Android webview not loading https url - posted in Newbie Questions: When try to load url (with https) in webview. The android. Android’s WebView allows you to integrate a webpage as a part of the app. Using WebView to load url: 7. GitHub Gist: instantly share code, notes, and snippets. or book our full all-inclusive WeSetupYourWebViewApp service. Read rendered documentation, see the history of any file, and collaborate with contributors on projects across GitHub. Mobile App Development & Android Projects for £10 - £20. The default behavior of Android is to open device browser, when links are clicked. In this step, go to cs page, insert the code given below in MainActivity. HashMap; import. Webview example,filechooser in webview,camera option in webview,back url webview,open link in new browser webview,show progress Dialog webview, WebChromeClient,WebViewClient,take photo from camera and select for file upload. WebView; import java. These instructions are necessary if you wish to run the WebView code as an Android system component (which is useful when working on performance or application compatibility). AppCompatActivity; import android. Android - WebView - WebView is a view that display web pages inside your application. com) a aplicação realize determinada ação (exemplo: deixar botão de visível). I want to display video in android app. The UWP WebView uses the Microsoft Edge rendering engine. You can add it using Android studio drag-drop or in XML code directly. revokeObjectURL() Revokes an object URL previously created using URL. Once the url loads fully then my first > screen which contains progress bar and image should move away and new > screen with loaded url comes up. Welcome to nhancv's website. I have a Webview with a button hide, so, I need when the "Webview" reaches a certain url the button unhide, anyone has any idea how to do that?. Android WebView displays HTML content from a URL or html text. If a Blob, File, or Uint8Array isn't available, you can use the putString() method to upload a raw, base64, base64url, or data_url encoded string to Cloud Storage. xda-developers App Development Forums Development Tools Android Studio webview showing the already loaded url and not showing the presently loading URL by amitbec FORUMS Android Studio. The default behavior of Android is to open device browser, when links are clicked. newEmailIntent(mainActivity. java Find file Copy path Fetching contributors…. The WebView component is a full-fledged browser implemented as a View subclass so you can embed it inside your Android app's GUI anywhere you like. Can be a local or remote file. The default behavior of the Android system is to launch a browser application, To override this behavior for android webview and open the URL in our own android webview. WebView is a view that display web pages inside your application. Sederhananya, WebView itu seperti android browser,tetapi tidak mempunyai address bar untuk memasukkan URL ,karena URL sudah kita didefinisikan dalam aplikasi android tersebut. Sign in - Google Accounts. We can use loadUrl() method to load URL in WebView. Step 1: Create an Android Project If you do not already have an app you are working with, start a new Android project in Eclipse. Gingerbread から Android を触り続けて、たぶん5年くらい。 ネイティブのアプリ作るのは困らないくらいの Android エンジニアになりました、わーい。 で、この間お仕事でちょっと WebView を触らなければいけなくなった。 まぁ. Activity; import android. WebViewClient and show inside app’s ActionBar TitleBar. package com. Android’s WebView allows you to integrate a webpage as a part of the app. For post data to web-view using Android. so we have to create a client for override this behavior to load the clicked link within your WebView and also can be navigate backward and forward through the web page history that's maintain by your. So that we should use web view to view the PDF files in Android. So if the webview issue is solved it will be very helpful. Downloading a pdf over blob link inside webview. The code sharing concept is used in Xamarin, basically. and already fullowed instructions in Webview. clearCache(true); } }. AlarmClock; BlockedNumberContract; BlockedNumberContract. Google Play Protect, regular security updates, and control over how your data is shared. OAuth is an open standard for authorization. If you click the link in the web page by default it will launch the web browser and loads the appropriate URL. Android and Java solution provide free tutorial for android and java. java WevFragment. Click Inspect next to the URL that you just opened. 