我无法将底部的shee对话框片段扩展到屏幕顶部。如果我将layout_height（用于测试）设置为某个较低的值，它总是占屏幕的60%或更少。我已经尝试将其设置为600，700，800（目前为900dp），它仍然没有高于下面的截图（有4个textview只是为了测试，它们在屏幕上不可见）：
60% bottom sheet
我的底部工作表片段XML：

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/mainLayotCoordinator"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentTop="true"
    android:layout_gravity="fill_vertical"
    android:fitsSystemWindows="true"
    app:layout_anchorGravity="top">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/mainLayoutConstraint"
        android:layout_width="match_parent"
        android:layout_height="900dp"
        android:fitsSystemWindows="false"
        app:layout_anchorGravity="top"
        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

        <com.safetyheads.akademiaandroida.MyTest2View
            android:id="@+id/myTest2View"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:hint="type something"
            app:layout_constraintBottom_toTopOf="@+id/textView4"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:name="First nameno"
            app:visibility="0">

        </com.safetyheads.akademiaandroida.MyTest2View>

        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/myTest2View" />

        <TextView
            android:id="@+id/textView5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.503"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView4" />

        <TextView
            android:id="@+id/textView7"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView5" />

        <TextView
            android:id="@+id/textView8"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.503"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView7" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

我的底部工作表对话框片段类：

import android.annotation.SuppressLint
import android.app.Dialog
import android.content.DialogInterface
import android.os.Bundle
import android.util.DisplayMetrics
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.FrameLayout
import androidx.annotation.Nullable
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.coordinatorlayout.widget.CoordinatorLayout
import com.google.android.material.bottomsheet.BottomSheetBehavior
import com.google.android.material.bottomsheet.BottomSheetDialog
import com.google.android.material.bottomsheet.BottomSheetDialogFragment
import com.safetyheads.akademiaandroida.databinding.FragmentBottomSheetWriteToUsBinding

class BottomSheetWriteToUsFragment :BottomSheetDialogFragment() {

    private lateinit var binding: FragmentBottomSheetWriteToUsBinding

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = FragmentBottomSheetWriteToUsBinding.inflate(inflater, container, false)
        return binding.root
    }

    @SuppressLint("ResourceType")
    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val bottomSheetDialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog
        bottomSheetDialog.setOnShowListener { dialog: DialogInterface ->
            val bottomSheet = (dialog as BottomSheetDialog).findViewById<ConstraintLayout>(R.id.mainLayoutConstraint)
            if (bottomSheet != null) BottomSheetBehavior.from(bottomSheet).state = BottomSheetBehavior.STATE_EXPANDED
        }
        return bottomSheetDialog
    }
}

有一些代码从一个解决方案，我发现与bottomsheetbehavior.state_expanded，但它不是使我的bottom表去顶部，因为我的预期。
我可以手动拖动它，然后它是在全屏。
有没有人，请帮助我，使底部工作表对话框片段去到屏幕的顶部（如fulscreen）自动打开后？