdfMergeBinding>() {
+
+
+    override val binding: ActivityPdfMergeBinding by lazy {
+        ActivityPdfMergeBinding.inflate(layoutInflater)
+    }
+
+
+    override fun initView() {
+    }
+
+}
\ No newline at end of file

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfSelectActivity.kt

+package com.base.pdfviewerscannerwhite.ui.document.pdf
+
+import android.annotation.SuppressLint
+import android.view.View
+import androidx.lifecycle.lifecycleScope
+import com.base.pdfviewerscannerwhite.bean.DocumentBean
+import com.base.pdfviewerscannerwhite.databinding.ActivityPdfSelectBinding
+import com.base.pdfviewerscannerwhite.helper.BaseActivity
+import com.base.pdfviewerscannerwhite.ui.adapter.DocumentAdapter
+import com.base.pdfviewerscannerwhite.ui.main.DocumentPresenter
+import com.base.pdfviewerscannerwhite.ui.main.DocumentView
+
+class PdfSelectActivity : BaseActivity<ActivityPdfSelectBinding>(), DocumentView {
+
+    private lateinit var documentPresenter: DocumentPresenter
+
+    private lateinit var adapter: DocumentAdapter
+
+    override val binding: ActivityPdfSelectBinding by lazy {
+        ActivityPdfSelectBinding.inflate(layoutInflater)
+    }
+
+    override fun initView() {
+        documentPresenter = DocumentPresenter(this, this, DocumentBean.TYPE_PDF, lifecycleScope)
+
+        initAdapter()
+        documentPresenter.initData()
+    }
+
+    @SuppressLint("SetTextI18n")
+    private fun initAdapter() {
+        adapter = DocumentAdapter()
+        adapter.selectAction = {
+            if (it == 0) {
+                binding.tvSelectTip.visibility = View.INVISIBLE
+                binding.tvBtnNext.isEnabled = false
+            } else {
+                binding.tvBtnNext.isEnabled = true
+                binding.tvSelectTip.visibility = View.VISIBLE
+                binding.tvSelectTip.text = "$it items has been selected"
+            }
+        }
+        binding.rv.adapter = adapter
+    }
+
+    override fun refreshDocumentRv(documentList: List<DocumentBean>) {
+        super.refreshDocumentRv(documentList)
+        documentList.map { it.showSelect = true }
+        adapter.submitList(documentList)
+    }
+}
\ No newline at end of file

app/src/main/java/com/base/pdfviewerscannerwhite/ui/main/DocumentFragment.kt

@@ -32,14 +32,14 @@ class DocumentFragment() : BaseFragment<FragmentDocumentBinding>(), DocumentView
     }
 
     override fun setView() {
-        documentPresenter = DocumentPresenter(this, type, lifecycleScope)
+        documentPresenter = DocumentPresenter(requireContext(), this, type, lifecycleScope)
         initAdapter()
 
         if (documentList != null) {
             adapter.submitList(documentList)
         } else {
             if (requireContext().checkStorePermission()) {
-                documentPresenter.initData(requireContext())
+                documentPresenter.initData()
             }
         }
     }
@@ -99,7 +99,7 @@ class DocumentFragment() : BaseFragment<FragmentDocumentBinding>(), DocumentView
     override fun dialogRename(item: DocumentBean) {
         val file = File(item.path)
         requireContext().showDocumentRenameDialog(file.name, firstDialog) { newName ->
-            documentPresenter.renameDocumentBean(requireContext(), file, newName)
+            documentPresenter.renameDocumentBean(file, newName)
         }
     }
 

app/src/main/java/com/base/pdfviewerscannerwhite/ui/main/DocumentPresenter.kt

@@ -11,12 +11,13 @@ import kotlinx.coroutines.launch
 import java.io.File
 
 class DocumentPresenter(
+    val context: Context,
     val documentView: DocumentView,
     val type: String,
     val lifecycleScope: LifecycleCoroutineScope
 ) {
 
-    fun getDocumentBeanList(context: Context): List<DocumentBean> {
+    private fun getDocumentBeanList(): List<DocumentBean> {
         var selectionArgs = arrayOf(ConstObject.MIME_TYPE_PDF)
         if (type == DocumentBean.TYPE_PDF) {
             selectionArgs = arrayOf(ConstObject.MIME_TYPE_PDF)
@@ -30,8 +31,8 @@ class DocumentPresenter(
         return documentList
     }
 
