Question

我正在尝试连接应用内结算但OnConnected事件未被点击。我的Android Manifest代码是

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="alphaTestApp.alphaTestApp" android:versionCode="1" android:versionName="1.0">
    <uses-sdk android:minSdkVersion="15" android:targetSdkVersion="21" />
    <uses-permission android:name="com.android.vending.BILLING" />
    <uses-permission android:name="android.permission.INTERNET" />
    <application android:label="alphaTestApp" android:icon="@drawable/Icon"></application>
</manifest>

主要活动文件代码为。

[Activity(Label = "alphaTestApp", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        private InAppBillingServiceConnection _serviceConnection;
        string publicKey = "REDACTED";

    private IList<Product> _products;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);            
        SetContentView(Resource.Layout.Main);

        _serviceConnection = new InAppBillingServiceConnection(this, publicKey);
        if (_serviceConnection == null)
        {
            Toast t = Toast.MakeText(this, "Error while connecting", ToastLength.Long);
            t.Show();
        }

        _serviceConnection.Connect();

        Toast t1 = Toast.MakeText(this, "Connected app", ToastLength.Long);
        t1.Show();

        _serviceConnection.OnConnected += () =>
        {
            Toast t2 = Toast.MakeText(this, "Retrieving Items", ToastLength.Long);
            t2.Show();
            _products = _serviceConnection.BillingHandler.QueryInventoryAsync(new List<string>   {
                "goldcoin100"
            }, ItemType.Product) as IList<Product>;

            if (_products == null)
                return;

            _serviceConnection.BillingHandler.BuyProduct(_products[0]);
        };

        Button button = FindViewById<Button>(Resource.Id.MyButton);
        button.Click += delegate
        {
            Toast t3 = Toast.MakeText(this, "Retrieving Items", ToastLength.Long);
            t3.Show();
            _products = _serviceConnection.BillingHandler.QueryInventoryAsync(new List<string>   {
                "goldcoin100"
            }, ItemType.Product) as IList<Product>;

            if (_products == null)
                return;

            _serviceConnection.BillingHandler.BuyProduct(_products[0]);
        };




    }



}

Answer 1

这可能不是原因，但最好在调用OnConnected之前设置Connect处理程序，以防它连接的时间少于Toast代码运行所需的时间。

此外，您应该设置OnConnected处理程序async，然后等待QueryInventoryAsync的调用（在Lambda中，async关键字位于括号之前，例如{ {1}} ...）。事实上，OnConnected += async () =>将返回QueryInventoryAsync，因此尝试使用Task<IList<Product>>进行转换将失败，_products将始终为null。

如果您在模拟器上运行，请确保您已安装Google Play服务并保持最新状态。这里有一篇关于为Xamarin Android播放器执行此操作的文章：Installing Google Play Services in XAP。虽然请注意IList<Product>不能在使用真实产品的模拟器上运行，但您需要使用测试产品ID（例如BuyProduct），并注意一旦您购买了此产品ID，您将需要需要先再打ReservedTestProductIDs.Purchased才能再次购买。）

另外，请勿在开放论坛上发布您的API密钥。

应用内结算连接问题

1 个答案: