[SailfishDevel] Detect network state & react on it
slava.monich at jolla.com
Sat Oct 8 10:02:38 UTC 2016
From QML, the easiest way is probably to monitor
/run/state/providers/connman/Internet/NetworkType with ContextProperty
object. Google for "qml contextkit contextproperty" to find some
examples. That way, statefs monitors connman state for you and you
You can achieve the same result by directly monitoring the connman state
over D-Bus. Then libconnman-qt is your friend. It's a C++ library with a
QML plugin (MeeGo.Connman). That requires a bit more code but takes
statefs out of the picture.
There are also Qt network configuration APIs but those are even more
complicated and not all of those might work the way you would expect
them to work. But this is the most platform-independent API in case if
that is important for you (probably not). Internally it also talks to
Connection selector has a D-Bus API which is easy enough to figure out
with dbus-monitor. However it's not an official API and it's more or
less guaranteed to change over time and break your app. Think twice
before starting to use it.
On 08/10/16 11:59, Dylan Van Assche wrote:
> Hi Sailors,
> For my app Sailfinder I have received a bug report about the network
> connection. When switching between mobile data & WiFi the app misbehaves.
> I want to detect the current network state to avoid thsi problem. I
> thought of several possibilities:
> Ping everytime to my website before doing other requests
> (expensive, better not).
> * Use MCE module which expose the network states in a file (that's
> what I found on the sailfishos.org website, no more extra
> information). This option is the one I want to try :)
> And if network isn't available I want to show the network connection
> dialog but I haven't find any information about it. Can someone help
> me with it? If possible, in a Harbour way since Sailfinder is also
> available in the Jolla Store.
> Kind regards,
> Dylan Van Assche
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