Prevent back button from closing a dialog box

Question

I am trying to prevent an AlertDialog box from closing when pressing the back button in Android. I have followed both of the popular methods in this thread, and with System.out.

Answer 1

In JQuery Mobile a popup adds a hash to the url, the following code allows the back to dismiss the popup when open and return to the app when closed. You could use the same logic for a custom ui framework.

@Override
public void onBackPressed() {

    // check if modal is open #&ui-state=dialog

    if (webView.getVisibility() == View.VISIBLE && webView.getUrl().contains("#&ui-state=dialog")) {
        // don't pass back button action
        if (webView.canGoBack()) {
            webView.goBack();
        }
    } else {
        // pass back button action
        super.onBackPressed();
    }
}