Calling a javascript function does not accept a variable parameter

Question

The following code is designed within a Fragment to call a javascript file (MyMap) and call a function (updateJSONandMap). The function itself sends a JSON to a server and takes three parameter. It works while the first parameter is hardcoded ("Incident") but will not work when I create a variable.

            webview.getSettings().setJavaScriptEnabled(true);
            webview.getSettings().setDomStorageEnabled(true);
            webview.loadUrl("file:///android_asset/MyMap.html");
            webview.setWebViewClient(new WebViewClient() {
                public void onPageFinished(WebView view, String url) {
                    webview.loadUrl("javascript:updateJSONandMap('Incident'," + latitude + "," + longitude + ")");
                }
            });

The block of text of the JSON is a string

            Event: {
                Action: 'PUT',
                Value: {"S": UserEvent}
            },

The obvious create a variable

final String incident = "incident2";

and then

webview.loadUrl("javascript:updateJSONandMap(" + incident + "," + latitude + "," + longitude + ")");

does not create an error, but does not send the JSON to the server

obviously incident2 is a variable, 'incident2' is a string

Selvin
– Selvin

2017-01-27 01:12:54 +00:00
Commented Jan 27, 2017 at 1:12 — Selvin
– Selvin, Commented Jan 27, 2017 at 1:12

JD Hernandez · Accepted Answer · 2017-01-27 02:35:02Z

1

Edit: I think there may be an error in your string, the first incident is surrounded by single quotations. Will this string work?

"javascript:updateJSONandMap('" + incident + "'," + latitude + "," + longitude + ")";

What if you do it this way around?

final String incident = "incident2";
String loadUrlParam = `javascript:updateJSONandMap('${incident}', ${latitude}, ${longitude})`;

webview.loadUrl(loadUrlParam);

edited Jan 27, 2017 at 2:35

JD Hernandez

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answered Jan 27, 2017 at 1:11

ChickenFeet

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1 Comment

Iorek Over a year ago

I just figured this out as I came to type back the answer! Thank you - webview.loadUrl("javascript:updateJSONandMap('" + incident + "'," + latitude + "," + longitude + ")");

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