显示空白的沉浸式模式

Question

我正在尝试实现全屏模式，但对于 Android 4.4 及更高版本，它会在此处显示一个空白区域：

之前沉浸式模式（全屏）

和之后 toggleFullScreen(false);

如您所见，它不会删除它。这是我用来切换它的代码：

public void toggleFullscreen(boolean fs) {
        if (Build.VERSION.SDK_INT >= 11) {
            // The UI options currently enabled are represented by a bitfield.
            // getSystemUiVisibility() gives us that bitfield.
            int uiOptions = this.getWindow().getDecorView().getSystemUiVisibility();
            int newUiOptions = uiOptions;
            boolean isImmersiveModeEnabled =
                    ((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
            if (isImmersiveModeEnabled) {
                Log.i(getPackageName(), "Turning immersive mode mode off. ");
            } else {
                Log.i(getPackageName(), "Turning immersive mode mode on.");
            }

            // Navigation bar hiding:  Backwards compatible to ICS.
            if (Build.VERSION.SDK_INT >= 14) {
                newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
            }

            // Status bar hiding: Backwards compatible to Jellybean
            if (Build.VERSION.SDK_INT >= 16) {
                newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
            }

            // Immersive mode: Backward compatible to KitKat.
            // Note that this flag doesn't do anything by itself, it only augments the behavior
            // of HIDE_NAVIGATION and FLAG_FULLSCREEN.  For the purposes of this sample
            // all three flags are being toggled together.
            // Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
            // Sticky immersive mode differs in that it makes the navigation and status bars
            // semi-transparent, and the UI flag does not get cleared when the user interacts with
            // the screen.
            if (Build.VERSION.SDK_INT >= 18) {
                newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
            }
            getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
        } else {
            // for android pre 11
            WindowManager.LayoutParams attrs = getWindow().getAttributes();
            if (fs) {
                attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
            } else {
                attrs.flags &= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
            }
            this.getWindow().setAttributes(attrs);
        }

        try {
            // hide actionbar
            if
                    (this instanceof AppCompatActivity) {
                if (fs) getSupportActionBar().hide();
                else getSupportActionBar().show();
            } else if
                    (Build.VERSION.SDK_INT >= 11) {
                if (fs) getActionBar().hide();
                else getActionBar().show();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 1

请检查您的布局中没有android:fitsSystemWindows="true"。

至少它解决了我的问题——我在 FrameLayout 上有了 fitSystemWindows。

Answer 2

我是新来的，所以无法发表评论，但想补充一些让我对上述解决方案感到非常沮丧的东西。我一直在检查我的活动及其片段是否有android:fitsSystemWindows="true"，它肯定不存在，但我一直在底部有一个缺口！我快疯了！解决这个简单的事情不会这么难！

原来它也出现在我添加的导航抽屉中......所以一定要检查你所有的 XML！

Answer 3

试试这个：

override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    var viewParent = view
    while (viewParent is View) {
        viewParent.fitsSystemWindows = false
        viewParent.setOnApplyWindowInsetsListener { _, insets -> insets }
        viewParent = viewParent.parent as View?
    }
}

这是做什么的？ DialogFragment#onActivityCreated() 调用 Dialog#setContentView()，它将 Dialog 的视图包装在私有的“wrapInBottomSheet”中。为了设置这些包装视图的正确标志，我们希望在它们被包装后设置这些标志，例如在 super.onActivityCreated() 之后

还可以观看此演讲，了解有关 fitSystemWindows 和窗口插图的信息。

Answer 4

只需将布局文件中的 android:fitsSystemWindows="true" 更改为 android:fitsSystemWindows="false"。

Answer 5

您需要将此标志添加到您的视图 View.SYSTEM_UI_FLAG_LAYOUT_STABLE。像这样试试吧

// This snippet hides the system bars.
private void hideSystemUI() {
// Set the IMMERSIVE flag.
// Set the content to appear under the system bars so that the content
// doesn't resize when the system bars hide and show.
mDecorView.setSystemUiVisibility(
        View.SYSTEM_UI_FLAG_LAYOUT_STABLE
        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
        | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
        | View.SYSTEM_UI_FLAG_IMMERSIVE);
}

// This snippet shows the system bars. It does this by removing all the  flags
// except for the ones that make the content appear under the system bars.
private void showSystemUI() {
mDecorView.setSystemUiVisibility(
        View.SYSTEM_UI_FLAG_LAYOUT_STABLE
        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}