...提交部分功能...

app/src/main/java/com/base/superpdfreader/activity/PdfBrowserActivity.kt

@@ -6,15 +6,17 @@ import android.animation.ValueAnimator
 import android.annotation.SuppressLint
 import android.graphics.Color
 import android.view.View
+import android.widget.Toast
 import androidx.activity.addCallback
 import androidx.core.animation.addListener
 import androidx.lifecycle.lifecycleScope
-import com.base.superpdfreader.bean.PdfParameterBean
 import com.base.superpdfreader.databinding.ActivityPdfBrowserBinding
 import com.base.superpdfreader.helps.BaseActivity
 import com.base.superpdfreader.helps.LogEx
 import com.base.superpdfreader.utils.BarUtils
+import com.base.superpdfreader.view.DialogViews.showEnterDdfPassword
 import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle
+import com.tom_roush.pdfbox.pdmodel.PDDocument
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
@@ -40,17 +42,44 @@ class PdfBrowserActivity : BaseActivity<ActivityPdfBrowserBinding>() {
         val path = intent.extras?.getString("Path") ?: ""
         val file = File(path)
         if (file.exists()) {
-            binding.pdfview.fromFile(file)
-                .defaultPage(pageNumber)
-                .enableAnnotationRendering(true)
-                .scrollHandle(object : DefaultScrollHandle(this) {})
-                .spacing(10)
-                .onPageError { page, t -> }
-                .load()
+
+            try {
+                PDDocument.load(file)
+                loadPdfView(file)
+            } catch (e: Exception) {
+
+                dialog = showEnterDdfPassword(cancel = {
+                    finishToMain()
+                }, ok = { password ->
+                    var pdDocument: PDDocument? = null
+                    runCatching {
+                        pdDocument = PDDocument.load(file, password)
+                    }
+                    if (pdDocument != null) {
+                        dialog?.dismiss()
+                        loadPdfView(file, password)
+                    } else {
+                        Toast.makeText(this, "Wrong password", Toast.LENGTH_SHORT).show()
+                    }
+
+                })
+            }
+
 
         }
     }
 
+    private fun loadPdfView(file: File, password: String = "") {
+        binding.pdfview.fromFile(file)
+            .defaultPage(pageNumber)
+            .enableAnnotationRendering(true)
+            .scrollHandle(object : DefaultScrollHandle(this) {})
+            .spacing(10)
+            .onPageError { page, t ->
+                LogEx.logDebug(TAG, "error $t")
+            }.password(password).load()
+    }
+
     override fun initListener() {
         binding.pdfview.setOnClickListener {
             toggleTools()

app/src/main/java/com/base/superpdfreader/helps/pdf/PdfHelp.kt

@@ -12,6 +12,8 @@ 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.encryption.AccessPermission
+import com.tom_roush.pdfbox.pdmodel.encryption.StandardProtectionPolicy
 import com.tom_roush.pdfbox.pdmodel.graphics.image.PDImageXObject
 import java.io.BufferedInputStream
 import java.io.ByteArrayOutputStream
@@ -28,11 +30,10 @@ object PdfHelp {
         LogEx.logDebug(TAG, "pageSize=${arrayPageSize[pdfParameterBean.pageSize]}")
         LogEx.logDebug(TAG, "margin=${arrayMargin[pdfParameterBean.margin]}")
         LogEx.logDebug(TAG, "compression=${arrayCompression[pdfParameterBean.compression]}")
+        LogEx.logDebug(TAG, "password=${pdfParameterBean.password}")
 
         try {
             PDDocument().use { document ->
-
-
                 pdfParameterBean.pathArray.forEach { imagePath ->
 
 //                    val pdImage = PDImageXObject.createFromFileByExtension(File(imagePath), document)
@@ -111,7 +112,9 @@ object PdfHelp {
                         }
                     }
                 }
-
+                pdfParameterBean.password?.let { pwd ->
+                    protectPdf(pwd, document)
+                }
                 document.save(pdfPath) // 保存 PDF
             }
         } catch (e: IOException) {
@@ -120,6 +123,14 @@ object PdfHelp {
 
