call javascript method in .js file inside android studio assets

Question

I am using a library called matrix.org

there are some javascript files in this library that contains some methods

is it possible to call these method inside native java or kotlin code of android studio ?

Answer 1

First you have to enable JavaScript

webView.getSettings().setJavaScriptEnabled(true); 

To call JavaScript method you have to use evaluateJavascript(..) method

    webView.evaluateJavascript("javascript: " + "getValue(\"message\")", new ValueCallback<String>() {
        @Override
        public void onReceiveValue(String value) {
            Log.i(TAG, "onReceive");
            Log.i(TAG, "Received: " + value);
        }
    });

And your JavaScript method is like

function getValue(msg) {
    return 10;
}