activity_xml布局
<?xml version="1.0" encoding="utf-8"?><LinearLayout
android:layout_width="match_parent"
android:background="#aaa"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_height="wrap_content">
<ImageView
android:src="@drawable/fan"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TextView
android:layout_weight="10"
android:layout_width="0dp"
android:text="今日头条"
android:gravity="center"
android:layout_height="wrap_content" />
<ImageView
android:src="@drawable/mo"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_news"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
HttpUtils页面
package bw.com.a1117moni.utils;
import android.os.Handler;
import com.google.gson.Gson;
import java.io.IOException;
import java.lang.reflect.Type;
import bw.com.a1117moni.callback.ICallBack;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
/**
- Created by lenovo on 2018-11-17.
*/
public class HttpUtils {
private static volatile HttpUtils instance;
private OkHttpClient client;
private Handler handler = new Handler();
private HttpUtils(){
client=new OkHttpClient();
}
public static HttpUtils getInstance(){
if (instance == null){
synchronized (HttpUtils.class){
if (null == instance){
instance = new HttpUtils();
}
}
}
return instance;
}
public void get(String url, final ICallBack callBack, final Type type){
Request request = new Request.Builder()
.url(url)
.get()
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
callBack.onFailed(e);
}
});
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
Gson gson = new Gson();
final Object o = gson.fromJson(string, type);
handler.post(new Runnable() {
@Override
public void run() {
callBack.onSuccess(o);
}
});
}
});
}
}
IView页面
package bw.com.a1117moni.frist.view;
import java.util.List;
import bw.com.a1117moni.bean.News;
/**
- Created by lenovo on 2018-11-17.
*/
public interface IView {
void onSuccess(List<News.DataBean> list);
void onFailed(Exception e);
}
NewsPresenter页面
package bw.com.a1117moni.frist.presenter;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import bw.com.a1117moni.bean.News;
import bw.com.a1117moni.callback.ICallBack;
import bw.com.a1117moni.frist.model.NewsModel;
import bw.com.a1117moni.frist.view.IView;
/**
- Created by lenovo on 2018-11-17.
*/
public class NewsPresenter {
private IView iv;
private NewsModel newsModel;
public void attach(IView iv) {
this.iv = iv;
newsModel = new NewsModel();
}
public void get(){
Type type = new TypeToken<News>(){}.getType();
newsModel.getNews("http://www.xieast.com/api/news/news.php", new ICallBack() {
@Override
public void onSuccess(Object o) {
News newsBean = (News) o;
if (newsBean != null){
iv.onSuccess(newsBean.getData());
}
}
@Override
public void onFailed(Exception e) {
iv.onFailed(e);
}
},type);
}
}
NewsModel页面
package bw.com.a1117moni.frist.model;
import java.lang.reflect.Type;
import bw.com.a1117moni.callback.ICallBack;
import bw.com.a1117moni.utils.HttpUtils;
/**
- Created by lenovo on 2018-11-17.
*/
public class NewsModel {
public void getNews(String url, ICallBack callBack, Type type){
HttpUtils.getInstance().get(url,callBack,type);
}
}
ICallBack页面
package bw.com.a1117moni.callback;
/**
- Created by lenovo on 2018-11-17.
*/
public interface ICallBack {
void onSuccess(Object o);
void onFailed(Exception e);
}
NewsAdapter页面
package bw.com.a1117moni.adapter;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import java.util.List;
import bw.com.a1117moni.R;
import bw.com.a1117moni.bean.News;
/**
- Created by lenovo on 2018-11-17.
*/
public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder>{
private Context context;
private List<News.DataBean> list;
public NewsAdapter(Context context, List<News.DataBean> list) {
this.context = context;
this.list = list;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v=View.inflate(context, R.layout.news_item,null);
ViewHolder holder=new ViewHolder(v);
return holder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Glide.with(context).load(list.get(position).getThumbnail_pic_s()).into(holder.imgNews);
holder.txtNews.setText(list.get(position).getTitle());
}
@Override
public int getItemCount() {
return list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private ImageView imgNews;
private TextView txtNews;
public ViewHolder(View itemView) {
super(itemView);
imgNews = itemView.findViewById(R.id.img);
txtNews = itemView.findViewById(R.id.title);
}
}
}
MainActivity页面
package bw.com.a1117moni;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import bw.com.a1117moni.adapter.NewsAdapter;
import bw.com.a1117moni.bean.News;
import bw.com.a1117moni.frist.presenter.NewsPresenter;
import bw.com.a1117moni.frist.view.IView;
public class MainActivity extends AppCompatActivity implements IView{
private RecyclerView rvNews;
private NewsAdapter adapter;
private List<News.DataBean> listBeans;
private NewsPresenter presenter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rvNews=findViewById(R.id.rv_news);
RecyclerView.LayoutManager manager = new LinearLayoutManager(this);
rvNews.setLayoutManager(manager);
listBeans = new ArrayList<>();
adapter = new NewsAdapter(this,listBeans);
rvNews.setAdapter(adapter);
presenter = new NewsPresenter();
presenter.attach(this);
presenter.get();
}
@Override
public void onSuccess(List<News.DataBean> list) {
if (list != null){
listBeans.clear();
listBeans.addAll(list);
adapter.notifyDataSetChanged();
}
}
@Override
public void onFailed(Exception e) {
Toast.makeText(this,"网络连接错误",Toast.LENGTH_LONG).show();
}
}
new_item页面
<?xml version="1.0" encoding="utf-8"?>