未从 MarketBillingService 获取 onServiceDisconnected

Question

当我尝试根据 Google Dungeons 示例实现应用内购买时，似乎出现了资源泄漏。

当 MarketbillingService 在 unbind() 函数中调用 unbindService() 后没有调用 onServiceDisconnected() 时（所有这些都在 BillingService 类中），就会出现问题。

所以我的问题是：如何将 ServiceConnection 发布到 MarketBillingService？

/**
 * This class sends messages to Android Market on behalf of the application by
 * connecting (binding) to the MarketBillingService. The application
 * creates an instance of this class and invokes billing requests through this service.
 *
 * The {@link BillingReceiver} class starts this service to process commands
 * that it receives from Android Market.
 *
 * You should modify and obfuscate this code before using it.
 */
public class BillingService extends Service implements ServiceConnection {

 [...]

/**
 * Unbinds from the MarketBillingService. Call this when the application
 * terminates to avoid leaking a ServiceConnection.
 */
public void unbind() {
    try {
        unbindService(this);
    } catch (IllegalArgumentException e) {
        // This might happen if the service was disconnected
    }
}


/**
 * This is called when we are disconnected from the MarketBillingService.
 */
public void onServiceDisconnected(ComponentName name) {
    Log.w(TAG, "Billing service disconnected");
    mService = null;
}