Webview not showing JavaScript alerts

Question

We built a hybrid application using android webview and I use my phone (LG Nexus 4) to test it. The android application used to show JavaScript alerts from the website properly earlier but lately it has stopped showing the same.

It is throwing the following error whenever an alert is to be thrown from the application and nothing is shown.

 Cannot create a dialog, the WebView context is not an Activity

I am suspecting that this behaviour has started after google has recently updated the WebView component. I am right now running on Android 5.0.1 and webview version is 40 (1832189-arm)

I will try rolling back the updates and check but I can't ask all the users to do it. Are there any other issues reported similar to this? Is there a solution?

Update I have uninstalled the updates to the WebView component and checked. Alerts are being shown fine. If this is an issue, where can I report it?

dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); dialog.show(); — Rahul
– Rahul, Commented Apr 16, 2015 at 11:48

Shashank Pujari · Accepted Answer · 2018-11-16 07:24:07Z

5

To get JavaScript Alert to work on Android WebView add below line of code:

mWebView.setWebChromeClient(new WebChromeClient());

After following Line of code:

webSettings.setJavaScriptEnabled(true);

Finally it Should look like:

webSettings.setJavaScriptEnabled(true);
mWebView.setWebChromeClient(new WebChromeClient());

answered Nov 16, 2018 at 7:24

Shashank Pujari

3193 silver badges7 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

ZipGenius Over a year ago

This answer should be marked as accepted, not Pavan's one.

Community · Accepted Answer · 2017-05-23 10:10:07Z

1

Here is the answer from JavaScript alert not working in Android WebView Check this link , and last comment , You have to use WebChromeClient for your purpose.

http://code.google.com/p/android/issues/detail?id=752

edited May 23, 2017 at 10:10

CommunityBot

11 silver badge

answered Apr 16, 2015 at 11:52

Lumi Lu

3,3011 gold badge14 silver badges21 bronze badges

1 Comment

Pavan Andhukuri Over a year ago

I have added the WebChromeClient. That is how the alerts were popping up in the earlier versions of WebView. But it is not working now with the upgraded WebView. Thanks.

Pavan Andhukuri · Accepted Answer · 2015-04-20 11:44:07Z

1

This seems to be a bug introduced into build 40 of WebView. It is fixed in version 42 as per the issue I've logged.

https://code.google.com/p/chromium/issues/detail?id=478204

answered Apr 20, 2015 at 11:44

Pavan Andhukuri

1,6273 gold badges28 silver badges49 bronze badges

Collectives™ on Stack Overflow

Webview not showing JavaScript alerts

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related