Android开发Retrofit 之初体验

释放双眼,带上耳机,听听看~!
依赖
//retrofit2
implementation 'com.squareup.retrofit2:retrofit:2.1.0'
implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
implementation 'com.squareup.retrofit2:adapter-rxjava:2.1.0'
private RetrofitService service;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e("测试retrofit", "onCreate----");
setContentView(R.layout.load_more_view);
Retrofit retrofit = new Retrofit.Builder()  //创建Retrofit实例
.baseUrl("https://api.apiopen.top/")    //url头部
.addConverterFactory(GsonConverterFactory.create()) //返回的数据经过转换工厂转换成我们想要的数据,最常用的就是Gson
.build();   //构建实例
service = retrofit.create(RetrofitService.class);   //使用retrofit的create()方法实现请求接口类
request();
}
  //请求古诗的方法
private void request() {
Call<Poetry> call = service.getPoetry("静夜思");   //通过getPoetry()方法获取Call对象
call.enqueue(new Callback<Poetry>() {   //call入列发送请求,传入回调Callback,重写成功onRespons()与失败onFailure()方法,并编写相应逻辑
/**
* 请求成功
* */
@Override
public void onResponse(Call<Poetry> call, Response<Poetry> response) {  //返回的response中包含了所有信息,其中response.body就是响应主体
Log.e("Retrofit测试", "--------onSuccess-----------" + response.body().getResult().get(0).getTitle());
Log.e("Retrofit测试", "--------onSuccess-----------" + response.body().getResult().get(0).getAuthors());
Log.e("Retrofit测试", "--------onSuccess-----------" + response.body().getResult().get(0).getContent().replace("|", "n"));
if (response.body().getResult().size() > 0) {   //由于我们已经添加了Gson转换工厂,所以响应主体会被转换成Poetry对象,使用对象响应方法判断返回的古诗是否大于一首
//                    title.setText(response.body().getResult().get(0).getTitle());   //数据展示
//                    author.setText(response.body().getResult().get(0).getAuthors());
//                    String contentText = response.body().getResult().get(0).getContent().replace("|", "n"); //由于接口返回的古诗体用"|"代替换行,所以我们想要换行输出就要替换回来
//                    content.setText(contentText);
} else {
Toast.makeText(NetActivity.this, "这就触及到我的知识盲区了", Toast.LENGTH_SHORT).show();   //古诗没有大于一首
}
}
/**
* 请求失败
* */
@Override
public void onFailure(Call<Poetry> call, Throwable t) {
Log.d("ManiActivity", t.getMessage());  //控制台打印报错原因
Log.e("Retrofit测试", "--------onFail-----------" + t.getMessage());
}
});
}
package com.union_test.toutiao.RetrofitAbout;
import java.util.List;
/**
* Created by DaYu on 2019/5/23.
* Describe:
*/
public class Poetry {
private int error_code;
private String reason;
/**
* code : 200
* message : 成功!
* result : [{"title":"静夜思","content":"床前看月光,疑是地上霜。|举头望山月,低头思故乡。","authors":"李白"}]
*/
private int code;
private String message;
private List<ResultBean> result;
public int getError_code() {
return error_code;
}
public void setError_code(int error_code) {
this.error_code = error_code;
}
public String getReason() {
return reason;
}
public void setReason(String reason) {
this.reason = reason;
}
@Override
public String toString() {
return "Poetry{" +
"error_code=" + error_code +
", reason='" + reason + ''' +
'}';
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public List<ResultBean> getResult() {
return result;
}
public void setResult(List<ResultBean> result) {
this.result = result;
}
public static class ResultBean {
/**
* title : 静夜思
* content : 床前看月光,疑是地上霜。|举头望山月,低头思故乡。
* authors : 李白
*/
private String title;
private String content;
private String authors;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getAuthors() {
return authors;
}
public void setAuthors(String authors) {
this.authors = authors;
}
}
}
/**
* Created by DaYu on 2019/5/23.
* Describe:
*/
public interface RetrofitService {
//get请求接口
@GET("searchPoetry")    //指定请求类型的注解
Call<Poetry> getPoetry(@Query("name") String name);   //获取古诗的方法

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