durgaprasad kalapati durgaprasad kalapati - 3 months ago 6
Java Question

How to insert values into a sqlite database using beans and retieving those table values into json array

Inserting values into table using beans

public static void addGetAssessmentDetail(Context context,
GetAssessmentBean getassessmentDetail) {
DBHelper dbHelper = null;
SQLiteDatabase sqlDBRead = null;
SQLiteDatabase sqlDBWrite = null;
try {

dbHelper = new DBHelper(context, LektzDB.DB_NAME, null,
LektzDB.DB_VERSION);
sqlDBRead = dbHelper.getReadableDatabase();
sqlDBWrite = dbHelper.getWritableDatabase();

ContentValues book = new ContentValues();
book.put(TB_FinalAssessmentValues.CL_1_ID, getassessmentDetail.getId());
book.put(TB_FinalAssessmentValues.CL_2_USER_ID , getassessmentDetail.getUser_id());
book.put(TB_FinalAssessmentValues.CL_3_BOOK_ID, getassessmentDetail.getBook_id());
book.put(TB_FinalAssessmentValues.CL_4_CHAPTER_ID,
getassessmentDetail.getChapter_id());
book.put(TB_FinalAssessmentValues.CL_5_QUESTION_TYPE,
getassessmentDetail.getQuestion_type());
book.put(TB_FinalAssessmentValues.CL_6_QUESTION_ID,
getassessmentDetail.getQuestion_id());
book.put(TB_FinalAssessmentValues.CL_7_OPTION_ID,
getassessmentDetail.getOption_id());
book.put(TB_FinalAssessmentValues.CL_8_MARK,
getassessmentDetail.getMark());
book.put(TB_FinalAssessmentValues.CL_9_NOTES,
getassessmentDetail.getNotes());
book.put(TB_FinalAssessmentValues.CL_10_MATCH_OPTION, getassessmentDetail.getMatchOption());
book.put(TB_FinalAssessmentValues.CL_11_DRAG_VALUES,
getassessmentDetail.getDragValues());
book.put(TB_FinalAssessmentValues.CL_12_ADDED_TIME,
getassessmentDetail.getAdded_time());
Log.i("", "assessment values insertion success" );


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

}


And trying to retrieve those table values into JSON array

public JSONArray getFullAssessmentData(Context mContext, String bookid,
int UserId) {
DBHelper dbh = new DBHelper(mContext, LektzDB.DB_NAME, null,
LektzDB.DB_VERSION);
SQLiteDatabase db = dbh.getReadableDatabase();
JSONArray resultSet = new JSONArray();
try {
Cursor c = db.rawQuery("SELECT * FROM " + TB_FinalAssessmentValues.NAME
+ " WHERE " + TB_FinalAssessmentValues.CL_3_BOOK_ID+ "='"+ bookid + "'", null);
Log.i("tag", "msg vachindi");

if (c.getCount() > 0) {

c.moveToFirst();
do {
c.moveToFirst();
while (c.isAfterLast() == false) {
int totalColumn = c.getColumnCount();
JSONObject rowObject = new JSONObject();
for (int i = 0; i < totalColumn; i++) {
if (c.getColumnName(i) != null) {
try {
rowObject.put(c.getColumnName(i),
c.getString(i));
} catch (Exception e) {
}
}
}
resultSet.put(rowObject);
c.moveToNext();
}

c.close();
db.close();
}
while (c.moveToNext());
}
} catch (Exception e) {
e.printStackTrace();
}
return resultSet;
}


And Finally trying to store those values into JSON array

JSONArray fullassessmentjson = rdb.getFullAssessmentData( getContext(), BookId, UserId);
Log.i("Tag123456","Finalcheck"+fullassessmentjson);


DBHelper

db.execSQL("CREATE TABLE IF NOT EXISTS " + TB_FinalAssessmentValues.NAME + "("
+ TB_FinalAssessmentValues.CL_1_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_2_USER_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_3_BOOK_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_4_CHAPTER_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_5_QUESTION_TYPE + " TEXT, "
+ TB_FinalAssessmentValues.CL_6_QUESTION_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_7_OPTION_ID + " TEXT, "
+ TB_FinalAssessmentValues.CL_8_MARK + " TEXT, "
+ TB_FinalAssessmentValues.CL_9_NOTES + " TEXT, "
+ TB_FinalAssessmentValues.CL_10_MATCH_OPTION + " TEXT, "
+ TB_FinalAssessmentValues.CL_11_DRAG_VALUES + " TEXT, "
+ TB_FinalAssessmentValues.CL_12_ADDED_TIME + " TEXT)");


and the error is its showing nothing in the Json array

Answer

Seems like you're adding the values to your ContentValues object, but do not perform the actual insert into the database.

Because of this you're basically querying an empty table.

You should call the insert() method of SQLiteDatabase at the end of addGetAssessmentDetail() to insert the data into your table:

sqlDBWrite.insert(TABLE_TO_INSERT, null, book);