欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

第三方开源库之 Retrofit

程序员文章站 2023-12-25 16:17:57
...

当前版本:2.7.1
官方文档:https://square.github.io/retrofit/
Retrofit 是一个 RESTful 的 HTTP 网络请求框架的封装。

简介

第三方开源库之 Retrofit

使用

  1. 添加Retrofit库的依赖
  • 依赖
dependencies {
    ...
    implementation 'com.squareup.retrofit2:retrofit:2.7.1'
    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
}
  • 权限
<uses-permission android:name="android.permission.INTERNET"/>
  1. 创建 接收服务器返回数据 的类
    Translation.java
/**
 * created on 2020/2/11 10:18
 *
 * @author Scarf Gong
 */
public class Translation {

    /**
     * status : 1
     * content : {"from":"en-EU","to":"zh-CN","vendor":"wps","out":"你好世界","ciba_use":"来自机器翻译。","ciba_out":"","err_no":0}
     */

    private int status;
    private ContentBean content;

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public ContentBean getContent() {
        return content;
    }

    public void setContent(ContentBean content) {
        this.content = content;
    }

    public static class ContentBean {
        /**
         * from : en-EU
         * to : zh-CN
         * vendor : wps
         * out : 你好世界
         * ciba_use : 来自机器翻译。
         * ciba_out :
         * err_no : 0
         */

        private String from;
        private String to;
        private String vendor;
        private String out;
        private String ciba_use;
        private String ciba_out;
        private int err_no;

        public String getFrom() {
            return from;
        }

        public void setFrom(String from) {
            this.from = from;
        }

        public String getTo() {
            return to;
        }

        public void setTo(String to) {
            this.to = to;
        }

        public String getVendor() {
            return vendor;
        }

        public void setVendor(String vendor) {
            this.vendor = vendor;
        }

        public String getOut() {
            return out;
        }

        public void setOut(String out) {
            this.out = out;
        }

        public String getCiba_use() {
            return ciba_use;
        }

        public void setCiba_use(String ciba_use) {
            this.ciba_use = ciba_use;
        }

        public String getCiba_out() {
            return ciba_out;
        }

        public void setCiba_out(String ciba_out) {
            this.ciba_out = ciba_out;
        }

        public int getErr_no() {
            return err_no;
        }

        public void setErr_no(int err_no) {
            this.err_no = err_no;
        }

        @Override
        public String toString() {
            return "ContentBean{" +
                    "from='" + from + '\'' +
                    ", to='" + to + '\'' +
                    ", vendor='" + vendor + '\'' +
                    ", out='" + out + '\'' +
                    ", ciba_use='" + ciba_use + '\'' +
                    ", ciba_out='" + ciba_out + '\'' +
                    ", err_no=" + err_no +
                    '}';
        }
    }
}

  1. 创建 用于描述网络请求 的接口
/**
 * created on 2020/2/11 10:22
 *
 * @author Scarf Gong
 */
public interface IRequest {
    @GET("ajax.php?a=fy&f=auto&t=auto&w=hello%20world")
    Call<Translation> getCall();
}

  1. 创建 Retrofit 实例
  2. 创建 网络请求接口实例 并 配置网络请求参数
  3. 发送网络请求(异步 / 同步)
public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        request();
    }

    private void request() {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://fy.iciba.com/") // 设置 网络请求 Url
                .addConverterFactory(GsonConverterFactory.create()) //设置使用Gson解析(记得加入依赖)
                .build();

        IRequest request = retrofit.create(IRequest.class);

        //对发送请求进行封装
        Call<Translation> call = request.getCall();

        call.enqueue(new Callback<Translation>() {
            //请求成功时回调
            @Override
            public void onResponse(Call<Translation> call, Response<Translation> response) {
                //处理返回的数据结果
                int status = response.body().getStatus();
                Log.d(TAG, "onResponse: " + status);
            }

            //请求失败时回调
            @Override
            public void onFailure(Call<Translation> call, Throwable throwable) {
                Log.d(TAG, "连接失败");
            }
        });
    }
}

对比

除了Retrofit,如今Android中主流的网络请求框架有:

  • Android-Async-Http
  • Volley
  • OkHttp

第三方开源库之 Retrofit

上一篇:

下一篇: