Sometimes throws Uncaught Error: Error calling method on NPObject on Android

Question

I am having problems with the Webview in Android and it\'s JavascriptInterfaces.

I am passing a string to the JavascriptInterface. When debugging it, I receive the c

Answer 1

Operate iframe in Android 4.4 WebView may cause a similar exception(Uncaught ReferenceError: NPObject deleted), finally I find out the solution:

@Override
public void onPageFinished(final WebView view, String finishUrl) {
    super.onPageFinished(view, finishUrl);
    // android 4.4 may lost value of 'Android' when operating iframe
    view.addJavascriptInterface(Activity.this, "Android");
}