Xamarin.Forms android实现沉浸式

在android项目里，这样设置

using System;

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

namespace Doubi.Droid
{
    [Activity(Label = "Doubi", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            var uiOpts = SystemUiFlags.LayoutStable | SystemUiFlags.LayoutFullscreen;
            //LayoutStable表示布局稳定，不随其他变动而变动
            //LayoutFullscreen表示把布局拓宽到全屏幕

            Window.DecorView.SystemUiVisibility = (StatusBarVisibility)uiOpts;

            //把标题栏设置为透明色
            Window.SetStatusBarColor(Android.Graphics.Color.Argb(0,0,0,0));

            base.OnCreate(bundle);

            Doubi.KLineView.Density = Resources.DisplayMetrics.Density;

            global::Xamarin.Forms.Forms.Init(this, bundle);
            LoadApplication(new App());
        }
    }
}

更多UIFlag的说明：

Flag	意义
SYSTEM_UI_FLAG_LOW_PROFILE	弱化状态栏和导航栏的图标
SYSTEM_UI_FLAG_HIDE_NAVIGATION	隐藏导航栏，用户点击屏幕会显示导航栏
SYSTEM_UI_FLAG_FULLSCREEN	隐藏状态栏
SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION	拓展布局到导航栏后面
SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN	拓展布局到状态栏后面
SYSTEM_UI_FLAG_LAYOUT_STABLE	稳定的布局，不会随系统栏的隐藏、显示而变化
SYSTEM_UI_FLAG_IMMERSIVE	沉浸模式，用户可以交互的界面
SYSTEM_UI_FLAG_IMMERSIVE_STICKY	沉浸模式，用户可以交互的界面。同时，用户上下拉系统栏时，会自动隐藏系统栏