Android, HttpURLConnection

*** implementation


new Thread(new Runnable() {
public void run() {
    HashMap params = new HashMap();      
    params.put("param1", "1");
    HttpURLConnection connection = null;      
    try {
        URL url = new URL("http://xxxxx.com/api/xxxx");           

        connection = (HttpURLConnection)url.openConnection();
        connection.setRequestMethod("POST");

        connection.setRequestProperty("Accept", "application/json");
        connection = ConnectionManager.setParams(connection, params);
            connection.connect();
            Integer responseCode  = connection.getResponseCode();

            if (responseCode == HttpURLConnection.HTTP_OK) {

            activity.runOnUiThread(new Runnable(){
                @Override
                public void run() {
                    //refresh GUI
                }
                    });
            }
        }catch(Exception e){
        e.printStackTrace();  
    }finally{
            if(connection != null){
                    connection.disconnect();      
        }

        }
}
}).start();




*** set Parameter



public static HttpURLConnection setParams(HttpURLConnection conn,
            HashMap<String, String> params) throws Exception{

    Uri.Builder builder = new Uri.Builder();

    for (String key : params.keySet()) {
        builder.appendQueryParameter(key, params.get(key));   
    }
    String query = builder.build().getEncodedQuery();
    OutputStream os = conn.getOutputStream();

    BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(os, "UTF-8"));

    writer.write(query);   
    writer.flush();
    writer.close();
    os.close();   
    return conn;

}