-    fun initData(context: Context) = lifecycleScope.launch(Dispatchers.IO) {
-        val documentList = getDocumentBeanList(context)
+    fun initData() = lifecycleScope.launch(Dispatchers.IO) {
+        val documentList = getDocumentBeanList()
         launch(Dispatchers.Main) {
             documentView.refreshDocumentRv(documentList)
         }
@@ -45,13 +46,13 @@ class DocumentPresenter(
         }
     }
 
-    fun renameDocumentBean(context: Context, file: File, newName: String) = lifecycleScope.launch(Dispatchers.IO) {
+    fun renameDocumentBean(file: File, newName: String) = lifecycleScope.launch(Dispatchers.IO) {
 
         runCatching {
             val nameFile = File(file.parentFile, newName)
             file.renameTo(nameFile)
         }
-        val documentList = getDocumentBeanList(context)
+        val documentList = getDocumentBeanList()
         launch(Dispatchers.Main) {
             documentView.refreshDocumentRv(documentList)
         }

app/src/main/java/com/base/pdfviewerscannerwhite/ui/main/DocumentView.kt

@@ -4,9 +4,9 @@ import com.base.pdfviewerscannerwhite.bean.DocumentBean
 
 interface DocumentView {
 
-    fun dialogRename(item: DocumentBean)
-    fun refreshDocumentRv(documentList: List<DocumentBean>)
-    fun splitPdf(path: String)
+    fun dialogRename(item: DocumentBean) = Unit
+    fun refreshDocumentRv(documentList: List<DocumentBean>) = Unit
+    fun splitPdf(path: String) = Unit
 
-    fun deleteDocument(item: DocumentBean)
+    fun deleteDocument(item: DocumentBean) = Unit
 }
\ No newline at end of file

app/src/main/java/com/base/pdfviewerscannerwhite/ui/main/ToolFragment.kt

 package com.base.pdfviewerscannerwhite.ui.main
 
-import androidx.recyclerview.widget.RecyclerView
+import android.content.Intent
 import com.base.pdfviewerscannerwhite.databinding.FragmentToolBinding
 import com.base.pdfviewerscannerwhite.helper.BaseFragment
+import com.base.pdfviewerscannerwhite.ui.document.pdf.PdfSelectActivity
 
 
 class ToolFragment : BaseFragment<FragmentToolBinding>() {
@@ -14,4 +15,11 @@ class ToolFragment : BaseFragment<FragmentToolBinding>() {
     override fun setView() {
     }
 
+    override fun setListener() {
+        super.setListener()
+        binding.llMerge.setOnClickListener {
+            startActivity(Intent(requireContext(), PdfSelectActivity::class.java))
+        }
+    }
+
 }
\ No newline at end of file

app/src/main/java/com/base/pdfviewerscannerwhite/utils/KeyBoardUtils.kt

+package com.base.pdfviewerscannerwhite.utils
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Context.INPUT_METHOD_SERVICE
+import android.view.inputmethod.InputMethodManager
+import android.widget.EditText
+
+
+object KeyBoardUtils {
+
+    @SuppressLint("ServiceCast")
+    fun Context.hideKeyboard(editText: EditText) {
+        editText.clearFocus()
+        val imm = this.getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager
+        imm.hideSoftInputFromWindow(editText.windowToken, 0)
+    }
+
+    @SuppressLint("ServiceCast")
+    fun Context.showKeyBoard(editText: EditText) {
+        editText.requestFocus()
+        val imm = this.getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager?
+        imm?.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT)
+    }
+}
\ No newline at end of file

app/src/main/res/drawable/bg_7fdcee_10.xml

 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <solid android:color="#00B8DE"/>
+    <solid android:color="#7FDCEE"/>
     <corners android:radius="10dp"/>
 </shape>
\ No newline at end of file

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

 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:drawable="@drawable/bg_00b8de_10" android:state_enabled="false" />
-    <item android:drawable="@drawable/bg_7fdcee_10" android:state_enabled="true" />
+    <item android:drawable="@drawable/bg_00b8de_10" android:state_enabled="true" />
+    <item android:drawable="@drawable/bg_7fdcee_10" android:state_enabled="false" />
 </selector>
\ No newline at end of file

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

@@ -90,7 +90,7 @@
                 android:src="@mipmap/wancheng"
                 android:visibility="gone"
                 app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintEnd_toStartOf="@id/iv_more"
+                app:layout_constraintStart_toStartOf="@id/iv_more"
                 app:layout_constraintTop_toTopOf="parent"
                 tools:ignore="ContentDescription" />
 
