我有一个用于管理我的活动中的片段的基类。它处理片段backstack,打开等,但在方向改变这个对象变为空,我失去了我所有的片段状态。屏幕方向更改后活动类成员变量(对象)损失
public class Dashboard extends AbstractNavDrawerActivity implements AsyncRequest
.OnAsyncRequestComplete {
BaseFragmentOrganizer fragmentOrganizer;//object that manages backstack and other operation
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//on orientation change fragmentOrganizer becomes null so no more backstack.
if (savedInstanceState == null) {
fragmentOrganizer = new MainFragmentOrganizer(getSupportFragmentManager());
}
看看这个http://stackoverflow.com/questions/15313598/once-for-all-how-to-correctly-save-instance-state-of-fragments-in-back-stack –