support for assest folder

app/src/main/java/com/rajat/pdfviewer/MainActivity.kt

@@ -1,5 +1,8 @@
+
+
 package com.rajat.pdfviewer
 
+
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import kotlinx.android.synthetic.main.activity_main.*
@@ -11,15 +14,15 @@ class MainActivity : AppCompatActivity() {
 
         open_pdf.setOnClickListener {
             startActivity(
-                PdfViewerActivity.buildIntent(
+                PdfViewerActivity.launchPdfFromPath(
                     this,
-                    "url",
-                    false,
-                    "title",
-                    ""
+                    "quote.pdf",
+                    "Thailand Trip",
+                    "Trip",
+                    false
                 )
+
             )
         }
-
     }
 }

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.1.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sat Jul 11 15:48:36 IST 2020
+#Mon Jan 04 10:33:44 IST 2021
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

pdfViewer/src/main/AndroidManifest.xml

@@ -4,8 +4,10 @@
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
-    <application>
+    <application
+        android:requestLegacyExternalStorage="true">
         <activity
             android:name=".PdfViewerActivity"
             android:theme="@style/Theme.AppCompat.NoActionBar" />

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

@@ -44,9 +44,10 @@ class PdfViewerActivity : AppCompatActivity() {
         const val PERMISSION_CODE = 4040
         var engine = PdfEngine.INTERNAL
         var enableDownload = true
+        var isPDFFromPath = false
 
 
-        fun buildIntent(
+        fun launchPdfFromUrl(
             context: Context?,
             pdfUrl: String?,
             isGoogleEngine: Boolean?,
@@ -60,6 +61,23 @@ class PdfViewerActivity : AppCompatActivity() {
             intent.putExtra(FILE_DIRECTORY, directoryName)
             intent.putExtra(ENABLE_FILE_DOWNLOAD, enableDownload)
             intent.putExtra(IS_GOOGLE_ENGINE, isGoogleEngine)
+            isPDFFromPath = false
+            return intent
+        }
+
+        fun launchPdfFromPath(
+            context: Context?,
+            path: String?,
+            pdfTitle: String?,
+            directoryName: String?,
+            enableDownload: Boolean = true
+        ): Intent {
+            val intent = Intent(context, PdfViewerActivity::class.java)
+            intent.putExtra(FILE_URL, path)
+            intent.putExtra(FILE_TITLE, pdfTitle)
+            intent.putExtra(FILE_DIRECTORY, directoryName)
+            intent.putExtra(ENABLE_FILE_DOWNLOAD, enableDownload)
+            isPDFFromPath = true
             return intent
         }
 
@@ -89,14 +107,18 @@ class PdfViewerActivity : AppCompatActivity() {
 
         if (intent.extras!!.containsKey(FILE_URL)) {
             fileUrl = intent.extras!!.getString(FILE_URL)
-            if (checkInternetConnection(this)) {
-                loadFileFromNetwork(this.fileUrl)
-            } else {
-                Toast.makeText(
-                    this,
-                    "No Internet Connection. Please Check your internet connection.",
-                    Toast.LENGTH_SHORT
-                ).show()
+            if (isPDFFromPath){
+                initPdfViewerWithPath(this.fileUrl)
+            }else {
+                if (checkInternetConnection(this)) {
+                    loadFileFromNetwork(this.fileUrl)
+                } else {
+                    Toast.makeText(
+                        this,
+                        "No Internet Connection. Please Check your internet connection.",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
             }
         }
 
@@ -188,6 +210,26 @@ class PdfViewerActivity : AppCompatActivity() {
             onPdfError()
         }
 
+        enableDownload()
+
+    }
+
+    private fun initPdfViewerWithPath(filePath: String?) {
+        if (TextUtils.isEmpty(filePath)) onPdfError()
+
+        //Initiating PDf Viewer with URL
+        try {
+            pdfView.initWithFile(
+                com.rajat.pdfviewer.util.FileUtils.fileFromAsset(this,filePath!!),
+            PdfQuality.NORMAL)
+        } catch (e: Exception) {
+            onPdfError()
+        }
+
+        enableDownload()
+    }
+
+    private fun enableDownload() {
         //Check permission for download
         checkPermissionOnInit()
 
