you are doing network operation
on main(UI) thread. do use asyntask
for network operation.
android does not allow to perform network operation on main thread. because it may freezes the UI
.
whenever this exception occur android.os.NetworkOnMainThreadException its mean you have done something network operation on UI.
Even though Service is intended for background processing they run in the main thread .
A short quote from the documentation:
Caution: A services runs in the same process as the application in which
it is declared and in the main thread of that application, by default. So,
if your service performs intensive or blocking operations while the user
interacts with an activity from the same application, the service will
slow down activity performance. To avoid impacting application performance,
you should start a new thread inside the service.