...提交部分功能...

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

 package com.base.superpdfreader.helps.pdf
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import com.base.superpdfreader.bean.PdfParameterBean
+import com.base.superpdfreader.bean.PdfParameterBean.Companion.arrayCompression
+import com.base.superpdfreader.bean.PdfParameterBean.Companion.arrayMargin
+import com.base.superpdfreader.bean.PdfParameterBean.Companion.arrayOrientation
+import com.base.superpdfreader.bean.PdfParameterBean.Companion.arrayPageSize
 import com.base.superpdfreader.helps.LogEx
 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.PDImageXObject
-import java.io.File
+import java.io.BufferedInputStream
+import java.io.ByteArrayOutputStream
+import java.io.FileInputStream
 import java.io.IOException
 
+
 object PdfHelp {
 
     private val TAG = "PdfHelp"
-    fun convertImagesToPdf(imagePath: PdfParameterBean, pdfPath: String) {
+    fun convertImagesToPdf(pdfParameterBean: PdfParameterBean, pdfPath: String) {
+
+        LogEx.logDebug(TAG, "orientation=${arrayOrientation[pdfParameterBean.orientation]}")
+        LogEx.logDebug(TAG, "pageSize=${arrayPageSize[pdfParameterBean.pageSize]}")
+        LogEx.logDebug(TAG, "margin=${arrayMargin[pdfParameterBean.margin]}")
+        LogEx.logDebug(TAG, "compression=${arrayCompression[pdfParameterBean.compression]}")
+
         try {
             PDDocument().use { document ->
 
-                imagePath.pathArray.forEach { imagePath ->
-                    val page = PDPage(PDRectangle.A4) // 创建一个 A4 大小的页面
+
+                pdfParameterBean.pathArray.forEach { imagePath ->
+
+//                    val pdImage = PDImageXObject.createFromFileByExtension(File(imagePath), document)
+                    val compress = when (pdfParameterBean.compression) {
+                        0 -> 80
+                        1 -> 60
+                        2 -> 40
+                        else -> 100
+                    }
+                    val byteArray = compressImage(imagePath, compress)
+                    LogEx.logDebug(TAG, "compress size=${byteArray.size}")
+                    val pdImage = PDImageXObject.createFromByteArray(document, byteArray, "")
+
+                    //纸长大小
+                    val rectangle = when (pdfParameterBean.pageSize) {
+                        0 -> PDRectangle(pdImage.width.toFloat(), pdImage.height.toFloat())
+                        1 -> PDRectangle.A4
+                        2 -> PDRectangle.LETTER
+                        else -> PDRectangle.A4
+                    }
+
+                    val page = PDPage(rectangle)
                     document.addPage(page)
 
-                    val pdImage = PDImageXObject.createFromFileByExtension(File(imagePath), document)
-                    val pageSize = page.mediaBox
+                    if (pdfParameterBean.orientation == 1) {
+                        page.rotation = 90
+                    }
 
                     var x = 0f
                     var y = 0f
                     var scaledWidth = 0f
                     var scaledHeight = 0f
                     var needScale = false
+                    val pageSize = page.mediaBox
+                    var hMargin = 0
+                    var vMargin = 0
+                    if (pdfParameterBean.margin == 1) {
+                        hMargin = 100
+                        vMargin = 100
+                    } else if (pdfParameterBean.margin == 2) {
+                        hMargin = 200
+                        vMargin = 200
+                    }
 
-                    if (pdImage.width > pageSize.width || pdImage.height > pageSize.height) {
+                    if (pdImage.width > pageSize.width + hMargin * 2 || pdImage.height > pageSize.height + vMargin * 2) {
 //                        val scaleX = PDRectangle.A4.width / imageWidth
 //                        val scaleY = PDRectangle.A4.height / imageHeight
                         needScale = true
-                        val scaleX = pageSize.width / pdImage.width
-                        val scaleY = pageSize.height / pdImage.height
+                        val scaleX = pageSize.width / (pdImage.width + hMargin * 2)
+                        val scaleY = pageSize.height / (pdImage.height + vMargin * 2)
                         val scale = minOf(scaleX, scaleY)
                         scaledWidth = pdImage.width * scale
                         scaledHeight = pdImage.height * scale
@@ -47,6 +94,7 @@ object PdfHelp {
                         x = (pageSize.width - pdImage.width) / 2f
                         y = (pageSize.height - pdImage.height) / 2f
                     }
+
                     LogEx.logDebug(TAG, "x=$x y=$y")
                     LogEx.logDebug(TAG, "pageSize.width=${pageSize.width}")
                     LogEx.logDebug(TAG, "pageSize.height=${pageSize.height}")
@@ -55,7 +103,6 @@ object PdfHelp {
                     LogEx.logDebug(TAG, "scaledWidth=${scaledWidth}")
                     LogEx.logDebug(TAG, "scaledHeight=${scaledHeight}")
 
