I have an application on appspot that works fine through regular browser, however when used through Android WebView, it cannot set and read cookies. I am not trying to get cookies "outside" this web application BTW, once the URL is visited by WebView, all processing, ids, etc. can stay there, all I need is session management inside that application. First screen also loads fine, so I know WebView + server interactivity is not broken.
I looked at WebSettings class, there was no call like setEnableCookies.
I load url like this:
public class MyActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
WebView webview = new WebView(this);
setContentView(webview);
webview.loadUrl([MY URL]);
}
..
}
Any ideas?
If you are using Android Lollipop i.e. SDK 21, then:
CookieManager.getInstance().setAcceptCookie(true);
won't work. You need to use:
CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
I ran into same issue and the above line worked as a charm.
From the Android documentation:
The CookieSyncManager is used to synchronize the browser cookie
store between RAM and permanent storage. To get the best performance,
browser cookies are saved in RAM. A separate thread saves the cookies
between, driven by a timer.
To use the CookieSyncManager, the host application has to call the
following when the application starts:
CookieSyncManager.createInstance(context)
To set up for sync, the host application has to call
CookieSyncManager.getInstance().startSync()
in Activity.onResume(), and call
CookieSyncManager.getInstance().stopSync()
in Activity.onPause().
To get instant sync instead of waiting for the timer to trigger, the
host can call
CookieSyncManager.getInstance().sync()
The sync interval is 5 minutes, so you will want to force syncs
manually anyway, for instance in onPageFinished(WebView, String). Note
that even sync() happens asynchronously, so don't do it just as your
activity is shutting down.
Finally something like this should work:
// use cookies to remember a logged in status
CookieSyncManager.createInstance(this);
CookieSyncManager.getInstance().startSync();
WebView webview = new WebView(this);
webview.getSettings().setJavaScriptEnabled(true);
setContentView(webview);
webview.loadUrl([MY URL]);
I figured out what's going on.
When I load a page through a server side action (a url visit), and view the html returned from that action inside a Webview, that first action/page runs inside that Webview. However, when you click on any link that are action commands in your web app, these actions start a new browser. That is why cookie info gets lost because the first cookie information you set for Webview is gone, we have a seperate program here.
You have to intercept clicks on Webview so that browsing never leaves the app, everything stays inside the same Webview.
WebView webview = new WebView(this);
webview.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url); //this is controversial - see comments and other answers
return true;
}
});
setContentView(webview);
webview.loadUrl([MY URL]);
This fixes the problem.
My problem is cookies are not working "within" the same session. –
Burak: I had the same problem. Enabling cookies fixed the issue.
CookieManager.getInstance().setAcceptCookie(true);
CookieManager.getInstance().setAcceptCookie(true); Normally it should work if your webview is already initialized
or try this:
CookieSyncManager.createInstance(this);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.removeAllCookie();
cookieManager.setAcceptCookie(true);
Related
I have a hybrid application where I have a WebView which is implementing the shouldOverrideUrlLoading method (both the deprecated and the newest version). This should take over control before loading any external links or certain links within my domain. Without going into specifics, the code looks roughtly like this:
private WebView mWebView;
mWebView.setWebViewClient(new myWebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.isExternal() || url.contains("#specialCase")) {
// Do actions
return true;
}
return super.shouldOverrideUrlLoading(view, url);
}
});
I have noticed that all external links work properly, however shouldOverrideUrlLoading is not being called at all when the link is within my domain, so there is no way for me to detect those cases where I want to take over control.
The android documentation states
Give the host application a chance to take over the control when a new
url is about to be loaded in the current WebView.
Does that new mean different domain? Is there anything I am missing or doing wrong? Any ideas on how to detect the user has clicked a link pointing to the same domain?
Thank you in advance.
Finally found the reason why shouldOverrideUrlLoading was never been called.
Apparently the method is only called when the actual loading is about to start. Our web application is a single-page application, hence even though the URL changes, no new page is loaded and shouldOverrideUrlLoading is not called.
I am trying to write an app I want it to open a web page and auto login I am not sure how to go about sending the info to the browser from the app code.
So basically you are going to need to load in the webpage within a WebView (You can find instructions for that here and then probably push javascript into the WebView that will fill in the fields and load the page.
In your activity's onCreate:
WebView webview = new WebView(this);
setContentView(webview);
webView.setWebViewClient(new WebViewClient(){
#Override
public boolean onPageFinished(WebView view, String url) {
// Check here if url is equal to your site URL.
}
});
webview.loadUrl("http://yourwebsite.com/");
This line enables javascript in your WebView:
webView.getSettings().setJavaScriptEnabled(true);
Then you can use the WebViewClient to detect when the page you want has fully loaded. When that happens, you can use:
webView.loadUrl("javascript:document.getElementsByName('username').value = 'username'");
webView.loadUrl("javascript:document.getElementsByName('password').value = 'password'");
webView.loadUrl("javascript:document.forms['login'].submit()");
And it should automatically log you in. It's worth noting that this generally isn't easy to do on a lot of sites since they will randomize the login control ids and it also doesn't generally sit well with users if an application is logging into a website automatically for them.
