Android Activity to WebView and WebView to Activity Parameter Passing

Question

I have an application in which an activity communicates with our server and gets the outstanding amount details. I want users to pay the outstanding amount using a payment g

Answer 1

You can make use of Intent.putExtra() while navigating using Intents, Shared Preferences and also Bundle. Please read Android documentation for Shared Preferences, Intents, Bundle

Answer 2

You could achieve what you want using a javascript WebAppInterface as demonstrated here.

The main concept is that, you create a javascript interface inside the Activity holding your WebView.

private class WebPayInterface {
    int amount;
    boolean success;

    @JavascriptInterface
    public void PaymentFinished(int amount, boolean success) {
        this.amount = amount;
        this.success = success;

        // do whatever you want in the parent activity.
    }
}

Add the interface to your webView

webView.addJavascriptInterface(new WebPayInterface(), "WebPayInterface");

Finally in your html code using javascript you can call

WebPayInterface.PaymentFinished(100, true);