recyclerview+okhttp+glide实现网络请求加载图片列表

导入依赖

compile 'com.squareup.okhttp3:okhttp:3.8.1'

compile 'com.google.code.gson:gson:2.8.1'
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
compile 'com.github.bumptech.glide:glide:3.8.0'

权限

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

main布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.w.myapplication2.MainActivity">
<android.support.v7.widget.RecyclerView
    android:id="@+id/recy"
    android:layout_width="match_parent"
    android:layout_height="match_parent">android.support.v7.widget.RecyclerView>
RelativeLayout>

recyclerview适配器

public class MyAdapter extends RecyclerView.Adapter{
    private View view;
    private Context mcontext;
    private ArrayList mlist=new ArrayList<>();
    private OnItemClickListener mClickListener;

    public MyAdapter(Context mcontext, ArrayList list) {
        this.mcontext = mcontext;
        this.mlist=list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mcontext).inflate(R.layout.item, null);
        return new ViewHolder(view,mClickListener);

    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
        ViewHolder viewholder= (ViewHolder)holder;
        viewholder.textview.setText(""+mlist.get(position).getTitle());
        Glide.with(mcontext).load(getItem(position).getImages().get(0)).into(viewholder.ima);
        //只给标题设置的点击事件
     /*   viewholder.textview.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mcontext, mlist.get(position).getTitle(), Toast.LENGTH_SHORT).show();
            }
        });*/

    }
    //手写的重置数据的方法
    public void setdata(ArrayList list){
        if (list!=null&&list.size()>0){
            mlist.addAll(list);
        }

    }
    //手写的获得视图的方法
    public Bean.StoriesBean getItem(int position){
        return mlist.get(position);

    };

    @Override
    public int getItemCount() {
        return mlist.size();
    }
    //自定义的方法
    public void setOnItemClickListener(OnItemClickListener listener){
        this.mClickListener=listener;
    }
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
        private OnItemClickListener mListener;// 声明自定义的接口

        private TextView textview;
        private ImageView ima;
        //把定义的接口作为参数放到方法内
        public ViewHolder(View itemView,OnItemClickListener  listener) {
            super(itemView);

            mListener=listener;
            //给item设置点击事件
            itemView.setOnClickListener(this);

            textview=(TextView)itemView.findViewById(R.id.textView);
            ima=(ImageView)itemView.findViewById(R.id.imageView);
        }

        @Override
        public void onClick(View v) {
            // getpostion()为Viewholder自带的一个方法，用来获取RecyclerView当前的位置，将此作为参数，传出去
            mListener.onItemClick(v,getPosition());

        }
    }
    //手写的一个接口
    public interface OnItemClickListener {
        public void onItemClick(View view, int postion);
    }
}

okhttp工具类

//OKHttp工具类
public class OKHttp {
    public void getdata(String url, final MainActivity netDataCallback) {
        //初始化一个 OkHttpClient 并且设置连接和读取超时时间
        OkHttpClient okhttp = new OkHttpClient.Builder()
                .connectTimeout(10, TimeUnit.SECONDS)
                .readTimeout(20, TimeUnit.SECONDS)
                .build();
        //构造一个Request对象
        Request request = new Request.Builder().url(url).build();
        //通过request的对象去构造得到一个Call对象
        Call call=okhttp.newCall(request);
        //调用的是call.enqueue，将call加入调度队列，然后等待任务执行完成，我们在Callback中即可得到结果。
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                netDataCallback.err(500,e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String  s = response.body().string();
                netDataCallback.callback(s);
            }
        });
    }
    public interface NetDataCallback {
        void callback(String str);
        void err(int code,String s);
    }
}

recyclerview的布局管理器(不能忽视)

public class AppManager {

    // Activity栈
    private static Stack activityStack;
    // 单例模式
    private static AppManager instance;

    private AppManager() {
    }

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {
        if (instance == null) {
            instance = new AppManager();
        }
        return instance;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack();
        }
        activityStack.add(activity);
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        Activity activity = activityStack.lastElement();
        return activity;
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null) {
            activityStack.remove(activity);
            activity.finish();
            activity = null;
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                finishActivity(activity);
                break;
            }
        }
    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        for (int i = 0; i < activityStack.size(); i++) {
            if (null != activityStack.get(i)) {
                activityStack.get(i).finish();
            }
        }
        activityStack.clear();
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            //退出程序
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        } catch (Exception e) {
        }
    }
}

main代码

public class MainActivity extends AppCompatActivity {
    private RecyclerView mrv;
    private String url="https://news-at.zhihu.com/api/4/news/latest";
    private MyAdapter md;
    private OKHttp http;
    private ArrayList mlist=new ArrayList<>();
    public Handler hand=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what==1){
                Gson gson=new Gson();
                Bean bean = gson.fromJson(msg.obj.toString(), Bean.class);
                // mlist=(ArrayList) newsData.getData();
                mlist=(ArrayList) bean.getStories();
                md.setdata((ArrayList) mlist);
                md.notifyDataSetChanged();

            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mrv=(RecyclerView)findViewById(R.id.recy);
        initdata();
        mrv.setLayoutManager(new LinearLayoutManager(this));
        md=new MyAdapter(this,mlist);
        mrv.setAdapter(md);

        //RecyclerView条目的点击事件
        md.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int postion) {
                Toast.makeText(MainActivity.this, mlist.get(postion).getTitle(), Toast.LENGTH_SHORT).show();
            }
        });
    }
    private void initdata() {
        OKHttp http=new OKHttp();
        http.getdata(url, this);
    }
    public void callback(String str) {
        Message msg = Message.obtain();
        msg.what=1;
        msg.obj=str;
        hand.sendMessage(msg);

    }
    public void err(int code, String s) {

    }
}