android--Baidu apistore+json--Get news Channel + news data

android--Baidu apistore+json--Get news Channel + news data

<span style= "FONT-SIZE:18PX;" ><strong>package Com.example.jreduch08.util;import Android.content.context;import android.os.Environment ; Import Java.io.file;import Java.io.filenotfoundexception;import Java.io.fileoutputstream;import Java.io.ioexception;public class Fileuitlity {private static String root_cache;private static fileuitlity instance = NULL  ;p rivate fileuitlity () {}public static fileuitlity getinstance (Context context,string root_dir) {if (instance = = null) {if (Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {Root_cache = (environment.getexternalstoragedirectory () + "/" + Root_dir + "/");} else {Root_cache = (Context.getfilesdir (). GetAbsolutePath () + "/" +root_dir+ "/");} File dir = new file (Root_cache), if (!dir.exists ()) {dir.mkdirs ();} Instance = new Fileuitlity ();} return instance;} Public file MakeDir (String dir) {File filedir = new File (Root_cache + dir); if (Filedir.exists ()) {return filedir;} else {F Iledir.mkdirs (); return filedir;}} Public StAtic string Savefiletosdcard (string filename,string content) {string state = Environment.getexternalstoragestate (); if ( !state.equals (environment.media_mounted)) {return ' SD card not ready ';} File root = Environment.getexternalstoragedirectory (); FileOutputStream fos = null;try {fos = new FileOutputStream (root+ "/" +filename); Fos.write (Content.getbytes ()); return " OK ";} catch (FileNotFoundException e) {e.printstacktrace ();} catch (IOException e) {e.printstacktrace ();} finally {if (fos!= NULL) {try {fos.close ();} catch (IOException e) {e.printstacktrace ()}}} Return "";}} </strong></span>

Package Com.example.jreduch08.util;import Android.util.log;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.url;/** * Created by the peak of cupola on 2016/8/17.        */public class Httputil {public static string HttpGet (String uri) {httpurlconnection con = null;//in order to throw an exception        InputStream is = null;        BufferedReader Reader=null;        String Result=null;        StringBuffer sbf=new StringBuffer ();            try {URL url = new URL (URI);            Con = (httpurlconnection) url.openconnection ();            Con.setrequestproperty ("Apikey", "5B46143955A4B1FF1B470A94315625CD");            Con.setconnecttimeout (5 * 1000);            Con.setreadtimeout (5 * 1000);                HTTP response code 200 succeeded 404 Not found 500 An error occurred if (con.getresponsecode () = =) {is = Con.getinputstream (); Reader =new BufferedReader (New InputStreamReader (IS, "UTF-8"));                String Strread=null;                    while ((Strread = Reader.readline ())!=null) {sbf.append (strread);                    Sbf.append ("\ r \ n");                LOG.D ("==j==", "200");                } reader.close ();                Result=sbf.tostring ();            LOG.D ("=====", result);        }} catch (Malformedurlexception e) {e.printstacktrace ();        } catch (IOException e) {e.printstacktrace ();                } finally {if (is = null) {try {is.close ();                } catch (IOException e) {e.printstacktrace ();            }}if (Con! = null) {con.disconnect ();    }} return result; }    }

Package com.example.jreduch08.util;/** * Created by the peak of cupola on 2016/8/17. */public class Urlutil {    //Get channel's network interface public    static String Channelurl = "Http://apis.baidu.com/showapi_open_bus /channel_news/channel_news ";    /* Get the channel corresponding news network interface      GET request parameters:       channelid    : News Channel ID, must be exact match       ChannelName  : News channel name, can blur match       title        : News title, Fuzzy matching       page         : page number, default 1. Up to 20 records per page       needcontent  : Whether you need to return the body, 1 is required       needhtml     : Whether you need to return the body HTML format, 1 is required     *    /Public static String Newsurl = "Http://apis.baidu.com/showapi_open_bus/channel_news/search_news";}

