Retrofit的简单应用

compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
//路径的封装类
public class Constant {
    //https://www.zhaoapi.cn/ad/getAd

    public static String base_url="https://www.zhaoapi.cn/";
}
//接口
public interface RetrofitInterface {

    @GET("ad/getAd")
    Call<DataDataBean> getStringJson();
}
//mainactivity
public class MainActivity extends AppCompatActivity {

    private ListView lv;
    private Call<QiuShiDataBean> call;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取控件
        lv = (ListView) findViewById(R.id.lv);
           //初始化
        initRetrofit();
    }

    private void initRetrofit() {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Constant.url_base)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
          //创建接口
        RetrofitInterface retrofitInterface = retrofit.create(RetrofitInterface.class);
         call = retrofitInterface.getData("latest", 2);
         call.enqueue(new Callback<QiuShiDataBean>() {
             @Override
             public void onResponse(Call<QiuShiDataBean> call, Response<QiuShiDataBean> response) {
                  if(response.isSuccess() && response.body()!=null){
                      List<QiuShiDataBean.ItemsBean> items = response.body().getItems();
                      //设置适配器
                      MyAdapter ma = new MyAdapter(items,MainActivity.this);
                        lv.setAdapter(ma);
                  }
             }

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

             }
         });


    }
}

----------------------路径存在参数时---------------------------
  
public class Constant {

    public static String url_base ="http://m2.qiushibaike.com/";

}
  
public interface RetrofitInterface {
    @GET("article/list/{type}?")
    Call<QiuShiDataBean> getData(@Path("type") String type, @Query("page") int page);



}

public class MainActivity extends AppCompatActivity {

    private ListView lv;
    private Call<QiuShiDataBean> call;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取控件
        lv = (ListView) findViewById(R.id.lv);
        //初始化
        initRetrofit();
    }

    private void initRetrofit() {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Constant.url_base)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        //创建接口
        RetrofitInterface retrofitInterface = retrofit.create(RetrofitInterface.class);
        call = retrofitInterface.getData("latest", 2);
        call.enqueue(new Callback<QiuShiDataBean>() {
            @Override
            public void onResponse(Call<QiuShiDataBean> call, Response<QiuShiDataBean> response) {
                if(response.isSuccess() && response.body()!=null){
                    List<QiuShiDataBean.ItemsBean> items = response.body().getItems();
                    //设置适配器
                    MyAdapter ma = new MyAdapter(items,MainActivity.this);
                    lv.setAdapter(ma);
                }
            }

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

            }
        });


    }
}