聚合数据提供了新闻数据的接口,需要在https://www.juhe.cn/这个网址上面进行注册,获取API。
资料参考:解析聚合新闻数据,并显示到主界面上(简易新闻 二)_Tobey_r1的博客-CSDN博客
效果展示:
代码:
newsbean
package com.example.frametest.json; import java.util.List; public class NewsBean { private String reason; private ResultBean result; private int error_code; public String getReason() { return reason; } public void setReason(String reason) { this.reason = reason; } public ResultBean getResult() { return result; } public void setResult(ResultBean result) { this.result = result; } public int getError_code() { return error_code; } public void setError_code(int error_code) { this.error_code = error_code; } public static class ResultBean { private String stat; private List<DataBean> data; public String getStat() { return stat; } public void setStat(String stat) { this.stat = stat; } public List<DataBean> getData() { return data; } public void setData(List<DataBean> data) { this.data = data; } public static class DataBean { private String uniquekey; private String title; private String date; private String category; private String author_name; private String url; private String thumbnail_pic_s; private String thumbnail_pic_s02; private String thumbnail_pic_s03; public String getUniquekey() { return uniquekey; } public void setUniquekey(String uniquekey) { this.uniquekey = uniquekey; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDate() { return date; } public void setDate(String date) { this.date = date; } public String getCategory() { return category; } public void setCategory(String category) { this.category = category; } public String getAuthor_name() { return author_name; } public void setAuthor_name(String author_name) { this.author_name = author_name; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getThumbnail_pic_s() { return thumbnail_pic_s; } public void setThumbnail_pic_s(String thumbnail_pic_s) { this.thumbnail_pic_s = thumbnail_pic_s; } public String getThumbnail_pic_s02() { return thumbnail_pic_s02; } public void setThumbnail_pic_s02(String thumbnail_pic_s02) { this.thumbnail_pic_s02 = thumbnail_pic_s02; } public String getThumbnail_pic_s03() { return thumbnail_pic_s03; } public void setThumbnail_pic_s03(String thumbnail_pic_s03) { this.thumbnail_pic_s03 = thumbnail_pic_s03; } } } }
list_item.xml
<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipe_refresh" android:layout_width="match_parent" android:layout_height="match_parent"> <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="match_parent" android:scrollbars="none"> </ListView> </android.support.v4.widget.SwipeRefreshLayout> <android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|end" android:layout_margin="16dp" android:src="@drawable/ic_vertical_align_top" app:elevation="8dp" /> </FrameLayout> </android.support.design.widget.CoordinatorLayout>
newsfragment
package com.example.frametest; import android.annotation.SuppressLint; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.design.widget.FloatingActionButton; import android.support.v4.app.Fragment; import android.support.v4.widget.SwipeRefreshLayout; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ListView; import android.widget.TextView; import com.example.frametest.json.NewsBean; import com.example.frametest.TabAdapter.MyTabAdapter; import com.google.gson.Gson; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.util.List; public class NewsFragment extends Fragment { private FloatingActionButton fab; private ListView listView; private SwipeRefreshLayout swipeRefreshLayout; private List<NewsBean.ResultBean.DataBean> list; private static final int UPNEWS_INSERT = 0; @SuppressLint("HandlerLeak") private Handler newsHandler = new Handler(){ @Override public void handleMessage(Message msg) { String uniquekey,title,date, category,author_name,url,thumbnail_pic_s,thumbnail_pic_s02,thumbnail_pic_s03; switch (msg.what){ case UPNEWS_INSERT: list = ((NewsBean) msg.obj).getResult().getData(); MyTabAdapter adapter = new MyTabAdapter(getActivity(),list); listView.setAdapter(adapter); adapter.notifyDataSetChanged(); break; } } }; @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.list_item,container,false); listView = (ListView) view.findViewById(R.id.listView); fab = (FloatingActionButton) view.findViewById(R.id.fab); swipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_refresh); return view; } @SuppressLint("HandlerLeak") @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); onAttach(getActivity()); //获取传递的值 Bundle bundle = getArguments(); final String data = bundle.getString("name","top"); //置顶功能 fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { listView.smoothScrollToPosition(0); } }); //下拉刷新 swipeRefreshLayout.setColorSchemeResources(R.color.colorRed); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { new Handler().postDelayed(new Runnable() { @Override public void run() { swipeRefreshLayout.setRefreshing(false); // 下一步实现从数据库中读取数据刷新到listview适配器中 } },1000); } }); //异步加载数据 getDataFromNet(data); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //获取点击条目的路径,传值显示webview页面 String url = list.get(position).getUrl(); String uniquekey = list.get(position).getUniquekey(); final NewsBean.ResultBean.DataBean dataBean = (NewsBean.ResultBean.DataBean) list.get(position); Intent intent = new Intent(getActivity(),WebActivity.class); intent.putExtra("url",url); startActivity(intent); } }); } private void getDataFromNet(final String data){ @SuppressLint("StaticFieldLeak") AsyncTask<Void,Void,String> task = new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String path = "http://v.juhe.cn/toutiao/index?type="+data+"&key=547ee75ef186fc55a8f015e38dcfdb9a"; URL url = null; try { url = new URL(path); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setReadTimeout(5000); connection.setConnectTimeout(5000); int responseCode = connection.getResponseCode(); if (responseCode == 200){ InputStream inputStream = connection.getInputStream(); String