@@ -159,6 +159,17 @@
         app:layout_constraintTop_toBottomOf="@id/v_animator_top"
         tools:text="1/3" />
 
+    <ImageView
+        android:id="@+id/iv_bianji"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="15dp"
+        android:layout_marginBottom="108dp"
+        android:src="@mipmap/bianji"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        tools:ignore="ContentDescription" />
+
     <ViewAnimator
         android:id="@+id/v_animator_bottom"
         android:layout_width="match_parent"
@@ -182,7 +193,6 @@
                 android:visibility="gone"
                 app:layout_constraintBottom_toTopOf="@id/v_animator_bottom">
 
-
                 <LinearLayout
                     android:id="@+id/ll_highlight"
 
@@ -245,7 +255,6 @@
 
                 <LinearLayout
                     android:id="@+id/ll_strikethrough"
-
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:background="?android:attr/selectableItemBackground"
@@ -288,7 +297,7 @@
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_gravity="center_horizontal"
-                        android:src="@mipmap/strike"
+                        android:src="@mipmap/painting"
                         tools:ignore="ContentDescription" />
 
                     <TextView
@@ -296,7 +305,7 @@
                         android:layout_height="wrap_content"
                         android:layout_gravity="center_horizontal"
                         android:layout_marginTop="6dp"
-                        android:text="Strikethrough"
+                        android:text="Painting Brush"
                         android:textColor="#232323"
                         android:textSize="12sp"
                         tools:ignore="HardcodedText" />
@@ -320,16 +329,5 @@
 
     </ViewAnimator>
 
-    <ImageView
-        android:id="@+id/iv_bianji"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="15dp"
-        android:layout_marginBottom="108dp"
-        android:src="@mipmap/bianji"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        tools:ignore="ContentDescription" />
-
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

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

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.document.pdf.PdfMergeActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

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

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.document.pdf.PdfSelectActivity">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/cl_top"
+        android:layout_width="match_parent"
+        android:layout_height="60dp"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <FrameLayout
+            android:id="@+id/fl_fanhui"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toStartOf="@id/tv_select_tip"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent">
+
+            <ImageView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:padding="15dp"
+                android:src="@mipmap/fanhui_b"
+                tools:ignore="ContentDescription" />
+        </FrameLayout>
+
+        <TextView
+            android:id="@+id/tv_select_tip"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:singleLine="true"
+            android:textColor="@color/black"
+            android:textSize="19sp"
+            android:textStyle="bold"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/fl_fanhui"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:ignore="HardcodedText"
+            tools:text="1 item has been selected" />
+
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginBottom="8dp"
+        app:layout_constraintBottom_toTopOf="@id/tv_btn_next"
+        app:layout_constraintTop_toBottomOf="@id/cl_top">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/rv"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+            tools:listitem="@layout/item_docment" />
+    </FrameLayout>
+
+    <TextView
+        android:id="@+id/tv_btn_next"
+        android:layout_width="338dp"
+        android:layout_height="48dp"
+        android:layout_marginBottom="24dp"
+        android:background="@drawable/bg_selector_btn"
+        android:enabled="false"
+        android:gravity="center"
+        android:text="Next"
+        android:textColor="@color/white"
+        android:textSize="18sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:ignore="HardcodedText" />
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

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

@@ -17,8 +17,8 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        tools:src="@mipmap/h_pdfiocn"
-        tools:ignore="ContentDescription" />
+        tools:ignore="ContentDescription"
+        tools:src="@mipmap/h_pdfiocn" />
 
 
     <FrameLayout
@@ -42,6 +42,29 @@
             tools:ignore="ContentDescription" />
     </FrameLayout>
 
+    <FrameLayout
+        android:id="@+id/fl_select"
+        android:layout_width="45dp"
+        android:layout_height="45dp"
+        android:layout_marginEnd="5dp"
+        android:background="?android:attr/selectableItemBackground"
+        android:clickable="true"
+        android:focusable="true"
+        android:padding="15dp"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <ImageView
+            android:id="@+id/iv_selector"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:src="@drawable/bg_selector_select"
+            tools:ignore="ContentDescription" />
+    </FrameLayout>
+
     <FrameLayout
         android:id="@+id/fl_bookmark"
         android:layout_width="45dp"