Firebase Firestore addSnapshotListener()可能导致"FragmentManager已在执行事务“错误
Firebase Firestore addSnapshotListener()可能导致"FragmentManager已在执行事务“错误
提问于 2019-04-10 17:16:13
我最近拿起了一个项目，我之前正在做一个项目，更新了依赖项，与这个事件相关，我将firestore的依赖项(com.google.firebase:firebase-firestore)从17.1.5更新到了最新的18.2.0。
java.lang.IllegalStateException: FragmentManager已在执行事务
具体代码如下：
docRef.collection(COLLECTION_PATH).addSnapshotListener(Objects.requireNonNull(getActivity()), (queryDocumentSnapshots, e) -> {
//other stuff to do after detecting collection change
});我猜Firestore中的某种行为改变破坏了我的代码，但我仍然不确定它到底是什么，以及如何修复它。
下面是详细的错误堆栈跟踪：
java.lang.IllegalStateException: FragmentManager is already executing transactions
at androidx.fragment.app.FragmentManagerImpl.ensureExecReady(FragmentManagerImpl.java:1657)
at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManagerImpl.java:1717)
at androidx.fragment.app.FragmentManagerImpl.executePendingTransactions(FragmentManagerImpl.java:228)
at com.google.firebase.firestore.util.ListenerRegistrationImpl.lambda$onFragmentActivityStopCallOnce$1(com.google.firebase:firebase-firestore@@18.2.0:190)
at com.google.firebase.firestore.util.ListenerRegistrationImpl$$Lambda$2.run(Unknown Source:4)
at android.app.Activity.runOnUiThread(Activity.java:6282)
at com.google.firebase.firestore.util.ListenerRegistrationImpl.onFragmentActivityStopCallOnce(com.google.firebase:firebase-firestore@@18.2.0:174)
at com.google.firebase.firestore.util.ListenerRegistrationImpl.<init>(com.google.firebase:firebase-firestore@@18.2.0:209)
at com.google.firebase.firestore.Query.addSnapshotListenerInternal(com.google.firebase:firebase-firestore@@18.2.0:917)
at com.google.firebase.firestore.Query.addSnapshotListener(com.google.firebase:firebase-firestore@@18.2.0:882)
at com.google.firebase.firestore.Query.addSnapshotListener(com.google.firebase:firebase-firestore@@18.2.0:823)
... [My app's call to addSnapshotListener] ...
at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2565)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:907)
at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1235)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1301)
at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:710)
at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManagerImpl.java:2071)
at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManagerImpl.java:1861)
at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManagerImpl.java:1816)
at androidx.fragment.app.FragmentManagerImpl.execSingleAction(FragmentManagerImpl.java:1693)
at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:560)
at androidx.fragment.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:148)
at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1244)
at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1092)
at androidx.viewpager.widget.ViewPager.onMeasure(ViewPager.java:1622)
at android.view.View.measure(View.java:23169)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:743)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:815)
at android.view.View.measure(View.java:23169)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:23169)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:403)
at android.view.View.measure(View.java:23169)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23169)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)回答 1
Stack Overflow用户
回答已采纳
发布于 2019-04-25 20:51:53
删除addSnapshotListener中的getActivity()。在onPause()上使用listener.remove处理侦听器分离。
Query query = db.collection("cities");
ListenerRegistration registration = query.addSnapshotListener(
new EventListener<QuerySnapshot>() {
// ...
});
// ...
// Stop listening to changes
registration.remove();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/55608927
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