最全面总结 Android WebView与 JS 的交互方式 手把手教你构建 Android WebView 的缓存机制 & 资源预加载方案 你不知道的 Android WebView 使用漏洞. Additionally, this plugin makes it easy to use HTML5 style routing that web. The web page can be loaded from same application or URL. Java Project Tutorial - Make Login and Register Form Step by Step Using NetBeans And MySQL Database - Duration: 3:43:32. This class is the basis upon which you can roll your own web browser or simply use it to display some online content within your Activity. * * "Android WebView Demo" is distributed in the hope that it will be useful,. createObjectURL, WebView Android No support No:. I have a server that creates an object blob on the browser and I want to download this within WebView in an Android app. then(function(snapshot) { console. The app was working in simulator (weburl printing fine in console) and webview was loading in iPhone simulator. This guide gets you started building Chrome Apps with the AngularJS MVC framework. com/p/android/issues/detail?id=17535#c100 - AssetIncludeWorkaround. The WebView tries to load the original URL from the remote server, and gets a redirect to a new URL. Tampilan yang menampilkan halaman web. log('Uploaded a raw string!');. This example explains horizontal ProgressBar and ProgressBar dialog with WebView. Complete source code in Github. WebView - URL mechanism is broken - passing parameters does not work. receiving fewer calls to these callbacks or failing to load resources on android 4 (webview view, string url). BlockedNumbers; Browser; CalendarContract; CalendarContract. Webview is an android widget in which you can load web pages inside your application. */ inflater. WebView; import java. Using web-view and embed android barcode scanner to your existing website. and already fullowed instructions in Webview. Step 2 – Add a button , a editText and WebView in the main activity as shown in the picture below. So lets create a project. ShouldOverrideUrlLoading(WebView, IWebResourceRequest) ShouldOverrideUrlLoading(WebView, IWebResourceRequest) ShouldOverrideUrlLoading(WebView, String) ShouldOverrideUrlLoading(WebView, String) Give the host application a chance to take over the control when a new url is about to be loaded in the current WebView. com hanya perlu menyentuh icon badoystudio yang sudah terinstall dismartphone android. In your app's main Activity class, or whatever Activity you want to display images within, add the following import statements before your class declaration opening line:. Remarks Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2. WebView comes with all the features that of a desktop browser like managing history, cookies, HTML5 support and lot more. The WebView solution that just works. How to detect hyperlink click in a webview android with C#. clearCache(true); } }. On iOS it all works and looks fantastically. Android WebView Load "https" URL. Enable Javascript for WebView: 4. I discovered that this is not supported by webview, so I have tried implementing this solution: Download Blob file from Website inside Android WebViewClient. The web page can be loaded from same application or URL. Activity; import android. 6) and above. Put your html and css file inside the Assets folder. In ths example : : 1. Returns a DOMString containing a unique blob URL, that is a URL with blob: as its scheme, followed by an opaque string uniquely identifying the object in the browser. java [code]WebView webview = (WebView) findViewById(R. I found the setWebViewClient method and it kept the website within the WebView inside of the app versus launching the default browser. By default, when a project is created in Android Studio a file called ic_launcher. Activity; import android. By continuing to browse this site, you agree to this use. Mark Murphy; Re. -I had Google for Blob URL but I hvnt find a solution OR Any hint so I have to post Question HERE. The WebView Control is used to view the web pages in Android apps. Let url be the result of parsing URL’s path[0]. The following are Jave code examples for showing how to use getUrl() of the android. android webview重新装载url,只需要再写一次loadurl即可,你可以监听页面是否加载完,提示一个加载进度条。. Return a new opaque origin, if url is failure, and url’s origin otherwise. What is the URL length limit? If URL length is 57751 the data is loaded but is length is 177263 data is not loaded. So that we should use web view to view the PDF files in Android. On Android, this can only be used with GET requests. rangav changed the title Video url returning as blob: in Android WebView Video Url returning as blob: in Android WebView Apr 2, 2019. A VirtualMachine represents a Java virtual machine to which this Java vir. androidcodesnippets; import android. The url schemes like intent://, market://, app://, mail:// etc are special URL schemes in the webview that can be used to open apps, invoke an android activity or do an action etc, for example, the mail:// url scheme can be used to send email action directly from the webview. Opening url. setDownloadListener(new DownloadListener() { public void onDownloadStart(String url, String… This site uses cookies for analytics, personalized content and ads. Here's the code:. WebViewでアプリ内のHTMLファイルを読み込む手順とコードを紹介します。 プロジェクトの作成 Android アプリケーションプロジェクトを作成します。 [New Android Application]ダイアログボックスが表示されますので、以下を設定します。 Application Name: "WebViewLocalFile". You can add it using Android studio drag-drop or in XML code directly. For more information about why you might choose this approach, read this blog post. Open Solution Explorer Window. abtus_webView); webview. The WebView checks if the system can handle a view intent for the URL, if so the system handles the URL navigation, otherwise the WebView will navigate internally (i. Open new link from webview to external browser. " so I can share my Bing map to another browsers and run well. android, examples. This example demonstrates how do I display progress bar while loading a url to webview in android. rangav changed the title Video url returning as blob: in Android WebView Video Url returning as blob: in Android WebView Apr 2, 2019. A Web View plugin for Cordova, focused on providing the highest performance experience for Ionic apps (but can be used with any Cordova app). In this tutorial we will learn How to use WebView in Android Using Android Studio. android webview加载url异常 [问题点数:100分,无满意结帖,结帖人u012046670]. Read More Android Session Management Using SharedPreferences - Android Example. How to load url in webview. Obsolete: Creating blobs with BlobBuilder. If there are any apps using WebView, you see a section for each of those apps, too. This site uses cookies for analytics, personalized content and ads. WebView web_view; When the WebView is asked to load a URL, it will by default delegate the request to the default browser. Como descargar desde una url blob:https a un WebView. I'm trying to load a URL in an android WebView, which is in a Fragment. On Android (tested with v4. The default behavior of the Android system is to launch a browser application, To override this behavior for android webview and open the URL in our own android webview. See the WebView widget's Dartdoc for more details on how to use the widget. How to load a local webpage using WebView (It is the same html code for iOS and Android)? This site uses cookies for analytics, personalized content and ads. I had the same issue and I fixed it setting the WebChromeClient for the WebView and load the URL using. With an Android WebView, you can show website in android application. On Android, this can only be used with GET requests. The problem is that when I add the link to a android WebView I show only the map without my route on it. Load static html file into WebView: 9. Hello, Geeks. Android WebView Load "https" URL. Web View = Create an Android Web View Application, whicht uses the Razor templating engine. Webview is a view that is used for displaying HTML content or web content in your app. OAuth2 authorization uses access token to access APIs instead of using username and password. Android WebView Content Measuring. This example demonstrates how do I display progress bar while loading a url to webview in android. Webview example,filechooser in webview,camera option in webview,back url webview,open link in new browser webview,show progress Dialog webview, WebChromeClient,WebViewClient,take photo from camera and select for file upload. I import a. In your app's main Activity class, or whatever Activity you want to display images within, add the following import statements before your class declaration opening line:. Downloading file from android webview Here we will see how to download a file from android webview over http. HashMap; import. Download Manager and Download Listener are responsible for performing this function. Solo te toma un minuto registrarte. xda-developers App Development Forums Development Tools Android Studio webview showing the already loaded url and not showing the presently loading URL by amitbec FORUMS Android Studio. Importance Of Android WebView. The code sharing concept is used in Xamarin, basically. For this tutorial you will need little background of how to use Webview layout, you can check that in our previous tutorials: “Using WebView with Multi-touch – Android Tutorial”. This example demonstrates how do I display progress bar while loading a url to webview in android. In this example opening url in webview and showing progress Dialog for page. Show file chooser option on clicking file option for web form. A VirtualMachine represents a Java virtual machine to which this Java vir. gpx file in my places of Bing map. method (string) - The HTTP Method to use. What is the URL length limit?. simple webview app to open my url signed for publish on google. getBody(), mt. It is no longer possible to launch an Android app by setting an iframe's src attribute. * * "Android WebView Demo" is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, version 3. Launch an url internally within the app. クリアテキスト設定自体は、Android 6から使用可能ですが、WebViewに適用されるのはAndroid 7からです。 また、Android 9では、デフォルトでクリアテキストが無効になっているため、HTTP通信できません。. 