黑莓10级联 - 检查互联网连接

I am developing an application for BB-10 using web service. In this I want to parse JSON in both the get and post methods and I want to check the Internet availability.

我正在使用Web服务开发BB-10应用程序。在这里我想在get和post方法中解析JSON，我想检查Internet的可用性。

How can I do this?

我怎样才能做到这一点？

4 个解决方案

#1

Check the Internet Availability using the below code

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());
}

#2

My teacher created a qml component that shows if there is connection and what kind of connection it is (wifi, bluetooth, carrier etc). It also sends a signal when the connection status or the interface used has changed.

我的老师创建了一个qml组件，显示是否存在连接以及它是什么类型的连接（wifi，蓝牙，运营商等）。当连接状态或使用的接口发生变化时，它也会发送信号。

The code is hosted at github: https://github.com/rodrigopex/CheckInternetMicroSample

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

#3

1.HPP FILE

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 FILE

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();
 }
 }

SEE FULL CODE HERE----> http://supportforums.blackberry.com/t5/Native-Development/webservice-help-json/m-p/2569953/highlight/false#M46724

在这里查看完整的代码----> http://supportforums.blackberry.com/t5/Native-Development/webservice-help-json/m-p/2569953/highlight/false#M46724

#4

1) You can check the internet available by the following method as per documentation:

1）您可以按照以下方法检查互联网：

bool QNetworkConfigurationManager::isOnline () const

bool QNetworkConfigurationManager :: isOnline（）const

Returns true if the system is considered to be connected to another device via an active network interface; otherwise returns false.

如果系统被认为通过活动网络接口连接到另一个设备，则返回true;否则返回false。

2) As for the json bits, you could use the json parser in Qt 5 as follows:

2）对于json位，可以使用Qt 5中的json解析器，如下所示：

JSON Support in Qt

Qt中的JSON支持

It is simple enough to bundle Qt 5 againt your application, but it will hopefully available on the platform soon.

将Qt 5捆绑在您的应用程序中非常简单，但很快就可以在平台上使用它。

Qt 5 on BlackBerry 10 - Beyond the Myth

关于黑莓10的Qt 5 - 超越神话

Failing that, it would be very simple to backport those few classes to Qt 4.

如果做不到这一点，那么将这几个类反向移植到Qt 4将非常简单。

#1