Android gets HTTP request JSON data

Package com.my.gethttpjsondata;

Import Java.io.BufferedReader;
Import Java.io.ByteArrayOutputStream;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import java.net.HttpURLConnection;
Import Java.net.URL;
Import java.util.ArrayList;
Import Java.util.HashMap;
Import java.util.List;
Import Java.util.Map;
Import Org.json.JSONArray;
Import Org.json.JSONObject;
Import Android.os.Bundle;
Import android.app.Activity;
Import Android.content.Context;
Import Android.util.Log;
Import Android.view.View;
Import Android.widget.TextView;
Import Android.widget.Toast;

public class Mainactivity extends Activity {

TextView TextView;

static String err;

@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);

TextView = (TextView) Findviewbyid (R.id.tv_json);

}

public void Click1 (view view)
{
Toast.maketext (Mainactivity.this, "start", 0). Show ();
String path= "Http://192.168.1.151:10080/?module={appid:%22d1%22,id:%22getalluser%22}";
try {
Textview.settext (getjsoncontent (path));
String r=getjsoncontent (path);
Toast.maketext (Mainactivity.this, R, 0). Show ();
Open a sub-thread for network operation, wait for return result, use handler to notify UI
New Thread (Networktask). Start ();

/**
List<map> list=new arraylist<map> ();
List=getjsonobject (Path,mainactivity.this);
for (Map list2:list) {
String id = list2.get ("UserID"). ToString ();
String name = List2.get ("UserName"). ToString ();
Toast.maketext (Mainactivity.this, "ID:" + id + "| Name: "+ Name, 0)." Show ();
}
**/

} catch (Exception e) {
Toast.maketext (Mainactivity.this, e.tostring (), 0). Show ();
E.printstacktrace ();
}

}

/**
* Network operation related sub-threads
*/
Runnable networktask = new Runnable () {

@Override
public void Run () {
String path= "Http://192.168.1.151:10080/?module={appid:%22d1%22,id:%22getalluser%22}";
List<map> list=new arraylist<map> ();
try {
List=getjsonobject (path);
} catch (Exception e) {

E.printstacktrace ();
}
for (Map list2:list) {
String id = list2.get ("UserID"). ToString ();
String name = List2.get ("UserName"). ToString ();
LOG.V ("Data", "ID:" + id + "| Name: "+ name");
}
}
};

public static list<map> Getjsonobject (String path) throws Exception {
list<map> list = new arraylist<map> ();
Map map = null;
URL url = new URL (path);
HttpURLConnection conn = (httpurlconnection) url.openconnection ();//using the HttpURLConnection object, we can get the Web page data from the network.
Conn.setconnecttimeout (5 * 1000); Unit is milliseconds, setting timeout is 5 seconds
Conn.setrequestmethod ("GET"); The httpurlconnection is requesting path paths through the HTTP protocol, so you need to set the request mode, not set because the default is get
LOG.V ("abc", "Status:" +conn.getresponsecode ());

if (conn.getresponsecode () = = 200) {//Determine if the request code is 200 yards, otherwise failed
InputStream is = Conn.getinputstream (); Get input stream
byte[] data = Readstream (IS); Convert input flow to character array
String json = new string (data); Converts a character array to a string


Data form: {"Total": 2, "Success": true, "Arraydata": [{"id": 1, "name": "Piglet"},{"id": 2, "name": "Kitten"}]}
Jsonobject jsonobject=new Jsonobject (JSON); The returned data form is an object type, so it can be converted directly to an object
int Total=jsonobject.getint ("total");
Boolean Success=jsonobject.getboolean ("Success");
LOG.I ("abc", "Total:" + All + "| Success: "+ success); Test data

Jsonarray Jsonarray = Jsonobject.getjsonarray ("data");//There is an array of data in it, you can get the array with Getjsonarray
for (int i = 0; i < jsonarray.length (); i++) {
Jsonobject item = jsonarray.getjsonobject (i); Get each object
int id = item.getint ("UserID"); Gets the value corresponding to the object
String name = item.getstring ("UserName");

Map = new HashMap (); Store in Map
Map.put ("UserID", id + "");
Map.put ("UserName", name);
List.add (map);
}
}

Test Data ******************

for (Map list2:list) {
String id = list2.get ("UserID"). ToString ();
String name = List2.get ("UserName"). ToString ();
LOG.V ("Data", "ID:" + id + "| Name: "+ name");
}

return list;
}


public static byte[] Readstream (InputStream inputstream) throws Exception {
Bytearrayoutputstream bout = new Bytearrayoutputstream ();
byte[] buffer = new byte[1024];
int len = 0;
while (len = inputstream.read (buffer))! =-1) {
Bout.write (buffer, 0, Len);
}
Bout.close ();
Inputstream.close ();

return Bout.tobytearray ();
}



public void Click2 (view view)
{
Thread Th=new Thread (new Runnable () {

@Override
public void Run () {
TODO auto-generated Method Stub
String Httpurl = "Http://apis.baidu.com/heweather/weather/free";
String Httparg = "city=beijing";
String Jsonresult = Request (Httpurl, httparg);
LOG.V ("Jsonresult", Jsonresult);
Toast.maketext (mainactivity.this, Jsonresult, 0). Show ();
}
});

Th.start ();

}

/**
* @param urlall
*: Request Interface
* @param httparg
*: Parameters
* @return Return results
*/
public static string request (String Httpurl, String httparg) {
BufferedReader reader = null;
String result = null;
StringBuffer SBF = new StringBuffer ();
Httpurl = Httpurl + "?" + Httparg;

try {
URL url = new URL (httpurl);
HttpURLConnection connection = (httpurlconnection) URL
. OpenConnection ();
Connection.setrequestmethod ("GET");
Fill in Apikey to HTTP header
Connection.setrequestproperty ("Apikey", "574cc9baa2b89769d89a6799c194f806");
Connection.connect ();
InputStream is = Connection.getinputstream ();
reader = new BufferedReader (new InputStreamReader (IS, "UTF-8"));
String strread = null;
while ((Strread = Reader.readline ()) = null) {
Sbf.append (Strread);
Sbf.append ("\ r \ n");
}
Reader.close ();
result = Sbf.tostring ();
} catch (Exception e) {
LOG.V ("Dituerr", e.tostring ());
E.printstacktrace ();

}
return result;
}

}

: Http://files.cnblogs.com/files/qujian15/GetHttpJsonData.rar

Android gets HTTP request JSON data