如何在Retrofit 2中使用AutoValue?

本文介绍了如何在Retrofit 2中使用AutoValue?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我已经在项目中使用了AutoValue(和android-apt插件)，并且我知道Ryan Harter对AutoValue的gson扩展，但是我该如何挂钩Retrofit 2以在其上使用扩展和工厂方法抽象类?

  String grantType ="password";呼叫< SignIn>signInCall = retrofitApi.signIn(电子邮件，密码，grantType);signInCall.enqueue(回调);

例如，在这里，我想将AutoValue与SignIn JSON模型对象一起使用以实现不可变性，但是我该如何将Retrofit(或者更具体地说是Gson)连接到不可变的AutoValue模型类?

解决方案

[更新]库有所更改，请在此处查看更多信息:

如何创建和使用实时模板.

I've got AutoValue (and the android-apt plugin) working in a project, and I'm aware of Ryan Harter's gson extension for AutoValue, but how do I hook Retrofit 2 up to use the extension and factory method on the abstract class?

String grantType = "password";
Call<SignIn> signInCall = retrofitApi.signIn(email, password, grantType);
signInCall.enqueue(callback);

eg here I would like to use AutoValue with the SignIn JSON model object to enforce immutability but how do I hook up Retrofit (or perhaps more specifically Gson) to the immutable, AutoValue model class?

解决方案

[update] The library have changed a bit, check more here: https://github.com/rharter/auto-value-gson

I was able to make it work like this. I hope it will help you.

Import in your gradle app file
apt 'com.ryanharter.auto.value:auto-value-gson:0.3.1'

Create object with autovalue:

@AutoValue public abstract class SignIn {    
    @SerializedName("signin_token") public abstract String signinToken();
    @SerializedName("user") public abstract Profile profile();

    public static TypeAdapter<SignIn> typeAdapter(Gson gson) {
        return new AutoValue_SignIn.GsonTypeAdapter(gson);
    }
}

Create your Type Adapter Factory (Skip if using version > 0.3.0)

public class AutoValueGsonTypeAdapterFactory implements TypeAdapterFactory {

    public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
        Class<? super T> rawType = type.getRawType();

        if (rawType.equals(SignIn.class)) {
            return (TypeAdapter<T>) SignIn.typeAdapter(gson);
        } 

        return null;
    }
}

Create your Gson converter with your GsonBuilder

GsonConverterFactory gsonConverterFactory = GsonConverterFactory.create(
        new GsonBuilder()
                .registerTypeAdapterFactory(new AutoValueGsonTypeAdapterFactory())
                .create());

Add it to your retrofit builder

Retrofit retrofit = new Retrofit
        .Builder()
        .addConverterFactory(gsonConverterFactory)
        .baseUrl("http://url.com/")
        .build()

Do your request
Enjoy

Bonus live template:
In your autovalue class, type avtypeadapter then autocomplete to generate the type adapter code. To work you need to add this as a live template in Android Studio.

public static TypeAdapter<$class$> typeAdapter(Gson gson) {
    return new AutoValue_$class$.GsonTypeAdapter(gson);
}

How to create and use the live template.

这篇关于如何在Retrofit 2中使用AutoValue?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！