How to Display Pdf Inside Webview in Android

Can not open PDF file using WebView

There some issue while loading pdf with webView. You can use the following code to solve your problem. This method takes the help of drive to view pdf in webView.Finally let me know if your problem solved or not

webview.getSettings().setJavaScriptEnabled(true); 
    String pdf = "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf";
    webview.loadUrl("https://drive.google.com/viewerng/viewer?embedded=true&url=" + pdf);

How to open pdf files in webview in pdfactivity?

BINGO!! My issue resolved can open pdf directly using BufferedInputStream

I created two activity, First Activity to load all pdfs in webview. When user clicks the link of pdf, the pdfurl fetches the url as strings, passes strings to next activity.
PdfActivity.java

   final String pdfurl = view.getHitTestResult().getExtra();
         Intent intent = new Intent(PdfActivity.this,PdfViewer.class);
         intent.putExtra("PDFURL",pdfurl);
         startActivity(intent);

Second Activity is PdfViewer, bateksc pdfviewer to load pdf from url, edited as above
PdfViewer.java

package ak.wp.meto.activity;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.TextView;
import android.widget.Toast;
import com.github.barteksc.pdfviewer.PDFView;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import ak.wp.meto.R;

public class PdfViewer extends Activity {
    private TextView txt; // You can remove if you don't want this
    private PDFView pdf;
    String value = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_custom_pdf);
        Bundle bundle = getIntent().getExtras();
        if (bundle != null) {
            value = bundle.getString("PDFURL");
        }
        System.out.println("PRINT PDFVIEWER DATA" +value);
        pdf = (PDFView) findViewById(R.id.pdfView); //github.barteksc
        txt = findViewById(R.id.txtPdf);
        String pdfUrl = value;
        try{
            new RetrievePdfStream().execute(pdfUrl);
        }
        catch (Exception e){
            Toast.makeText(this, "Failed to load Url :" + e.toString(), Toast.LENGTH_SHORT).show();
        }
    }

    class RetrievePdfStream extends AsyncTask<String, Void, InputStream> {
        @Override
        protected InputStream doInBackground(String... strings) {
            InputStream inputStream = null;
            try {
                URL url = new URL(strings[0]);
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                if (urlConnection.getResponseCode() == 200) {
                    inputStream = new BufferedInputStream(urlConnection.getInputStream());
                }
            } catch (IOException e) {
                return null;
            }
            return inputStream;
        }
        @Override
        protected void onPostExecute(InputStream inputStream) {
            pdf.fromStream(inputStream).load();
        }
    }

}

i want to show pdf file in Android Activity with WebView but after run project nothing show up

As the user @CommonsWare say, you can't open a PDF in the webview.
The best solution would be download it and send it across an intent to a PDF dedicated reader app the user should have, or implement a special class to open it inside your own app.

Android - Load PDF inside webview

This could be as simple as:

try
{
 Intent intentUrl = new Intent(Intent.ACTION_VIEW);
 intentUrl.setDataAndType(url, "application/pdf");
 intentUrl.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 myActivity.startActivity(intentUrl);
}
catch (ActivityNotFoundException e)
{
 Toast.makeText(myActivity, "No PDF Viewer Installed", Toast.LENGTH_LONG).show();
}

though I've not tried this.

In our apps, we DOWNLOAD the PDF to the apps file system, make it world readable, then pass the path in an Intent to open a PDF viewing app (e.g. Acrobat Reader). Please note that you'd also need to also be concerned with cleaning up these downloaded PDF's!

in your try block put

new DownloadPDFTask().execute(url);

DownloadPDFTask class:

public class DownloadPDFTask extends AsyncTask<String, Void, Integer> 
{
    protected ProgressDialog mWorkingDialog;    // progress dialog
    protected String mFileName;         // downloaded file
    protected String mError;            // for errors

    @Override
    protected Integer doInBackground(String... urls)
    {

     try
     {
      byte[] dataBuffer = new byte[4096];
          int nRead = 0;

          // set local filename to last part of URL
          String[] strURLParts = urls[0].split("/");
          if (strURLParts.length > 0)
            mFileName = strURLParts[strURLParts.length - 1];
          else
                mFileName = "REPORT.pdf";

          // download URL and store to strFileName

          // connection to url
      java.net.URL urlReport = new java.net.URL(urls[0]);
          URLConnection urlConn = urlReport.openConnection();
          InputStream streamInput = urlConn.getInputStream();
          BufferedInputStream bufferedStreamInput = new BufferedInputStream(streamInput);
          FileOutputStream outputStream = myActivity.openFileOutput(mFileName,Context.MODE_WORLD_READABLE); // must be world readable so external Intent can open!
          while ((nRead = bufferedStreamInput.read(dataBuffer)) > 0)
                outputStream.write(dataBuffer, 0, nRead);
          streamInput.close();
          outputStream.close();
      }
      catch (Exception e)
      {
       Log.e("myApp", e.getMessage());
       mError = e.getMessage();
       return (1);
      }

     return (0);
    }

    //-------------------------------------------------------------------------
    // PreExecute - UI thread setup
    //-------------------------------------------------------------------------

    @Override
    protected void onPreExecute()
    {
     // show "Downloading, Please Wait" dialog
     mWorkingDialog = ProgressDialog.show(myActivity, "", "Downloading PDF Document, Please Wait...", true);
     return;
    }

    //-------------------------------------------------------------------------
    // PostExecute - UI thread finish
    //-------------------------------------------------------------------------

    @Override
    protected void onPostExecute (Integer result)
    {
         if (mWorkingDialog != null)
      {
       mWorkingDialog.dismiss();
       mWorkingDialog = null;
      }

         switch (result)
         {
         case 0:                            // a URL

            // Intent to view download PDF
            Uri uri  = Uri.fromFile(myActivity.getFileStreamPath(mFileName));

            try
            {
                Intent intentUrl = new Intent(Intent.ACTION_VIEW);
                intentUrl.setDataAndType(uri, "application/pdf");
                intentUrl.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                myActivity.startActivity(intentUrl);
            }
            catch (ActivityNotFoundException e)
            {
                Toast.makeText(myActivity, "No PDF Viewer Installed", Toast.LENGTH_LONG).show();
            }

            break;

        case 1:                         // Error

            Toast.makeText(myActivity, mError, Toast.LENGTH_LONG).show();
            break;

        }

    }

}

any reference to "myActivity" must be replaced with a reference to your Activity class

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