Android 集中式错误处理改造2?

Android 集中式错误处理改造2?,android,retrofit2,Android,Retrofit2,在改造2之前,有一种集中处理错误的方法- new retrofit.RestAdapter.Builder() .setEndpoint(apiUrl) .setLogLevel(retrofit.RestAdapter.LogLevel.FULL) .setErrorHandler(new CustomErrorHandler(ctx)) 但现在在改型2中,RestAdapter已重命名为reformation,并且没有setErrorHand

在改造2之前,有一种集中处理错误的方法-

new retrofit.RestAdapter.Builder()
        .setEndpoint(apiUrl)
        .setLogLevel(retrofit.RestAdapter.LogLevel.FULL)
        .setErrorHandler(new CustomErrorHandler(ctx))

但现在在改型2中,RestAdapter已重命名为
reformation
,并且没有
setErrorHandler()
。是否有一种方法可以使用
Reformation.Builder()
?Reformation 2.0移动错误处理程序并使用新的
回调
,其中包括两种方法:

/** Successful HTTP response. */
public void onResponse(Response<T> response, Retrofit retrofit)````

/** Invoked when a network or unexpected exception occurred during the HTTP request. */
public void onFailure(Throwable t)
/**HTTP响应成功*/
公共响应(响应、改装)````
/**在HTTP请求期间发生网络或意外异常时调用*/
失效时的公共无效(可丢弃的t)
即使HTTP代码不是2xx或3xx,Reformation2.x仍将在
onResponse
中接收所有HTTP响应,这里您需要检查
onResponse
方法中的响应状态代码,并检查响应是否成功响应(通常为2xx或3xx)并进行正确的逻辑处理

我已经升级了Reformation2.x,我关于集中错误处理的解决方案是: 创建一个抽象类,该类使用onSuccess和onFailed两个方法扩展Reformation.Callback,onFailed不是抽象的,因为我总是在业务逻辑失败时执行相同的过程,在请求成功时执行不同的操作。 您可以参考示例代码

然后,当您需要发送http请求时,您需要实现onSuccess方法,并且您还可以在某些情况下覆盖onFailed方法,正如我在项目中提到的,在大多数情况下,我都以相同的方式处理失败的方法。 您可以参考我使用Reformation2发送post请求的示例


希望这能帮助你

我使用了Amir提出的类似解决方案,但我只是想知道这是否可以变得更简单。我尝试了以下方法:

public void onResponse(Response<T> response) {
        if (response.isSuccess()) {
            T resp = response.body();
            handleSuccessResponse(resp);

        } else {
            Response<StatusResponse> statusResponse = response.error(response.code(), response.errorBody());
            handleHttpErrorResponse(statusResponse);
        }
    }
public void onResponse(响应){
if(response.issucess()){
T resp=response.body();
handleSuccessResponse(resp);
}否则{
Response statusResponse=Response.error(Response.code(),Response.errorBody());
handleHttpErrorResponse(状态响应);
}
}
这样我就不需要到处传递改装实例了。但是,由于错误主体未成功解析为StatusResponse,所以我遗漏了一些内容。我不确定这在实践中意味着什么:

2.0.0-beta2中的更改为回调的onResponse回调提供了改造实例,该更改已恢复。为了允许错误体的反序列化,提供改装对象的边缘情况太多。为了适应这个用例,手动传递改装响应或实现自定义CallAdapter。Factory会自动这样做


好吧,您所要做的就是为故障情况使用自定义回调创建一个自定义的
调用适配器。改装repo有一个示例,显示了一个定制的
CallAdapter
。你可以在

下面是一个显示自定义调用适配器的示例(不适用于2.2.0之前的版本):

/*
*版权所有(C)2015 Square,Inc。
*
*根据Apache许可证2.0版(以下简称“许可证”)获得许可;
*除非遵守许可证,否则不得使用此文件。
*您可以通过以下方式获得许可证副本:
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
*除非适用法律要求或书面同意,软件
*根据许可证进行的分发是按“原样”进行分发的,
*无任何明示或暗示的保证或条件。
*请参阅许可证以了解管理权限和权限的特定语言
*许可证下的限制。
*/
包com.example.inversion;
导入java.io.IOException;
导入java.lang.annotation.annotation;
导入java.lang.reflect.ParameterizedType;
导入java.lang.reflect.Type;
导入java.util.concurrent.Executor;
导入javax.annotation.Nullable;
2.电话;;
导入2.2.0适配器;
2.回拨;
进口改装2.converter.gson.GsonConverterFactory;
2.回应;;
进口改装2.改装;
导入文件2.http.GET;
/**
*显示自定义{@link CallAdapter}的示例,该自定义{@link CallAdapter}将内置{@link Call}调整为自定义
*其回调具有更细粒度方法的版本。
*/
公共最终类ErrorHandlingAdapter{
/**为各种条件提供细粒度回调的回调*/
接口MyCallback{
/**要求[200300]响应*/
无效成功(响应);
/**要求401个答复*/
未经验证无效(响应);
/**要求[400500]回复,401除外*/
void clientError(响应);
/**要求[500600]响应*/
无效服务器错误(响应);
/**呼叫时出现网络错误*/
无效网络错误(IOE例外);
/**呼叫时发生意外错误*/
无效意外错误(可丢弃的t);
}
接口MyCall{
作废取消();
无效排队(MyCallback);
mycallclone();
//留给读者作为练习。。。
//TODO MyResponse execute()抛出MyHttpException;
}
公共静态类ErrorHandlingCallAdapterFactory扩展CallAdapter.Factory{
@重写public@Nullable CallAdapter get(
类型返回类型,注释[]注释,改装(改装){
if(getRawType(returnType)!=MyCall.class){
返回null;
}
if(!(返回类型instanceof ParameterizedType)){
抛出新的非法状态异常(
“MyCall必须具有泛型类型(例如MyCall)”;
}
类型responseType=getParameterUpperBound(0,(ParameteredType)returnType);
Executor callbackExecutor=改装.callbackExecutor();
返回新的ErrorHandlingCallAdapter(responseType,callbackExecutor);
}
私有静态最终类ErrorHandlingCallAdapter实现CallAdapter{
P
/*
 * Copyright (C) 2015 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.example.retrofit;

import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.concurrent.Executor;
import javax.annotation.Nullable;
import retrofit2.Call;
import retrofit2.CallAdapter;
import retrofit2.Callback;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.http.GET;

