How to check if the current activity has a dialog in front?

Question

I am using a third-party library and sometimes it pops up a dialog. Before I finish the current activity, I want to check whether there is a dialog popped up in the current con

Answer 1

You can override activity method onWindowFocusChanged(boolean hasFocus) and track the state of your activity.

Normally, if some alert dialog is shown above your activity, the activity does not get onPause() and onResume() events. But it loses focus on alert dialog shown and gains it when it dismisses.

Answer 2

AFAIK - there is no public API for this.

Recommended way is to have a reference to the dialog, and check for isShowing() and call dismiss() if necessary, but since you're using a third party library, this may not be an options for you.

Your best bet is to check the documentation for the library you use. If that doesn't help, you're out of luck.

Hint: Activity switches to 'paused' state if a dialog pops up. You may be able to 'abuse' this behavior ;)

Answer 3

I faced a similar problem, and did not want to modify all locations where dialogs were being created and shown. My solution was to look at whether the view I was showing had window focus via the hasWindowFocus() method. This will not work in all situations, but worked in my particular case (this was for an internal recording app used under fairly restricted circumstances).

This solution was not thoroughly tested for robustness but I figured I would post in in case it helped somebody.

Answer 4

I am assuming, you are dealing with third party library and you don't have access to dialog object.

You can get the root view from the activity,

Then you can use tree traversal algorithm to see if you can reach any of the child view. You should not reach any of your child view if alert box is displayed.

When alert view is displayed ( check with Ui Automator ), the only element present in UI tree are from DialogBox / DialogActivity. You can use this trick to see if dialog is displayed on the screen. Though it sounds expensive, it could be optimized.

Answer 5

If you are using Kotlin just:

supportFragmentManager.fragments.any { it is DialogFragment }

Answer 6

You can check it running over the active fragments of that activity and checking if one of them is DialogFragment, meaning that there's a active dialog on the screen:

    public static boolean hasOpenedDialogs(FragmentActivity activity) {
        List<Fragment> fragments = activity.getSupportFragmentManager().getFragments();
        if (fragments != null) {
            for (Fragment fragment : fragments) {
                if (fragment instanceof DialogFragment) {
                    return true;
                }
            }
        }

        return false;
    }