ResponseConvertFactory类的编写

Retrofit与Gson结合实现响应转换

最新推荐文章于 2024-07-04 09:24:47 发布

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最新推荐文章于 2024-07-04 09:24:47 发布

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本文介绍了一种使用Retrofit框架结合Gson库进行HTTP响应转换的方法。通过自定义ResponseConvertFactory，可以将服务器返回的JSON数据自动转换为Java对象，简化了数据解析过程。代码示例展示了如何配置OkHttpClient、Retrofit并创建服务接口。

代码如下:

import com.google.gson.Gson;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import okhttp3.ResponseBody;
import retrofit2.Converter;
import retrofit2.Retrofit;

/**
 * Created by Charles on 2016/3/17.
 */
public class ResponseConvertFactory extends Converter.Factory{

    /**
     * Create an instance using a default {@link Gson} instance for conversion. Encoding to JSON and
     * decoding from JSON (when no charset is specified by a header) will use UTF-8.
     */
    public static ResponseConvertFactory create() {
        return create(new Gson());
    }

    /**
     * Create an instance using {@code gson} for conversion. Encoding to JSON and
     * decoding from JSON (when no charset is specified by a header) will use UTF-8.
     */
    public static ResponseConvertFactory create(Gson gson) {
        return new ResponseConvertFactory(gson);
    }

    private final Gson gson;

    private ResponseConvertFactory(Gson gson) {
        if (gson == null) throw new NullPointerException("gson == null");
        this.gson = gson;
    }

    @Override
    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations,
                                                            Retrofit retrofit) {
        return new GsonResponseBodyConverter<>(gson,type);
    }

}

用法:

 OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS);

        retrofit = new Retrofit.Builder()
                .client(builder.build())
                .addConverterFactory(ResponseConvertFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl(BASE_URL)
                .build();

        movieService = retrofit.create(MovieService.class);