Android obtains http request json data, androidjson

Android obtains http request json data, androidjson

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: % 22 getAllUser % 22 }";
Try {
// TextView. setText (getJsonContent (path ));
// String r = getJsonContent (path );
// Toast. makeText (MainActivity. this, r, 0). show ();
// Enable a sub-thread to perform network operations. Wait for a returned result and use handler to notify the 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 ();
}

}

/**
* Subthreads related to network operations
*/
Runnable networkTask = new Runnable (){

@ Override
Public void run (){
String path = "http: // 192.168.1.151: 10080 /? Module = {appId: % 22d1% 22, id: % 22 getAllUser % 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 (); // use the HttpURLConnection object to obtain webpage data from the network.
Conn. setConnectTimeout (5*1000); // The unit is milliseconds and the timeout value is set to 5 seconds.
Conn. setRequestMethod ("GET"); // HttpURLConnection requests the path through the HTTP protocol. Therefore, you need to set the request method. You can leave it unspecified because the default value is GET.
// Log. v ("abc", "Status:" + conn. getResponseCode ());

If (conn. getResponseCode () = 200) {// check whether the request code is 200; otherwise, the request fails.
InputStream is = conn. getInputStream (); // gets the input stream
Byte [] data = readStream (is); // converts the input stream to a character array
String json = new String (data); // converts a character array to a String


// Data format: {"total": 2, "success": true, "arrayData": [{"id": 1, "name": ""}, {"id": 2, "name": "kitten"}]}
JSONObject jsonObject = new JSONObject (json); // The returned data is of the Object type, so it can be directly converted into an Object.
// Int total = jsonObject. getInt ("total ");
Boolean success = jsonObject. getBoolean ("success ");
// Log. I ("abc", "total:" + total + "| success:" + success); // Test Data

JSONArray jsonArray = jsonObject. getJSONArray ("data"); // contains an array of data. You can use getJSONArray to obtain the array.
For (int I = 0; I <jsonArray. length (); I ++ ){
JSONObject item = jsonArray. getJSONObject (I); // obtain each object
Int id = item. getInt ("UserID"); // obtain the value of the object
String name = item. getString ("UserName ");

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

******************

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
*: Parameter
* @ Return result
*/
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 ");
// Enter 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