How to insert values in sqlite?

My question is how do I store values in sqlite database that i am receiving from web service. I am new here in Android. I need some help. Thanks in advance. I searched for an appropriate answer for days now with no solution at all.

Below responseStr is the Object I am receiving as a response from webservice, whose values I would like to store in the database.

  SQLiteDB sqlite_obj = new SQLiteDB(UrlActivity.this);


  try
                               {                   
                                JSONObject mainObject = new JSONObject(responseStr);
                                String url = mainObject.getString("url");

                                if(url.equals("valid")){

                                    //JSONObject data= new JSONObject();
                                    //data.put("data",jsonArray2); 

                                    //List <NameValuePair> nvps2 = new ArrayList <NameValuePair>();
                                    //nvps2.add(new BasicNameValuePair("data", mainObject.toString()));

                                    try{
                                    ProgressBar1.setVisibility(View.GONE);
                                    Toast.makeText(UrlActivity.this,  responseStr, Toast.LENGTH_LONG).show();

                                    sqlite_obj.open();
                                    sqlite_obj.deleteAll(); 

                                    JSONArray jsonArray2 = new JSONArray();
                                    jsonArray2.put(mainObject);
                                    for (int i = 0; i < jsonArray2.length(); i++) {
                                    JSONObject object = jsonArray2.getJSONObject(i);
                                    //sqlite_obj.insert();


                                    }

                                    sqlite_obj.close();


                                    Toast.makeText(getBaseContext(), "Stored in SQLite DB", Toast.LENGTH_LONG).show();

                                    } catch (android.database.sqlite.SQLiteException e) {
                                        Log.e(TAG, "SQLiteException:" + e.getMessage());
                                    } catch (Exception e) {
                                        Log.e(TAG, "Exception:" + e.getMessage());
                                    }
                                    }

Also, below is my SQLiteDB class.

 public class SQLiteDB {
public static final String KEY_ROWID = "_id";
public static final String KEY_USER_ID= "user_id";
public static final String KEY_NUMBER_OF_CHECKIN= "no_of_checkin";
public static final String KEY_STATUS="status";
public static final String KEY_URL="url";


private static final String TAG = "DBAdapter";
private static final String DATABASE_NAME = "SQLiteDB";

private static final String DATABASE_TABLE = "databasetable";
private static final int DATABASE_VERSION = 1;

private static final String DATABASE_CREATE = 
        "create table databasetable (_id integer primary key autoincrement, " +

        "user_id integer not null, " +
        "no_of_checkin integer not null, " +
        "status integer not null, " +
        "url text not null );";

private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;

public SQLiteDB(Context ctx) {

    this.context = ctx;
    DBHelper = new DatabaseHelper(context);
}

private static class DatabaseHelper extends SQLiteOpenHelper {

    DatabaseHelper(Context context) {

        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {

        try {
            db.execSQL(DATABASE_CREATE);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

        Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS databasetable");
        onCreate(db);
    }
}

//---open SQLite DB---
public SQLiteDB open() throws SQLException {

    db = DBHelper.getWritableDatabase();
    return this;
}

//---close SQLite DB---
public void close() {

    DBHelper.close();
}

//---insert data into SQLite DB---
public long insert( 
        Integer user_id, Integer no_of_checkin, Integer status, String url) {

    ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_USER_ID, user_id);
    initialValues.put(KEY_NUMBER_OF_CHECKIN, no_of_checkin);
    initialValues.put(KEY_STATUS, status);
    initialValues.put(KEY_URL, url);


    return db.insert(DATABASE_TABLE, null, initialValues);
}

//---Delete All Data from table in SQLite DB---
public void deleteAll() {

    db.delete(DATABASE_TABLE, null, null);
}   

}