每次我更改标签时，我的应用程序崩溃，而前一个标签仍在加载并出现上述错误。
E /：[ZeroHung] zrhung_get_config：wp [0x0008] E /的获取配置失败： [ZeroHung] zrhung_get_config：wp [0x0008] E /的获取配置失败： [ZeroHung] zrhung_get_config：wp [0x0008]的获取配置失败 I /聊天：uid = 10335（com.yr.meetmefit）HeapTaskDaemon相同的1行 E /：[ZeroHung] zrhung_get_config：wp [0x0008]的配置失败 W / ClassMapper：在课堂上找不到熟练的设置者/领域 com.yr.meetmefit.util.User（字段/设置者区分大小写！） 在类com.yr.meetmefit.util.User上找不到preferredWorkoutLocation的设置器/字段（字段/设置者区分大小写！） 在类com.yr.meetmefit.util.User上找不到typeOfWorkout的设置器/字段（字段/设置者区分大小写！） 在类com.yr.meetmefit.util.User上找不到用于FitnessGoal的设置器/字段（字段/设置者区分大小写！） 在com.yr.meetmefit.util.User类上找不到ID的设置器/字段 在类com.yr.meetmefit.util.User上找不到用于FitnessGoalsId的设置器/字段（字段/设置者区分大小写！） D / AndroidRuntime：关闭VM E / AndroidRuntime：致命异常： 主要 流程：com.yr.meetmefit，PID：25488 java.lang.IllegalStateException：noUsersLayout不能为null 在com.yr.meetmefit.fragments.SwipeFragment.populateItems（SwipeFragment.kt：162） 在com.yr.meetmefit.fragments.SwipeFragment $ onViewCreated $ 1.onDataChange（SwipeFragment.kt：72） com.google.firebase.database.Query $ 1.onDataChange（com.google.firebase：firebase-database @@ 19.1.0：179） com.google.firebase.database.core.ValueEventRegistration.fireEvent（com.google.firebase：firebase-database @@ 19.1.0：75） com.google.firebase.database.core.view.DataEvent.fire（com.google.firebase：firebase-database @@ 19.1.0：63） com.google.firebase.database.core.view.EventRaiser $ 1.run（com.google.firebase：firebase-database @@ 19.1.0：55） 在android.os.Handler.handleCallback（Handler.java:907） 在android.os.Handler.dispatchMessage（Handler.java:105） 在android.os.Looper.loop（Looper.java:216） 在android.app.ActivityThread.main（ActivityThread.java:7625） 在java.lang.reflect.Method.invoke（本机方法） 在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:524） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:987） I / OpenGLRenderer：戴维！持续时间= 2900ms;标志= 0， IntendedVsync = 31039276901138，Vsync = 31039693567788， OldestInputEvent = 9223372036854775807，NewestInputEvent = 0， HandleInputStart = 31039708966612，AnimationStart = 31039709060362， PerformTraversalsStart = 31039709958800，DrawStart = 31042094212445， SyncQueued = 31042129277029，SyncStart = 31042129370258， IssueDrawCommandsStart = 31042130287966，SwapBuffers = 31042175786404， FrameCompleted = 31042177035362，DequeueBufferDuration = 418000， QueueBufferDuration = 269000，I / Process：正在发送信号。 PID：25488 SIG：9进程25488已终止。
有人可以帮助我解决崩溃问题吗？
代码
[class SwipeFragment : Fragment() {
private var callback: MeetMeFitCallback? = null
private lateinit var userId: String
private lateinit var userDatabase: DatabaseReference
private lateinit var chatDatabase: DatabaseReference
private var cardsAdapter: ArrayAdapter<User>? = null
private var rowItems = ArrayList<User>()
private var preferredGender: String? = null
private var location: String? = null
private var userName: String? = null
private var imageUrl: String? = null
fun setCallBack(callback: MeetMeFitCallback) {
this.callback = callback
userId = callback.onGetUserId()
userDatabase = callback.onGetUserDatabase()
chatDatabase = callback.getChatDatabase()
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_swipe, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
userDatabase.child(userId).addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
}
override fun onDataChange(p0: DataSnapshot) {
val user = p0.getValue(User::class.java)
