How to call a javascript function from android fragment?

Question

I have a webview in a fragment and have my own Bridgecallback services.

I have a javascript file TriggerEventsService.js

define(function(require){

    var Service = require('BridgeService');
    var TriggerEventsService = new Service({
        name: "TriggerEventsService",
        timeout : 3000
    });

    //Public API
    TriggerEventsService.postHibernate = function(){
        this.execute("postHibernate", {"event" : "App becoming inactive"}, function(){}, function(){});
    };

In my HTML file index.html

  function postEventHibernate(){
            require(['TriggerEventsService'], function(ui){
                ui.postHibernate();
            });
        }

Can I call this function directly from native android methods ?

In iOS I have done this:

    NSString *jsString = [NSString stringWithFormat:@"require(['TriggerEventsService'],
 function(ui){ui.postHibernate();});"];
             [self.webView evaluateJavaScript:jsString completionHandler:nil];

and It works fine !I know a way to do it in iOS , figuring anyone can help me out if android has any direct method ?

I have seen other Answers but was not sure how to call the my TriggerEventsService.js - webview.loadUrl("WHAT EXACTLY SHOULD I CALL HERE ?");

Possible duplicate of How to call a JavaScript function from java code android native — Zoe - Save the data dump
– Zoe - Save the data dump, Commented Apr 17, 2017 at 16:04
@LunarWatcher I have seen other answers but was not able to resolve my issue. Can you help me out in this method webview.loadUrl(" WHAT Should I call here exactly"); — DroidDev
– DroidDev, Commented Apr 17, 2017 at 16:07

CommonsWare · Accepted Answer · 2017-04-18 17:09:50Z

1

I have seen other Answers but was not sure how to call the my TriggerEventsService.js - webview.loadUrl("WHAT EXACTLY SHOULD I CALL HERE ?");

Assuming that postEventHibernate() is a global JavaScript function, this would be:

webview.loadUrl("javascript:postEventHibernate();");

FWIW, this is covered in my book, though most of this specific material is in the preview edition of my advanced WebView chapter.

answered Apr 18, 2017 at 17:09

CommonsWare

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1 Comment

DroidDev Over a year ago

Ahhh I was trying webview.loadUrl("javascript:postEventHibernate()"); just a semi column away from 8 hours!! Thanks A lot ! Resolved by:-

webView.setWebViewClient(new WebViewClient(){             public void onPageFinished(WebView view, String url){                 webView.loadUrl("javascript:postEventHibernate();");             }         });

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