Retrofit框架（二）

一、GET请求列表数据展示

添加依赖

dependencies {
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta3'
}

item.xml

<?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="match_parent"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/item_image"
        android:layout_width="70dp"
        android:layout_height="70dp" />
    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_weight="1">
        <TextView
            android:id="@+id/item_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textAppearance="@android:style/TextAppearance.Large"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/item_info"
            android:maxLines="2"
            android:ellipsize="end"/>
    </LinearLayout>
</LinearLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.administrator.picassodemo.MainActivity">


    <ListView
        android:id="@+id/main_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </ListView>


</android.support.constraint.ConstraintLayout>

数据实体类

Cook.java

package com.administrator.picassodemo;

import com.google.gson.annotations.SerializedName;

/**
 * Created by Administrator on 2018/5/16.
 */

public class Cook {

    @SerializedName("id")
    private int id;
    @SerializedName("name")
    private String name;
    @SerializedName("food")
    private String food;
    @SerializedName("img")
    private String img;
    @SerializedName("images")
    private String images;
    @SerializedName("description")
    private String description;
    @SerializedName("keywords")
    private String keywords;
    @SerializedName("message")
    private String message;
    @SerializedName("count")
    private int count;
    @SerializedName("fcount")
    private int fcount;
    @SerializedName("rcount")
    private int rcount;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getFood() {
        return food;
    }

    public void setFood(String food) {
        this.food = food;
    }

    public String getImg() {
        return img;
    }

    public void setImg(String img) {
        this.img = img;
    }

    public String getImages() {
        return images;
    }

    public void setImages(String images) {
        this.images = images;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getKeywords() {
        return keywords;
    }

    public void setKeywords(String keywords) {
        this.keywords = keywords;
    }

    public String getMessage() {
        return message;
    }

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

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getFcount() {
        return fcount;
    }

    public void setFcount(int fcount) {
        this.fcount = fcount;
    }

    public int getRcount() {
        return rcount;
    }

    public void setRcount(int rcount) {
        this.rcount = rcount;
    }
}

返回的数据有集合数据，所以建立集合数据实体类

Tngou.java

package com.administrator.picassodemo;

import com.google.gson.annotations.SerializedName;

import java.util.List;

/**
 * Created by Administrator on 2018/5/16.
 */

public class Tngou {
    @SerializedName("status")
    private boolean status;
    @SerializedName("total")
    private int total;
    @SerializedName("tngou")
    private List<Cook> list;

    public boolean isStatus() {
        return status;
    }

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

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public List<Cook> getList() {
        return list;
    }

    public void setList(List<Cook> list) {
        this.list = list;
    }
}

建立数据加载适配器

MyAdapter.java

package com.administrator.picassodemo;

import android.content.Context;
import android.support.annotation.Nullable;
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 com.squareup.picasso.Picasso;

import java.util.Collection;
import java.util.List;

/**
 * Created by Administrator on 2018/5/16.
 */

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

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

    @Override
    public int getCount() {
        return list.size();
    }

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

    @Override
    public long getItemId(int position) {
        return list.get(position).getId();
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView == null){
            convertView = LayoutInflater.from(context)
                    .inflate(R.layout.item,parent,false);
        }
        ViewHolder holder = (ViewHolder)convertView.getTag();
        Cook cook = list.get(position);
        holder.title.setText(cook.getName());
        holder.info.setText(cook.getDescription());
        Picasso.with(context).load("http://tnfs.tngou.net/img"+cook.getImg()).into(holder.image);
        return convertView;
    }

    public void addAll(Collection<? extends Cook> collection){
        list.addAll(collection);
        notifyDataSetChanged();
    }
    public static class ViewHolder{
        private  ImageView image;
        private TextView title;
        private TextView info;
        public ViewHolder(View item) {
            image = (ImageView)item.findViewById(R.id.item_image);
            title = (TextView)item.findViewById(R.id.item_title);
            info = (TextView)item.findViewById(R.id.item_info);
        }
    }

}

建立接口文件

Service.java

package com.administrator.picassodemo;

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

/**
 * Created by Administrator on 2018/5/16.
 */

public interface Service {
    @GET("/api/{category}/list")//大括号内传参数，如果连接变化只存在一个参数区别，则改变传入参数即可
    Call<Tngou> getList(@Path("category") String category,@Query("id") int id, @Query("page") int page, @Query("rows")  int rows);
}

MainActivity.java

package com.administrator.picassodemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.GsonConverterFactory;
import retrofit2.Response;
import retrofit2.Retrofit;

public class MainActivity extends AppCompatActivity implements Callback<Tngou> {


    private MyAdapter adapter;
    private TextView mTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTextView = findViewById(R.id.tvContent);
        //addConverterFactory()解析下载数据
        Retrofit retrofit = new Retrofit.Builder().baseUrl("http://www.tngou.net")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        Service service = retrofit.create(Service.class);
        Call<Tngou> call = service.getList("cook",0,1,20);
//         Call<Tngou> call = service.getList("top",0,1,20);
        call.enqueue(this);

        ListView listView = (ListView)findViewById(R.id.main_list);
        adapter = new MyAdapter(this,new ArrayList<Cook>());
        listView.setAdapter(adapter);
    }


    @Override
    public void onResponse(Call<Tngou> call, Response<Tngou> response) {
        List<Cook> list = response.body().getList();
    }

    @Override
    public void onFailure(Call<Tngou> call, Throwable t) {
        t.printStackTrace();
    }
}

二、POST请求xml解析

添加依赖

dependencies {
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta3'
    compile('com.squareup.retrofit2:converter-simplexml:2.0.0-beta4') {
        exclude group: 'xpp3', module: 'xpp3'
        exclude group: 'stax', module: 'stax-api'
        exclude group: 'stax', module: 'stax'
    }
}

AndroidManifest.xml中添加网络访问权限

    <uses-permission android:name="android.permission.INTERNET"/>

Channel.java

package com.administrator.xmldemo;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Path;
import org.simpleframework.xml.Root;

import java.util.List;

/**
 * Created by Administrator on 2018/5/17.
 */
@Root(strict = false)//是否严格检查
public class Channel {
    @Path("channel")
    @Element(name = "title")
    private String title;
    @Path("channel")
    @ElementList(entry = "item",inline = true)
    private List<item> list;


    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public List<item> getList() {
        return list;
    }

    public void setList(List<item> list) {
        this.list = list;
    }
}

Item.java

package com.administrator.xmldemo;


import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

/**
 * Created by Administrator on 2018/5/17.
 */
@Root(strict = false)
public class Item {
    @Element(name = "title")
    private String title;
}

Service.java

package com.administrator.xmldemo;

import retrofit2.Call;
import retrofit2.http.GET;

/**
 * Created by Administrator on 2018/5/17.
 */

public interface Service {
    @GET("/protal.php?mod=rss&catid=")
    Call<Channel> getChannel();
}

MainActivity.java

package com.administrator.xmldemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;

public class MainActivity extends AppCompatActivity implements Callback<Channel> {

    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Retrofit retrofit = new Retrofit.Builder().baseUrl("http://www.inexus.co")
                .addConverterFactory(SimpleXmlConverterFactory.create()).build();
        Service service = retrofit.create(Service.class);
        Call<Channel> channel = service.getChannel();
        channel.enqueue(this);
    }

    @Override
    public void onResponse(Call<Channel> call, Response<Channel> response) {
                Channel channel = response.body();
        Log.e(TAG,String.valueOf(response.body()));
    }

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

    }
}

Retrofit框架（二）

一、GET请求列表数据展示

二、POST请求xml解析

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