Develop Reference

WebView loads a google form, link in google form does not open

I have a webview where I perfectly load a google form. In the google form there is a link that redirect to a web page, something like "https://www.google.com/url?q=http://www.mywebsite.com/support/" but no matter what I do I cannot open this link. Everything else work fine.
WebSettings webSettings = supportWebPageWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
supportWebPageWebView.setWebViewClient(new WebViewClient() {
public void onPageStarted(WebView view, String url, Bitmap favicon) {
//do stuff
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, final String url) {
//do stuff
}
});
The only way to make it work is open the link in a browser.
Anyone had the same problem?

I haven't noticed that clicking on the link it opens a new window, the answer is than here Android - Open target _blank links in WebView with external browser

Anchor navigation not working on Samsung Android devices

I'm developing an Android app for reading epub books and I use WebView to display the chapter of the book. Inside the book there are internal links with an anchor. (file://some_path/some_file.html#some_hash). When the user clicks on this internal link the WebView goes to the required anchor on all phones except all Samsung devices.

Have you tried to provide some custom webviewclient, try this, it may help:
myWebView.setWebViewClient(new MyCustomWebViewClient());
...
...
public class MyCusomWebViewClient extends WebViewClient {
public HelloWebViewClient() {}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
}

android webview rendering is showing a White Page

Sometimes, when I load my webview with loadUrl, the website is not showing up until I touch the screen or scroll.
It's like I have a webview drawing problem.
Context context = ctx;
final Dialog dialog = new Dialog(context);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.website);
WebView webView = (WebView) dialog.findViewById(R.id.weburl);
webView.setScrollbarFadingEnabled(false);
//Disable the horizontal scroll bar
webView.setHorizontalScrollBarEnabled(false);
//Enable JavaScript
webView.getSettings().setJavaScriptEnabled(true);
//Set the user agent
webView.getSettings().setUserAgentString("AndroidWebView");
//Clear the cache
webView.clearCache(true);
webView.loadUrl("http://" + WebUrl);
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);
view.setVisibility(View.VISIBLE);
return false; // then it is not handled by default action
}
#Override
public void onPageFinished(WebView view, String url) {
view.refreshDrawableState();
Log.v("FINISH","FINISH");
}
});
Do anybody have an idea why I have this kind of problem.

What version of Android are you testing on? Pre-4.1 versions of Android seem to have this sort problem with WebViews sometimes.
Add this to the manifest for that Activity to fix the problem:
android:hardwareAccelerated="false"

Make WebView invisible in your layout:
<WebView
...
android:visibility="invisible"
.../>
Now, show it back when onPageFinished occurs for the fist time:
webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
if (webView.getVisibility() != View.VISIBLE) {
webView.setVisibility(View.VISIBLE);
}
}
});

I'am not sure, I don't have the whole code, but I think is related to the webViewClient implemented in this function:
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);
view.setVisibility(View.VISIBLE);
return false; // then it is not handled by default action
}
here is the officiel definition:
public boolean shouldOverrideUrlLoading (WebView view, String url)
Try to test with your code without implementing shouldOverrideUrlLoading, or make it return true.

Android WebView navigation

I want to add news and weather app in webview. But jumping to anyther website from webview is not an option. How can I restrict a webview for a certain website.
Thanks.

Create your own WebViewClient:
public class CustomWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.getHost().equals("weather.com")){
// load link
return false;
}else{
// block link
return true;
}
}
}
Use it like this:
webview.setWebViewClient(new CustomWebViewClient());
EDIT Note:
an example of a getHost() function

If I understand the question correctly you might want to implement your own WebViewClient. That will allow you to handle the page navigation. Check out the link for a tutorial from Google.

viewer.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//Block all URL accesses.
return false;
}
});
That should prevent access to anything. You need to handle specific URL's in this function if you want to allow them.

Clicking URLs opens default browser

I have loaded an external URL in my WebView. Now what I need is that when the user clicks on the links on the page loaded, it has to work like a normal browser and open the link in the same WebView. But it's opening the default browser and loading the page there?
I have enabled JavaScript. But still it's not working. Have I forgotten something?

If you're using a WebView you'll have to intercept the clicks yourself if you don't want the default Android behaviour.
You can monitor events in a WebView using a WebViewClient. The method you want is shouldOverrideUrlLoading(). This allows you to perform your own action when a particular URL is selected.
You set the WebViewClient of your WebView using the setWebViewClient() method.
If you look at the WebView sample in the SDK there's an example which does just what you want. It's as simple as:
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}

in some cases you might need an override of onLoadResource if you get a redirect which doesn't trigger the url loading method. in this case i tried the following:
#Override
public void onLoadResource(WebView view, String url)
{
if (url.equals("http://redirectexample.com"))
{
//do your own thing here
}
else
{
super.onLoadResource(view, url);
}
}

Official documentation says, click on a link in a WebView will launch application that handles URLs. You need to override this default behavior
myWebView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
});
or if there is no conditional logic in the method simply do this
myWebView.setWebViewClient(new WebViewClient());

Add this 2 lines in your code -
mWebView.setWebChromeClient(new WebChromeClient());
mWebView.setWebViewClient(new WebViewClient());

The method boolean shouldOverrideUrlLoading(WebView view, String url) was deprecated in API 24. If you are supporting new devices you should use boolean shouldOverrideUrlLoading (WebView view, WebResourceRequest request).
You can use both by doing something like this:
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
newsItem.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
view.loadUrl(request.getUrl().toString());
return true;
}
});
} else {
newsItem.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
}

Arulx Z's answer was exactly what I was looking for.
I'm writing an app with Navigation Drawer with recyclerview and webviews, for keeping the web browsing inside the app regardless of hyperlinks clicked (thus not launching the external web browser). For that it will suffice to put the following 2 lines of code:
mWebView.setWebChromeClient(new WebChromeClient());
mWebView.setWebViewClient(new WebViewClient());
exactly under your WebView statement.
Here's a example of my implemented WebView code:
public class WebView1 extends AppCompatActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView wv = (WebView) findViewById(R.id.wv1); //webview statement
wv.setWebViewClient(new WebViewClient()); //the lines of code added
wv.setWebChromeClient(new WebChromeClient()); //same as above
wv.loadUrl("http://www.google.com");
}}
this way, every link clicked in the website will load inside your WebView.
(Using Android Studio 1.2.2 with all SDK's updated)