Java “如何修复”;FragmentManager已在执行事务”;错误?
自从我更新了我的应用程序实现后,我发现自己无法使用该应用程序 我收到一个“java.lang.IllegalStateException:FragmentManager已在执行事务”错误,似乎无法找到解决此问题的方法Java “如何修复”;FragmentManager已在执行事务”;错误?,java,android,google-cloud-firestore,fragmenttransaction,fragment-lifecycle,Java,Android,Google Cloud Firestore,Fragmenttransaction,Fragment Lifecycle,自从我更新了我的应用程序实现后,我发现自己无法使用该应用程序 我收到一个“java.lang.IllegalStateException:FragmentManager已在执行事务”错误,似乎无法找到解决此问题的方法 public class MainActivity extends AppCompatActivity { private Toolbar mainToolbar; private FirebaseAuth mAuth; private FirebaseFirestore fir
public class MainActivity extends AppCompatActivity {
private Toolbar mainToolbar;
private FirebaseAuth mAuth;
private FirebaseFirestore firebaseFirestore;
private String current_user_id;
private BottomNavigationView mainbottomNav;
private HomeFragment accountFragment;
private NotificationFragment notificationFragment;
private FilterFragment filterFragment;
private UserProfileFragment userProfileFragment;
private MapFragment homeFragment;
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
firebaseFirestore = FirebaseFirestore.getInstance();
if (mAuth.getCurrentUser() != null) {
current_user_id = mAuth.getCurrentUser().getUid();
mainbottomNav = findViewById(R.id.mainBottomNav);
BottomNavigationViewHelper.disableShiftMode(mainbottomNav);
BottomNavigationMenuView bottomNavigationMenuView =
(BottomNavigationMenuView) mainbottomNav.getChildAt(0);
View v = bottomNavigationMenuView.getChildAt(2);
BottomNavigationItemView itemView = (BottomNavigationItemView) v;
// FRAGMENTS
homeFragment = new MapFragment();
notificationFragment = new NotificationFragment();
accountFragment = new HomeFragment();
filterFragment = new FilterFragment();
userProfileFragment = new UserProfileFragment();
initializeFragment();
mainbottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment currentFragment = getSupportFragmentManager().findFragmentById(R.id.main_container);
switch (item.getItemId()) {
case R.id.bottom_action_home:
replaceFragment(homeFragment, currentFragment);
return true;
case R.id.bottom_action_filters:
replaceFragment(filterFragment, currentFragment);
return true;
case R.id.bottom_action_account:
replaceFragment(userProfileFragment, currentFragment);
replaceFragment(accountFragment, currentFragment);
return true;
case R.id.bottom_action_notif:
replaceFragment(notificationFragment, currentFragment);
notifCount.setVisibility(View.GONE);
return true;
default:
return false;
}
}
});
private void initializeFragment() {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.main_container, homeFragment);
fragmentTransaction.add(R.id.main_container, filterFragment);
fragmentTransaction.add(R.id.main_container, notificationFragment);
fragmentTransaction.add(R.id.main_container, accountFragment);
fragmentTransaction.add(R.id.main_container, userProfileFragment);
fragmentTransaction.hide(filterFragment);
fragmentTransaction.hide(notificationFragment);
fragmentTransaction.hide(accountFragment);
fragmentTransaction.hide(userProfileFragment);
fragmentTransaction.commit();
}
@SuppressLint("RestrictedApi")
private void replaceFragment(Fragment currentFragment, Fragment fragment) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
if (currentFragment == homeFragment) {
fragmentTransaction.hide(userProfileFragment);
fragmentTransaction.hide(filterFragment);
fragmentTransaction.hide(accountFragment);
fragmentTransaction.hide(notificationFragment);
if (addEventBtn.isEnabled()) {
addEventBtn.setVisibility(View.VISIBLE);
}
addPostBtn.setEnabled(false);
}
if (currentFragment == accountFragment) {
fragmentTransaction.hide(filterFragment);
fragmentTransaction.hide(homeFragment);
fragmentTransaction.hide(notificationFragment);
addPostBtn.setEnabled(true);
if (addEventBtn.isEnabled()) {
addEventBtn.setVisibility(View.GONE);
}
}
if (currentFragment == notificationFragment) {
fragmentTransaction.hide(userProfileFragment);
fragmentTransaction.hide(filterFragment);
fragmentTransaction.hide(homeFragment);
fragmentTransaction.hide(accountFragment);
