android数据库每次查询完都要关闭吗
public ArrayList<Info> queryDatabase(DatabaseHelper dbHelper,String table, String[] columns, String selection,
String[] selectionArgs, String groupBy, String having, String orderBy){
ArrayList<Info> infoList = new ArrayList<Info>();
db = dbHelper.getReadableDatabase();
Cursor cursor = db.query(table, columns, selection,
selectionArgs, groupBy, having, orderBy);
while(cursor.moveToNext()==true){
Info info = new Info();
info.id = Integer.valueOf(cursor.getString(cursor.getColumnIndex("id")));
info.accountname = cursor.getString(cursor.getColumnIndex("accountname"));
info.in_out = cursor.getString(cursor.getColumnIndex("in_out"));
info.logo = Integer.valueOf(cursor.getString(cursor.getColumnIndex("logo")));
info.moneys = cursor.getString(cursor.getColumnIndex("moneys"));
info.remark = cursor.getString(cursor.getColumnIndex("remark"));
info.sort = cursor.getString(cursor.getColumnIndex("sort"));
info.time = cursor.getString(cursor.getColumnIndex("time"));
info.user = cursor.getString(cursor.getColumnIndex("user"));
infoList.add(info);
}
cursor.close();
return infoList;
}
这个是我查询的方法,每查上3次log就会打出一堆error信息,应用还是可以继续查询的,没有影响,但老看着那些error就是不舒服,如果每次查询完都关闭数据库,效率上会不会降低很多?有别的方法解决吗