簡介

• Gson Converter官網(wǎng)。
• 注意到 Retrofit 所有的接口定義都是返回Call<ResponseBody>，但是其實(shí)可以是別的類型，比如Call<Blog>，這需要相應(yīng)的Converter。

反序列化示例（Json字符串->Model對象）

1. 定義Model

public interface BlogService {
    @GET("blog/{id}")
    Call<Blog> getFirstBlog(@Path("id") int id);
}

2. 創(chuàng)建Gson

Gson gson = new GsonBuilder()
        .setDateFormat("yyyy-MM-dd hh:mm:ss")
        .create();

3. 創(chuàng)建Retrofit

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("http://localhost:4567/")
        .addConverterFactory(GsonConverterFactory.create(gson))
        .build();

4. 創(chuàng)建Model

BlogService service = retrofit.create(BlogService.class);

5. 創(chuàng)建Call

Call<Blog> call = service.getBlog(2);

6. 執(zhí)行Call

call.enqueue(new Callback<Blog>() {
    @Override
    public void onResponse(Call<Blog> call, Response<Blog> response) {
        // 已經(jīng)轉(zhuǎn)換為想要的類型了
        Blog result = response.body();
        System.out.println(result);
    }

    @Override
    public void onFailure(Call<Blog> call, Throwable t) {
        t.printStackTrace();
    }
});

序列化示例（Model對象->Json字符串）

1. 定義Model

public interface BlogService {
    @POST("blog")
    Call<Blog> createBlog(@Body Blog blog);
}

2. 構(gòu)建Gson

Gson gson = new GsonBuilder()
        .setDateFormat("yyyy-MM-dd hh:mm:ss")
        .create();

3. 構(gòu)建Retrofit

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("http://localhost:4567/")
        .addConverterFactory(GsonConverterFactory.create(gson))
        .build();

4. 創(chuàng)建Model

BlogService service = retrofit.create(BlogService.class);

5. 創(chuàng)建Call

Blog blog = new Blog();
blog.content = "新建的Blog";
blog.title = "測試";
blog.author = "name";
Call<Blog> call = service.createBlog(blog);

6. 執(zhí)行Call

call.enqueue(new Callback<Blog>() {
    @Override
    public void onResponse(Call<Blog> call, Response<Blog> response) {
        // 已經(jīng)轉(zhuǎn)換為想要的類型了
        Blog result = response.body();
        System.out.println(result);
    }

    @Override
    public void onFailure(Call<Blog> call, Throwable t) {
        t.printStackTrace();
    }
});