【Lesson5】在qml中检测网络状态变化

BirdZhang

代码来自 harbour-sailfinder

利用qml的dbus接口连接net.connman，获取状态。
简单的demo如下

import QtQuick 2.0
import Sailfish.Silica 1.0
import Nemo.DBus 2.0

Page{

    property bool networkStatus

    onNetworkStatusChanged: {
        if(networkStatus == false) {
            // Network connection failure
            // Do some thing
        }
    }


    // from https://github.com/DylanVanAssche/harbour-sailfinder/blob/develop/qml/harbour-sailfinder.qml
    DBusInterface {
        bus: DBus.SystemBus
        service: "net.connman"
        path: "/"
        iface: "net.connman.Manager"
        signalsEnabled: true
        Component.onCompleted: getStatus() // Init

        // Methods
        function getStatus() {
            typedCall("GetProperties", [], function(properties) {
                if(properties["State"] == "online") {
                    networkStatus = true
                }
                else {
                    networkStatus = false
                }
            },
            function(trace) {
                console.error("Network state couldn't be retrieved: " + trace)
            })
        }

        // Signals
        function propertyChanged(name, value) {
            if(name == "State") {
                if(value == "online") {
                    networkStatus = true
                }
                else {
                    networkStatus = false
                }
            }
        }
    }
    
}