Amazon IAP Android PurchasingListener未被调用的原因可能是您尚未正确设置Amazon IAP SDK或未正确连接到Amazon Appstore。 您可以按照以下步骤解决此问题：

1. 确认Amazon IAP SDK正确设置并仔细检查您的代码是否正确连接到Amazon Appstore。
2. 确保您的Amazon IAP商品ID与您在Amazon开发人员门户中创建的商品ID匹配。
3. 检查Amazon IAP API中的调用是否正确，并确保调用了PurchasingService.registerListener方法。
4. 如果仍然无法解决此问题，请检查您的Amazon Appstore账户是否已获得访问您正在测试的商品的权限。

以下是示例代码：

import com.amazon.device.iap.PurchasingListener;
import com.amazon.device.iap.PurchasingService;

public class MyActivity extends Activity implements PurchasingListener {
    private static final String PRODUCT_ID = "my_product_id";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Register for the purchasing service
        PurchasingService.registerListener(this);

        // Start the process of getting the user's items
        PurchasingService.getProducts(new HashSet<>(Arrays.asList(PRODUCT_ID)));
    }

    // Implement PurchasingListener methods
    @Override
    public void onProductDataResponse(ProductDataResponse response) { 
        // Handle product data response 
    }

    @Override
    public void onPurchaseResponse(PurchaseResponse response) {
        // Handle purchase response 
    }

    @Override
    public void onPurchaseUpdatesResponse(PurchaseUpdatesResponse response) {
        // Handle purchase updates response 
    }

    @Override
    public void onUserDataResponse(UserDataResponse response) {
        // Handle user data response 
    }
}