Mytask:
package com.example.com.aa.Util; import android.os.AsyncTask; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; /** * Created by 聯想 on 2018/1/12. */ public class Mytask extends AsyncTask<String,Void,String>{ //申請接口類對象 private Icallbacks icallbacks; //將無參構造設置成私有的，是他在外部不能調用 private Mytask(){} //定義有參構造 public Mytask(Icallbacks icallbacks){ this.icallbacks=icallbacks; } @Override protected String doInBackground(String... strings) { String str=""; try { URL url = new URL(strings[0]); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.setReadTimeout(5000); urlConnection.setConnectTimeout(5000); if (urlConnection.getResponseCode()==200){ InputStream inputStream = urlConnection.getInputStream(); //調用工具類中的靜態方法 str=statemtostring.statemstr(inputStream,"utf-8"); }else if(urlConnection.getResponseCode()==301 ||urlConnection.getResponseCode()==302 ){ //拿到重定向的地址 String newUrl=urlConnection.getHeaderField("location"); URL u=new URL(newUrl); HttpURLConnection connection1=(HttpURLConnection) u.openConnection(); connection1.setRequestMethod("GET"); connection1.setReadTimeout(5000); connection1.setConnectTimeout(5000); if(connection1.getResponseCode()==200){ InputStream inputStream=connection1.getInputStream(); //調用工具類中的靜態方法 str=statemtostring.statemstr(inputStream,"utf-8"); } } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return str; } @Override protected void onPostExecute(String s) { super.onPostExecute(s); //解析，封裝到bean,更新ui組件 icallbacks.updateUiByjson(s); } //定義一個接口 public interface Icallbacks{ //根據回傳的jsoon串，解析並更新頁面組件 void updateUiByjson(String jsonstr); } }
statemtostring:
package com.example.com.aa.Util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; /** * Created by 聯想 on 2018/1/12. */ public class statemtostring { public static String statemstr(InputStream inputStream,String charSet){ StringBuilder builder = new StringBuilder(); try { BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, charSet)); String con; while((con=br.readLine())!=null){ builder.append(con); } br.close(); return builder.toString(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return ""; } }
mainActivity中；
package com.example.com.aa; import android.os.AsyncTask; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import android.widget.TextView; import com.example.com.aa.Adapter.MyAdapter; import com.example.com.aa.Bean.RequestdataBean; import com.example.com.aa.Util.Mytask; import com.google.gson.Gson; import java.util.List; /** * Created by 聯想 on 2018/1/11. */ public class Contentfragment extends Fragment { private View view; private TextView tview; private ListView lv; private String data; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { view = inflater.inflate(R.layout.connectfragment,container,false); tview = view.findViewById(R.id.tview); lv = view.findViewById(R.id.lv); Bundle arguments = getArguments(); data = arguments.getString("data"); getDatas(); return view; } public void getDatas() { Mytask mytask = new Mytask(new Mytask.Icallbacks() { @Override public void updateUiByjson(String jsonstr) { Gson gson = new Gson(); RequestdataBean requestdataBean = gson.fromJson(jsonstr, RequestdataBean.class); List<RequestdataBean.ResultBean.DataBean> data = requestdataBean.getResult().getData(); MyAdapter myAdapter = new MyAdapter(getActivity(),data); lv.setAdapter(myAdapter); } }); mytask.execute("http://v.juhe.cn/toutiao/index?type="+data+"&key=444da40ec8ee43818073d7131c2ffa8f"); } }
碎片：
package com.example.com.aa; import android.content.Intent; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.design.widget.TabLayout; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import java.util.ArrayList; import java.util.List; public class Fragment01 extends Fragment { private TextView dian; private View view; private ViewPager vp; private List<String> list; private TabLayout tabout; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { view = inflater.inflate(R.layout.activity_fragment01, container, false); dian = view.findViewById(R.id.dian); vp = view.findViewById(R.id.vp); tabout = view.findViewById(R.id.tabout); dian.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(getActivity(), secondsou.class); startActivity(intent); } }); listData(); vp.setAdapter(new MyAdapter(getChildFragmentManager())); tabout.setupWithViewPager(vp); return view; } private void listData() { list = new ArrayList<>(); list.add("推薦"); list.add("新時代"); list.add("熱點"); list.add("北京"); list.add("視頻"); list.add("圖片"); list.add("娛樂"); list.add("問答"); list.add("科技"); list.add("汽車"); list.add("財經"); list.add("軍事"); list.add("體育"); list.add("段子"); list.add("國際"); list.add("趣圖"); list.add("健康"); list.add("房產"); } class MyAdapter extends FragmentPagerAdapter { public MyAdapter(FragmentManager fm) { super(fm); } @Override public CharSequence getPageTitle(int position) { return list.get(position); } @Override public Fragment getItem(int position) { Contentfragment contentfragment = new Contentfragment(); Bundle bundle = new Bundle(); if (list.get(position).equals("推薦")){ bundle.putString("data", "top"); }else if(list.get(position).equals("新時代")){ bundle.putString("data","guoji"); } //傳值 contentfragment.setArguments(bundle); return contentfragment; } @Override public int getCount() { return list.size(); } } }
佈局文件：
<?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.example.com.aa.Fragment01"> <include layout="@layout/include"></include> <android.support.design.widget.TabLayout android:id="@+id/tabout" android:layout_width="match_parent" android:layout_height="40dp" android:layout_marginTop="73dp" app:tabGravity="center" app:tabIndicatorColor="#fff" app:tabMode="scrollable" app:tabSelectedTextColor="#f00" app:tabTextColor="@color/colorPrimary"></android.support.design.widget.TabLayout> <android.support.v4.view.ViewPager android:id="@+id/vp" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/tabout"></android.support.v4.view.ViewPager> </RelativeLayout>