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[英]Getting a SUM value for a SQlite column and assigning it to Textview
[英]Getting Higest Value in Sqlite and Set Text to TextView
有人可以告訴我如何在SQLITE中獲取最大的數字並將其設置為TextView嗎?
public Cursor MaxPrice() {
Cursor m = ourDatabase.rawQuery("SELECT MAX( " + Pro_Price + " ) FROM "+ TABLE_NAME + " " , null);
return m;
}
這是其他課程的另一部分:
Database dbb = new Database(this);
dbb.open();
String Hexpense = dbb.MaxPrice();
tvHighestExpense.setText( Hexpense);
您的方法MaxPrice()返回一個Cursor。 因此,您應該從游標包含的第一行(唯一行)中提取值:
Cursor c = dbb.MaxPrice()
c.moveToFirst();
if (!c.isAfterLast()) {
tvHighestExpense.setText(c.getLong(0));
}
Cursor m=...
long max=m.getLong(0/*column index*/);
tvHighestExpense.setText(String.valueOf(max));
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