首先 先添加依赖
RecyclerView的依赖(这里有版本问题,不过高版本可以兼容低版本)
compile 'com.android.support:recyclerview-v7:23.2.0'
OkHttp3的依赖
compile 'com.squareup.okhttp3:okhttp:3.2.0' compile 'com.squareup.okio:okio:1.7.0' 添加网络权限
<uses-permission android:name="android.permission.INTERNET"/>
在activity_main.xml布局中引用RecycleView控件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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.douya.recycler.activity.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
定义RecycleView的适配器
import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ImageView; import android.widget.TextView; import com.douya.recycler.R; import com.douya.recycler.bean.Bean; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.display.CircleBitmapDisplayer; import java.util.List; /** * Created by 杨圆圆 on 2017/9/28. */ public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyHolder>{ private Context context; private List<Bean.DataBean.ComicsBean> comics; private final DisplayImageOptions options; public MyAdapter(Context context, List<Bean.DataBean.ComicsBean> comics) { this.context = context; this.comics = comics; options = new DisplayImageOptions .Builder() .displayer(new CircleBitmapDisplayer()) .build(); } @Override public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) { //加载布局 View view = View.inflate(context, R.layout.item, null); //因为recycleView没法和父窗体适配,所以需要做适配,不然不能点击整个条目,只能点击对应的控件 //得到管理器 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); //得到宽度 int width = wm.getDefaultDisplay().getWidth(); RecyclerView.LayoutParams layoutParams=new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT); layoutParams.width=width; view.setLayoutParams(layoutParams); MyHolder holder=new MyHolder(view); return holder; } //将数据和Holder进行关联 @Override public void onBindViewHolder(MyHolder holder, int position) { Bean.DataBean.ComicsBean comicsBean = comics.get(position); holder.tv_title.setText(comicsBean.getTitle()); ImageLoader.getInstance().displayImage(comicsBean.getCover_image_url(),holder.iv_tu,options); } //返回总条目数 @Override public int getItemCount() { return comics.size(); } //ViewHolder类 public class MyHolder extends RecyclerView.ViewHolder{ private final TextView tv_title; private final ImageView iv_tu; public MyHolder(View itemView) { super(itemView); tv_title = (TextView) itemView.findViewById(R.id.tv_title); iv_tu = (ImageView) itemView.findViewById(R.id.iv_tu); } } }RecycleView的条目布局
<?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/iv_tu"
android:layout_width="100dp"
android:layout_height="80dp" />
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:background="#ffff00"
android:gravity="center_vertical"
android:text="标题"/>
</LinearLayout>
封装一个OKHttp工具类import java.util.Map; import okhttp3.Call; import okhttp3.Callback; import okhttp3.FormBody; import okhttp3.OkHttpClient; import okhttp3.Request; /** * 使用单例模式的懒汉式进行封装 * */ public class NetWorkUtils { //声明一个静态OKHttpclient对象 private static OkHttpClient okHttpClient; //定义一个私有的静态变量 private static NetWorkUtils netWorkUtils; //定义一个私有的静态构造方法 private NetWorkUtils() { } //定义一个公共的静态方法用来返回实例 public static NetWorkUtils getInstance(){ if(netWorkUtils==null){ synchronized (NetWorkUtils.class){ if(netWorkUtils==null){ netWorkUtils=new NetWorkUtils(); } } } return netWorkUtils; } //定义一个静态获取okHttpClient的方法 public static OkHttpClient getOkHttpInstance(){ if(okHttpClient==null){ okHttpClient=new OkHttpClient.Builder().build(); } return okHttpClient; } //定义一个get方法进行数据请求 public void doGet(String url, Callback callback){ //初始化OKHTTP对象 OkHttpClient httpClient=getOkHttpInstance(); //创建request对象 Request request=new Request.Builder().url(url).build(); //创建CallBack对象 Call call = httpClient.newCall(request); //进行异步请求 call.enqueue(callback); } //定义一个post方法进行数据请求 public void doPost(String url, Callback callback, Map<String,String> params){ //初始化OKHTTP对象 OkHttpClient httpClient=getOkHttpInstance(); //创建FormBody FormBody.Builder builder=new FormBody.Builder(); //遍历集合将值添加到FormBody for(String key: params.keySet()){ //根据key值获取value值 String value = params.get(key); builder.add(key,value); } FormBody body = builder.build(); //创建request对象 Request request=new Request.Builder() .url(url) .post(body) .build(); //创建CallBack对象 Call call = httpClient.newCall(request); call.enqueue(callback); } }
下面就在MainActivity中进行请求数据和RecycleView设置适配器
public class MainActivity extends AppCompatActivity { private Handler handler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); String str = (String) msg.obj; Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show(); //获取Gson对象 Gson gson=new Gson(); Bean bean = gson.fromJson(str, Bean.class); List<Bean.DataBean.ComicsBean> comics = bean.getData().getComics(); //初始化适配器 MyAdapter adapter=new MyAdapter(MainActivity.this,comics); //给recycleView添加适配器 recycler.setAdapter(adapter); } }; private RecyclerView recycler; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //查找组件 recycler = (RecyclerView) findViewById(R.id.recycler); //设置布局管理器 LinearLayoutManager manager=new LinearLayoutManager(this); recycler.setLayoutManager(manager); getData(); } private void getData(){ String url="http://api.kkmh.com/v1/daily/comic_lists/1487606400?since=0&gender=0"; NetWorkUtils.getInstance().doGet(url, new Callback() { @Override public void onFailure(Call call, IOException e) { } @Override public void onResponse(Call call, Response response) throws IOException { String string = response.body().string(); Message message=new Message(); message.obj=string; handler.sendMessage(message); } }); } } 注:适配器中的图片使用ImageLoader框架加载!!! 在Application中进行了全局配置