Android 如何为应用内计费实施SkuDetailsResponseListener？

我想在我的Android应用程序中包含应用内计费。 阅读文档时，它会说：

“指定一个实现SkuDetailsResponseListener接口的侦听器。然后，您可以覆盖onSkuDetailsResponse（），该侦听器在查询完成时通知侦听器”

其中：

@Override
    public void onSkuDetailsResponse(BillingResult billingResult, List<SkuDetails> skuDetailsList) {

    }

@覆盖
公共无效onSkuDetailsResponse（BillingResult BillingResult，列表skuDetailsList）{
}

但是，这是一个问题，因为它不包括文档中指定的侦听器，即

billingClient.querySkuDetailsAsync(params.build(),
    new SkuDetailsResponseListener() {
        @Override
        public void onSkuDetailsResponse(BillingResult billingResult,
                List<SkuDetails> skuDetailsList) {
            // Process the result.
        }
    });

billingClient.querySkuDetailsAsync（params.build（），
新SkuDetailsResponseListener（）{
@凌驾
公共无效详细信息响应（BillingResult BillingResult，
列表（详细信息列表）{
//处理结果。
}
});

当包含BillingClient行和侦听器时，显然存在一个解析符号错误，因为它在任何方法之外，所以您如何解决这个问题

此外，是否将此块放在onCreate（）中

List skuList=newarraylist（）；
skuList.添加（“硬币5”）；
SkuDetailsParams.Builder params=SkuDetailsParams.newBuilder（）；
参数setskulist（skuList）.setType（SkuType.INAPP）；

欢迎来到stackoverflow

两种解决方案：

• 使用文档中指定的侦听器，不要在类声明中实现它

• 或者保留实现，改为

  billingClient.queryskudDetailsAsync（params.build（），new SkuDetailsResponseListener（）{..

---

只需使用：

billingClient.queryskuedetailsasync（params.build（），this）；

正如BillingAPI文档中所述，您还需要实现BillingClientStateListener以及PurchaseUpdateListener。 以下代码是针对SDK 28的Android版本的计费API 3.0中的一个工作示例。该代码在Singleton类中定义，因此可以通过BillingClient的一个实例从多个活动中使用

     public class ApplicationBillingClient
       {
           static ApplicationBillingClient applicationBillingClient= null;
           private static BillingClient billingClient;

          private ApplicationBillingClient() {}

          private static boolean isInitialized()
     {
    return applicationBillingClient != null && billingClient != null;
}

private static void initialize(Context applicationContext)
{
    try
    {
        if(applicationContext != null)
        {
            applicationBillingClient = new ApplicationBillingClient();
            BillingClient.Builder builder=  BillingClient.newBuilder(applicationContext);
            builder.setListener(new PurchaseActivityListener());
            builder.enablePendingPurchases();
            billingClient = builder.build();
        }

        LogUtil.info("Initializing the Billing Client");

    }
    catch (Exception ex)
    {
        LogUtil.error("Error while initializing billing client", ex);
    }

}

public static ApplicationBillingClient getInstance(Context applicationContext)
{
    if(isInitialized() == false)
    {
        initialize(applicationContext);
    }

    return  applicationBillingClient;
}

public void startConnection()
{
   billingClient.startConnection(new StateListener());
}

public boolean isReady()
{
    return billingClient.isReady();
}

public void getMonthlySubscription()
{
    try
    {
        if(billingClient.isReady())
        {
            SkuDetailsParams.Builder skuBuilder = SkuDetailsParams.newBuilder();
            skuBuilder.setType(BillingClient.SkuType.SUBS);
            skuBuilder.setSkusList(Arrays.asList(new String[]{MONTHLY_BILLING_SUBSCRIPTION_SKU}));
            SkuDetailsParams params = skuBuilder.build();
            billingClient.querySkuDetailsAsync(params, new SkuDetailsListener());
        }

    }
        catch (Exception ex)
    {
        LogUtil.error("Error while querying async SKU for Monthly Subscription", ex);
    }
  }
 }

 //In your activity
 ApplicationBillingClient appBillingClient = 
 ApplicationBillingClient.getInstance(applicationContext);
        if (appBillingClient.isReady() == false)
        {
            appBillingClient.startConnection();
        }
        else
        {
           appBillingClient.getMonthlySubscription();
        }

---

您的代码没有说明您是否实现了BillingClientStateListener以及PurchaseUpdateListener。请参阅下面的答案。

List<String> skuList = new ArrayList<> ();
skuList.add("coins5");
SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
params.setSkusList(skuList).setType(SkuType.INAPP);

     public class ApplicationBillingClient
       {
           static ApplicationBillingClient applicationBillingClient= null;
           private static BillingClient billingClient;

          private ApplicationBillingClient() {}

          private static boolean isInitialized()
     {
    return applicationBillingClient != null && billingClient != null;
}

private static void initialize(Context applicationContext)
{
    try
    {
        if(applicationContext != null)
        {
            applicationBillingClient = new ApplicationBillingClient();
            BillingClient.Builder builder=  BillingClient.newBuilder(applicationContext);
            builder.setListener(new PurchaseActivityListener());
            builder.enablePendingPurchases();
            billingClient = builder.build();
        }

        LogUtil.info("Initializing the Billing Client");

    }
    catch (Exception ex)
    {
        LogUtil.error("Error while initializing billing client", ex);
    }

}

public static ApplicationBillingClient getInstance(Context applicationContext)
{
    if(isInitialized() == false)
    {
        initialize(applicationContext);
    }

    return  applicationBillingClient;
}

public void startConnection()
{
   billingClient.startConnection(new StateListener());
}

public boolean isReady()
{
    return billingClient.isReady();
}

public void getMonthlySubscription()
{
    try
    {
        if(billingClient.isReady())
        {
            SkuDetailsParams.Builder skuBuilder = SkuDetailsParams.newBuilder();
            skuBuilder.setType(BillingClient.SkuType.SUBS);
            skuBuilder.setSkusList(Arrays.asList(new String[]{MONTHLY_BILLING_SUBSCRIPTION_SKU}));
            SkuDetailsParams params = skuBuilder.build();
            billingClient.querySkuDetailsAsync(params, new SkuDetailsListener());
        }

    }
        catch (Exception ex)
    {
        LogUtil.error("Error while querying async SKU for Monthly Subscription", ex);
    }
  }
 }

 //In your activity
 ApplicationBillingClient appBillingClient = 
 ApplicationBillingClient.getInstance(applicationContext);
        if (appBillingClient.isReady() == false)
        {
            appBillingClient.startConnection();
        }
        else
        {
           appBillingClient.getMonthlySubscription();
        }