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我正在开发一个Xamarin（PCL）跨平台应用程序，我目前正在测试Android物理设备和仿真器。该应用在高端手机上运行得非常完美，但三星S4和其他低端手机的“意外崩溃”。它只会在我执行多个活动和任务后崩溃。Xamarin Forms - 线程效率
我假设这与这些手机的任务线程容量有关。如果我在这方面是正确的，我应该如何让我的应用程序在所有手机上都能顺畅无误地运行？
编辑 - 错误说“应用程序意外关闭”。此错误不会显示在特定的行上，因为它与代码无关。当执行许多活动时，它只会在某些“老”手机上打破。活动示例包括：将数据添加到数据库，更新/删除它们，从一个活动移动到另一个活动，从用户输入的数据中显示日历和饼图。
的Xaml：
<ScrollView HorizontalOptions="Fill" Orientation="Horizontal">
<StackLayout Orientation="Vertical" BackgroundColor="GhostWhite" >
<StackLayout Orientation="Horizontal" BackgroundColor="GhostWhite" >
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="dairy" Image="{Binding Dairy_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="alcohol" Image="{Binding Alcohol_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="eggs" Image="{Binding Egg_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="fastfood" Image="{Binding Fastfood_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="fish" Image="{Binding Fish_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="fruit" Image="{Binding Fruit_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="grain" Image="{Binding Grain_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="legume" Image="{Binding Legume_Image}"/>
</StackLayout>
<StackLayout Orientation="Horizontal" BackgroundColor="GhostWhite" >
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="meat" Image="{Binding Meat_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="munchies" Image="{Binding Munchies_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="nuts" Image="{Binding Nut_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="potato" Image="{Binding Potato_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="soda" Image="{Binding Soda_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="sweets" Image="{Binding Sweet_Image}"/>
<Button HeightRequest="50" BackgroundColor="GhostWhite" WidthRequest="50" Command="{Binding Button_Clicked_Food}" CommandParameter="vegetables" Image="{Binding Vegetable_Image}"/>
</StackLayout>
</StackLayout>
.CS：
public UserMealINC_vm(User_Profiles up, DateTime day)
{
try
{
Day = day;
User_pro = up;
Bool_Food_Type = false;
Food_Name = "";
Type = "";
Food_Weight = "0";
Selected_Food = new List<string>();
//All meal item are first initialized with the non-coloured images
Dairy_Image = "drawable/dairy.png";
Alcohol_Image = "drawable/alcohol.png";
Egg_Image = "drawable/eggs.png";
Fastfood_Image = "drawable/fastfood.png";
Fish_Image = "drawable/fish.png";
Fruit_Image = "drawable/fruit.png";
Grain_Image = "drawable/grain.png";
Legume_Image = "drawable/legume.png";
Meat_Image = "drawable/meat.png";
Munchies_Image = "drawable/munchies.png";
Nut_Image = "drawable/nuts.png";
Potato_Image = "drawable/potato.png";
Soda_Image = "drawable/soda.png";
Sweet_Image = "drawable/sweets.png";
Vegetable_Image = "drawable/vegetables.png";
this.Button_Clicked_Food = new Command<string>((key) =>
{
//Change the item selected from color to non-color, or vice-versa
if (Selected_Food.Contains(key))
{
if (key == "dairy")
{
Dairy_Image = "drawable/dairy.png";
}
else if (key == "alcohol")
{
Alcohol_Image = "drawable/alcohol.png";
}
else if (key == "eggs")
{
Egg_Image = "drawable/eggs.png";
}
else if (key == "fastfood")
{
Fastfood_Image = "drawable/fastfood.png";
}
else if (key == "fish")
{
Fish_Image = "drawable/fish.png";
}
else if (key == "fruit")
{
Fruit_Image = "drawable/fruit.png";
}
else if (key == "grain")
{
Grain_Image = "drawable/grain.png";
}
else if (key == "legume")
{
Legume_Image = "drawable/legume.png";
}
else if (key == "meat")
{
Meat_Image = "drawable/meat.png";
}
else if (key == "munchies")
{
Munchies_Image = "drawable/munchies.png";
}
else if (key == "nuts")
{
Nut_Image = "drawable/nuts.png";
}
else if (key == "potato")
{
Potato_Image = "drawable/potato.png";
}
else if (key == "soda")
{
Soda_Image = "drawable/soda.png";
}
else if (key == "sweets")
{
Sweet_Image = "drawable/sweets.png";
}
else if (key == "vegetables")
{
Vegetable_Image = "drawable/vegetables.png";
}
else
{
//Key out of bounds???
}
Selected_Food.Remove(key);
}
else
{
if (key == "dairy")
{
Dairy_Image = "drawable/dairy_color.png";
}
else if (key == "alcohol")
{
Alcohol_Image = "drawable/alcohol_color.png";
}
else if (key == "eggs")
{
Egg_Image = "drawable/eggs_color.png";
}
else if (key == "fastfood")
{
Fastfood_Image = "drawable/fastfood_color.png";
}
else if (key == "fish")
{
Fish_Image = "drawable/fish_color.png";
}
else if (key == "fruit")
{
Fruit_Image = "drawable/fruit_color.png";
}
else if (key == "grain")
{
Grain_Image = "drawable/grain_color.png";
}
else if (key == "legume")
{
Legume_Image = "drawable/legume_color.png";
}
else if (key == "meat")
{
Meat_Image = "drawable/meat_color.png";
}
else if (key == "munchies")
{
Munchies_Image = "drawable/munchies_color.png";
}
else if (key == "nuts")
{
Nut_Image = "drawable/nuts_color.png";
}
else if (key == "potato")
{
Potato_Image = "drawable/potato_color.png";
}
else if (key == "soda")
{
Soda_Image = "drawable/soda_color.png";
}
else if (key == "sweets")
{
Sweet_Image = "drawable/sweets_color.png";
}
else if (key == "vegetables")
{
Vegetable_Image = "drawable/vegetables_color.png";
}
else
{
//Key out of bounds???
}
Selected_Food.Add(key);
}
});
}
catch (Exception ex)
{
App.Current.MainPage.DisplayAlert("UserMealINC_vm 1!", ex.Message, "OK");
}
}
这取决于您遇到的是什么样的崩溃。谨慎地详细阐述一下？ – Cheesebaron
什么是错误？代码是什么样的？它会发生什么事？ – hvaughan3
@ hvaughan3我编辑了我的问题。 – TigerLionCheetah