Above are three tools + methods

Package Com.example.jreduch08;import Android.os.asynctask;import Android.os.bundle;import Android.support.v7.app.appcompatactivity;import Android.view.view;import Android.widget.adapterview;import Android.widget.simpleadapter;import Android.widget.spinner;import Android.widget.textview;import Android.widget.toast;import Com.example.jreduch08.util.httputil;import Com.example.jreduch08.util.urlutil;import Org.json.jsonarray;import Org.json.jsonexception;import Org.json.jsonobject;import Java.util.ArrayList;import Java.util.hashmap;import Java.util.list;import Java.util.map;public class Httpjsonactivity extends AppCompatActivity    {Private String Httpurl;    Private TextView TV;    Private Spinner channe1;    Private Simpleadapter sa;    Private list<map<string,string>> channe1list;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_http_json); tv= (TextView) findviewbyiD (r.id.tv);        channe1= (Spinner) Findviewbyid (R.ID.CHANNE1);        Channe1list=new arraylist<> (); Sa=new Simpleadapter (this,channe1list,android. R.layout.simple_spinner_item, new string[]{"name"},new int[]{android.        R.ID.TEXT1});        Channe1.setadapter (SA);        New Getchanel (). Execute (); Channe1.setonitemselectedlistener (New Adapterview.onitemselectedlistener () {@Override public void O Nitemselected (adapterview<?> Parent, view view, int position, long id) {map<string,string> Map                =channe1list.get (position);                String channelname=map.get ("name");                String Channelid=map.get (ChannelName);                        String url=urlutil.newsurl+ "? channelid=" +channelid + "&channerlname=" +channelname               + "&needcontent=1" + "&needhtml=1"; New Getnew (). Execute (URL);//Tv.settext (channe1.GetSelectedItem (). toString ());//Toast.maketext (Getbasecontext (), "clicked News" +position,toast.length_short). Show ()               ;            Toast.maketext (Getbasecontext (), Channe1.getselecteditemid () + "", Toast.length_short). Show ();    } @Override public void onnothingselected (adapterview<?> parent) {}}); }//get Channel public class Getchanel extends asynctask<void,void,string>{@Override protected String DoI        Nbackground (Void ... strings) {return httputil.httpget (Urlutil.channelurl);     } @Override protected void OnPostExecute (String s) {Super.onpostexecute (s);     if (S.equals (")") {Toast.maketext (Getbasecontext (), "No Data", Toast.length_short). Show ();                } try {Jsonobject obj=new jsonobject (s);                Jsonobject body=obj.getjsonobject ("Showapi_res_body");          Jsonarray Ja=body.getjsonarray ("channellist");      for (int i=0;i<ja.length (); i++) {Jsonobject channelobj= (jsonobject) ja.get (i);                    String id=channelobj.getstring ("Channelid");                    String name=channelobj.getstring ("name");                    Map map=new HashMap ();                    Map.put ("name", name);                    Map.put (Name,id);                Channe1list.add (map);            } sa.notifydatasetchanged ();            } catch (Jsonexception e) {e.printstacktrace (); }}}//get news public class Getnew extends asynctask<string,void,string>{@Override protected Strin    G Doinbackground (String ... strings) {return Httputil.httpget (strings[0]);        } @Override protected void OnPostExecute (String s) {Super.onpostexecute (s);        if (S.equals ("")) {Tv.settext ("no data");    }else{Tv.settext (s);} }}}

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    xmlns:tools=" Http://schemas.android.com/tools "    android:layout_width=" Match_parent    " android:layout_height= "Match_parent"    tools:context= "com.example.jreduch08.HttpJsonActivity" ><spinner    android:layout_width= "match_parent"    android:layout_height= "wrap_content"    android:id= "@+id/channe1 "    ></Spinner>    <scrollview        android:layout_width=" match_parent "        android:layout_ height= "Wrap_content"        android:layout_below= "@+id/channe1"        >        <textview            android:layout _width= "Match_parent"            android:layout_height= "wrap_content"            android:id= "@+id/tv"            />    < /scrollview></relativelayout>