How do I enable cookies in a webview?
I tried to use
CookieManager.getInstance().setAcceptCookie(true);
just before calling WebView.loadUrl() and it doesn't work as I get an HTML page error from a website saying cookies need to be enabled.
How does cookieManager know which webview to enable cookies?
Say if I had an activity with two webviews in the screen and I only wanted one of those webviews to enable cookies, how is that possible using a CookieManager?
I feel like I am missing something. I could not find a method like webView.setCookieManager or Cookiemanager.setWebView(webview).
You should consider that
CookieManager.getInstance().setAcceptCookie(true);
doesn't work from lollipop(API21) and above. You should check and use appropriate function for that case:
if (android.os.Build.VERSION.SDK_INT >= 21) {
CookieManager.getInstance().setAcceptThirdPartyCookies(mWebView, true);
} else {
CookieManager.getInstance().setAcceptCookie(true);
}
CookieManager.getInstance() is the CookieManager instance for your entire application.
Hence, you enable or disable cookies for all the webviews in your application.
Normally it should work if your webview is already initialized:
http://developer.android.com/reference/android/webkit/CookieManager.html#getInstance()
Maybe you call CookieManager.getInstance().setAcceptCookie(true); before you initialize your webview and this is the problem?
I want to load a web page in my webView.
Tried placing the webView.loadurl("") in AsyncTask's doinbackground / onpostexecute
and in the onresume.
The url is correct but nothing happens it just shows a white page. In the android manifest file internet access is enabled.
What else needs to be done to load a webview?
The application does not crash or show any error.
In my emulator I set the proxy with my user name and password.
Here is the code I use to load the URL:
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClientSubClass());
webView.loadUrl(promoURL);
I would recommend you to check what callbacks your webViewClient is getting. I'm guessing that the site requests an authentication, so override onReceivedHttpAuthRequest and do something like this
#Override
public void onReceivedHttpAuthRequest(WebView view,
HttpAuthHandler handler, String host, String realm) {
Log.d(TAG, "onReceivedHttpAuthRequest"));
handler.proceed(username, password);
}
Or if the authentication isn't the problem you can always overide onReceivedSslError to see if there is some certificate problem.
As the initial step though, I would recommend you to use the browser to see if you can load the page. I'm having some trouble with an https site that requires authentication, I enter my credentials and the site can't load(this is on android 2.3)
myVideoView = (WebView) findViewById(R.id.webView1);
myVideoView.setWebViewClient(new WebViewClientSubClass());
myVideoView.getSettings().setJavaScriptEnabled(true);
myVideoView.setPersistentDrawingCache(0);
myVideoView.getSettings().setPluginsEnabled(true);
myVideoView.requestFocus(View.FOCUS_DOWN);
myVideoView.loadUrl(promoUrl);
try this should work and also check whether it opens with https in normal browser.
I am trying to use a WebView in my Android application. I am creating my webview in code-side (not in XML). My problem is; when I call loadUrl method of webview, the webview goes fullscreen mode. How can I keep the size of the webview for example 200x200 pixels?
If there is any other option instead of webview, of course welcome :)
Thanks,
Quite possibly what you are seeing is not your activity, but the Browser application, because the URL you linked to did a redirect. Use WebViewClient and shouldOverrideUrlLoading() to catch the redirect and send it back to your own WebView.
#Mahtias Lin, please see my code to create and use WebView;
WebView webView = new WebView(this);
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, 416);
WebSettings webSettings = webView.getSettings();
webSettings.setSavePassword(false);
webSettings.setSaveFormData(false);
webSettings.setJavaScriptEnabled(true);
webView.setLayoutParams(p);
webView.loadUrl("http://www.google.com/");
Above code is not set my webview to 416px height.
#CommonsWare, I tried your suggested with following code and amazingly it works, thanks.
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
view.loadUrl(url);
return false;
}
});
But this usage brought some new problems. When I override shouldOverrideURLLoading, the webview displays with no-addressbar, no-navigation (back, forward etc...)?
And also, the webview doenst accept user inputs?
Ok, I am editing my question :)
I searched and I found the following additional set to make webview to able to get inputs;
webView.requestFocus(View.FOCUS_DOWN);
On the other hand, I guess I will create my own back, forward buttons and address-bar for my webview. I will also attach "what happened" to this thread when I create my buttons and address-bar.
Best,
WebView wb=new WebView();
wb.setInitialScale(60);
this is used for set layout of the emulator. 60 means % value. we can use 0% to 100%.
See my reply and comments on
how to show a webview inside an activity in the middle of screen
Apply LayoutParams to your WebView or to the Layout (i.e. LinearLayout) that's surrounding the WebView, if any, i.e. setLayoutParams(LinearLayout.LayoutParams(200, 200));