Question

我使用改造将json对象发送到服务器，我试图创建一个用户，我发送这个json对象 public class FocusDataTrigger : StateTriggerBase { #region DataValue public static readonly DependencyProperty DataValueProperty = DependencyProperty.RegisterAttached("DataValue", typeof(object), typeof(FocusDataTrigger), new PropertyMetadata(null, DataValueChanged)); public static object GetDataValue(DependencyObject obj) { return obj.GetValue(DataValueProperty); } public static void SetDataValue(DependencyObject obj, object value) { obj.SetValue(DataValueProperty, value); } #endregion #region TriggerValue public static readonly DependencyProperty TriggerValueProperty = DependencyProperty.RegisterAttached("TriggerValue", typeof(object), typeof(FocusDataTrigger), new PropertyMetadata(false, TriggerValueChanged)); public static object GetTriggerValue(DependencyObject obj) { return obj.GetValue(TriggerValueProperty); } public static void SetTriggerValue(DependencyObject obj, object value) { obj.SetValue(TriggerValueProperty, value); } #endregion private static void TriggerStateCheck(DependencyObject target, object datavalue, object triggerValue) { FocusDataTrigger trigger = target as FocusDataTrigger; if (trigger == null) return; trigger.SetActive(triggerValue == datavalue); } private static void TriggerValueChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) { object datavalue = target.GetValue(FocusDataTrigger.DataValueProperty); TriggerStateCheck(target, datavalue, e.NewValue); } private static void DataValueChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) { object triggerValue = target.GetValue(FocusDataTrigger.TriggerValueProperty); TriggerStateCheck(target, e.NewValue, triggerValue); } }

在这个例子中我创建了一个无效的用户，所以服务器响应带有一个json对象，其中代码的代码是错误的，并告诉它错误的解释

{"apellido":"prueba","email":"prueba@hotmail.com","fechaDeNacimiento":"11/29/1998","formaDeRegistro":"Android","nombre":"prueba","password":"12345678","username":"prueba"}

接口

[{"code":"5","message":"The email is in use"}]

}

数据模型

public interface UserClient {


@POST("usuarios")
Call<Usuarios> create(@Body Usuarios usuario);

}

和改造实施

import com.google.gson.annotations.SerializedName;
public class Usuarios {

@SerializedName("username")
String username;
@SerializedName("email")
String email;
@SerializedName("password")
String password;
@SerializedName("nombre")
String nombre;
@SerializedName("apellido")
String apellido;
@SerializedName("fechaDeNacimiento")
String fechaDeNacimiento;
@SerializedName("formaDeRegistro")
String formaDeRegistro;

 String message;


public Usuarios(String email, String username, String password, String nombre, String apellido, String fechaDeNacimiento, String formaDeRegistro){
    this.username=username;
    this.email=email;
    this.password=password;
    this.nombre = nombre;
    this.apellido= apellido;
    this.fechaDeNacimiento = fechaDeNacimiento;
    this.formaDeRegistro = formaDeRegistro;
}

public String getMessage(){
    return message;
}

所以我可以看到logcat响应但是在它指定为null的正文中，我如何能够访问＆＃34;消息＆＃34;？

This is the logcat

Answer 1

该错误是因为您的响应不成功因此您需要解析错误正文，请尝试使用以下代码：

if (response.isSuccessful()) { 
// Do your success stuff...
 } else
 { 
try 
{ 
JSONObject jObjError = new JSONObject(response.errorBody().string());
 Toast.makeText(getContext(), jObjError.getString("message"), Toast.LENGTH_LONG).show();
 } catch (Exception e) {
 Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_LONG).show();
} 
}

当然，您可以使用其他解析器，如Gson。

为什么response.body（）为null？

1 个答案: