Android: Request focus on view (WebView) added via WindowManager

Question

I am showing a webView as an alertDialog from a service when my app is not running on foreground, therefore, My webView is attached to the screen via WindowManager.addView() method.

The webView has an input field which I want to be accessible by the user. Unfortunately, when the user clicks on the input field, it is not showing the keyboard for users to allow input.

My webView is inside a cardView who's params are as follows:

public WindowManager.LayoutParams getParamsForOpenWebView() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
        WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.TYPE_PHONE,
                 WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM
                        | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                        | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                        | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                PixelFormat.TRANSLUCENT);

        params.gravity = Gravity.START | Gravity.TOP;
        params.x = left;
        params.y = top;

        return params;
    } else {
        WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
                 WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM
                        | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                        | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                        | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                PixelFormat.TRANSLUCENT);


        params.gravity = Gravity.START | Gravity.TOP;
        params.x = left;
        params.y = 200;

        return params;
    }
}

If I connect the phone to my laptop and use the laptop keyboard to add inputs to the input field, it works fine but it's just that the keyboard on the phone does not pop-up.

Also, the input is inside the webView therefore I cannot use View.requestFocus() to get focus unlike in case of an EditText.

I would really appreciate any help regarding how to request focus to the webView to allow inputs.

Answer 1

Found an answer to the question myself after a while.

I tried a lot of combinations of different flags but none worked, unless I tried

WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                    | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                    | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS

These flags gave the results I wanted and hope it helps someone who goes through the same.