1) Using Javascript In this approach, url will be loaded by webview itself. I have a Webview with a button hide, so, I need when the "Webview" reaches a certain url the button unhide, anyone has any idea how to do that?. These are instructions for building the Android WebView. By using other methods of FileReader, it is possible to read the contents of a Blob as a string or a data URL. [android-developers] How to load url in webview. Here's the code:. Web-view is containers like scrollView, ListView etc in Android app development. The android. If you are downloading over https (ssl) then refer to this tutorial : Downloading file from android webview over https (ssl). Create a layout file for the WebView, activity_webview. Android - WebView - WebView is a view that display web pages inside your application. You need first to create a class that extends ListActivity, and then put this code:. Android Platform; Android Support Library; AndroidX; AndroidX Test; AndroidX Constraint Layout; Architecture Components; Android Automotive Library; Databinding Library; Constraint Layout Library; Material Components; Test Support Library; Wearable Library; Play Billing Library; Play Core Library; Play Install Referrer Library; Android Things. Welcome to nhancv's website. I do not want to use. android webview重新装载url,只需要再写一次loadurl即可,你可以监听页面是否加载完,提示一个加载进度条。. Android Platform; Android Support Library; AndroidX; AndroidX Test; AndroidX Constraint Layout; Architecture Components; Android Automotive Library; Databinding Library; Constraint Layout Library; Material Components; Test Support Library; Wearable Library; Play Billing Library; Play Core Library; Play Install Referrer Library; Android Things. Fix ERR_UNKNOWN_URL_SCHEME on Android WebView for tel:\sms:\geo:\etc links Posted on September 17, 2015 by Marius Bancila I am building a hybrid mobile app with Visual Studio Tools for Apache Cordova that is able to make phone calls, send text message or emails, view a location on a map, etc. Android Browser - WebView - Complete Tutorial Series Part 3 - Adding Swipe Refresh, URL Share, etc to refresh layout to our WebView and also adding WebView URL share through Android Share. The WebView Control is used to view the web pages in Android apps. -I had Google for Blob URL but I hvnt find a solution OR Any hint so I have to post Question HERE. The problem is that when I execute loadUrl the native browser opens with the URL. The following code reads the content of a Blob as text: var text = await (new Response(blob)). Except as otherwise noted, the content of this page is licensed under a Creative Commons Attribution 2. Output After a few seconds, the app will start running on your phone. Using WebView to load static html string: 8. android / platform / frameworks / webview / 8ae9c440cb8835fd8d95c51674b11b3857fc6885 /. In addition to this inconvenience, we do not know if this link will still be valid when the user clicks it. 하지만 webview에서는 작동하지 않는다 그렇게 때문에 페이지전환 전에 url을 가로채서 전화, 문자, 파일다운로드 구. so webview will manage cookies and http session automatically. I am developing an app in that when a user navigates from one link to another link I want to change the content of the edittext and want to show current url in the edittext. The ability to. On Medium, smart voices and original ideas take center stage - with no ads in sight. If you are downloading over https (ssl) then refer to this tutorial : Downloading file from android webview over https (ssl). 이 버튼들을 눌렀을 때 도달할 URL이 민감한(?) 화면일 수 있기 때문. The problem is that when I add the link to a android WebView I show only the map without my route on it. In this example opening url in webview and showing progress Dialog for page. 接下来我会继续讲解其他安卓开发的知识,感兴趣的同学可以继续关注本人运营的Wechat Public Account:. Afterwards, go to. Put your html and css file inside the Assets folder. In this tutorial (post) i am going to explain how we can open an website or url in a web view pragmatically. We will display a webpage and locally build content - a HTML page fragment. It is used to display online content in android activity. We’re dedicated to securing Android’s 2. All your code in one place. Examina otras preguntas con la etiqueta android html android-studio o formula tu propia pregunta. You can now include a WebView widget in your widget tree. A Java virtual machine. device/aaeon/upboard device/amlogic/yukawa Bug: 122486287. Create a layout file for the WebView, activity_webview. Downloading file from android webview Here we will see how to download a file from android webview over http. Sencha TouchのWebViewでカスタムURLスキームを使えるようにする方法(Android) Updated 2013/12/23 以前の記事「 独自形式のURLのリンクからSencha Touchアプリを起動する方法(Android) 」で説明したカスタムURLスキームは、そのままではブラウザーで表示しないと使えませ. Android - WebView - WebView is a view that display web pages inside your application. Provide details and share your research! But avoid …. java Find file Copy path Fetching contributors…. The ability to. In this android code tutorial we are going to learn how to load external web page inside android WebView. Android WebView with https loadUrl shows blank/empty page I recently encountered this problem while trying to develop a WebView that is supported on Doughnut (1. Working with WebView: displaying web content inside your Android app (WebView view, String url) { //Check whether the URL contains a whitelisted domain. and already fullowed instructions in Webview. 