I use retrofit2 to connect to an api and receive data The data is nested
D/OkHttp: {"success":{"token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9}}
If the data is as in the example above, it will be received without any problems But if it is as follows, it gives an error
D/OkHttp: {"message":"Unauthenticated."}
I do this for the first example
data class Response(var success : AutoLoginUser)
data class AutoLoginUser(var token: String)
...
...
...
Log.w("OK FROM SERVER", response.body()!!.success!!.token)
And for the second example, I do the following
data class UserDetails(var message : String)
...
...
...
Log.w("OK FROM SERVER", response.body()!!.message)
The error I get for the second example
D/OkHttp: <-- 401 Unauthorized http://192.168.1.8/api/details (252ms)
Host: 192.168.1.8
Date: Wed, 02 Dec 2020 09:01:03 GMT
Connection: close
X-Powered-By: PHP/7.4.12
Cache-Control: no-cache, private
Date: Wed, 02 Dec 2020 09:01:03 GMT
Content-Type: application/json
Access-Control-Allow-Origin: *
D/OkHttp: {"message":"Unauthenticated."}
<-- END HTTP (30-byte body)
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: ir.i9i.splendor, PID: 5740
java.lang.NullPointerException
at ir.i9i.splendor.Profile$getUserDetails$1.onResponse(Profile.kt:39)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:70)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
You can handle it with
errorBody()
in youronResponse()
method ofRetrofit
:Because you retrieved
401
error response, you'll be able to handle such errors inonResponse()
method.