I'm using retrofit to get and post data from the server. However, if my phone loses internet connection in middle of the app then I see error like this:
05-10 08:12:05.559 29369-29400/? D/Retrofit﹕ java.net.UnknownHostException: Unable to resolve host "my.server.com": No address associated with hostname
at java.net.InetAddress.lookupHostByName(InetAddress.java:394)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
I would like to handle this error gracefully. I would like to catch the exception and show a toast message like "No internet connection".
I'm trying code like this but I get an error that: java.net.UnknownHostException is never thrown in the try block
try {
isTokenValid = MyManager.INSTANCE.getService().validate();
}
catch (RetrofitError cause) {
Response r = cause.getResponse();
if (r != null && r.getStatus() == 403) {
isTokenValid = false;
}
}
catch (UnknownHostException exception) {
Toast.makeText(getBaseContext(), "No internet connection", Toast.LENGTH_SHORT).show();
}
I think you need to have a retrofit exception in the catch.
catch (RetrofitError error) {
methodToDeterminErrorType(error);
}
The RetroFitError is a generic runtime exception. Once it hits the catch block you can actually verify what kind of a error was actually thrown by retrofit. Retrofit has a method isNetworkError() which is what you are probably looking for. So you can basically do something like this:
methodToDetermineErrorType(RetroFitError error) {
if (error.isNetworkType()) {
// show a toast
}
}
Hope this helps.
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