Jamil Jamil - 2 months ago 8
JSON Question

Sending ArrayList from Android to PHP script using JSON

What is the Scenario

I want to send multiple ArrayList (usally 5) from android to the server and want to insert it into mysql database.

What I Have Done Successfully

I have Successfully send single value and Multiple Values from Android to PHP script using JSON

i have Received single and Multiple Records from mysql database to android using JSON

Here is the Code for inserting and getting value from server

class TeacherLogin1 extends AsyncTask<Void, Void, Void> {

String name,pass;
Context contextt;
int idofteach = 0;
int codee = 0;

TeacherLogin1(String pass1,String name1,Context context)
{
name = name1;
pass = pass1;
contextt = context;
}

@Override
protected void onPreExecute() {
super.onPreExecute();
}


@Override
protected Void doInBackground(Void... arg0) {
codee = Authenticate(name,pass);

return null;
}

@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if(codee!=0)
{
Intent teachers = new Intent(context,TeachersView.class);
teachers.putExtra("TID", codee);
teachers.putExtra("TNAME", TeachName);
teachers.putExtra("sub1", subj1);
teachers.putExtra("sub2", subj2);
teachers.putExtra("sub3", subj3);
teachers.putExtra("sub4", subj4);
startActivity(teachers);
}
else
Toast.makeText(context, "Wrong Details", Toast.LENGTH_SHORT).show();
codee = 0;
}
}
public int Authenticate(String name,String Pass)
{

ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();

// put the values of id and name in that variable
nameValuePairs.add(new BasicNameValuePair("name",name));
nameValuePairs.add(new BasicNameValuePair("pass",Pass));



try
{
HttpClient httpclient = new DefaultHttpClient();
ScriptsFilePath a = new ScriptsFilePath();
HttpPost httppost = new HttpPost(a.TeacherAuthen);

httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("pass 1", "connection success ");
}
catch(Exception e)
{
Log.e("Fail 1", e.toString());
}

try
{
BufferedReader reader = new BufferedReader
(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
Log.e("pass 2", "connection success ");
}
catch(Exception e)
{
Log.e("Fail 2", e.toString());
}



try {

JSONObject jsonResponse = new JSONObject(result);
if(jsonResponse != null)
{
JSONArray jsonMainNode = jsonResponse.optJSONArray("GetTeacher");

for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
code = jsonChildNode.optInt("ID");
TeachName= jsonChildNode.optString("Name");
subj1= jsonChildNode.optString("subject1");
subj2= jsonChildNode.optString("subject2");
subj3= jsonChildNode.optString("subject3");
subj4= jsonChildNode.optString("subject4");
}

}

} catch (JSONException e) {
// Toast.makeText(getApplicationContext(), "Error" + e.toString(),
// Toast.LENGTH_SHORT).show();
}
return code;


}


and the TeacherAuthen.php script

<?php
error_reporting(E_ALL ^ E_DEPRECATED);
$host="localhost";
$uname="root";
$pwd='';
$db="examsystem";

$con = mysql_connect($host,$uname,$pwd) or die("connection failed");
mysql_select_db($db,$con) or die("db selection failed");

if(isset($_REQUEST)){
$name=$_REQUEST['name'];
$pass=$_REQUEST['pass'];}

$flag['code']=0;
$name1['code1'] = "sdf";

$sql = "SELECT * FROM teachers WHERE Username ='$name' and Pass='$pass'";
$result = mysql_query($sql);
$json = array();

if(mysql_num_rows($result)){
while($row=mysql_fetch_assoc($result)){
$json['GetTeacher'][]=$row;
}
}
echo json_encode($json);
mysql_close($con);
?>


where i am stuck

I dont no how to send ArrayList from android to PHP Script.

For Example I want to send these arraylists to php script =

ArrayList<String> Questions= new ArrayList<String>();
ArrayList<String> A1= new ArrayList<String>();
ArrayList<String> A2= new ArrayList<String>();
ArrayList<String> A3= new ArrayList<String>();
ArrayList<String> A4= new ArrayList<String>();


and then in the PHP script i want to insert like this

"INSERT INTO `Question` (`ID` ,`Question` ,`A1` ,`A2` ,`A3` , `A4` ) VALUES (NULL, '$Question', '$A1', '$A2', '$A3' ,'$A4'); "


if i am able to send even a single arrayList then i think i can make a way to do the above

and Thanks for you Time

Answer

This is your Array: you can create more as required in your example.

ArrayList<String> contact = new ArrayList<String>();

Then, create a JSONcontacts variable of type JSON to store this array in this object

JSONObject JSONcontacts = new JSONObject();

Now, loop through all elements in that contact array and store it in the JSONcontacts

//Loop through array of contacts and put them to a JSONcontact object
for (int i = 0; i < contact.size(); i++) {

    try {
        JSONcontacts.put("Count:" + String.valueOf(i + 1), contact.get(i));
    } catch (JSONException e) {
        e.printStackTrace();
    }

}

Lets say you created many Arrays, which you probably have done, now you hvave to put them all into 1 JSON. So create a EverythingJSON variable of type JSONObject()

JSONObject EverythingJSON = new JSONObject();

and now put all your contact array and other arrays into it, right you loop through them as described above:

EverythingJSON.put("contact", JSONcontacts);
EverythingJSON.put("something", JSONsoemthing);
EverythingJSON.put("else", JSONelse);

now this is your AsynchTask to send them to your PHP server:

    new AsyncTask() {
        //String responseBody = "";
        @SuppressWarnings("unused")
        protected void onPostExecute(String msg) {
            //Not Needed
        }

        protected Object doInBackground(Object... params) {
            //Create Array of Post Variabels
            ArrayList<NameValuePair> postVars = new ArrayList<NameValuePair>();

            //Add a 1st Post Value called JSON with String value of JSON inside
            //This is first and last post value sent because server side will decode the JSON and get other vars from it.
            postVars.add(new BasicNameValuePair("JSON", String.valueOf(JSON)));

            //Declare and Initialize Http Clients and Http Posts
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(Config.OnlineAPI);

            //Format it to be sent
            try {
                httppost.setEntity(new UrlEncodedFormEntity(postVars));

            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }

            /* Send request and Get the Response Back */                    
            try {

                HttpResponse response = httpclient.execute(httppost);
                String responseBody = EntityUtils.toString(response.getEntity());


            } catch (ClientProtocolException e) {
                e.printStackTrace();

                Log.v("MAD", "Error sending... ");


            } catch (IOException e) {
                e.printStackTrace();

                Log.v("MAD", "Error sending... ");


            }

            return null;
        }
    }.execute(null, null, null);

Now on the PHP server side, you can loop through this JSON as such: FIrst of all, get that JSON from POST and store it in a var:

//Receive JSON
$JSON_Received = $_POST["JSON"];

Now decode it from JSON:

//Decode Json
$obj = json_decode($JSON_Received, true);

And this is the loop to go through the array of contacts and get he Key and Value from it:

foreach ($obj['contact'] as $key => $value) 
        {
            //echo "<br>------" . $key . " => " . $value;
}

you can repeat this loop for other Arrays you have sent :) Good Luck!