-
                     PDPageContentStream(document, page).use { contentStream ->
                         if (needScale) {
                             contentStream.drawImage(pdImage, x, y, scaledWidth, scaledHeight)
@@ -72,4 +119,38 @@ object PdfHelp {
         }
 
     }
+
+    fun compressImage(path: String, compress: Int): ByteArray {
+        val bitmap = openImage2Bitmap(path)
+        val out = ByteArrayOutputStream()
+        var format = Bitmap.CompressFormat.JPEG
+        if (path.contains(".png")) {
+            format = Bitmap.CompressFormat.PNG
+        }
+        try {
+            out.flush()
+            out.close()
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+
+        bitmap?.compress(format, compress, out)
+
+        return out.toByteArray()
+    }
+
+    fun openImage2Bitmap(imagePath: String): Bitmap? {
+        var bis: BufferedInputStream? = null
+        var bitmap: Bitmap? = null
+        try {
+            bis = BufferedInputStream(FileInputStream(imagePath))
+            bitmap = BitmapFactory.decodeStream(bis);
+        } catch (e: Exception) {
+
+        } finally {
+            bis?.close()
+        }
+        return bitmap
+    }
+
 }
\ No newline at end of file

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

@@ -5,7 +5,9 @@ import android.app.Dialog
 import android.content.Context
 import android.view.LayoutInflater
 import android.widget.TextView
+import android.widget.Toast
 import androidx.core.view.isVisible
+import androidx.core.widget.addTextChangedListener
 import com.base.superpdfreader.R
 import com.base.superpdfreader.bean.PdfParameterBean
 import com.base.superpdfreader.bean.PdfParameterBean.Companion.arrayCompression
@@ -40,6 +42,9 @@ object PDFSaveDialog {
         binding.tvMargin.text = arrayMargin[0]
         binding.tvCompression.text = arrayCompression[0]
 
+        binding.ivDelete.setOnClickListener {
+            binding.editName.setText("")
+        }
         binding.flOrientation.setOnClickListener {
             showPDFSaveParametersDialog(arrayOrientation) { index, text ->
                 pdfParameterBean.orientation = index
@@ -72,6 +77,12 @@ object PDFSaveDialog {
             if (binding.flPassword.isVisible) {
                 pdfParameterBean.password = binding.editPassword.text.toString()
             }
+            val editName = binding.editName.text.toString()
+            if (editName.isEmpty()) {
+                Toast.makeText(this, "Name cannot be empty", Toast.LENGTH_SHORT).show()
+                return@setOnClickListener
+            }
+            pdfParameterBean.pdfName = editName
             saveAction.invoke(pdfParameterBean)
             dialog.dismiss()
         }

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

@@ -11,21 +11,23 @@
         android:id="@+id/v_top"
         android:layout_width="match_parent"
         android:layout_height="40dp"
+        android:background="@color/white"
         app:layout_constraintTop_toTopOf="parent" />
 
     <com.github.barteksc.pdfviewer.PDFView
         android:id="@+id/pdfview"
         android:layout_width="match_parent"
         android:layout_height="0dp"
+        android:background="#FACCC6"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/v_top" />
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/ll_tools"
-        android:visibility="gone"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@color/white"
+        android:visibility="gone"
         app:layout_constraintTop_toTopOf="@id/pdfview">
 
 
@@ -104,6 +106,7 @@
         android:id="@+id/rv_page"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:background="@color/white"
         app:layout_constraintBottom_toBottomOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file