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"><ImageViewandroid:id="@+id/item_image"android:layout_width="70dp"android:layout_height="70dp" /><LinearLayoutandroid:layout_width="0dp"android:layout_height="wrap_content"android:orientation="vertical"android:layout_weight="1"><TextViewandroid:id="@+id/item_title"android:layout_width="match_parent"android:layout_height="wrap_content"android:textAppearance="@android:style/TextAppearance.Large"/><TextViewandroid: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.ConstraintLayoutxmlns: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"><ListViewandroid: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;}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int position) {return list.get(position);}@Overridepublic long getItemId(int position) {return list.get(position).getId();}@Overridepublic 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;@Overrideprotected 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);}@Overridepublic void onResponse(Call<Tngou> call, Response<Tngou> response) {List<Cook> list = response.body().getList();}@Overridepublic 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";@Overrideprotected 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);}@Overridepublic void onResponse(Call<Channel> call, Response<Channel> response) {Channel channel = response.body();Log.e(TAG,String.valueOf(response.body()));}@Overridepublic void onFailure(Call<Channel> call, Throwable t) {}
}

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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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