黑莓10级联-检查互联网连接

Question

我正在为BB-10开发一个使用web服务的应用程序。在这里，我想同时解析get和post方法中的JSON，并检查Internet的可用性。

我该怎么做呢？

Answer 1

使用以下代码检查Internet可用性

bool app::isNetworkAvailable() {
    QNetworkConfigurationManager netMgr;
    QList<QNetworkConfiguration> mNetList = netMgr.allConfigurations(QNetworkConfiguration::Active);

    return (mNetList.count() > 0 && netMgr.isOnline());
}

Answer 2

我的老师创建了一个qml组件，用来显示是否有连接以及连接的类型(wifi、蓝牙、运营商等)。它还会在连接状态或使用的接口发生更改时发送信号。

代码托管在github：https://github.com/rodrigopex/CheckInternetMicroSample上

Answer 3

1.HPP文件

class controller : public QObject
{
 Q_OBJECT
public:
 controller(bb::cascades::Application *app);


public Q_SLOTS:
 void sendRequest(const QString &countryID);


private Q_SLOTS:

void onFinished();

};

2.CPP文件

void controller::sendRequest(const QString &countryID)
{

QNetworkAccessManager* networkAccessManager = new QNetworkAccessManager(this);

const QString queryUri = QString::fromLatin1("http://192.168.1.251:410/Mobile/Service1.svc/english/Category?CountryID=%1").arg(countryID);

QNetworkRequest request(queryUri);

QNetworkReply* reply = networkAccessManager->get(request);

bool ok = connect(reply, SIGNAL(finished()), this, SLOT(onFinished()));
 Q_ASSERT(ok);
 Q_UNUSED(ok);
}


void controller::onFinished()
{
 QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
 QString response;
 if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200)
 {
 JsonDataAccess jda;
 QVariantMap map = jda.loadFromBuffer(reply->readAll()).toMap();

QVariantList addresses = map["GetCategoryResult"].toList();

foreach(QVariant var, addresses) {
 QVariantMap addressMap = var.toMap();

qDebug() << "CategoryName is " << addressMap["CategoryName"].toString();
 qDebug() << "CategoryID is " << addressMap["CategoryID"].toString();
 }
 }
 else {
 qDebug() << "Server returned code " << reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
 }
 }

请在此处查看完整代码-> http://supportforums.blackberry.com/t5/Native-Development/webservice-help-json/m-p/2569953/highlight/false#M46724