使用布局 Xamarin 创建 SplashScreen

问题描述

我正在尝试在 Xamarin Studio 中创建启动画面.

Im trying to create a splashscreen in Xamarin Studio.

我做了以下事情:

• 使用初始图像创建我的布局.
• 创建了一个主题 (styles.xml) 以便隐藏标题栏.
• 创建了一个设置 contentview 然后让线程休眠的活动.

由于某种原因它不起作用，我希望你能在这里帮助我:

For some reason it did not work and I hoped you could help me out here:

SplashScreen.cs(SplashScreen 活动)

SplashScreen.cs (SplashScreen activity)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

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

namespace EvoApp
{
    [Activity (MainLauncher = true, NoHistory = true, Theme = "@style/Theme.Splash")]
    public class SplashScreen : Activity
    {
        protected override void OnCreate (Bundle bundle)
        {
            base.OnCreate (bundle);

            this.SetContentView (Resource.Layout.Splash);

            ImageView image = FindViewById<ImageView> (Resource.Id.evolticLogo);
            image.SetImageResource (Resource.Drawable.Splash);

            Thread.Sleep (2000);
            StartActivity (typeof(MainActivity));
        }
    }
}

styles.xml

<?xml version="1.0" encoding="UTF-8" ?>
<resources>
  <style name="Theme.Splash" parent="android:Theme">
    <item name="android:windowNoTitle">true</item>
  </style>
</resources>

所以结果是一个空白的 SplashActivity....

So the result of this is a blank SplashActivity....

提前致谢！

推荐答案

屏幕是空白的，因为通过调用 Thread.Sleep 然后在 OnCreateView 中调用 StartActivitycode>，您首先暂停 UI 线程(这不会导致任何显示)，然后使用 StartActivity 立即退出活动.

The screen is blank because by calling Thread.Sleep then StartActivity in OnCreateView, you are first pausing the UI thread (which will cause nothing to display) and are then exiting the activity immediately by using StartActivity.

要解决此问题，请将 Thread.Sleep() 和 StartActivity() 移至后台线程:

To fix this, shift Thread.Sleep() and StartActivity() into a background thread:

protected override void OnCreate (Bundle bundle)
{
    base.OnCreate (bundle);

    this.SetContentView (Resource.Layout.Splash);

    ImageView image = FindViewById<ImageView> (Resource.Id.evolticLogo);
    image.SetImageResource (Resource.Drawable.Splash);

    System.Threading.Tasks.Task.Run( () => {
        Thread.Sleep (2000);
        StartActivity (typeof(MainActivity));
    });
}

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