我从Firebase获取事件列表，并使用FirebaseUI填充RecyclerView。事件对象具有一个名为参与的字段，该字段为 true 或 false。
如何在参与的字段中隐藏/删除值为 false 的对象？我知道最好的方法是单独存储所有参与的事件，然后从中填充RecyclerView，但由于事件的结构，这是不可能的。
编辑：
2019-04-02 12:32:51.126 7807-7807/com.example.concertmate E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.concertmate, PID: 7807
java.lang.IllegalArgumentException: When using orderByPriority(), values provided to startAt(), endAt(), or equalTo() must be valid priorities.
at com.google.firebase.database.Query.validateQueryEndpoints(com.google.firebase:firebase-database@@16.0.6:106)
at com.google.firebase.database.Query.startAt(com.google.firebase:firebase-database@@16.0.6:377)
at com.google.firebase.database.Query.startAt(com.google.firebase:firebase-database@@16.0.6:363)
at com.google.firebase.database.Query.equalTo(com.google.firebase:firebase-database@@16.0.6:568)
at com.example.concertmate.Fragments.ConcertFragment.onCreateView(ConcertFragment.java:115)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2439)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2243)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:654)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:146)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1244)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1092)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1622)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:95)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1556)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:803)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
at android.view.View.measure(View.java:23355)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1535)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:825)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:704)
at android.view.View.measure(View.java:23355)
2019-04-02 12:32:51.126 7807-7807/com.example.concertmate E/AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:717)
at android.view.View.measure(View.java:23355)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2917)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1747)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2040)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1635)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7795)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1172)
at android.view.Choreographer.doCallbacks(Choreographer.java:984)
at android.view.Choreographer.doFrame(Choreographer.java:809)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1158)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6863)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-04-02 12:32:51.127 7807-7807/com.example.concertmate E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.concertmate, PID: 7807
java.lang.IllegalArgumentException: When using orderByPriority(), values provided to startAt(), endAt(), or equalTo() must be valid priorities.
at com.google.firebase.database.Query.validateQueryEndpoints(com.google.firebase:firebase-database@@16.0.6:106)
at com.google.firebase.database.Query.startAt(com.google.firebase:firebase-database@@16.0.6:377)
at com.google.firebase.database.Query.startAt(com.google.firebase:firebase-database@@16.0.6:363)
at com.google.firebase.database.Query.equalTo(com.google.firebase:firebase-database@@16.0.6:568)
at com.example.concertmate.Fragments.ConcertFragment.onCreateView(ConcertFragment.java:115)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2439)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2243)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:654)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:146)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1244)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1092)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1622)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:95)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1556)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:803)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
at android.view.View.measure(View.java:23355)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:23355)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1535)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:825)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:704)
at android.view.View.measure(View.java:23355)
2019-04-02 12:32:51.127 7807-7807/com.example.concertmate E/AndroidRuntime: at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6758)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:717)
at android.view.View.measure(View.java:23355)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2917)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1747)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2040)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1635)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7795)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1172)
at android.view.Choreographer.doCallbacks(Choreographer.java:984)
at android.view.Choreographer.doFrame(Choreographer.java:809)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1158)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6863)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
这是我尝试使用 equalTo 进行查询时遇到的错误。
query = FirebaseDatabase.getInstance()
.getReference()
.child("concert").child(auth.getCurrentUser().getUid()).equalTo(true,"favorite");
这是数据库结构的图像。火力基地结构
这是concert -> user uuid -> event uuid.
在 recyclerView 视图中的 onBind 中，您可以检查该变量是真还是假。如果为 true，则可以移动到下一个对象，而无需设置值。
如果您提供一些示例，您将尝试过什么以及如何设置您的回收器视图，这将很有帮助，以便我实际上可以提供一些工作示例。
另一种选择是以仅检索 true 对象或仅检索 false 对象的方式查询数据。