Fragment 中的 Bottomsheet 抛出空指针异常
Bottomsheet in Fragment throwing null pointer exception
我正在将 Tablayout 与 Viewpager 一起使用。我也试过在 OnCreateview 中调用 bottomsheetbehavior 但它没有用。 bottomsheet 是否仅适用于活动？我必须做些什么才能使 bottomsheet 正常工作。我过去两个小时一直在处理这个问题并搜索了解决方案，但找不到任何解决方案。
FragmentConv.kt
已更新
class FragmentConversation : Fragment() {
lateinit var conversationAdapter: ConversationAdapter
lateinit var list: ArrayList<TestingModel>
lateinit var bottomSheetBehavior: BottomSheetBehavior<RelativeLayout>
lateinit var listmodel2:ArrayList<TestingModel2>
lateinit var languageAdapter: LanguageAdapter
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
val v = inflater.inflate(R.layout.fragment_conversation, container, false)
Log.d("FragmentConverssation", "onCreateView: OnCreateView Called of Conversation")
val recylerview = v.findViewById<RecyclerView>(R.id.recylerviewConvo)
bottomSheetBehavior=BottomSheetBehavior.from(bottomSheet)
//#3 Listening to State Changes of BottomSheet
// bottomSheetBehavior.addBottomSheetCallback(object :BottomSheetBehavior.BottomSheetCallback(){
// override fun onStateChanged(bottomSheet: View, newState: Int) {
//// if (newState == BottomSheetBehavior.STATE_DRAGGING) {
//// bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED;
//// }
// }
//
// override fun onSlide(bottomSheet: View, slideOffset: Float) {
//
// }
// })
// val sender_btn=v.findViewById<ImageView>(R.id.sender_btn)
// val receiver_btn=v.findViewById<ImageView>(R.id.receiver_btn)
//
// sender_btn.setOnClickListener {
//
// list.add(TestingModel("sender","From sender"))
//
// conversationAdapter.notifyDataSetChanged()
// recylerview.smoothScrollToPosition(recylerview.bottom)
// }
recylerview.layoutManager =
LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
recylerview.hasFixedSize()
conversationAdapter = ConversationAdapter(createModel(), requireContext())
recylerview.adapter=conversationAdapter
bottomSheetEvents()
return v
}
fun createModel(): ArrayList<TestingModel> {
list = ArrayList()
list.add(TestingModel("sender", "Hi How are you"))
list.add(TestingModel("receiver", "I am fine"))
list.add(TestingModel("sender", "What's going on"))
return list
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
fun bottomSheetEvents(){
val recyclerView=bottomSheet.findViewById<RecyclerView>(R.id.recylerviewlang)
recyclerView.layoutManager=LinearLayoutManager(requireContext(),RecyclerView.VERTICAL,false)
recyclerView.hasFixedSize()
listmodel2= ArrayList()
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
languageAdapter= LanguageAdapter(listmodel2,requireContext())
recyclerView.adapter=languageAdapter
}
}
fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_alignParentTop="true"
android:layout_marginBottom="20dp"
>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recylerviewConvo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
<include layout="@layout/language_bottomsheet"
android:id="@+id/bottomSheet1"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
bottomsheet.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottomSheet"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:behavior_peekHeight="50dp"
app:behavior_hideable="true"
android:elevation="20sp"
android:background="@color/colorWhite"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Languages"
android:id="@+id/textlang"
android:layout_marginTop="10dp"
android:layout_marginLeft="5dp"/>
<androidx.recyclerview.widget.RecyclerView
android:layout_marginStart="5dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recylerviewlang"
android:layout_marginTop="40dp"
android:orientation="vertical"/>
</RelativeLayout>
StackTrace 已更新
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.googletranslator, PID: 6719
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.view.View.getLayoutParams()' on a null object reference
at com.google.android.material.bottomsheet.BottomSheetBehavior.from(BottomSheetBehavior.java:1632)
at com.example.googletranslator.Fragments.FragmentConversation.onCreateView(FragmentConversation.kt:44)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2698)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:310)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1185)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1354)
at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1432)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1495)
at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2167)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1990)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1945)
at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1816)
at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:303)
at androidx.fragment.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:238)
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:25466)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:25466)
at androidx.drawerlayout.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:146)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:747)
at android.view.View.measure(View.java:25466)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3397)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2228)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2486)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8171)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
E/AndroidRuntime: at android.view.Choreographer.doCallbacks(Choreographer.java:796)
at android.view.Choreographer.doFrame(Choreographer.java:731)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
bottomSheetBehavior 在 onCreateView() 中为空，因为您在 onViewCreated() 中初始化它，它在 onCreateView() 之后调用。
创建 bottomSheetBehavior 之前创建 bottomSheetBehavior 或稍后调用 bottomSheetBehavior.addBottomSheetCallback，在创建 bottomSheetBehavior 之后调用 bottomSheetBehavior.addBottomSheetCallback。
更新：bottomSheet 对象在 BottomSheetBehavior.from(bottomSheet) 中为空。
我通过从我的片段布局中排除 include 标签简单地解决了这个问题。然后我直接使用 bottomsheet layout xml 作为 Coordinator layout.
