如何修复SELECT
J.Id, J.date, J.drac, D.name as draccount, J.crac,
C.name as craccount, J.dramt, J.cramt, J.lf,
J.description, J.voucherType, J.reg_date, J.last_update,
J.active
FROM Journal J
INNER JOIN Ledger D ON J.drac = D.Id
INNER JOIN Ledger C ON J.crac = C.Id
?不确定我是否以正确的方法实现,但是调试器说Main is not abstract and does not override abstract method onTabReselected(Tab,FragmentTransaction) in TabListener
是未使用的语句。
我从here获得了来源。
import android.app.FragmentTransaction;
答案 0 :(得分:1)
ActionBar.TabListener是一个界面。因此,如果您在活动中实施ActionBar.TabListener,则必须在活动中实施这些方法:
onTabReselected(ActionBar.Tab tab, FragmentTransaction ft){}
onTabSelected(ActionBar.Tab tab, FragmentTransaction ft){}
onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft){}
参考:http://developer.android.com/reference/android/app/ActionBar.TabListener.html
答案 1 :(得分:0)
在公众面前添加摘要
public abstract class Main extends FragmentActivity implements ActionBar.TabListener {