Develop Reference

WebView shouldOverrideUrlLoading() not called for invalid links

There are two types of links in the HTML file:
(1) A normal link like http://www.bbb.com/q?type=normal
(2) A short link like /q?type=short.
For the first kind, just load the url. For the second kind, I should prepend it with a fixed address like http://www.abc.com before loading the url.
I am trying to do this with overriding the shouldOverrideUrlLoading() function in WebViewClient. However this function doesn't gets called for the second type of link. I tried prepending the "http://www.abc.com" to the second type of links in the HTML file. Then the function does get called when I click the second kind of link.
I think what's happening is WebView will first check if the link is a valid url. Only if it is valid will the function gets called. Am I right? How can I solve this? Thanks in advance.
contentWebView = new WebView(context);
webViewClient = new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// String not in Logger.
Log.d(TAG, "Here!");
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
context.startActivity(intent);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if (hosted) {
contentWebView.setVisibility(VISIBLE);
} else {
summaryTextView.setVisibility(VISIBLE);
articleLinkButton.setVisibility(VISIBLE);
}
progressBar.setVisibility(View.GONE);
}
};
contentWebView.setWebViewClient(webViewClient);
contentWebView.getSettings().setJavaScriptEnabled(true);
contentWebView.loadData(fullString, "text/html", "utf-8");
contentWebView.setVisibility(GONE);
More on this:
I tried changing
contentWebView.loadData(fullString, "text/html", "utf-8");
to
contentWebView.loadDataWithBaseURL("http://www.abc.com", fullString, "text/html", "utf-8", null);
Then the function gets called.
If I change the short link to a full link in the html string manually. Then the function also gets called.
So I think this is probably what is happening: The WebView checks if the link URL is valid. Only when the URL is valid will the shouldOverrideUrlLoading() be called.

You're probably using the KitKat WebView. This is a known issue (I think it's outlined in the migration guide) where URLs that can't be resolved against the base URL are dropped on the floor (you won't get any callbacks for them, neither shouldOverrideUrlLoading nor onPageStarted).
The problem is that your base URL is a data url, so you're trying to resolve '/q?type=short' against 'data:text/html,...' which doesn't make much sense and so the whole attempt to navigate to the URL gets ignored.
This was different for the pre-KK WebView which used KURL instead of GURL for URL processing. GURL is generally more strict (and more secure) than KURL, which is the cause for some incompatibility between the two WebView versions.

Maybe try using onPageStarted method

solution that worked for me was to use loadDataWithBaseURL with an invalid baseUrl and detect that and remove it and replace with "http://" during setWebViewClient
public class MyActivity
extends Activity
{
private static final String badurl = "http://myappname.invalid/";
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
...
WebView wv = ((WebView)findViewById(R.id.webview));
WebSettings settings = wv.getSettings();
settings.setJavaScriptEnabled(false);
settings.setSupportMultipleWindows(true);
wv.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onCreateWindow(WebView view, boolean isDialog, boolean isUserGesture, Message resultMsg)
{
handleUrlview.getHitTestResult().getExtra());
return true;
}
});
wv.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
handleUrl(url);
return true;
}
});
wv.loadDataWithBaseURL(badurl,text,"text/html","utf-8",null);
}
private void handleUrl(String url)
{
if (url.startsWith(badurl))
url = "http://"+url.substring(badurl.length());
try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
} catch (ActivityNotFoundException e) { }
}
}

i faced this problem too and solved it by replacing my html response. In my html response there is no any host in "href" html tags. Then i replaced it following codes and thats working like a charm now :)
String htmlString = AppCache.homePageResponse.showcaase.replace("href=\"/", "href=\"" + "evidea://" );

I found that if your page runs in an iframe, clicking on external (http://www...) links does NOT trigger shouldOverrideUrlLoading() !
See shouldOverrideUrlLoading() not called for external links from iframe

Try this
private static WebView webView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); //should be activity_main
webView = (WebView) findViewById(R.id.web);
webView.setWebViewClient(new webviewclient());
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://www.yahoo.com");
}
public class webviewclient extends WebViewClient{
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
view.loadUrl(request.toString());
return true;
}

Android webview calls browser activity

I'm using webview in android
and when I call loadURL it does a call to the browser activity
I need to show the webcontent inside my own activity as I have other stuff to be viewed in it
buttons, text, ,.. etc

Use the WebView.setWebViewClient(WebViewClient) method ( http://developer.android.com/reference/android/webkit/WebView.html) and override the shouldOverrideUrlLoading(WebView, String) method like this:
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if ( url.equals( "http://www.example.com" ) ) {
// Do something
return true;
}
// If we couldn't match the URL, the following line
// lets the webview use default behaviour (i.e. open browser)
return super.shouldOverrideUrlLoading(view, url);
}
});

How to make links open within webview or open by default browser depending on domain name?

