how to get value from javascript in android?

Question

Android

Good afternoon. My application consists of a webview.
In order for the application to be at least somehow similar to the "android" one, I added a button to add to the mainactivity, when clicked, the javascript code of the site is called, which displays a pop-up window for entering information. At the same time, I do
add_button.hide () in mainactivity so that when the window pops up, the add button disappears.
Now I can't figure out how to make add_button reappear after submitting the form or closing the popup window. On the side of the site, I can write to the javascript variable on the event that the window has closed. How can I get this value in webview to do something like add_button.show() ?

Answer 1

There is such a class JavaScriptInterface
with its help, you can implement the logic
of calling java code from js executable in webview
implementation example https://stackoverflow.com/questions/10389572/call-...