title: java.lang.IllegalArgumentException: @Url cannot be used with @GET URL (parameter #1)
body: <pre><code>@GET("user/token/")
  Observable&lt;String&gt; gToken(@Url String url, @Query("usertype") int userType);
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>Process: com.gouhuoapp.say, PID: 12519
  rx.exceptions.OnErrorNotImplementedException: @Url cannot be used with @GET URL (parameter #1)
      for method ApiService.getToken
      at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:386)
      at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:383)
      at rx.internal.util.ActionSubscriber.onError(ActionSubscriber.java:44)
      at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:153)
      at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
      at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:216)
      at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:139)
      at rx.observers.SerializedObserver.onNext(SerializedObserver.java:91)
      at rx.observers.SerializedSubscriber.onNext(SerializedSubscriber.java:94)
      at rx.internal.operators.OperatorTakeUntil$1.onNext(OperatorTakeUntil.java:45)
      at rx.internal.operators.OperatorThrottleFirst$1.onNext(OperatorThrottleFirst.java:53)
      at com.jakewharton.rxbinding.view.ViewClickOnSubscribe$1.onClick(ViewClickOnSubscribe.java:23)
      at android.view.View.performClick(View.java:4909)
      at android.view.View$PerformClick.run(View.java:20390)
      at android.os.Handler.handleCallback(Handler.java:815)
      at android.os.Handler.dispatchMessage(Handler.java:104)
      at android.os.Looper.loop(Looper.java:192)
      at android.app.ActivityThread.main(ActivityThread.java:5784)
      at java.lang.reflect.Method.invoke(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:372)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1084)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
   Caused by: java.lang.IllegalArgumentException: @Url cannot be used with @GET URL (parameter #1)
      for method ApiService.getToken
      at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:720)
      at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:711)
      at retrofit2.ServiceMethod$Builder.parameterError(ServiceMethod.java:729)
      at retrofit2.ServiceMethod$Builder.parseParameterAnnotation(ServiceMethod.java:367)
      at retrofit2.ServiceMethod$Builder.parseParameter(ServiceMethod.java:333)
      at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:202)
      at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:166)
      at retrofit2.Retrofit$1.invoke(Retrofit.java:145)
      at java.lang.reflect.Proxy.invoke(Proxy.java:397)
      at $Proxy3.getToken(Unknown Source)
      at com.gouhuoapp.say.data.DataManager.getToken(DataManager.java:83)
      at com.gouhuoapp.say.view.activity.RegisterMobileActivity.getQiniuToken(RegisterMobileActivity.java:171)
      at com.gouhuoapp.say.view.activity.RegisterMobileActivity.lambda$initTitle$4(RegisterMobileActivity.java:153)
      at com.gouhuoapp.say.view.activity.RegisterMobileActivity$$Lambda$7.call(Unknown Source)
      at rx.internal.util.ActionSubscriber.onNext(ActionSubscriber.java:39)
      at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:134)
          ... 15 more
  </code></pre>