How to go back to previous page if back button is pressed in WebView

Question

I have an app in which I have a WebView where I display some websites  It works  clicking a link in the webpage goes to the next page in the website inside my app  But when I click the phone s back button  it takes me straight into my app  I want to go back to the previous page in the website  instead  How can I do this   Here is the code sample I m using   public class Webdisplay extends Activity         Override     public void onCreate Bundle savedInstanceState               TODO Auto-generated method stub         super onCreate savedInstanceState            this getWindow   requestFeature Window FEATURE PROGRESS           setContentView R layout webdisplay            getWindow   setFeatureInt Window FEATURE PROGRESS                  Window PROGRESS VISIBILITY ON             Toast loadingmess   Toast makeText this                   Cargando El Diario de Hoy   Toast LENGTH SHORT           loadingmess show             WebView myWebView           myWebView    WebView  findViewById R id webview           myWebView getSettings   setJavaScriptEnabled true           myWebView loadUrl  http   www elsalvador com            myWebView setWebViewClient new WebViewClient             myWebView setInitialScale 1           myWebView getSettings   setBuiltInZoomControls true           myWebView getSettings   setUseWideViewPort true            final Activity MyActivity   this          myWebView setWebChromeClient new WebChromeClient                          public void onProgressChanged WebView view  int progress                                   MyActivity setTitle  Loading                       MyActivity setProgress progress   100                     if progress    100                      MyActivity setTitle R string app name

User · Answer

You can try this for webview in a fragment   private lateinit var webView  WebView  override fun onCreateView      inflater  LayoutInflater      container  ViewGroup       savedInstanceState  Bundle     View        val root   inflater inflate R layout fragment name  container  false      webView   root   findViewById R id home web view      var url  String    http   yoururl com      webView settings javaScriptEnabled   true     webView webViewClient   WebViewClient       webView loadUrl url      webView canGoBack       webView setOnKeyListener  v  keyCode  event - gt          if keyCode    KeyEvent KEYCODE BACK  amp  amp  event action    MotionEvent ACTION UP              amp  amp  webView canGoBack                 webView goBack               return setOnKeyListener true                   false           return root

User · Answer

here is a code with confirm exit    Override     public void onBackPressed                 if webView canGoBack                 webView goBack             else              new AlertDialog Builder this               setIcon android R drawable ic dialog alert               setTitle  Exit                 setMessage  Are you sure you want to close                 setPositiveButton  Yes   new DialogInterface OnClickListener                                  Override                 public void onClick DialogInterface dialog  int which                        finish                                                       setNegativeButton  No   null               show

User · Answer

I use something like this in my activities with WebViews    Override public boolean onKeyDown int keyCode  KeyEvent event        if  event getAction      KeyEvent ACTION DOWN            switch  keyCode                case KeyEvent KEYCODE BACK                  if  mWebView canGoBack                          mWebView goBack                      else                       finish                                      return true                       return super onKeyDown keyCode  event       Edit   For this code to work  you need to add a field to the Activity containing the WebView   private WebView mWebView    Initialize it in the onCreate   method and you should be good to go   mWebView    WebView  findViewById R id webView

User · Answer

Focusing should also be checked in onBackPressed       Override     public void onBackPressed             if  mWebview isFocused    amp  amp  mWebview canGoBack                  mWebview goBack                     else               super onBackPressed                finish

User · Answer

Why not use onBackPressed      Override public void onBackPressed            super onBackPressed    Do not call me          Go to the previous web page

User · Answer

Override public boolean onKeyDown int keyCode  KeyEvent event           Check if the key event was the Back button and if there s history     if   keyCode    KeyEvent KEYCODE BACK   amp  amp  myWebView canGoBack              myWebView goBack            return true               If it wasn t the Back key or there s no web page history  bubble up to the default        system behavior  probably exit the activity      return super onKeyDown keyCode  event

User · Answer

Webview in Activity Below  code worked for me   Finish the activity the after load the  Url in webview in onbackpressed it go to  the  previous activity    webView    WebView  findViewById R id info webView    webView loadUrl value    finish

