Load PDF from Internet in Android using Barteksc

   //PdfViewer  
   implementation 'com.github.barteksc:android-pdf-viewer:3.1.0-beta.1'  

 <uses-permission android:name="android.permission.INTERNET" />  
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />  

   <com.github.barteksc.pdfviewer.PDFView  
     android:id="@+id/pdfView"  
     android:layout_width="match_parent"  
     android:layout_height="match_parent"/>  
   <ProgressBar  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:layout_centerInParent="true"  
     android:id="@+id/progressBar"  
     />  

 // Setup Veriable in Public Class ==============  
 PDFView pdfView;  
 ProgressBar progressBar;  
   
   
 // Add This In OnCreate Method ==============  
  pdfView = findViewById(R.id.pdfView);  
     progressBar = findViewById(R.id.progressBar);  
     Intent intent = getIntent();  
     String PDFURL = intent.getStringExtra("pdflink");  
     new RetrivePDFfromUrl().execute(PDFURL);  
   
   
 // Create Public Class in this Activity  
   private class RetrivePDFfromUrl extends AsyncTask<String, Void, InputStream> {  
     @Override  
     protected InputStream doInBackground(String... strings) {  
       InputStream inputStream = null;  
       try {  
         URL url = new URL(strings[0]);  
         HttpURLConnection urlConnection = (HttpsURLConnection) url.openConnection();  
         if (urlConnection.getResponseCode() == 200) {  
           inputStream = new BufferedInputStream(urlConnection.getInputStream());  
         }  
       } catch (IOException e) {  
         e.printStackTrace();  
         return null;  
       }  
       return inputStream;  
     }  
   
     @Override  
     protected void onPostExecute(InputStream inputStream) {  
   
       pdfView.fromStream(inputStream)  
           .enableSwipe(true)  
           .swipeHorizontal(true)  
           .enableDoubletap(true)  
           .defaultPage(0)  
           .enableAnnotationRendering(false)  
           .password(null)  
           .scrollHandle(null)  
           .enableAntialiasing(true)  
           .spacing(0)  
           .pageFitPolicy(FitPolicy.WIDTH)  
   
           .pageSnap(true) // snap pages to screen boundaries  
           .pageFling(true) // make a fling change only a single page like ViewPager  
   
           .onLoad(new OnLoadCompleteListener() {  
             @Override  
             public void loadComplete(int nbPages) {  
               progressBar.setVisibility(View.GONE);  
             }  
           })  
           .load();  
     }  
   
   }  

   Intent intent = new Intent(this, PdfViewer.class);  
           intent.putExtra("serverURL", Constants.CHEMISTRY);  
           startActivity(intent);