在沈浸模式下隱藏系統資訊列

部分內容在全螢幕模式下可帶來最佳體驗,而狀態列或導覽列不會顯示任何指標。例如影片、遊戲、圖片圖片庫、書籍和簡報投影片。這就是所謂的「沈浸模式」。本頁面說明如何透過全螢幕顯示更深入的內容,吸引使用者的目光。

圖 1.沉浸模式範例。

沉浸模式可協助使用者在遊戲期間意外退出,並提供沉浸式體驗,讓你盡情享受圖片、影片和書籍。不過,請留意使用者進入及離開應用程式查看通知的頻率、執行不預期的搜尋,或是執行其他操作的頻率。由於沉浸模式會導致使用者無法輕鬆存取系統導覽,因此請只在有助使用者體驗帶來的益處,光使用額外的螢幕空間時,才使用沉浸模式。

使用 WindowInsetsControllerCompat.hide() 隱藏系統列,而 WindowInsetsControllerCompat.show() 則可恢復顯示。

下列程式碼片段示範如何設定隱藏及顯示系統資訊列的按鈕。

Kotlin

override fun onCreate(savedInstanceState: Bundle?) {
    ...

    val windowInsetsController =
        WindowCompat.getInsetsController(window, window.decorView)
    // Configure the behavior of the hidden system bars.
    windowInsetsController.systemBarsBehavior =
        WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE

    // Add a listener to update the behavior of the toggle fullscreen button when
    // the system bars are hidden or revealed.
    window.decorView.setOnApplyWindowInsetsListener { view, windowInsets ->
        // You can hide the caption bar even when the other system bars are visible.
        // To account for this, explicitly check the visibility of navigationBars()
        // and statusBars() rather than checking the visibility of systemBars().
        if (windowInsets.isVisible(WindowInsetsCompat.Type.navigationBars())
            || windowInsets.isVisible(WindowInsetsCompat.Type.statusBars())) {
            binding.toggleFullscreenButton.setOnClickListener {
                // Hide both the status bar and the navigation bar.
                windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
            }
        } else {
            binding.toggleFullscreenButton.setOnClickListener {
                // Show both the status bar and the navigation bar.
                windowInsetsController.show(WindowInsetsCompat.Type.systemBars())
            }
        }
        view.onApplyWindowInsets(windowInsets)
    }
}

Java

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...

    WindowInsetsControllerCompat windowInsetsController =
            WindowCompat.getInsetsController(getWindow(), getWindow().getDecorView());
    // Configure the behavior of the hidden system bars.
    windowInsetsController.setSystemBarsBehavior(
            WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
    );

    // Add a listener to update the behavior of the toggle fullscreen button when
    // the system bars are hidden or revealed.
    getWindow().getDecorView().setOnApplyWindowInsetsListener((view, windowInsets) -> {
        // You can hide the caption bar even when the other system bars are visible.
        // To account for this, explicitly check the visibility of navigationBars()
        // and statusBars() rather than checking the visibility of systemBars().
        if (windowInsets.isVisible(WindowInsetsCompat.Type.navigationBars())
                || windowInsets.isVisible(WindowInsetsCompat.Type.statusBars())) {
            binding.toggleFullscreenButton.setOnClickListener(v -> {
                // Hide both the status bar and the navigation bar.
                windowInsetsController.hide(WindowInsetsCompat.Type.systemBars());
            });
        } else {
            binding.toggleFullscreenButton.setOnClickListener(v -> {
                // Show both the status bar and the navigation bar.
                windowInsetsController.show(WindowInsetsCompat.Type.systemBars());
            });
        }
        return view.onApplyWindowInsets(windowInsets);
    });
}

您可以視需要指定要隱藏的系統資訊列類型,以及決定使用者與這些列互動時的行為。

指定要隱藏的系統資訊列

如要指定要隱藏的系統資訊列類型,請將下列其中一項參數傳遞至 WindowInsetsControllerCompat.hide()

指定隱藏系統資訊列的行為

使用 WindowInsetsControllerCompat.setSystemBarsBehavior() 指定隱藏系統列在使用者與其互動時的行為。