How to determine if any system dialog is displayed?

Question

How to check if any system dialog (like the one below or USSD) is displayed in Android ?

Programmatic way or cmd root way? Any variants.

Answer 1

A system dialog is an activity. You can detect it by the top activity class name using ActivityManager.

final ActivityManager manager = (ActivityManager) context
    .getSystemService(Activity.ACTIVITY_SERVICE);

In devices with API Level less than 23 (M):

final List<ActivityManager.RunningTaskInfo> runningTasks = manager.getRunningTasks(1);
final ComponentName componentName = runningTasks.get(0).topActivity;
final String className = componentName.getClassName();

if (className.equals("YOUR_EXPECTED_ACTIVITY_CLASS_NAME")) {
    // do something
}

In newer devices:

final List<ActivityManager.AppTask> appTasks = manager.getAppTasks();
final ComponentName componentName = appTasks.get(0).getTaskInfo().topActivity;
final String className = componentName.getClassName();

if (className.equals("YOUR_EXPECTED_ACTIVITY_CLASS_NAME")) {
    // do something
}

Or in this case, you can check if the device is in airplane mode before starting the activity:

private boolean isAirplaneModeOn(final Context context) {
    final int airplaneMode = Settings.System.getInt(
        context.getContentResolver(),
        Settings.System.AIRPLANE_MODE_ON,
        0
    );

    return airplaneMode != 0;
}

...

if (!isAirplaneModeOn(this)) {
    // do something
}