14 20:24 여기서 단순 브라우저 노출에서 그칠 것이 아니라 마케팅의 일환로써도 URL Scheme 값을 사용, JavaScript 로 만든 앱 설치 유무를 판별하고 서로 다른 Landing 효과를 누릴 수 있는 페이지도. Usually we open an url by using intent which forces us to open the url in android browser. Read More Android Session Management Using SharedPreferences - Android Example. abtus_webView); webview. This returns a blob, which I then save as a Png. Your votes will be used in our system to get more good examples. package com. It's free to sign up and bid on jobs. Android - WebView - Tutorialspoint. I want to store large files in a DB2 database and I need more information about which is the best technique to use as I am new in this IBM product (previous experience with T-SQL only). AndroidのWebViewでlocalhostにアクセスする場合のURL 例えばAndroid向けのWEBアプリをローカルのXAMPPで下ごしらえしている時とかに. If it does match, then the method returns false in order to not override the URL loading (it allows the WebView to load the URL as usual). Android WebView Example. Click Run option. Handling URL with Android WebView When an mCent member clicks a link to start an offer, the member will need to go from mCent, to browser, then finally to Google PlayStore. And use the following code. There is no layout design in the application. 0 - Root & Universal Systemless Interface [Android 4. I am working on developing an Android application, in which I want to open a URL in WebView. Android developer can load html( Hyper text mark-up language ) files through assets folder all you have to do is put designed html file inside assets folder and set into webview. 1 and I have the following problem: Trying to load a URL in a WebView using webView. Buy WebViewGold for iOS – WebView URL/HTML to iOS app + Push, URL Handling, APIs & much more! by onlineappcreator on CodeCanyon. Prerequisites. Android :: Load URL In Background In WebView Jul 6, 2009 What i want is when first time application runs then it should show only image in the full screen and one progress bar. We’re going to create a “hybrid” mobile app by displaying a website, using the WebView component, in an Android app. On Android (tested with v4. 如果希望浏览的网页后退而不是退出浏览器,需要WebView覆盖URL加载,让它自动生成历史访问记录,那样就可以通过前进或后退访问已访问过的站点。. Let's say something about android webview, when we open webpage in an andorid application, the http header would some how add a field named x-requested-with to show your app's package name. Olá! Estou fazendo alguns testes em minha aplicação android e em uma determinada activity pretendo colocar uma webview. All your code in one place. Read More Android Session Management Using SharedPreferences - Android Example. I want to store large files in a DB2 database and I need more information about which is the best technique to use as I am new in this IBM product (previous experience with T-SQL only). So here is the complete step by step tutorial for Load local html file in webview on android. Sencha TouchのWebViewでカスタムURLスキームを使えるようにする方法(Android) Updated 2013/12/23 以前の記事「 独自形式のURLのリンクからSencha Touchアプリを起動する方法(Android) 」で説明したカスタムURLスキームは、そのままではブラウザーで表示しないと使えませ. Fix ERR_UNKNOWN_URL_SCHEME on Android WebView for tel:\sms:\geo:\etc links Posted on September 17, 2015 by Marius Bancila I am building a hybrid mobile app with Visual Studio Tools for Apache Cordova that is able to make phone calls, send text message or emails, view a location on a map, etc. WebView; do something like this to replace the string that it gets from the URL. Marcus Baffa How can I load an external html page in a WebView, originally with visiblitiy=gone, and maaintain it as it was. By default, when a project is created in Android Studio a file called ic_launcher. I am unable to activate/promt for the device camera when opening a WebView url that requests the media device. The link of video is blob link so that i think i need use webview to display it. If non-null, this must be a valid URL. The WebView solution that just works. Downloading file from android webview Here we will see how to download a file from android webview over http. clearCache(true); } }. Since Froyo(API Level 8), the webview starts providing an interface for us to send extra HTTP headers when loading a URL. Our example application shows how to use Android WebView component. In this tutorial, you would learn about Downloading File inside Android WebView. Click Run option. Open new link from webview to external browser. Android Server/Client example - server side using ServerSocket Android NFC example, to read tag info of RFID key and card Bluetooth LE Gatt Example, step-by-step. It replaces web view and web view is not available on Play Store as an independent app to install / update separately. 早速WebViewを画面に設置してみましょう。 下記のサンプルでは、WebViewに表示するサイトのURLも同時に設定しています。 後は、他のViewの設置方法と変わらないので、とてもシンプルにWebViewを配置する事が出来ます。. simple webview app to open my url signed for publish on google. In Android, WebView is a view used to display the web pages in application. 하지만 webview에서는 작동하지 않는다 그렇게 때문에 페이지전환 전에 url을 가로채서 전화, 문자, 파일다운로드 구. In this article, we will learn How to handle the file download for a Web View using Kotlin Programming Language? If you are looking for a Java Version for this article, then you need to check this article. For that this post helps you to achieve that. The page opens in a new tab on your Android device. The following code reads the content of a Blob as text: var text = await (new Response(blob)). I have a website that is navigated from within a webview. Opening a window. 如果希望浏览的网页后退而不是退出浏览器,需要WebView覆盖URL加载,让它自动生成历史访问记录,那样就可以通过前进或后退访问已访问过的站点。. 0 - Root & Universal Systemless Interface [Android 4. setWebViewClient(new WebViewClient() { @Override public void onPageFinished(WebView view, String url) { webView. 0 NougatWebView component will actually become a part of Chrome to bring in more data and memory efficiency. 5 license, and examples are licensed under the BSD License. Since the default Google App Engine app and Firebase share this bucket, configuring public access may make newly uploaded App Engine files publicly accessible as. Androidではウェブページを表示するためのビューとして WebView が用意されています。 このビューはURLを渡すだけでウェブページを表示することができ、また設定すればjavascriptも使えます。 ここで WebView を使ってページを表示する手順とそのコードを紹介し. Apps How to allow file upload and download in webview? import android. Video is not playing in Webview in andorid. Create a layout file for the WebView, activity_webview. Thanks, Jayanth. Customize and improve how users browse the web. Fix ERR_UNKNOWN_URL_SCHEME on Android WebView for tel:\sms:\geo:\etc links Posted on September 17, 2015 by Marius Bancila I am building a hybrid mobile app with Visual Studio Tools for Apache Cordova that is able to make phone calls, send text message or emails, view a location on a map, etc. HashMap; import. How To Open And Show Pdf File From Url Using Native Webview - posted in Android: I have developed a small app that displays (among others) a mobile website using the native webview. Not able to load relative path URL in. In this tutorial we are making simple android application with the combination of WebView in it but we are covering more important topic inside this project which is Getting current opening URL and Webpage Title( Which we will open inside android app using WebView ) and display that Title. com/p/android/issues/detail?id=17535#c100 - AssetIncludeWorkaround. Opening a window. We can use loadUrl() method to load URL in WebView. Handling URL with Android WebView When an mCent member clicks a link to start an offer, the member will need to go from mCent, to browser, then finally to Google PlayStore. In this android code tutorial we are going to learn how to load external web page inside android WebView. With an Android WebView, you can show website in android application. Android WebView component is a full-fledged browser implemented as a View subclass to embed it into our android application. The WebView class is an extension of Android's View class that allows you to display web pages as a part of your activity layout. One example is WebView, views which can be embedded in your Activities and used to display Web pages. [android-developers] How to load url in webview. Purpose of WebView is if you want a web application or just a web page in your app. WebView web_view; When the WebView is asked to load a URL, it will by default delegate the request to the default browser. ?) May 10, 2015 danielweck referenced this issue May 10, 2015. Android WebView is used to display web pages in our android application. You need first to create a class that extends ListActivity, and then put this code:. Como descargar desde una url blob:https a un WebView. For example a button element in the new WebView is given an orange outline: In the old webview a highlight color is applied on top of certain elements:. AndroidのWebViewでlocalhostにアクセスする場合のURL 例えばAndroid向けのWEBアプリをローカルのXAMPPで下ごしらえしている時とかに. Want to use OneSignal SDK with URL deeplinking from your push notifications which will open the URL in your Android WebView app after clicking on the push notification? Yeah, this is how to do it: Download the WebViewGold template for Android Studio here. " and "Let others copy items from this list of places. extends WebViewClient and check the url: 6. Load Remote URL on WebView. How to Load HTML Data/String on Android WebView Application Implementing Navigation Back Feature to Android WebView Application.