Retrofit 网络请求

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先看效果：

1.bean类：

package com.example.administrator.retrofit;
import java.util.List;
public class Cook {
    private String message;
    private String nu;
    private String ischeck;
    private String com;
    private String status;
    private String condition;
    private String state;

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public String getNu() {
        return nu;
    }

    public void setNu(String nu) {
        this.nu = nu;
    }

    public String getIscheck() {
        return ischeck;
    }

    public void setIscheck(String ischeck) {
        this.ischeck = ischeck;
    }

    public String getCom() {
        return com;
    }

    public void setCom(String com) {
        this.com = com;
    }

    public String getStatus() {
        return status;
    }

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

    public String getCondition() {
        return condition;
    }

    public void setCondition(String condition) {
        this.condition = condition;
    }

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    private List<DataBean> data;

    public  class DataBean {
        public String getTime() {
            return time;
        }

        public void setTime(String time) {
            this.time = time;
        }

        public String getContext() {
            return context;
        }

        public void setContext(String context) {
            this.context = context;
        }

        public String getFtime() {
            return ftime;
        }

        public void setFtime(String ftime) {
            this.ftime = ftime;
        }

        private String time;
        private String context;
        private String ftime;
    }
}
2.Service接口：

package com.example.administrator.retrofit;

import retrofit.Call;
import retrofit.http.POST;
import retrofit.http.Query;
public interface Service {
    @POST("query")
    Call<Cook> search(@Query("type") String type, @Query("postid") String postid);
}

3.MainActivity：

package com.example.administrator.retrofit;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import java.util.List;
import retrofit.Call;
import retrofit.Callback;
import retrofit.GsonConverterFactory;
import retrofit.Response;
import retrofit.Retrofit;

public class MainActivity extends AppCompatActivity implements Callback<Cook> {
    private ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        创建Retrofit实例
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://www.kuaidi100.com/")//设置URL
                .addConverterFactory(GsonConverterFactory.create())
                .build();
//        创建接口，通过接口获取到网络接口服务
        Service service = retrofit.create(Service.class);
//        获取到接口的Call
        Call<Cook> call = service.search("yuantong", "500379523313");
//        请求数据
        call.enqueue(this);
        lv = (ListView) findViewById(R.id.json_lv);
    }

    @Override
    public void onResponse(Response<Cook> response, Retrofit retrofit) {
        List<Cook.DataBean> data = response.body().getData();
        lv.setAdapter(new MyAdapter(MainActivity.this, data));
    }

    @Override
    public void onFailure(Throwable t) {

    }
}

4.适配器：

package com.example.administrator.retrofit;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;

public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<Cook.DataBean> list;

    public MyAdapter(Context context, List<Cook.DataBean> list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public int getCount() {
        if (list != null) {
            return list.size();
        }
        return 0;
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
            convertView.setTag(new ViewHolder(convertView));
        }
        ViewHolder holder = (ViewHolder) convertView.getTag();
        Cook.DataBean dataBean = list.get(position);
        holder.tv_title.setText(dataBean.getContext());
        holder.tv_info.setText(dataBean.getFtime());
        //使用同样开发团队的Picasso支持包进行图片加载，由于接口中返回的img路径不是全的，所以需要加上网站前缀
//        Picasso.with(context).load("http://tnfs.tngou.net/img" + cook.getData().get(position)).into(holder.iv);
        return convertView;
    }
    public static class ViewHolder {
        private final ImageView iv;
        private final TextView tv_title;
        private final TextView tv_info;

        public ViewHolder(View item) {
            iv = ((ImageView) item.findViewById(R.id.item_iv));
            tv_title = ((TextView) item.findViewById(R.id.item_title));
            tv_info = ((TextView) item.findViewById(R.id.item_info));
        }
    }
}

5.布局i:

activity_main:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.retrofit.MainActivity">
    <ListView
        android:id="@+id/json_lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ListView>
</LinearLayout>

item：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/item_iv"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:src="@mipmap/ic_launcher" />

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_weight="1"
        android:orientation="vertical">

        <TextView
            android:id="@+id/item_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="标题"
            android:textAppearance="@android:style/TextAppearance.Large" />

        <TextView
            android:id="@+id/item_info"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:maxLines="2"
            android:text="abcabcacbacbacbacbacbacacacacacasdadasd" />
    </LinearLayout>
</LinearLayout>