File Copy Implementation

pdfViewer/src/main/java/com/rajat/pdfviewer/PdfViewerActivity.kt

@@ -24,6 +24,7 @@ import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
+import com.rajat.pdfviewer.util.FileUtils.copyFile
 import kotlinx.android.synthetic.main.activity_pdf_viewer.*
 import kotlinx.android.synthetic.main.pdf_view_tool_bar.*
 import java.io.File
@@ -326,14 +327,20 @@ class PdfViewerActivity : AppCompatActivity() {
                     if (TextUtils.isEmpty(directoryName)) "/$fileName.pdf" else "/$directoryName/$fileName.pdf"
 
                 try {
-                    if (isPDFFromPath) {
+                    if (isPDFFromPath)
+                        if (isFromAssets)
                         com.rajat.pdfviewer.util.FileUtils.downloadFile(
                             this,
                             fileUrl!!,
                             directoryName!!,
-                            fileName
-                        )
-                    } else {
+                            fileName)
+                        else {
+                            copyFile(fileUrl!!, directoryName!!, fileName!!)
+                            Toast.makeText(this,
+                                "PDF successfully saved to $directoryName/$fileName.pdf",
+                                Toast.LENGTH_LONG).show()
+                        }
+                    else {
                         val downloadUrl = Uri.parse(fileUrl)
                         val downloadManger =
                             getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager?
@@ -366,6 +373,7 @@ class PdfViewerActivity : AppCompatActivity() {
                         "Unable to download file",
                         Toast.LENGTH_SHORT
                     ).show()
+                    e.printStackTrace()
                 }
             } else {
                 checkPermissionOnInit()

pdfViewer/src/main/java/com/rajat/pdfviewer/util/FileUtils.kt

@@ -2,8 +2,8 @@ package com.rajat.pdfviewer.util
 
 import android.content.Context
 import android.os.Environment
-import android.provider.MediaStore
-import android.text.TextUtils
+import android.os.Environment.DIRECTORY_DOWNLOADS
+import android.os.Environment.getExternalStoragePublicDirectory
 import java.io.*
 
 object FileUtils {
@@ -37,15 +37,22 @@ object FileUtils {
     }
 
     @Throws(IOException::class)
-    fun downloadFile(context: Context, assetName: String, filePath: String, fileName: String?){
-
-       val dirPath = "${Environment.getExternalStorageDirectory()}/${filePath}"
+    fun downloadFile(context: Context, assetName: String, filePath: String, fileName: String?) {
+       val dirPath = "${Environment.getExternalStorageDirectory()}/$filePath"
         val outFile = File(dirPath)
-        //Create New File if not present
+        // Create New File if not present
         if (!outFile.exists()) {
             outFile.mkdirs()
         }
+
         val outFile1 = File(dirPath, "/$fileName.pdf")
         copy(context.assets.open(assetName), outFile1)
     }
-}
+
+    fun copyFile(fullPath: String, destPath: String?, fileName: String) {
+        val outFile = File(destPath
+            ?: getExternalStoragePublicDirectory(
+                DIRECTORY_DOWNLOADS).path, "/$fileName.pdf")
+        File(fullPath).copyTo(outFile, true)
+    }
+}