Android Select row by Id in Sqlite?

Question

I want to get a specific row by id in android sqlite and have written the following code, but it does not return any records. I have written a getAllRecords() m

Answer 1

I solved this issue by adding "autoincrement" property to id, while creating the table

db.execSQL("CREATE TABLE IF NOT EXISTS " + BanksTable.NAME +" ( " +BanksTable.COL_ID + " 
integer PRIMARY KEY **autoincrement**, "+ BanksTable.COL_NAME + " varchar, " + 
BanksTable.COL_IMAGE_URL + " varchar," + BanksTable.COL_IMAGE + " blob);");

Answer 2

I ended up this problem by changing parameter to name. Its weird but I still don't know why it was not working.

I was getting bank id like 0,1,2,3,4 maybe it is not allowed in SQLite or internally affecting it but still I am not sure.

cursor =  this.db.rawQuery("select * from " + BanksTable.NAME + " where " + BanksTable.COL_NAME + "='" + bankName + "'" , null);

Answer 3

Here is my approach to get custem object from sqlite db

    fun getTaskById(itemId: Int): ModelTask {
    val food= ModelTask()

    val database = readableDatabase
    val kolonlar = arrayOf(DBContract.TaskEntry.COLUMN_T_ID,
            DBContract.TaskEntry.COLUMN_T_TITLE,
            DBContract.TaskEntry.COLUMN_T_DESC,
            DBContract.TaskEntry.COLUMN_T_TIME,
            DBContract.TaskEntry.COLUMN_T_PRIORITY,
            DBContract.TaskEntry.COLUMN_T_DATE,
            DBContract.TaskEntry.COLUMN_T_DONE)
    val whereClause =  DBContract.TaskEntry.COLUMN_T_ID + " = ? "
    val whereArgs = arrayOf(itemId.toString())
    val cursor = database.query( DBContract.TaskEntry.TABLE_NAME_TASK, kolonlar, whereClause, whereArgs,
            null, null,  DBContract.TaskEntry.COLUMN_T_ID + " DESC")

    while (cursor.moveToNext()) {

        food.id = cursor.getInt(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_ID))
        food.title = cursor.getString(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_TITLE))
        food.description = cursor.getString(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_DESC))
        food.time = cursor.getString(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_TIME))
        food.priority = cursor.getString(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_PRIORITY))
        food.date = cursor.getString(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_DATE))
        food.done = cursor.getInt(cursor.getColumnIndex(DBContract.TaskEntry.COLUMN_T_DONE))
     }
    database.close()
    cursor.close()
    return foodList
}