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public class NavigationUtils {

    private static int mNavigationbarColor = Color.BLACK;

    // 显示状态栏
    public static void showStatusbar(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }
        window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

    // 隐藏状态栏
    public static void hideStatusbar(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }
        window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

    // 设置状态栏的背景色
    public static void setStatusbarBgColor(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.setStatusBarColor(Color.parseColor("#3F000000"));
    }

    // 导航栏变成透明的
    public static void hideNavigationbar(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }
        if (isDeviceVersionBelowM()) {
            window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        } else {
            mNavigationbarColor = window.getNavigationBarColor();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setNavigationBarColor(Color.TRANSPARENT);
        }
    }

    // 取消导航栏透明
    public static void showNavigationbar(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }
        if (isDeviceVersionBelowM()) {
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        } else {
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setNavigationBarColor(mNavigationbarColor);
        }
    }

    public static void hideNaviAndStatusBar(Window window) {
        hideNavigationbar(window);
        hideStatusbar(window);
    }

    public static void showNaviAndStatusBar(Window window) {
        showNavigationbar(window);
        showStatusbar(window);
    }

    private static boolean isDeviceVersionBelowLollipop() {
        return Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP;
    }

    private static boolean isDeviceVersionBelowM() {
        return Build.VERSION.SDK_INT < Build.VERSION_CODES.M;
    }

    // 设置view可以放到navigation的下面
    public static void translucentNavigationLayout(Window window) {
        if (window == null) {
            return;
        }
        if (isDeviceVersionBelowLollipop()) {
            return;
        }

        View decorView = window.getDecorView();
        int uiFlag = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
        decorView.setSystemUiVisibility(uiFlag);
    }

    /**
     * 使用沉浸式模式,导航栏和状态栏都隐藏
     */
    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static boolean useImmersiveMode(Window window) {
        if (window == null) {
            return false;
        }

        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
            return false;
        }

        // 透明状态栏
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        // 透明导航栏
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        window.getDecorView()
            .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
                | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

        return true;

    }

}