json = streamToString(inputStream,"utf-8"); return json; } else { System.out.println(responseCode); return "已达到今日访问次数上限"; } } catch (MalformedURLException e) { e.printStackTrace(); } catch (ProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return ""; } protected void onPostExecute(final String result){ new Thread(new Runnable() { @Override public void run() { NewsBean newsBean = new Gson().fromJson(result,NewsBean.class); System.out.println(newsBean.getError_code()); if ("10012".equals(""+newsBean.getError_code())){ //下一篇将要实现从数据库加载数据 } Message msg=newsHandler.obtainMessage(); msg.what=UPNEWS_INSERT; msg.obj = newsBean; newsHandler.sendMessage(msg); } }).start(); } @Override protected void onProgressUpdate(Void... values) { super.onProgressUpdate(values); } }; task.execute(); } private String streamToString(InputStream inputStream, String charset){ try { InputStreamReader inputStreamReader = new InputStreamReader(inputStream,charset); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String s = null; StringBuilder builder = new StringBuilder(); while ((s = bufferedReader.readLine()) != null){ builder.append(s); } bufferedReader.close(); return builder.toString(); } catch (IOException e) { e.printStackTrace(); } return null; } }
添加适配器
package com.example.frametest.TabAdapter; import android.content.Context; import android.graphics.Bitmap; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.example.frametest.R; import com.example.frametest.json.NewsBean; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; import com.nostra13.universalimageloader.core.assist.ImageScaleType; import java.util.List; public class MyTabAdapter extends BaseAdapter { private List<NewsBean.ResultBean.DataBean> list; private Context context; private int IMAGE_01 =0; private int IMAGE_02 = 1; private int IMAGE_03 = 2; public MyTabAdapter(Context context, List<NewsBean.ResultBean.DataBean> list){ this.context = context; this.list = list; //配置lmageloader类 ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(context)); } @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return list.get(position); } @Override public long getItemId(int position) { return position; } @Override public int getViewTypeCount() { return 3; } @Override public int getItemViewType(int position) { if (list.get(position).getThumbnail_pic_s() != null && list.get(position).getThumbnail_pic_s02() !=null && list.get(position).getThumbnail_pic_s03() !=null){ return IMAGE_03; }else if (list.get(position).getThumbnail_pic_s() !=null && list.get(position).getThumbnail_pic_s02() !=null){ return IMAGE_02; } return IMAGE_01; } @Override public View getView(int position, View convertView, ViewGroup parent) { if (getItemViewType(position) == IMAGE_01){ Image01_ViewHolder holder; if (convertView == null){ convertView =View.inflate(context, R.layout.item_layout01,null); holder =new Image01_ViewHolder(); //查找控件 holder.author_name = (TextView) convertView.findViewById(R.id.author_name); holder.title = (TextView) convertView.findViewById(R.id.title); holder.image = (ImageView) convertView.findViewById(R.id.image); convertView.setTag(holder); }else { holder = (Image01_ViewHolder) convertView.getTag(); } //获取数据重新赋值 holder.title.setText(list.get(position).getTitle()); holder.author_name.setText(list.get(position).getAuthor_name()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.image,getOption()); }else if (getItemViewType(position) == IMAGE_02){ Image02_ViewHolder holder; if (convertView == null){ convertView =View.inflate(context, R.layout.item_layout02,null); holder =new Image02_ViewHolder(); //查找控件 holder.image002 = (ImageView) convertView.findViewById(R.id.image002); holder.image001 = (ImageView) convertView.findViewById(R.id.image001); holder.title = (TextView) convertView.findViewById(R.id.title); convertView.setTag(holder); }else { holder = (Image02_ViewHolder) convertView.getTag(); } //获取数据重新赋值 holder.title.setText(list.get(position).getTitle()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.image001,getOption()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s02(),holder.image002,getOption()); } else { Image03_ViewHolder holder; if (convertView == null){ convertView =View.inflate(context, R.layout.item_layout03,null); holder =new Image03_ViewHolder(); //查找控件 holder.image01 = (ImageView) convertView.findViewById(R.id.image01); holder.image02 = (ImageView) convertView.findViewById(R.id.image02); holder.image03 = (ImageView) convertView.findViewById(R.id.image03); holder.title = (TextView) convertView.findViewById(R.id.title); convertView.setTag(holder); }else { holder = (Image03_ViewHolder) convertView.getTag(); } //获取数据重新赋值 holder.title.setText(list.get(position).getTitle()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.image01,getOption()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s02(),holder.image02,getOption()); ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s03(),holder.image03,getOption()); } return convertView; } //配置图片加载失败和加载中显示的Android小机器人logo public static DisplayImageOptions getOption() { DisplayImageOptions options = new DisplayImageOptions.Builder() .showImageOnLoading(R.mipmap.ic_launcher) // 设置图片下载期间显示的图片 .showImageForEmptyUri(R.mipmap.ic_launcher) // 设置图片Uri为空或是错误的时候显示的图片 .showImageOnFail(R.mipmap.ic_launcher) // 设置图片加载或解码过程中发生错误显示的图片 .resetViewBeforeLoading(true) // default 设置图片在加载前是否重置、复位 .delayBeforeLoading(1000) // 下载前的延迟时间 .cacheInMemory(true) // default 设置下载的图片是否缓存在内存中 .cacheOnDisk(true) // default 设置下载的图片是否缓存在SD卡中 .imageScaleType(ImageScaleType.EXACTLY_STRETCHED) // default 设置图片以如何的编码方式显示 .bitmapConfig(Bitmap.Config.RGB_565) // default 设置图片的解码类型 .build(); return options; } static class Image01_ViewHolder{ TextView title,author_name; ImageView image; } static class Image02_ViewHolder{ TextView title; ImageView image001,image002; } static class Image03_ViewHolder{ TextView title; ImageView image01,image02,image03; } }