@@ -217,7 +259,6 @@ class PdfViewerActivity : AppCompatActivity() {
             }
 
         }
-
     }
 
     private fun checkPermissionOnInit() {
@@ -260,34 +301,39 @@ class PdfViewerActivity : AppCompatActivity() {
                 if (TextUtils.isEmpty(directoryName)) "/$fileName.pdf" else "/$directoryName/$fileName.pdf"
 
             try {
-                val downloadUrl = Uri.parse(fileUrl)
-                val downloadManger = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager?
-                val request = DownloadManager.Request(downloadUrl)
-                request.setAllowedNetworkTypes(
-                    DownloadManager.Request.NETWORK_WIFI or
-                            DownloadManager.Request.NETWORK_MOBILE
-                )
-                request.setAllowedOverRoaming(true)
-                request.setTitle(fileName)
-                request.setDescription("Downloading $fileName")
-                request.setVisibleInDownloadsUi(true)
-                request.setDestinationInExternalPublicDir(
-                    Environment.DIRECTORY_DOWNLOADS,
-                    filePath
-                )
-                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
-                registerReceiver(
-                    onComplete,
-                    IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)
-                )
-                if (permissionGranted!!) downloadManger!!.enqueue(request)
-            } catch (e: Exception) {
-                Toast.makeText(
-                    this,
-                    "Unable to download file",
-                    Toast.LENGTH_SHORT
-                ).show()
-            }
+                if (isPDFFromPath) {
+                    com.rajat.pdfviewer.util.FileUtils.downloadFile(this,fileUrl!!,directoryName!!,fileName)
+                } else {
+                    val downloadUrl = Uri.parse(fileUrl)
+                    val downloadManger =
+                        getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager?
+                    val request = DownloadManager.Request(downloadUrl)
+                    request.setAllowedNetworkTypes(
+                        DownloadManager.Request.NETWORK_WIFI or
+                                DownloadManager.Request.NETWORK_MOBILE
+                    )
+                    request.setAllowedOverRoaming(true)
+                    request.setTitle(fileName)
+                    request.setDescription("Downloading $fileName")
+                    request.setVisibleInDownloadsUi(true)
+                    request.setDestinationInExternalPublicDir(
+                        Environment.DIRECTORY_DOWNLOADS,
+                        filePath
+                    )
+                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
+                    registerReceiver(
+                        onComplete,
+                        IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)
+                    )
+                    if (permissionGranted!!) downloadManger!!.enqueue(request)
+                }
+            }catch (e: Exception) {
+                    Toast.makeText(
+                        this,
+                        "Unable to download file",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
 
         } catch (e: Exception) {
             Log.e("Error", e.toString())

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

@@ -0,0 +1,51 @@
+package com.rajat.pdfviewer.util
+
+import android.content.Context
+import android.os.Environment
+import android.provider.MediaStore
+import android.text.TextUtils
+import java.io.*
+
+object FileUtils {
+    @Throws(IOException::class)
+    fun fileFromAsset(context: Context, assetName: String): File {
+        val outFile = File(context.cacheDir, "$assetName")
+        if (assetName.contains("/")) {
+            outFile.parentFile.mkdirs()
+        }
+        copy(context.assets.open(assetName), outFile)
+        return outFile
+    }
+
+    @Throws(IOException::class)
+    fun copy(inputStream: InputStream?, output: File?) {
+        var outputStream: OutputStream? = null
+        try {
+                outputStream = FileOutputStream(output)
+            var read = 0
+            val bytes = ByteArray(1024)
+            while (inputStream!!.read(bytes).also { read = it } != -1) {
+                outputStream.write(bytes, 0, read)
+            }
+        } finally {
+            try {
+                inputStream?.close()
+            } finally {
+                outputStream?.close()
+            }
+        }
+    }
+
+    @Throws(IOException::class)
+    fun downloadFile(context: Context, assetName: String, filePath: String, fileName: String?){
+
+       val dirPath = "${Environment.getExternalStorageDirectory()}/${filePath}"
+        val outFile = File(dirPath)
+        //Create New File if not present
+        if (!outFile.exists()) {
+            outFile.mkdirs()
+        }
+        val outFile1 = File(dirPath, "/$fileName.pdf")
+        copy(context.assets.open(assetName), outFile1)
+    }
+}