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前言

本博客仅做学习笔记，如有侵权，联系后即刻更改

科普：

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使用步骤

1. gradle文件引入依赖

//网络数据申请
    implementation("com.squareup.okhttp3:okhttp:4.9.3")
    implementation'com.squareup.retrofit2:retrofit:2.9.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
    //RetrofitUtils
    implementation 'com.squareup.okhttp3:logging-interceptor:4.9.3'
    annotationProcessor 'androidx.room:room-compiler:2.3.0'
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2. 引入网络请求拦截器文件

import android.util.Log;

import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class RetrofitUtils {

    public static Retrofit getRetrofit(String url) {
        //日志显示级别
        HttpLoggingInterceptor.Level level= HttpLoggingInterceptor.Level.BODY;
        //新建log拦截器
        HttpLoggingInterceptor loggingInterceptor=new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
            @Override
            public void log(String message) {
                Log.d("RetrofitMessage","OkHttp====Message:"+message);
            }
        });
        loggingInterceptor.setLevel(level);
        //定制OkHttp
        OkHttpClient.Builder httpClientBuilder = new OkHttpClient
                .Builder();
        //OkHttp进行添加拦截器loggingInterceptor
        httpClientBuilder.addInterceptor(loggingInterceptor);

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(url)
                .addConverterFactory(GsonConverterFactory.create())
                .client( httpClientBuilder.build())
                .build();

        return retrofit;
    }

}
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3. 新建一个Api.java文件，引入对应Api

import com.hnucm.coursedesign.Type.TypeHistory;
import com.hnucm.coursedesign.Type.TypeMusic;
import com.hnucm.coursedesign.Type.TypeNews;
import com.hnucm.coursedesign.Type.TypePoetry;
import com.hnucm.coursedesign.Type.TypeSearchNews;
import com.hnucm.coursedesign.Type.TypeVideos;
import com.hnucm.coursedesign.Type.TypeWeatherResponse;

import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Header;
import retrofit2.http.Query;

public interface Api {
    //   https://api.asilu.com/today
    @GET("today")
    Call<TypeHistory> getHistory();
}
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4. 创建一个类，与网络请求api的格式一致

import java.util.List;

public class TypeHistory {

    public int code;
    public String month;
    public String day;
    public List<DataDTO> data;

    public static class DataDTO {
        public int year;
        public String title;
        public String link;
        public String type;
    }
}
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5. Java文件创建api实例

//          加载历史上的今天的API资源
        Api api = RetrofitUtils.getRetrofit("https://api.asilu.com").create(Api.class);
        Call<TypeHistory> historyCall = api.getHistory();
        historyCall.enqueue(new Callback<TypeHistory>() {
            @Override
            public void onResponse(Call<TypeHistory> call, Response<TypeHistory> response) {
                TypeHistory typeHistory = response.body();
                myAdapter2 = new MyAdapter();
                recyclerView.setAdapter(myAdapter2);
                num = typeHistory.data.size();
                for (int i=0; i < num; i++){
                    year_list.add(typeHistory.data.get(i).year);
                    title_list.add(typeHistory.data.get(i).title);
                    historyUrl_list.add(typeHistory.data.get(i).link);
                }
                myAdapter2.notifyDataSetChanged();

            }

            @Override
            public void onFailure(Call<TypeHistory> call, Throwable t) {

            }
        });

    }
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总结

小小励志

有些事你现在不做，一辈子都不会做了。
如果你想做一件事，全世界都会为你让路。
《搭车去柏林》