How to Convert WebView to PDF in Android?

Sometimes there is a need to save some articles available on the internet in the form of PDF files. And to do so there are many ways, one can use any browser extension or any software or any website to do so. But in order to implement this feature in the android app, one can't rely on other software or websites to do so. So to implement this amazing feature in the android app follow this tutorial. A sample GIF is given below to get an idea about what we are going to do in this article.

Steps for Converting WebView to PDF 

Step 1: Creating a New Project

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that choose Java as the programming language though we are going to implement this project in Java language.

Step 2: Before going to the coding section first do some pre-task

• Go to app -> manifests -> AndroidManifest.xml section and allow “Internet Permission“.

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

Step 3: Designing the UI 

In the activity_main.xml file, there is one WebView that is used to load the websites and one Button which is used to save the loaded webpage to PDF file. Here is the code for the activity_main.xml file.

Step 4: Working with MainActivity.java file

• Open the MainActivity.java file there within the class, first create the object of the WebView class.

// creating object of WebView
WebView printWeb;

• Now inside the onCreate() method, initialize the WebView and Button with their respective IDs that are given in the activity_main.xml file.

  // Initializing the WebView
final WebView webView=(WebView)findViewById(R.id.webViewMain);

  // Initializing the Button
Button savePdfBtn=(Button)findViewById(R.id.savePdfBtn);

• Now setWebViewClient of the WebView and inside the onPageFinished() initializes the printWeb object with the WebView.

 // Setting WebView Client
webView.setWebViewClient(new WebViewClient()
    {
           @Override
           public void onPageFinished(WebView view, String url) {
               super.onPageFinished(view, url);
               // initializing the printWeb Object
               printWeb=webView;
     }
});

• Now load the URL

 // loading the URL
webView.loadUrl("https://www.google.com//");

• Next, call the createWebPrintJob() method which is created later, inside the onClick(), and show the respective Toast Message.

 // setting clickListener for Save Pdf Button
 savePdfBtn.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               if(printWeb!=null)
               {
                   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                       // Calling createWebPrintJob()
                       PrintTheWebPage(printWeb);
                   }else
                   {
                       // Showing Toast message to user
                       Toast.makeText(MainActivity.this, "Not available for device below Android LOLLIPOP", 
                                                                                                             Toast.LENGTH_SHORT).show();                        
                   }
               }
               else
               {
                   // Showing Toast message to user
                   Toast.makeText(MainActivity.this, "WebPage not fully loaded", Toast.LENGTH_SHORT).show();
               }
           }
  });

• Create an object of PrintJob and create a boolean printBtnPressed which is used to check the status of the printing webpage.

 // object of print job
 PrintJob printJob;

 // a boolean to check the status of printing
 boolean printBtnPressed=false;

• Now create a PrintTheWebPage() method inside MainActivity.java class and Below is the complete code of PrintTheWebPage() method.

   @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
   private void PrintTheWebPage(WebView webView) {
       // set printBtnPressed true
       printBtnPressed=true;

       // Creating  PrintManager instance
       PrintManager printManager = (PrintManager) this
               .getSystemService(Context.PRINT_SERVICE);

       // setting the name of job
       String jobName = getString(R.string.app_name) + " webpage"+webView.getUrl();

       // Creating  PrintDocumentAdapter instance
       PrintDocumentAdapter printAdapter = webView.createPrintDocumentAdapter(jobName);

       // Create a print job with name and adapter instance
       assert printManager != null;

        printJob = printManager.print(jobName, printAdapter,
               new PrintAttributes.Builder().build());

   }

• Next, show the status of the Saving PDF, inside the onResume() method, and check for the status of printing. Below is the complete code of the onResume() method.

   @Override
   protected void onResume() {
       super.onResume();
       if(printJob!=null &&printBtnPressed) {
           if (printJob.isCompleted()) {
               // Showing Toast Message
               Toast.makeText(this, "Completed", Toast.LENGTH_SHORT).show();
           } else if (printJob.isStarted()) {

               // Showing Toast Message
               Toast.makeText(this, "isStarted", Toast.LENGTH_SHORT).show();

           } else if (printJob.isBlocked()) {

               // Showing Toast Message
               Toast.makeText(this, "isBlocked", Toast.LENGTH_SHORT).show();

           } else if (printJob.isCancelled()) {

               // Showing Toast Message
               Toast.makeText(this, "isCancelled", Toast.LENGTH_SHORT).show();

           } else if (printJob.isFailed()) {

               // Showing Toast Message
               Toast.makeText(this, "isFailed", Toast.LENGTH_SHORT).show();

           } else if (printJob.isQueued()) {

               // Showing Toast Message
               Toast.makeText(this, "isQueued", Toast.LENGTH_SHORT).show();

           }

           // set printBtnPressed false
           printBtnPressed=false;

       }
   }

• Below is the complete code for the MainActivity.java file.

Output: Run on Emulator

Resources:

• Download the Complete Project from github
• Download the apk file