Putting Cursor Data Into An Array

Being new in Android, I am having trouble dealing with the following: public String[] getContacts(){ Cursor cursor = getReadableDatabase().rawQuery('SELECT name FROM contacts',

Solution 1:

names.add(cursor.getString(i));

"i" is not the cursor row index, it's the column index. A cursor is already positioned to a specific row. If you need to reposition your cursor. Use cursor.move or moveToXXXX (see documentation).

For getString/Int/Long etc. you just need to tell the cursor which column you want. If you don't know the columnIndex you can use cursor.getColumnIndex("yourColumnName").

Your loop should look like this:

publicString[] getContacts(){
    Cursor cursor = getReadableDatabase().rawQuery("SELECT name FROM contacts", null);
    cursor.moveToFirst();
    ArrayList<String> names = newArrayList<String>();
    while(!cursor.isAfterLast()) {
        names.add(cursor.getString(cursor.getColumnIndex("name")));
        cursor.moveToNext();
    }
    cursor.close();
    return names.toArray(newString[names.size()]);
}

Solution 2:

I hope its useful to you.

publicstatic ArrayList<ModelAgents> SelectAll(DbHelper dbaConnection) {
            ArrayList<ModelAgents> Agents_aList = newArrayList<ModelAgents>();

            SQLiteDatabasesqldb= dbaConnection.openDataBase();
            Cursorcursor= sqldb.rawQuery("SELECT * FROM Agents", null);
            if (cursor != null)// If Cursordepot is null then do// nothing
            {
                if (cursor.moveToFirst()) {


                    do {
                        // Set agents information in model.ModelAgentsAgents=newModelAgents();
                        Agents.setID(cursor.getInt(cursor
                                .getColumnIndex(TblAgents.ID)));
                        Agents.setCode(cursor.getString(cursor
                                .getColumnIndex(TblAgents.CODE)));
                        Agents.setName(cursor.getString(cursor
                                .getColumnIndex(TblAgents.NAME)));

                        Agents_aList.add(Agents);
                    } while (cursor.moveToNext());
                }
                cursor.close();
            }

            sqldb.close();

            return Agents_aList;

        }

Solution 3:

use this:

if (cursor != null && cursor.getCount()>0){
  cursor.moveToFirst();
  do{
    for(int i = 0; i < cursor.getCount(); i ++){
      names.add(cursor.getString(i));
    }
  }while(cursor.moveToNext());
}

cursor.close();

Solution 4:

Try to put the data into the ArrayList<String> as below:

publicArrayList<String> getContacts(){
        Cursor cursor = getReadableDatabase().rawQuery("SELECT name FROM contacts", null);
        ArrayList<String> names=newArrayList<String>();
        if (cursor != null)
        {
            if (cursor.moveToFirst()) {
                for(int i = 0; i < cursor.getCount(); i ++){
                      names.add(cursor.getString(i));
                   }
               }
       cursor.close();
     }
     return names;
  }