有没有办法检查状态栏的可见性？

Question

我有一项服务，当某些顶级活动处于（或不）处于全屏模式时，应该定期检查状态栏的可见性。 是否可以？

Answer 1

最后我发现了如何检查状态栏是否可见。它是某种黑客，但它对我有用。我在我的服务中创建了该方法：

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;
                }
            }
        });

    }

其中 widthS 和 heightS 我们的全局屏幕尺寸；
在这里，我只是将不可见的辅助窗口高度与屏幕高度进行比较，并决定状态栏是否可见。并且不要忘记在服务的 onDestroy 中删除 helperWnd 。

Answer 2

你好，如果你尝试这个提供 android 良好实践的代码，

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.
        }
    }
});

我会留下文档的链接： https://developer.android.com/training/system-ui/visibility#java

Answer 3

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

Answer 4

并不真地。如果您的 Activity 位于前台，则您的 Activity 可以告诉服务它是否使用隐藏状态栏的主题。不过，您无法独立于服务来确定这一点，更不用说对于第三方活动而不是您自己的活动了。