How can I display a pdf document into a Webview

Question

I want to display pdf contents on webview  Here is my code   WebView webview   new WebView this    setContentView webview   webview getSettings   setJavaScriptEnabled true    webview loadUrl  http   www adobe com devnet acrobat pdfs pdf open parameters pdf      I am getting a blank screen  I have set internet permission also

User · Answer

Download source code from here  Open pdf in webview android   activity main xml   lt RelativeLayout android layout width  match parent                  android layout height  match parent                  xmlns android  http   schemas android com apk res android  gt        lt WebView         android layout width  match parent          android background   ffffff          android layout height  match parent          android id    id webview  gt  lt  WebView gt   lt  RelativeLayout gt    MainActivity java  package com pdfwebview   import android app ProgressDialog  import android graphics Bitmap  import android support v7 app AppCompatActivity  import android os Bundle  import android view View  import android webkit WebView  import android webkit WebViewClient   public class MainActivity extends AppCompatActivity        WebView webview      ProgressDialog pDialog        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main        init        listener               private void init              webview    WebView  findViewById R id webview           webview getSettings   setJavaScriptEnabled true            pDialog   new ProgressDialog MainActivity this           pDialog setTitle  PDF            pDialog setMessage  Loading               pDialog setIndeterminate false           pDialog setCancelable false           webview loadUrl  https   drive google com file d 0B534aayZ5j7Yc3RhcnRlcl9maWxl view                private void listener             webview setWebViewClient new WebViewClient                  Override             public void onPageStarted WebView view  String url  Bitmap favicon                    super onPageStarted view  url  favicon                   pDialog show                                Override             public void onPageFinished WebView view  String url                    super onPageFinished view  url                   pDialog dismiss

User · Answer

Opening a pdf using google docs is a bad idea in terms of user experience  It is really slow and unresponsive  Solution after API 21 Since api 21  we have PdfRenderer which helps converting a pdf to Bitmap  I ve never used it but is seems easy enough  Solution for any api level Other solution is to download the PDF and pass it via Intent to a dedicated PDF app which will do a banger job displaying it  Fast and nice user experience  especially if this feature is not central in your app  Use this code to download and open the PDF public class PdfOpenHelper    public static void openPdfFromUrl final String pdfUrl  final Activity activity       Observable fromCallable new Callable lt File gt               Override         public File call   throws Exception               try                  URL url   new URL pdfUrl                   URLConnection connection   url openConnection                    connection connect                        download the file                 InputStream input   new BufferedInputStream connection getInputStream                     File dir   new File activity getFilesDir     quot  shared pdf quot                    dir mkdir                    File file   new File dir   quot temp pdf quot                    OutputStream output   new FileOutputStream file                    byte data     new byte 1024                   long total   0                  int count                  while   count   input read data      -1                        total    count                      output write data  0  count                                      output flush                    output close                    input close                    return file                catch  IOException e                    e printStackTrace                              return null                                subscribeOn Schedulers io                 observeOn AndroidSchedulers mainThread                 subscribe new Subscriber lt File gt                       Override                 public void onCompleted                                          Override                 public void onError Throwable e                                         Override                 public void onNext File file                        String authority   activity getApplicationContext   getPackageName      quot  fileprovider quot                       Uri uriToFile   FileProvider getUriForFile activity  authority  file                        Intent shareIntent   new Intent Intent ACTION VIEW                       shareIntent setDataAndType uriToFile   quot application pdf quot                        shareIntent addFlags Intent FLAG GRANT READ URI PERMISSION                       if  shareIntent resolveActivity activity getPackageManager       null                            activity startActivity shareIntent                                                                For the Intent to work  you need to create a FileProvider to grant permission to the receiving app to open the file  Here is how you implement it  In your Manifest       lt provider         android name  quot android support v4 content FileProvider quot          android authorities  quot   applicationId  fileprovider quot          android exported  quot false quot          android grantUriPermissions  quot true quot  gt            lt meta-data             android name  quot android support FILE PROVIDER PATHS quot              android resource  quot  xml file paths quot    gt        lt  provider gt   Finally create a file paths xml file in the resources foler  lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt paths gt       lt files-path name  quot shared pdf quot  path  quot shared pdf quot   gt   lt  paths gt   Hope this helps

User · Answer

Actually all of the solutions were pretty complex  and I found a really simple solution  I m not sure if it is available for all sdk versions   It will open the pdf document in a preview window where the user is able to view and save share the document   webView setDownloadListener DownloadListener   url  userAgent  contentDisposition  mimetype  contentLength - gt       val i   Intent Intent ACTION QUICK VIEW       i data   Uri parse url       if  i resolveActivity getPackageManager       null                startActivity i         else               val i2   Intent Intent ACTION VIEW              i2 data   Uri parse url              startActivity i2               Kotlin

User · Answer

Use this code   private void pdfOpen String fileUrl            webView getSettings   setJavaScriptEnabled true           webView getSettings   setPluginState WebSettings PluginState ON              ---you need this to prevent the webview from            launching another browser when a url            redirection occurs---         webView setWebViewClient new Callback              webView loadUrl                   http   docs google com gview embedded true amp url     fileUrl               private class Callback extends WebViewClient            Override         public boolean shouldOverrideUrlLoading                  WebView view  String url                return  false

User · Answer

String webviewurl    http   test com testing pdf   webView getSettings   setJavaScriptEnabled true    if webviewurl contains   pdf         webviewurl    http   docs google com gview embedded true amp url     webviewurl           webview loadUrl webviewurl

User · Answer

You can use the Mozilla pdf js project  Basically it will show you the PDF  Take a look at their example   I only use it on the browser  desktop and mobile  and it s working fine

User · Answer

You can use Google PDF Viewer to read your pdf online   WebView webview    WebView  findViewById R id webview   webview getSettings   setJavaScriptEnabled true    String pdf    http   www adobe com devnet acrobat pdfs pdf open parameters pdf   webview loadUrl  https   drive google com viewerng viewer embedded true amp url     pdf

User · Answer

This is the actual usage limit that google allows before you get the error mentioned in the comments  if it s a once in a lifetime pdf that the user will open in app then i feel its completely safe  Although it is advised to to follow the the native approach using the built in framework in Android from Android 5 0   Lollipop  it s called PDFRenderer

User · Answer

If you use the view only url the user is not propted to login to there google account   https   docs google com viewer url http   my domain com yourPdfUrlHere pdf

User · Answer

Here load with progressDialog  Need to give WebClient otherwise it force to open in browser   final ProgressDialog pDialog   new ProgressDialog context       pDialog setTitle context getString R string app name        pDialog setMessage  Loading           pDialog setIndeterminate false       pDialog setCancelable false       WebView webView    WebView  rootView findViewById R id web view       webView getSettings   setJavaScriptEnabled true       webView setWebViewClient new WebViewClient              Override         public void onPageStarted WebView view  String url  Bitmap favicon                super onPageStarted view  url  favicon               pDialog show                        Override         public void onPageFinished WebView view  String url                super onPageFinished view  url               pDialog dismiss                          String pdf    http   www adobe com devnet acrobat pdfs pdf open parameters pdf       webView loadUrl  https   drive google com viewerng viewer embedded true amp url     pdf

[android] How can I display a pdf document into a Webview?

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