如何从Android中的sqlite 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，您必须确保您要提取的列存储文本。在这种情况下，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) 
} 

您可以将返回int值，以及转换为使用

String mValue = String.valueOf(intValue);