Question

I have database like which have three coloums( id(integer) , startdate(text), enddate(text),).
I want to read all the entries for these coloums, convert them to Json and send to web url.
I know how read values but did not know how to make Json from these values.
Please any coding help…

Answer 1

Why don’t you try:
`

JSONObject object = new JSONObject();
    try {
        object.put("id", id);
        object.put("startDate", startDate);
        object.put("endDate", endDate);
    } catch (JSONException e) {
        e.printStackTrace();
    }`

Then send the json object via a http post
`

HttpClient hc = new DefaultHttpClient();
        String message;

        HttpPost p = new HttpPost(url);    
 try {
        message = object.toString();


        p.setEntity(new StringEntity(message, "UTF8"));
        p.setHeader("Content-type", "application/json");
            HttpResponse resp = hc.execute(p);
            if (resp != null) {
                if (resp.getStatusLine().getStatusCode() == 204)
                    result = true;
            }

            Log.d("Status line", "" + resp.getStatusLine().getStatusCode());
        } catch (Exception e) {
            e.printStackTrace();

        }`

so if for example you want to create a JSON object containing all the triplets you get from an SQLite db it would be:

String query = "SELECT *"+
             "from "+TABLE_NAME;

    Cursor c = db.rawQuery(query,new String[]{});
    Log.d("query",query);

    c.moveToFirst();
    while(c.moveToNext()){
        try {
            int id = c.getInt(c.getColumnIndex("ID"));
            String startDate = c.getString(c.getColumnIndex("START_DATE"));
            String endDate = c.getString(c.getColumnIndex("END_DATE"));

   object.put("id", id);
    object.put("startDate", startDate);
    object.put("endDate", endDate); }}

where ID, START_DATE and END_DATE are the corresponding names of the fields in DB.
I cannot test my code right now but I believe it works