PaymentEngine 对象始终为 null
我正在尝试在 BlackBerry jde 版本 5.0.0.14 上构建支付应用程序。当我调试代码时，PaymentEngine 对象始终为 null。为什么会出现这种情况？我的代码有什么错误吗？
private PaymentEngine engine = PaymentEngine.getInstance();
public PurchaseDemoScreen()
{
setTitle("Payment Service SDK Demo");
if (engine != null)
{
engine.setConnectionMode(PaymentEngine.CONNECTION_MODE_LOCAL);
//do shopping
}
else
{
//in-app purchase unavilable
}
}
I am trying to build a payment appication on BlackBerry jde version 5.0.0.14. When I debug the code, PaymentEngine object is always null. Why does this happen? Is there any fault in my code?
private PaymentEngine engine = PaymentEngine.getInstance();
public PurchaseDemoScreen()
{
setTitle("Payment Service SDK Demo");
if (engine != null)
{
engine.setConnectionMode(PaymentEngine.CONNECTION_MODE_LOCAL);
//do shopping
}
else
{
//in-app purchase unavilable
}
}
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您安装了哪个版本的 BlackBerry App World？
如果 BlackBerry 设备未安装 BlackBerry App World 2.1 或更高版本，则返回 null。
What version of the BlackBerry App World do you have installed?
does return null if the BlackBerry device does not have BlackBerry App World 2.1 or higher installed.