I have WebView in which I want to open links belong to domain www.example.org in webview while all other links (if clicked) open by the default browser outside of my application.
I tried to use public boolean shouldOverrideUrlLoading(WebView view, String url) but it does not work properly.
Here is the code that does not work:
public class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
try {
URL urlObj = new URL(url);
if (urlObj.getHost().equals("192.168.1.34")) {
view.loadUrl(url);
return true;
} else {
view.loadUrl(url);
return false;
}
} catch (Exception e) {
}
}
}
In both cases ( return true and return false) the URL is handled by my application.

Once you create and attach a WebViewClient to your WebView, you have overridden the default behavior where Android will allow the ActivityManager to pass the URL to the browser (this only occurs when no client is set on the view), see the docs on the method for more.
Once you have attached a WebViewClient, returning false form shouldOverrideUrlLoading() passes the url to the WebView, while returning true tells the WebView to do nothing...because your application will take care of it. Unfortunately, neither of those paths leads to letting Android pass the URL to the browser. Something like this should solve your issue:
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
try {
URL urlObj = new URL(url);
if( TextUtils.equals(urlObj.getHost(),"192.168.1.34") ) {
//Allow the WebView in your application to do its thing
return false;
} else {
//Pass it to the system, doesn't match your domain
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
//Tell the WebView you took care of it.
return true;
}
}
catch (Exception e) {
e.printStackTrace();
}
}
I know that seems a little counterintuitive as you would expect return false; to completely circumvent the WebView, but this is not the case once you are using a custom WebViewClient.
Hope that helps!

If you can't be bothered to explain what "does not work properly" means, we can't be bothered to give you much specific help.
Use shouldOverrideUrlLoading(). Examine the supplied URL. If it is one you want to keep in the WebView, call loadUrl() on the WebView with the URL and return true. Otherwise, return false and let Android handle it normally.

Add the following to your activity
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(Uri.parse(url).getHost().endsWith("192.168.1.34")) {
view.loadUrl(url);
Log.d("URL => ", url); // load URL in webview
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent); // Pass it to the system, doesn't match your domain
return true;
}

Android WebView, how to handle redirects in app instead of opening a browser

So right now in my app the URL I'm accessing has a redirect, and when this happens the WebView will open a new browser, instead of staying in my app. Is there a way I can change the settings so the View will redirect to the URL like normal, but stay in my app instead of opening a new browser?
Edit:
I want the redirecting URL, I just don't know how to create it, so the only way to get to that URL is through one that will cause a redirect to the one I want.
For example: When you go here: http://www.amazon.com/gp/aw/s/ref=is_box_/k=9780735622777 notice how it will redirect the URL to the actual product. In my app, if I open it in a new browser, it will do that just fine, however if I keep it in my app with a WebView, it will show up as though it's doing a search for k=9780735622777, like this: http://www.amazon.com/gp/aw/s/ref=is_s_?k=k%3D9780735622777&x=0&y=0 . OR, it will open the view in the browser and show what is appropriate. However, I want to keep everything in my app.

Create a WebViewClient, and override the shouldOverrideUrlLoading method.
webview.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url){
// do your handling codes here, which url is the requested url
// probably you need to open that url rather than redirect:
view.loadUrl(url);
return false; // then it is not handled by default action
}
});

According to the official documentation, a click on any link in WebView launches an application that handles URLs, which by default is a browser. You need to override the default behavior like this
myWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
});

Just adding a default custom WebViewClient will do. This makes the WebView handle any loaded urls itself.
mWebView.setWebViewClient(new WebViewClient());

You will have to set your custom WebviewClient overriding shouldOverrideUrlLoading method for your webview before loading the url.
mWebView.setWebViewClient(new WebViewClient()
{
#SuppressWarnings("deprecation")
#Override
public boolean shouldOverrideUrlLoading(WebView webView, String url)
{
return shouldOverrideUrlLoading(url);
}
#TargetApi(Build.VERSION_CODES.N)
#Override
public boolean shouldOverrideUrlLoading(WebView webView, WebResourceRequest request)
{
Uri uri = request.getUrl();
return shouldOverrideUrlLoading(uri.toString());
}
private boolean shouldOverrideUrlLoading(final String url)
{
Log.i(TAG, "shouldOverrideUrlLoading() URL : " + url);
// Here put your code
return true; // Returning True means that application wants to leave the current WebView and handle the url itself, otherwise return false.
}
});
Checkout the example code for handling redirect urls and open PDF without download, in webview.
https://gist.github.com/ashishdas09/014a408f9f37504eb2608d98abf49500