     }
 
+    fun protectPdf(password: String, document: PDDocument) {
+        val accessPermission = AccessPermission()
+        val spp = StandardProtectionPolicy(password, password, accessPermission)
+        spp.setEncryptionKeyLength(128)
+        spp.permissions = accessPermission
+        document.protect(spp)
+    }
+
     fun compressImage(path: String, compress: Int): ByteArray {
         val bitmap = openImage2Bitmap(path)
         val out = ByteArrayOutputStream()

app/src/main/java/com/base/superpdfreader/view/DialogViews.kt

@@ -13,6 +13,8 @@ import com.base.superpdfreader.R
 import com.base.superpdfreader.databinding.DialogPermissonOpenBinding
 import com.base.superpdfreader.databinding.ItemDeleteTipBinding
 import com.base.superpdfreader.databinding.ItemEditBinding
+import com.base.superpdfreader.databinding.ItemEnterPdfPasswordBinding
+import com.base.superpdfreader.view.DialogViews.showDeleteConfirm
 import com.base.superpdfreader.view.DialogViews.showRenameDialog
 
 object DialogViews {
@@ -110,4 +112,39 @@ object DialogViews {
         nButton.textSize = 16f
         nButton.setTextColor(ContextCompat.getColor(this, R.color.color_pdf))
     }
+
+    fun Context.showEnterDdfPassword(cancel: () -> Unit, ok: (password: String) -> Unit): AlertDialog? {
+
+        val view = LayoutInflater.from(this).inflate(R.layout.item_enter_pdf_password, null, false)
+        val binding = ItemEnterPdfPasswordBinding.bind(view)
+
+        val dialog = AlertDialog.Builder(this)
+            .setView(view)
+            .setPositiveButton("OK")
+            { dialog, which ->
+                val pwd = binding.editPassword.text.toString()
+                if (pwd.isEmpty()) {
+                    Toast.makeText(this, "Password cannot be empty", Toast.LENGTH_SHORT).show()
+                    return@setPositiveButton
+                }
+                ok.invoke(pwd)
+            }.setNegativeButton("CANCEL")
+            { dialog, which ->
+                dialog.dismiss()
+                cancel.invoke()
+            }.create()
+
+        dialog.setCanceledOnTouchOutside(false)
+        dialog.show()
+
+        val pButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE)
+        val nButton = dialog.getButton(AlertDialog.BUTTON_NEGATIVE)
+
+        pButton.textSize = 16f
+        pButton.setTextColor(ContextCompat.getColor(this, R.color.color_pdf))
+        nButton.textSize = 16f
+        nButton.setTextColor(ContextCompat.getColor(this, R.color.color_pdf))
+
+        return dialog
+    }
 }

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

@@ -18,7 +18,7 @@
         android:id="@+id/pdfview"
         android:layout_width="match_parent"
         android:layout_height="0dp"
-        android:background="#FACCC6"
+        android:background="#E0E0E0"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/v_top" />
 

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

@@ -275,6 +275,8 @@
             android:layout_marginHorizontal="15dp"
             android:background="@null"
             android:hint="Password"
+            android:inputType="textVisiblePassword"
+            android:singleLine="true"
             tools:ignore="Autofill,HardcodedText,TextFields" />
 
     </com.noober.background.view.BLFrameLayout>

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

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="30dp"
+        android:layout_marginTop="15dp"
+        tools:ignore="UseCompoundDrawables">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:src="@mipmap/lock_pdf"
+            tools:ignore="ContentDescription" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginStart="16dp"
+            android:text="Protected PDF"
+            android:textColor="@color/black"
+            android:textSize="20sp"
+            tools:ignore="HardcodedText" />
+
+    </LinearLayout>
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="30dp"
+        android:layout_marginTop="10dp"
+        android:text="Enter password"
+        android:textSize="16sp"
+        tools:ignore="HardcodedText" />
+
+    <EditText
+        android:textSize="16sp"
+        android:id="@+id/edit_password"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="30dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="16dp"
+        android:inputType="textVisiblePassword"
+        android:theme="@style/MyMyEditText"
+        tools:ignore="Autofill,LabelFor,TextFields" />
+
+</LinearLayout>
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