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.
XML
<?xml version="1.0" encoding="utf-8"?><RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <!-- WebView to load webPage --> <WebView android:id="@+id/webViewMain" android:layout_width="match_parent" android:layout_height="match_parent"/> <!-- Button To save the Pdf file when clicked --> <Button android:layout_alignParentBottom="true" android:textColor="#ffffff" android:background="@color/colorPrimary" android:text="Convert WebPage To PDF" android:id="@+id/savePdfBtn" android:layout_width="match_parent" android:layout_height="wrap_content"/> </RelativeLayout> |
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.
Java
import android.content.Context;import android.os.Build;import android.os.Bundle;import android.print.PrintAttributes;import android.print.PrintDocumentAdapter;import android.print.PrintJob;import android.print.PrintManager;import android.view.View;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import android.widget.Toast;import androidx.annotation.RequiresApi;import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { // creating object of WebView WebView printWeb; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Initializing the WebView final WebView webView = (WebView) findViewById(R.id.webViewMain); // Initializing the Button Button savePdfBtn = (Button) findViewById(R.id.savePdfBtn); // Setting we View Client webView.setWebViewClient(new WebViewClient() { @Override public void onPageFinished(WebView view, String url) { super.onPageFinished(view, url); // initializing the printWeb Object printWeb = webView; } }); // loading the URL // 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(); } } }); } // object of print job PrintJob printJob; // a boolean to check the status of printing boolean printBtnPressed = false; @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()); } @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; } }} |
Output: Run on Emulator
Resources:
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