Is there a way to check the visibility of the status bar?

问题

I have a service that should check periodically visibility of status bar, when some top activity is (or not) in fullscreen mode. Is it possible?

回答1:

Finally I have discovered how to check if statusbar is visible or not. Its some kind of hack, but it works for me. I created that method in my Service:

private void createHelperWnd() {
        WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
        final WindowManager.LayoutParams p = new WindowManager.LayoutParams();
        p.type = WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
        p.gravity = Gravity.RIGHT | Gravity.TOP;
        p.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
        p.width = 1;
        p.height = LayoutParams.MATCH_PARENT;
        p.format = PixelFormat.TRANSPARENT;
        helperWnd = new View(this); //View helperWnd;

        wm.addView(helperWnd, p);
        final ViewTreeObserver vto = helperWnd.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

            @Override
            public void onGlobalLayout() {

                if (heightS == helperWnd.getHeight()) {
                    isFullScreen = true;
                } else {
                    isFullScreen = false;
                }
            }
        });

    }

where widthS and heightS our global screen size; Here I just compared invisible helper window height to screen height and make decision if status bar is visible. And do not forget to remove helperWnd in onDestroy of your Service.

回答2:

public boolean isStatusBarVisible() {
    Rect rectangle = new Rect();
    Window window = getActivity().getWindow();
    window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
    int statusBarHeight = rectangle.top;
    return statusBarHeight != 0;
}

回答3:

Not really. If it is your activity in the foreground, your activity could tell the service if it is using a theme that hides the status bar. You have no way of determining this independently from the service though, let alone for third-party activities rather than your own.

回答4:

hello and if you try this code that provides android as good practice

View decorView = getWindow().getDecorView();
decorView.setOnSystemUiVisibilityChangeListener
        (new View.OnSystemUiVisibilityChangeListener() {
    @Override
    public void onSystemUiVisibilityChange(int visibility) {
        // Note that system bars will only be "visible" if none of the
        // LOW_PROFILE, HIDE_NAVIGATION, or FULLSCREEN flags are set.
        if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
            // TODO: The system bars are visible. Make any desired
            // adjustments to your UI, such as showing the action bar or
            // other navigational controls.
        } else {
            // TODO: The system bars are NOT visible. Make any desired
            // adjustments to your UI, such as hiding the action bar or
            // other navigational controls.
        }
    }
});

I leave the link of the documentation: https://developer.android.com/training/system-ui/visibility#java

来源：https://stackoverflow.com/questions/8200838/is-there-a-way-to-check-the-visibility-of-the-status-bar

标签

android

android-layout

statusbar