Create a class that implements webviewclient and add the following code that allows ovveriding the url string as shown below.
You can see these [example][1]
public class myWebClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
On your constructor, create a webview object as shown below.
web = new WebView(this); web.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
Then add the following code to perform loading of urls inside your app
WebSettings settings=web.getSettings();
settings.setJavaScriptEnabled(true);
web.loadUrl("http://www.facebook.com");
web.setWebViewClient(new myWebClient());
web.setWebChromeClient(new WebChromeClient() {
//
//
}

Please use the below kotlin code
webview.setWebViewClient(object : WebViewClient() {
override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
view.loadUrl(url)
return false
}
})
For more info click here

In Kotlin, to navigate within same webView we needed to override the shouldOverrideUrlLoading for webview
If return type is true then navigation will be blocked If return
type is false then navigation will happen
object : WebViewClient() {
override fun shouldOverrideUrlLoading(view: WebView, request: WebResourceRequest): Boolean {
return true
}
}.also { webView.webViewClient = it }

#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (url.equals("your url")) {
Intent intent = new Intent(view.getContext(), TransferAllDoneActivity.class);
startActivity(intent);
}
}

Support for other protocols in Android webview

I've created a web view app, the page that is displayed features market:// links but upon clicking them I get the 404 screen along with the error that the protocol is not supported. I've tried looking through documentation but was unable to find anything relating to this. Any help is much appreciated.

For me the JavaScript thing wasn't a solution as the HTML is not under my control. So if you need to control this from the application side, then there is a relative simple solution: Derive from WebViewClientand inject the implementation using WebView.setWebViewClient(). All you need to override in your WebViewClientimplementation is the shouldOverrideUrlLoading method as shown here:
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url != null && url.startsWith("market://")) {
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
} else {
return false;
}
}
For me this works fine.

HOPE THIS HELPS YOU
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
if (url.startsWith("market://")||url.startsWith("vnd:youtube")||url.startsWith("tel:")||url.startsWith("mailto:"))
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
return true;
}
else{
view.loadUrl(url);
return true;
}
}

For the links to work you have to have the market app installed on your device/emulator.
Also your app need to request a permission to access network.
UPD:
as a workaround you can call java code from within the webview, for example if you generate links like this:
..
Define a javascript function named go():
<script type="text/javascript">
function go(link) {
if (handler) {
handler.go(link);
} else {
document.location = link;
}
}
</script>
You then can pass in a handler object into the WebView:
webview.addJavascriptInterface(new Handler() {
#Override
public void go(String marketUrl) {
//start market intent here
}
}, "handler");
Handler interface can be defined as follows:
public interface Handler{
public void go(String url);
}

Work for me:
webView = (WebView) findViewById(R.id.webView);
webView.setWebChromeClient(new WebChromeClient());
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.getSettings().setPluginState(WebSettings.PluginState.ON_DEMAND);
webView.setWebViewClient(new MyWebViewClient());
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://myweb.com");
private class MyWebViewClient extends WebViewClient {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url != null && url.startsWith("whatsapp://")) {
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
} else {
return false;
}
}
}

It is important to understand how the webview and its clients (webviewclient and webchromeclient) works. Please go through the http://therockncoder.blogspot.in/2014/04/understanding-androids-webchromeclient.html
In the webviewclient's shouldOverrideUrlLoading() method, you can decide if you want to open the link in new browser or within the webview. If you don't override this method, it will by default open the link in a new browser outside of the your android application.
If you want to open within webview, override the method as below
public boolean shouldOverrideUrlLoading(WebView view, String url) { <br>
Log.v("activity", "INSIDE WEBVIEW CLIENT ON shouldOverrideUrlLoading");
view.loadUrl(url);
return false; //need to understand return value based on usage
}
Schemes like whatsapp://send?text=Hello%20World! or market://details?id=xx.xx.xx will open the corresponding apps automatically if they are opened outside the webview and if that app is installed on the handset.
If you want to open certain links within webview and specific schemes outside webview, you need to override WebChromeClients onCreateWindow() method as explained in the link provided above. It should solve the purpose.

Instead of adding check for particular scheme, Modifying #sven solution, this will work for all schemes
public boolean shouldOverrideUrlLoading(WebView view, String url) {
String host= Uri.parse(url).getHost();
if (host == null) {
view.getContext().startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
return true;
}
view.loadUrl(url);
return false;
}

Simplest solution
Intent newApp = new Intent(Intent.ACTION_VIEW, Uri.parse(URL));
startActivity(newApp);