如何从Android中的sqlite中的select语句返回一个字符串？

Question

String selectQuery = "SELECT accno from AccountMaster where pan = " + pan;

Cursor cursor = db.rawQuery(selectQuery, null);

int accno = 0;
if(cursor.moveToFirst())
accno=cursor.getInt(0);

Answer 1

首先，您必须确保要获取的列存储文本。在那种情况下使用

String selectQuery = "SELECT accno from AccountMaster where pan = " + pan;
Cursor cursor = db.rawQuery(selectQuery, null);
if(cursor.moveToFirst()){
   String value = cursor.getString(indexNumber)
}

否则，如果列存储了int，则可以执行此操作。

String selectQuery = "SELECT accno from AccountMaster where pan = " + pan;
Cursor cursor = db.rawQuery(selectQuery, null);
if(cursor.moveToFirst()){
   int value = cursor.getInt(indexNumber)
}

您也可以使用

将返回的int值转换为String值

String mValue = String.valueOf(intValue);