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Updated 18 August 2017
We will need to handle and detect the offline error in Retrofit call, It is a basic requirement when we are implementing Offline Application or visible network error view.
How can it be possible?
Essentially, we will create a class that implements Interceptor so that we can perform a network connectivity and checks before executing the request.
NetworkConnectionInterceptor interceptor will handle every API call, when, if no network is found then it interrupts the normal flow of execution so we will create our own NoConnectivityException Exception class. that throws an Exception.
Add NetworkConnectionInterceptor with our retrofit Service client.
Finally, Detect Offline connection Exception in our Activity, Handler or Fragment.
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