User · Answer

You should the following libraries on your class handle the onBackKeyPressed  canGoBack   checks whether the webview can reference to the previous page  If it is possible then use the goBack   function to reference the previous page  go back      Override         public void onBackPressed               if  mWebview canGoBack                    mWebview goBack                 else                Do something else  like trigger pop up  Add rate app or see more app

User · Answer

If using Android 2 2 and above  which is most devices now   the following code will get you what you want    Override public void onBackPressed         if  webView canGoBack              webView goBack          else           super onBackPressed

User · Answer

The first answer by FoamyGuy is correct but I have some additions  low reputations cannot allow me to do comments  If for some reasons your page fails to load  ensure that you set a flag to take note of the failure and then check it on the onBackPressed override  Otherwise your canGoBack   will be forever executed without heading to the actual back activity if it was there     flag with class wide access  public boolean ploadFailFlag   false     your error handling override  Override public void onReceivedError WebView view  WebResourceRequest req  WebResourceError rerr        onReceivedError view  rerr getErrorCode    rerr getDescription   toString    req getUrl   toString         ploadFailFlag   true          note this change                           finally to the answer to this question   Override public void onBackPressed         if checkinWebView canGoBack               if page load fails  go back for web view will not go back - no page to go to - yet overriding the super          if ploadFailFlag               super onBackPressed             else               checkinWebView goBack                   else           Toast makeText getBaseContext     super    Toast LENGTH LONG  show            super onBackPressed

User · Answer

If someone wants to handle backPressed for a webView inside a fragment  then he can use below code    Copy below code into your Activity class  that contains a fragment YourFragmmentName    Override public void onBackPressed     List lt Fragment gt  fragmentList   getSupportFragmentManager   getFragments     boolean handled   false  for Object f  fragmentList        if f instanceof YourFragmentName            handled     YourFragmentName f  onBackPressed            if handled                break                     if  handled        super onBackPressed          Copy this code in the fragment YourFragmentName  public boolean onBackPressed        if  webView canGoBack             webView goBack           return true       else          return false            Notes   Activity should be replaced with the actual Acitivity class you are using  YourFragmentName should be replaced with the name of your Fragment  Declare webView in YourFragmentName so that it can be accessed from within the function

User · Answer

Here is the Kotlin solution   override fun onKeyUp keyCode  Int  event  KeyEvent    Boolean       if  event  action    ACTION UP    event keyCode    KEYCODE BACK            return super onKeyUp keyCode  event             if  mWebView canGoBack              mWebView goBack         else           finish             return true

User · Answer

This is my solution  It works also in Fragment   webView setOnKeyListener new OnKeyListener          Override     public boolean onKey View v  int keyCode  KeyEvent event                if event getAction      KeyEvent ACTION DOWN                        WebView webView    WebView  v               switch keyCode                                case KeyEvent KEYCODE BACK                      if webView canGoBack                                                  webView goBack                            return true                                            break                                   return false

User · Answer

In kotlin   override fun onBackPressed         when           webView canGoBack   - gt  webView goBack           else - gt  super onBackPressed             webView - id of the webview component in xml  if using synthetic reference

User · Answer

Official Kotlin Way   override fun onKeyDown keyCode  Int  event  KeyEvent    Boolean          Check if the key event was the Back button and if there s history     if  keyCode    KeyEvent KEYCODE BACK  amp  amp  myWebView canGoBack              myWebView goBack           return true              If it wasn t the Back key or there s no web page history  bubble up to the default        system behavior  probably exit the activity      return super onKeyDown keyCode  event      https   developer android com guide webapps webview html NavigatingHistory

User · Answer

Full reference for next button and progress bar   put back and next button in webview  If you want to go to back page when click on phone s back button  use this    Override public void onBackPressed         if  webView canGoBack              webView goBack          else           super onBackPressed               You can also create custom back button like this   btnback setOnClickListener new View OnClickListener               Override         public void onClick View v                   TODO Auto-generated method stub              if  wv canGoBack                      wv goBack

User · Answer

use this code to go back on page and when last page came then go out of activity    Override     public void onBackPressed             super onBackPressed            Intent intent new Intent LiveImage this DashBoard class           startActivity intent

[android] How to go back to previous page if back button is pressed in WebView?

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