I'm developing an Android application which connects to an OBD2 device by Wifi and app can read Speed, RPM, Engine coolant temperature details etc. So wifi is used only for connecting with the OBD2 device(it doesn't have facility to connect with internet, only for communication with local clients). I also need an internet connection for web services. But after connecting my wifi I am not able to connect internet via my mobile data network in android.
The similar application is also developed for iOS. In iOS, I can use device over Wifi (Static Wifi setting) and Internet connection from my cellular network. It means configure my wifi with some static ip I am able to use mobile data network for Internet connection in iOS.
But in Android, If I use static wifi and check for Internet connection, it is not available.
How can I use Wifi and Internet connection both run parallel or any other way by configuring wifi settings in android ?
Best Answer
Firstly, the problem we may face here is that because there is no internet connection on WiFi network, HTTP data will not go through that connection. See Send request over WiFi (without connection) even if Mobile data is ON (with connection) on Android M for solution
However, I have faced issue where sometimes no HTTP request is successful. To solve this problem, we can use ConnectivityManager.requestNetwork() and Network.openConnection() to achieve this.
Make sure that Mobile data and WiFi network is enabled and Android Manifest has proper connections:
Variables:
Get the connectivity manager:
Build network callbacks:
Request networks:
Make the appropriate request like this:
Note: These functions are avaialble from Android Lollipop and above. So, it is necessary to use
Build.Version.SDK_INT
at appropriate place, like this: