dimanche 8 février 2015

Deleting item from ListView deletes some another item from SQLite database

If I delete an item from listView suppose item_no = 5, then some another item gets deleted from database whose id is not 5.


Here is my code.


My database class TRDBHelper.class



//Get single reminder
Cursor getReminder(int id){

SQLiteDatabase db = this.getReadableDatabase();

Cursor cursor = db.query(TABLE_NAME, new String[]{COLUMN_ID, COLUMN_TITLE, COLUMN_DES,
COLUMN_DATE, COLUMN_TIME}, COLUMN_ID + "=?",
new String[]{String.valueOf(id)}, null, null, null, null);
if(cursor != null)
cursor.moveToFirst();

return cursor;
}

//Get all reminders
public List<TRListFormat> getAllReminders(){

List<TRListFormat> remList = new ArrayList<>();

SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select * from " + TABLE_NAME, null);

if(cursor.moveToFirst()){
do {
TRListFormat format = new TRListFormat();
format.setId(Integer.parseInt(cursor.getString(0)));
format.setTitle(cursor.getString(1));
format.setDes(cursor.getString(2));
format.setDate(cursor.getString(3));
format.setTime(cursor.getString(4));

remList.add(format);
} while(cursor.moveToNext());
}
return remList;
}

//Delete single reminder
public void deleteReminder(int id){

SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_NAME, COLUMN_ID + " = ?", new String[]{ String.valueOf(id)});
db.close();
}


My list view TRList.class


I have use SimpleAdapter in listView and TRListForamat class has all getter and setter methods. Delete button is set on AlertDialog which pops when listView item is clicked



ListView lv;
SimpleAdapter adapter;
ArrayList<HashMap<String, String>> items;
List<TRListFormat> list;
TRDBHelper trDb;

public void refreshList() {
items = new ArrayList<>();
list = trDb.getAllReminders();

for (TRListFormat val : list) {
HashMap<String, String> map = new HashMap<>();
map.put("title", val.getTitle());
map.put("description", val.getDes());
map.put("date", val.getDate());
map.put("time", val.getTime());

items.add(map);
}
adapter = new SimpleAdapter(this, items, R.layout.tr_list_format,
new String[]{"title", "description", "date", "time"},
new int[]{R.id.tbr_title, R.id.tbr_des, R.id.tbr_date, R.id.tbr_time});

lv = (ListView) findViewById(R.id.tbr_list);
lv.setAdapter(adapter);
}

new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {

int remId = (int)id + 1;

adapter.getItem(remId);
adapter.getClass();

Cursor rs = trDb.getReminder(remId);
String id = rs.getString(rs.getColumnIndex(TRDBHelper.COLUMN_ID));
String title = rs.getString(rs.getColumnIndex(TRDBHelper.COLUMN_TITLE));

trDb.deleteReminder(Integer.parseInt(id));

Toast.makeText(getApplicationContext(), "id: "+id+" title:"+title+" deleted", Toast.LENGTH_SHORT).show();

refreshList();
}


What change do I need to delete same item from listview and database as well?


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