<span style= "FONT-SIZE:18PX;" ><strong>package Com.example.jreduch08;import Android.os.asynctask;import Android.os.Bundle;import Android.support.v7.app.appcompatactivity;import Android.util.log;import Android.widget.textview;import Android.widget.toast;import Com.example.jreduch08.util.fileuitlity;import Com.example.jreduch08.util.HttpUtil; Import Com.example.jreduch08.util.urlutil;public class Apiactivity extends Appcompatactivity {private String Httpurl    ;    Private TextView TV;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.LAYOUT.ACTIVITY_API);        tv= (TextView) Findviewbyid (r.id.tv);        Httpurl= "Http://apis.baidu.com/showapi_open_bus/channel_news/channel_news";    New Mygetjson (). Execute (urlutil.channelurl);        }//Access network Asynchronous task class public class Mygetjson extends asynctask<string,void,string> {//OnPostExecute execute command in main thread    Doinbackground executing commands in a child thread    Doinbackground executes to OnPostExecute @Override protected string Doinbackground (String ... params) {        Return Httputil.httpget (Params[0]); }//httpurlconnection con = null;//in order to throw exceptions//InputStream is = null;//BufferedReader reader                =null;//String result=null;//stringbuffer sbf=new stringbuffer ();////try {// URL url = new URL (httpurl);//con = (httpurlconnection) url.openconnection ();//con.se                Trequestproperty ("Apikey", "5B46143955A4B1FF1B470A94315625CD");//Con.setconnecttimeout (5 * 1000);// Con.setreadtimeout (5 * +);////http Response code 200 success 404 Not Found 500 error occurred//if (con.getresponsec Ode () = = +) {//is = Con.getinputstream ();//Reader =new BufferedReader (new InputS Treamreader (IS, "UTF-8"));//String strread=null;//while ((Strread = Reader.readline ())!=null) {//Sbf.append (Strread);//Sbf.append ("\                    r\n ");//LOG.D (" ==j== "," a ");//}//reader.close ();// Result=sbf.tostring ();//LOG.D ("=====", result);//}//} catch ( Malformedurlexception e) {//E.printstacktrace ();/} catch (IOException e) {//E                        . Printstacktrace ();/} finally {//if (is = null) {//try {//                    Is.close ();//} catch (IOException e) {//E.printstacktrace ();//            }//}if (con! = null) {//Con.disconnect ();//}// }//return result;//} @Override protected void OnPostExecute (String s) {sup    Er.onpostexecute (s);        Tv.settext (s);            SaveFile (s);        LOG.D ("==j==", "2"); }}//save file to sd card public void SaveFile (String s) {Toast.maketext (This, Fileuitlity.savefiletosdcard ("/abcde    F.txt ", s), Toast.length_short). Show ();        }//FileOutputStream fos=null;////Get SD card status//String state= environment.getexternalstoragestate ();// Determine if the SD card is ready//if (!state.equals (environment.media_mounted)) {//Toast.maketext (this, "Please check SD card", TOAST.L Ength_short). Show ();//return;//}////Get SD Card root directory//File file= Environment.getexternalstorag EDirectory ();////try {//LOG.D ("=====SD card root:", File.getcanonicalpath (). toString ());////file Myfile=new File (File.getcanonicalpath () + "/sd.txt")////fos=new FileOutputStream (myFile);////////output stream construction The parameter 1 can be a file object or a path to the files////////////output stream construction parameter 2: Default is false=> overlay content; ture= append///Append, ture//Fos=ne W FileOutputStream (File.getcanonicalpath () + "/sdsdsd.txt");//String str=s;//Fos.write (Str.getbytes ());//T Oast.maketext (This, "Save succeeded", Toast.length_short). Show ();/} catch (IOException e) {//E.printstacktrace ();                }finally {//if (fos!=null) {//try {//Fos.close ();// } catch (IOException e) {//E.printstacktrace ();//}//}//}//}} </strong></span>

android--Baidu apistore+json--Get news Channel + news data