我需要show()扩展的FAB并基于 bool 值hide()。我在扩展BottomSheetDialogFragment的 Bottom Sheet 中使用它。问题是，它在 Bottom Sheet 处于展开状态时有效，但在默认情况下在工作表打开状态下不起作用。我还观察到了一个奇怪的行为-默认情况下，FAB在工作表打开时显示，一秒钟后消失。我不确定是什么原因导致了这种现象。我尝试默认情况下隐藏FAB，但是它不起作用。
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_height="match_parent"
android:layout_width="match_parent">
<androidx.core.widget.NestedScrollView
android:layout_gravity="top"
android:layout_height="match_parent"
android:layout_width="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
tools:context=".ui.attendance.employee.selection.EmployeeSelectionBottomSheet">
<TextView
android:id="@+id/copy_to_emp_title"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="wrap_content"
android:paddingBottom="16dp"
android:text="@string/copy_to"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.ConstraintLayout
android:background="@color/palegrey"
android:id="@+id/copy_to_emp_search_cc"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="match_parent"
android:paddingBottom="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/copy_to_emp_title"
tools:visibility="visible">
<com.google.android.material.textfield.TextInputLayout
style="@style/TextInputLayoutAppearance"
android:hint="@string/enter_chip_txt"
android:id="@+id/copy_to_emp_search_til"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_width="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<HorizontalScrollView
android:id="@+id/copy_to_emp_hsv"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:scrollbars="none">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="503dp">
<com.google.android.material.chip.ChipGroup
android:id="@+id/copy_to_emp_cg"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
app:layout_constraintBottom_toBottomOf="@+id/copy_to_emp_et"
app:layout_constraintEnd_toStartOf="@+id/copy_to_emp_et"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/copy_to_emp_et" />
<com.google.android.material.textfield.TextInputEditText
android:hint="@string/enter_chip_txt"
android:id="@+id/copy_to_emp_et"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/copy_to_emp_cg"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</HorizontalScrollView>
</com.google.android.material.textfield.TextInputLayout>
<TextView
style="@style/Body14Left4SemiBold"
android:id="@+id/copy_to_emp_filter"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="@string/filter"
app:layout_constraintBottom_toBottomOf="@+id/copy_to_emp_filter_icon"
app:layout_constraintStart_toStartOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toTopOf="@+id/copy_to_emp_filter_icon" />
<ImageView
android:id="@+id/copy_to_emp_filter_icon"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="wrap_content"
android:padding="3dp"
android:src="@{isFilterViewExpanded?@drawable/ic_arrow_up:@drawable/ic_arrow_down}"
app:layout_constraintEnd_toEndOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_search_til"
tools:src="@drawable/ic_arrow_down" />
<TextView
style="@style/Body14Left2Regular"
android:id="@+id/copy_to_emp_category_label"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="wrap_content"
android:text="@string/category"
app:layout_constraintStart_toStartOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_filter" />
<TextView
style="@style/Body14Left2Regular"
android:background="@drawable/rounded_rect_white_5"
android:id="@+id/copy_to_emp_category"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginTop="8dp"
android:layout_width="0dp"
android:padding="8dp"
android:text="@string/select_your_filter_category"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_category_label" />
<TextView
style="@style/Body14Left2Regular"
android:id="@+id/copy_to_emp_sub_category_label"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="wrap_content"
android:text="@string/sub_category"
app:layout_constraintStart_toStartOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_category" />
<TextView
style="@style/Body14Left2Regular"
android:background="@drawable/rounded_rect_white_5"
android:id="@+id/copy_to_emp_sub_category"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginTop="16dp"
android:layout_width="0dp"
android:padding="8dp"
android:text="@string/select_your_filter_sub_category"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/copy_to_emp_search_til"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_sub_category_label" />
<com.google.android.material.button.MaterialButton
android:id="@+id/copy_to_add_filter_btn"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="wrap_content"
android:text="Add Filter"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/copy_to_emp_sub_category" />
<androidx.constraintlayout.widget.Group
android:id="@+id/copy_to_emp_group"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:visibility="@{isFilterViewExpanded?View.VISIBLE:View.GONE}"
app:constraint_referenced_ids="copy_to_emp_sub_category,copy_to_emp_sub_category_label,copy_to_emp_category,copy_to_emp_category_label, copy_to_add_filter_btn"
tools:visibility="visible" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.chip.ChipGroup
android:id="@+id/copy_to_selected_filter_cg"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_width="0dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/copy_to_emp_search_cc" />
<TextView
android:id="@+id/copy_to_emp_count_tv"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:layout_width="wrap_content"
android:text="All Employee (264)"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/copy_to_selected_filter_cg" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/copy_to_rv"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:layout_width="match_parent"
android:minHeight="60dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/copy_to_emp_count_tv" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
android:backgroundTint="@color/blueberry"
android:id="@+id/copy_to_apply_changes_btn"
android:layout_gravity="bottom|center_horizontal"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_width="wrap_content"
android:text="Apply changes"
android:textColor="@color/whitetwo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
最佳答案
/>
</com.google.android.material.circularreveal.CircularRevealFrameLayout>
fab.isExpanded =!fab.isExpanded
}
关于android - 如何使扩展的 float 操作按钮显示在 Bottom Sheet 的底部？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/61078180/