关闭活动时，将产品保存在购物篮中

Question

当我从产品列表中添加产品时，我有篮子活动。

添加属性的代码

add.Click += delegate {
        var intent = new Intent (this, typeof(CartActivity));
        intent.PutExtra ("title", (string)(firstitem ["post_title"]));
        intent.PutExtra ("price", (string)(firstitem ["price"] + " грн"));
        intent.PutExtra ("weight", (string)(firstitem ["weight"] + "г"));
        StartActivity (intent);
    };

接收属性的代码

productname.Text = Intent.GetStringExtra("title");
    price.Text = Intent.GetStringExtra("price");
    weight.Text = Intent.GetStringExtra("weight");

我试过OnPause

namespace MurakamiKiev
{
[Activity(Label = "Murakami",  Icon = "@drawable/logo", Theme = "@android:style/Theme.Black.NoTitleBar", ScreenOrientation = ScreenOrientation.Portrait)]
public class CartActivity : Activity
{
    protected override void OnPause()
    {
        base.OnPause();

但是当我运行活动时，我有黑屏

Answer 1

您是否在OnCreate（）中调用了SetContentView（）？

像这样

namespace MurakamiKiev
{
    [Activity(Label = "Murakami",  Icon = "@drawable/logo", Theme = "@android:style/Theme.Black.NoTitleBar", ScreenOrientation = ScreenOrientation.Portrait)]
    public class CartActivity : Activity
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView(Resource.Layout.YourLayout);
        }
    }
}