preferredGender = user?.preferredGender
userName = user?.name
location = user?.location
imageUrl = user?.imageUrl
populateItems()
}
})
//Create adapter and start displaying elements on the screen
cardsAdapter = CardsAdapter(context, R.layout.item, rowItems)
frame.adapter = cardsAdapter
frame.setFlingListener(object : SwipeFlingAdapterView.onFlingListener {
override fun removeFirstObjectInAdapter() {
rowItems.removeAt(0)
cardsAdapter?.notifyDataSetChanged()
}
override fun onLeftCardExit(p0: Any?) {
var user = p0 as User
userDatabase.child(user.uid.toString()).child(DATA_SWIPES_LEFT).child(userId)
.setValue(true)
}
override fun onRightCardExit(p0: Any?) {
val selectedUser = p0 as User
val selectedUserId = selectedUser.uid
if (!selectedUserId.isNullOrEmpty()) {
userDatabase.child(userId).child(DATA_SWIPES_RIGHT)
.addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
}
override fun onDataChange(p0: DataSnapshot) {
if (p0.hasChild(selectedUserId)) {
Toast.makeText(context, "Match! You can now chat!", Toast.LENGTH_SHORT).show()
//Key Generation for Chat Database
val chatKey = chatDatabase.push().key
if (chatKey != null) {
userDatabase.child(userId).child(DATA_SWIPES_RIGHT)
.child(selectedUserId).removeValue()
userDatabase.child(userId).child(DATA_MATCHES)
.child(selectedUserId).setValue(chatKey)
userDatabase.child(selectedUserId).child(DATA_MATCHES)
.child(userId).setValue(chatKey)
chatDatabase.child(chatKey).child(userId).child(DATA_NAME)
.setValue(userName)
chatDatabase.child(chatKey).child(userId)
.child(DATA_IMAGE_URL).setValue(imageUrl)
chatDatabase.child(chatKey).child(selectedUserId)
.child(DATA_NAME).setValue(selectedUser.name)
chatDatabase.child(chatKey).child(selectedUserId)
.child(DATA_IMAGE_URL).setValue(selectedUser.imageUrl)
}
} else {
userDatabase.child(selectedUserId).child(DATA_SWIPES_RIGHT)
.child(userId).setValue(true)
}
}
})
}
}
override fun onAdapterAboutToEmpty(p0: Int) {
}
override fun onScroll(p0: Float) {
}
})
frame.setOnItemClickListener { position, data -> }
likeButton.setOnClickListener {
if (!rowItems.isEmpty()) {
frame.topCardListener.selectRight()
}
}
dislikeButton.setOnClickListener {
if (!rowItems.isEmpty()) {
frame.topCardListener.selectLeft()
}
}
}
fun populateItems() {
noUsersLayout.visibility = View.GONE
progressLayout.visibility = View.VISIBLE
val cardsQuery = userDatabase.orderByChild(DATA_LOCATION).equalTo(location)
//.also{ userDatabase.orderByChild(DATA_GENDER).equalTo(preferredGender) }
cardsQuery.addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
}
override fun onDataChange(p0: DataSnapshot) {
p0.children.forEach { child ->
val user = child.getValue(User::class.java)
// if (user != null ) {
// val cardsQuery1 = userDatabase.orderByChild(DATA_GENDER).equalTo(preferredGender)
// cardsQuery1.addListenerForSingleValueEvent( object : ValueEventListener{
// override fun onCancelled(p0: DatabaseError) {
//
// }
// override fun onDataChange(p0: DataSnapshot) {
var showUser = true
if (child.child(DATA_SWIPES_LEFT).hasChild(userId) ||
child.child(DATA_SWIPES_RIGHT).hasChild(userId) ||
child.child(DATA_MATCHES).hasChild(userId)){
showUser = false
}
if (showUser) {
rowItems.add(user!!)
cardsAdapter?.notifyDataSetChanged()
}
//}
progressLayout.visibility = View.GONE
if (rowItems.isEmpty()) {
noUsersLayout.visibility = View.VISIBLE
}
}
}
})
}
}][1]