的子布局
我正在将 Tablayout 与 Viewpager 一起使用。我也试过在 OnCreateview 中调用 bottomsheetbehavior 但它没有用。 bottomsheet 是否仅适用于活动？我必须做些什么才能使 bottomsheet 正常工作。我过去两个小时一直在处理这个问题并搜索了解决方案，但找不到任何解决方案。
FragmentConv.kt
已更新
class FragmentConversation : Fragment() {
lateinit var conversationAdapter: ConversationAdapter
lateinit var list: ArrayList<TestingModel>
lateinit var bottomSheetBehavior: BottomSheetBehavior<RelativeLayout>
lateinit var listmodel2:ArrayList<TestingModel2>
lateinit var languageAdapter: LanguageAdapter
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
val v = inflater.inflate(R.layout.fragment_conversation, container, false)
Log.d("FragmentConverssation", "onCreateView: OnCreateView Called of Conversation")
val recylerview = v.findViewById<RecyclerView>(R.id.recylerviewConvo)
bottomSheetBehavior=BottomSheetBehavior.from(bottomSheet)
//#3 Listening to State Changes of BottomSheet
// bottomSheetBehavior.addBottomSheetCallback(object :BottomSheetBehavior.BottomSheetCallback(){
// override fun onStateChanged(bottomSheet: View, newState: Int) {
//// if (newState == BottomSheetBehavior.STATE_DRAGGING) {
//// bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED;
//// }
// }
//
// override fun onSlide(bottomSheet: View, slideOffset: Float) {
//
// }
// })
// val sender_btn=v.findViewById<ImageView>(R.id.sender_btn)
// val receiver_btn=v.findViewById<ImageView>(R.id.receiver_btn)
//
// sender_btn.setOnClickListener {
//
// list.add(TestingModel("sender","From sender"))
//
// conversationAdapter.notifyDataSetChanged()
// recylerview.smoothScrollToPosition(recylerview.bottom)
// }
recylerview.layoutManager =
LinearLayoutManager(requireContext(), RecyclerView.VERTICAL, false)
recylerview.hasFixedSize()
conversationAdapter = ConversationAdapter(createModel(), requireContext())
recylerview.adapter=conversationAdapter
bottomSheetEvents()
return v
}
fun createModel(): ArrayList<TestingModel> {
list = ArrayList()
list.add(TestingModel("sender", "Hi How are you"))
list.add(TestingModel("receiver", "I am fine"))
list.add(TestingModel("sender", "What's going on"))
return list
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
fun bottomSheetEvents(){
val recyclerView=bottomSheet.findViewById<RecyclerView>(R.id.recylerviewlang)
recyclerView.layoutManager=LinearLayoutManager(requireContext(),RecyclerView.VERTICAL,false)
recyclerView.hasFixedSize()
listmodel2= ArrayList()
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
listmodel2.add(TestingModel2("Urdu","ur"))
languageAdapter= LanguageAdapter(listmodel2,requireContext())
recyclerView.adapter=languageAdapter
}
}
fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_alignParentTop="true"
android:layout_marginBottom="20dp"
>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recylerviewConvo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:orientation="vertical"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
<include layout="@layout/language_bottomsheet"
android:id="@+id/bottomSheet1"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
bottomsheet.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottomSheet"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:behavior_peekHeight="50dp"
app:behavior_hideable="true"
android:elevation="20sp"
android:background="@color/colorWhite"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Languages"
android:id="@+id/textlang"
android:layout_marginTop="10dp"
android:layout_marginLeft="5dp"/>
<androidx.recyclerview.widget.RecyclerView
android:layout_marginStart="5dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recylerviewlang"
android:layout_marginTop="40dp"
android:orientation="vertical"/>
</RelativeLayout>
StackTrace 已更新
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.googletranslator, PID: 6719
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.ViewGroup$LayoutParams android.view.View.getLayoutParams()' on a null object reference
at com.google.android.material.bottomsheet.BottomSheetBehavior.from(BottomSheetBehavior.java:1632)
at com.example.googletranslator.Fragments.FragmentConversation.onCreateView(FragmentConversation.kt:44)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2698)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:310)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1185)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1354)
at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1432)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1495)
at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2167)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1990)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1945)
at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1816)
at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:303)
at androidx.fragment.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:238)
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:25466)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:25466)
at androidx.drawerlayout.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:146)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:747)
at android.view.View.measure(View.java:25466)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3397)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2228)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2486)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8171)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
E/AndroidRuntime: at android.view.Choreographer.doCallbacks(Choreographer.java:796)
at android.view.Choreographer.doFrame(Choreographer.java:731)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
bottomSheetBehavior 在 onCreateView() 中为空，因为您在 onViewCreated() 中初始化它，它在 onCreateView() 之后调用。
创建 bottomSheetBehavior 之前创建 bottomSheetBehavior 或稍后调用 bottomSheetBehavior.addBottomSheetCallback，在创建 bottomSheetBehavior 之后调用 bottomSheetBehavior.addBottomSheetCallback。
更新：bottomSheet 对象在 BottomSheetBehavior.from(bottomSheet) 中为空。
我通过从我的片段布局中排除 include 标签简单地解决了这个问题。然后我直接使用 bottomsheet layout xml 作为 Coordinator layout.
的子布局