/**
 * A sample showing a custom {@link CallAdapter} which adapts the built-in {@link Call} to a custom
 * version whose callback has more granular methods.
 */
public final class ErrorHandlingAdapter {
  /** A callback which offers granular callbacks for various conditions. */
  interface MyCallback<T> {
    /** Called for [200, 300) responses. */
    void success(Response<T> response);
    /** Called for 401 responses. */
    void unauthenticated(Response<?> response);
    /** Called for [400, 500) responses, except 401. */
    void clientError(Response<?> response);
    /** Called for [500, 600) response. */
    void serverError(Response<?> response);
    /** Called for network errors while making the call. */
    void networkError(IOException e);
    /** Called for unexpected errors while making the call. */
    void unexpectedError(Throwable t);
  }

  interface MyCall<T> {
    void cancel();
    void enqueue(MyCallback<T> callback);
    MyCall<T> clone();

    // Left as an exercise for the reader...
    // TODO MyResponse<T> execute() throws MyHttpException;
  }

  public static class ErrorHandlingCallAdapterFactory extends CallAdapter.Factory {
    @Override public @Nullable CallAdapter<?, ?> get(
        Type returnType, Annotation[] annotations, Retrofit retrofit) {
      if (getRawType(returnType) != MyCall.class) {
        return null;
      }
      if (!(returnType instanceof ParameterizedType)) {
        throw new IllegalStateException(
            "MyCall must have generic type (e.g., MyCall<ResponseBody>)");
      }
      Type responseType = getParameterUpperBound(0, (ParameterizedType) returnType);
      Executor callbackExecutor = retrofit.callbackExecutor();
      return new ErrorHandlingCallAdapter<>(responseType, callbackExecutor);
    }

    private static final class ErrorHandlingCallAdapter<R> implements CallAdapter<R, MyCall<R>> {
      private final Type responseType;
      private final Executor callbackExecutor;

      ErrorHandlingCallAdapter(Type responseType, Executor callbackExecutor) {
        this.responseType = responseType;
        this.callbackExecutor = callbackExecutor;
      }

      @Override public Type responseType() {
        return responseType;
      }

      @Override public MyCall<R> adapt(Call<R> call) {
        return new MyCallAdapter<>(call, callbackExecutor);
      }
    }
  }

  /** Adapts a {@link Call} to {@link MyCall}. */
  static class MyCallAdapter<T> implements MyCall<T> {
    private final Call<T> call;
    private final Executor callbackExecutor;

    MyCallAdapter(Call<T> call, Executor callbackExecutor) {
      this.call = call;
      this.callbackExecutor = callbackExecutor;
    }

    @Override public void cancel() {
      call.cancel();
    }

    @Override public void enqueue(final MyCallback<T> callback) {
      call.enqueue(new Callback<T>() {
        @Override public void onResponse(Call<T> call, Response<T> response) {
          // TODO if 'callbackExecutor' is not null, the 'callback' methods should be executed
          // on that executor by submitting a Runnable. This is left as an exercise for the reader.

          int code = response.code();
          if (code >= 200 && code < 300) {
            callback.success(response);
          } else if (code == 401) {
            callback.unauthenticated(response);
          } else if (code >= 400 && code < 500) {
            callback.clientError(response);
          } else if (code >= 500 && code < 600) {
            callback.serverError(response);
          } else {
            callback.unexpectedError(new RuntimeException("Unexpected response " + response));
          }
        }

        @Override public void onFailure(Call<T> call, Throwable t) {
          // TODO if 'callbackExecutor' is not null, the 'callback' methods should be executed
          // on that executor by submitting a Runnable. This is left as an exercise for the reader.

          if (t instanceof IOException) {
            callback.networkError((IOException) t);
          } else {
            callback.unexpectedError(t);
          }
        }
      });
    }

    @Override public MyCall<T> clone() {
      return new MyCallAdapter<>(call.clone(), callbackExecutor);
    }
  }
}
Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("http://httpbin.org")
    .addCallAdapterFactory(new ErrorHandlingCallAdapterFactory())
    .addConverterFactory(GsonConverterFactory.create())
    .build();

HttpBinService service = retrofit.create(HttpBinService.class);
MyCall<Ip> ip = service.getIp();

ip.enqueue(new MyCallback<Ip>() {

    @Override public void success(Response<Ip> response) {
    System.out.println("SUCCESS! " + response.body().origin);
    }

    @Override public void unauthenticated(Response<?> response) {
    System.out.println("UNAUTHENTICATED");
    }

    @Override public void clientError(Response<?> response) {
    System.out.println("CLIENT ERROR " + response.code() + " " + response.message());
    }

    @Override public void serverError(Response<?> response) {
    System.out.println("SERVER ERROR " + response.code() + " " + response.message());
    }

    @Override public void networkError(IOException e) {
    System.err.println("NETWORK ERROR " + e.getMessage());
    }

    @Override public void unexpectedError(Throwable t) {
    System.err.println("FATAL ERROR " + t.getMessage());
    }
});