Retrofit2 get同步请求

请求步骤：

1，定义接口（封装URL地址和数据请求）
2，实例化Retrofit
3，通过Retrofit实例创建接口服务对象
4，接口服务对象调用接口中的方法，获取Call对象
5，Call对象执行请求（异步、同步请求）

目录

1. 定义接口

ApiService.java

import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.http.GET;

/**
 * Created on 2019/5/16 10:34
 *
 * @author Q.PeterGuo
 * @version 1.0.0
 * @Description
 */
public interface ApiService {

    String WEAL_URL = "http://gank.io/api/data/%E7%A6%8F%E5%88%A9/";

    @GET("10/1")
    Call getWealData();

}

2. 在主页面进行网络请求

GetActivity.java

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.example.guolei.retrofit_demo.ok.ApiService;

import java.io.IOException;

import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;

/**
 * Created on 2019/5/16 10:33
 *
 * @author Q.PeterGuo
 * @version 1.0.0
 * @Description
 */
public class GetActivity extends AppCompatActivity implements View.OnClickListener {


    private Button bt_categories;
    private TextView tv;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_demo);
        initView();

    }


    private void initView() {
        bt_categories = (Button) findViewById(R.id.bt_categories);
        tv = (TextView) findViewById(R.id.tv);

        bt_categories.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt_categories:

                GetExecute();

                break;
        }
    }

    private void GetExecute() {
        //1.创建Retrofit对象
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(ApiService.WEAL_URL)
                .build();

        //2.获取ApiService 接口服务对象
        ApiService apiService = retrofit.create(ApiService.class);

        //3.获取Call 对象
        final Call call = apiService.getWealData();

        new Thread(new Runnable() { //子线程执行
            @Override
            public void run() {

                //4.Call对象执行请求
                try {
                    Response response = call.execute();

                    final String result = response.body().string();

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            tv.setText(result); //默认直接回调主线程
                        }
                    });

                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }).start();
    }
}