addPostBtn.setEnabled(false);
if (addEventBtn.isEnabled()) {
addEventBtn.setVisibility(View.GONE);
}
}
if (currentFragment == filterFragment) {
fragmentTransaction.hide(userProfileFragment);
fragmentTransaction.hide(notificationFragment);
fragmentTransaction.hide(homeFragment);
fragmentTransaction.hide(accountFragment);
addPostBtn.setEnabled(false);
if (addEventBtn.isEnabled()) {
addEventBtn.setVisibility(View.GONE);
}
}
fragmentTransaction.show(currentFragment);
fragmentTransaction.commit();
//fragmentTransaction.replace(R.id.main_container, fragment);
}
}
错误:
java.lang.RuntimeException:无法启动活动组件信息{com.app.Activities.MainActivity}:java.lang.IllegalStateException:FragmentManager已在执行事务
编辑2:经过进一步的研究,我终于找到了导致车祸的真正原因。显然,每当我在片段上使用“addSnapshotListener”时,就会出现“FragmentManager已经在执行事务”错误。我认为它与“getActivity()”有关,但是,我无法理解为什么它会提示应用程序崩溃。我正在按照Firebase文档中的建议分离侦听器
片段代码:
public class NotificationFragment extends Fragment {
private RecyclerView mNotificationList;
private NotificationsAdapter notificationsAdapter;
private List<Notifications> mNotifList;
private FirebaseFirestore mFirestore;
private String TAG = "Notification Fragment";
public NotificationFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View v = inflater.inflate(R.layout.fragment_notification, container, false);
mNotifList = new ArrayList<>();
mNotificationList = (RecyclerView) v.findViewById(R.id.notification_list);
notificationsAdapter = new NotificationsAdapter(mNotifList);
mNotificationList.setHasFixedSize(true);
mNotificationList.setLayoutManager(new LinearLayoutManager(container.getContext()));
mNotificationList.setAdapter(notificationsAdapter);
mFirestore = FirebaseFirestore.getInstance();
final String current_user_id = FirebaseAuth.getInstance().getCurrentUser().getUid();
Query query = mFirestore.collection("Users").document(current_user_id).collection("Notifications");
ListenerRegistration registration = query.addSnapshotListener(getActivity(), new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
if (documentSnapshots != null && !documentSnapshots.isEmpty()) {
for (DocumentChange doc : documentSnapshots.getDocumentChanges()) {
if (doc.getType() == DocumentChange.Type.ADDED) {
final String notificationId = doc.getDocument().getId();
Notifications notifications = doc.getDocument().toObject(Notifications.class).withId(notificationId);
mNotifList.add(notifications);
Log.d(TAG, "list ids: " + notificationId);
notificationsAdapter.notifyDataSetChanged();
}
}
}
}
});
registration.remove();
return v;
}
公共类NotificationFragment扩展了片段{
私人回收站查看通知列表;
私人通知助理通知助理;
私有列表mNotifList;
私人FirebaseFirestore mFirestore;
私有字符串TAG=“通知片段”;
公共通知片段(){
//必需的空公共构造函数
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
最终视图v=充气机。充气(R.layout.fragment_通知,容器,错误);
mNotifList=newarraylist();
mNotificationList=(RecyclerView)v.findViewById(R.id.notification\u list);
notificationsAdapter=新的notificationsAdapter(mNotifList);
mNotificationList.setHasFixedSize(true);
mNotificationList.setLayoutManager(新的LinearLayoutManager(container.getContext());
mNotificationList.setAdapter(notificationsAdapter);
mFirestore=FirebaseFirestore.getInstance();
最后一个字符串current_user_id=FirebaseAuth.getInstance().getCurrentUser().getUid();
Query Query=mFirestore.collection(“用户”).document(当前用户id).collection(“通知”);
ListenerRegistration=query.addSnapshotListener(getActivity(),new EventListener()){
@凌驾
public void OneEvent(QuerySnapshot文档快照,FireBaseFireStore异常e){
if(documentSnapshots!=null&&!documentSnapshots.isEmpty()){
对于(DocumentChange文档:documentSnapshots.getDocumentChanges()){
if(doc.getType()==DocumentChange.Type.ADDED){
最后一个字符串notificationId=doc.getDocument().getId();
Notifications Notifications=doc.getDocument().toObject(Notifications.class).withId(notificationId);
mNotifList.add(通知);
Log.d(标签,“列表ID:+通知ID”);
notificationsAdapter.notifyDataSetChanged();
}
}
}
}
});
注册。删除();
返回v;
}
我能够解决它!对于那些遇到同样问题的人来说,只要在使用“addSnapshotListener”时摆脱getActivity就行了在片段上。此错误在嵌套片段中也很常见:在这种情况下,您必须使用childFragmentManager
而不是嵌套片段中的fragmentManager
。@muetzenflo,谢谢您的解释。为我解决了这个问题