第一次打开新活动时出现延迟

Question

我正在开发一个Xamarin Android项目。我在Splash（第一个）屏幕上有一些动画。结束所有动画后，我正在开始一项活动。所以问题是第一次导航下一个Activity需要2-3秒。之后，除非我清除最近的应用程序列表，否则只需一秒钟即可在该Activity上导航。再次清理后需要2-3秒。

请在此处说明错误以及如何修复。

启动活动

[Activity(Theme = "@style/MyTheme.Splash", MainLauncher = true,NoHistory = true, ScreenOrientation = ScreenOrientation.Portrait)]
public class SplashScreenActivity : Activity
{
    private ImageView CircleImage;
    private ImageView SquakrLogo;

    private TextView text;
    private RelativeLayout logoRelativeLayout;

    Animation CircleImageAnimation;
    Animation SquakrLogoAnimation;
    Animation LargeDotAnimation;
    Animation PluseAnimation;

    Intent intentObject;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.SplashScreen);
        logoRelativeLayout = FindViewById<RelativeLayout>(Resource.Id.logo_layout);
        CircleImage = FindViewById<ImageView>(Resource.Id.circle_image_view);
        SquakrLogo = FindViewById<ImageView>(Resource.Id.logo_image_view);
        text = FindViewById<TextView>(Resource.Id.text);

        CircleImageAnimation = AnimationUtils.LoadAnimation(this, Resource.Animation.SplashTVAnimation);
        SquakrLogoAnimation = AnimationUtils.LoadAnimation(this, Resource.Animation.SplashLogoAnimation);
        LargeDotAnimation = AnimationUtils.LoadAnimation(this, Resource.Animation.SplashLastAnimation);
        PluseAnimation = AnimationUtils.LoadAnimation(this, Resource.Animation.SplashPulseAnimation);

        intentObject = new Intent(this, typeof(MainActivity));

    }

    public override void OnWindowFocusChanged(bool hasFocus)
    {
        base.OnWindowFocusChanged(hasFocus);
        if(hasFocus)
        {
            CircleImage.StartAnimation(CircleImageAnimation);
            CircleImageAnimation.AnimationEnd += CircleImageAnimation_AnimationEnd; 
        }
    }


    private void CircleImageAnimation_AnimationEnd(object sender, Animation.AnimationEndEventArgs e)
    {
        SquakrLogo.StartAnimation(SquakrLogoAnimation);
        CircleImage.Visibility = ViewStates.Invisible;
        logoRelativeLayout.Visibility = ViewStates.Visible;
        SquakrLogoAnimation.AnimationStart += SquakrPluseAnimation_AnimationStart;
        SquakrLogoAnimation.AnimationEnd += SquakrPluseAnimation_AnimationEnd;
    }

    private void SquakrPluseAnimation_AnimationStart(object sender, Animation.AnimationStartEventArgs e)
    {
        global::Android.Widget.RelativeLayout.LayoutParams param = new RelativeLayout.LayoutParams(50, 50);
        param.AddRule(LayoutRules.CenterInParent);
        CircleImage.LayoutParameters = param;
        CircleImage.Visibility = ViewStates.Visible;
    }

    private void SquakrPluseAnimation_AnimationEnd(object sender, Animation.AnimationEndEventArgs e)
    {
        CircleImage.StartAnimation(PluseAnimation);
        PluseAnimation.AnimationEnd += SquakrLogoAnimation_AnimationEnd;
    }


    private void SquakrLogoAnimation_AnimationEnd(object sender, Animation.AnimationEndEventArgs e)
    {
        RelativeLayout.LayoutParams param = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MatchParent, RelativeLayout.LayoutParams.MatchParent);
        param.AddRule(LayoutRules.CenterInParent);
        CircleImage.LayoutParameters = param;
        CircleImage.ScaleX = 2.0f;
        CircleImage.ScaleY = 2.0f;
        CircleImage.StartAnimation(LargeDotAnimation);
        LargeDotAnimation.AnimationStart += delegate
          {
            logoRelativeLayout.Visibility = ViewStates.Invisible;
          };
        LargeDotAnimation.AnimationEnd += Last_AnimationEnd;
    }

    private void Last_AnimationEnd(object sender, Animation.AnimationEndEventArgs e)
    {
        StartActivity(intentObject);
        Finish();
    }
}

主要活动

 #region Methods
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        initTodaysLineUp();
        GetSavedToken();
        if (!string.IsNullOrEmpty(accessToken) && !string.IsNullOrEmpty(refreshToken))
        {
            GetUserPreferences();
        }

        //PackageInfo info = this.PackageManager.GetPackageInfo("co.Squawkr", PackageInfoFlags.Signatures);

        //foreach (Android.Content.PM.Signature signature in info.Signatures)
        //{
        //    MessageDigest md = MessageDigest.GetInstance("SHA");
        //    md.Update(signature.ToByteArray());

        //    string keyhash = Convert.ToBase64String(md.Digest());
        //}
        if(SquawkrLoginManager.getInstance().isLoggedIn()){
            UserInfo userInfo = SquawkrLoginManager.getInstance().GetLastLoggedInUser();
            UpdatePushBadgeCount(userInfo);
            if (!string.IsNullOrEmpty(SquawkrLoginManager.getInstance().getDeviceId()) && !SquawkrLoginManager.getInstance().sendDeviceIdToServer())
            {
                SquawkrLoginManager.getInstance().SendNotificationRegistrationToServer(this);
            }
        }
    }