无法设置 BottomSheetDialog 初始高度

Question

我正在尝试设置对话框必须从其开始的高度窥视，然后用户如果被拖动应该能够展开它，问题是在任何情况下 bottomsheet 初始状态都会占据屏幕的一半。

BottomSheet 如下所示：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/varianti_preferite_bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:elevation="8dp"
    app:behavior_peekHeight="200dp"
    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

    <ImageButton
        android:id="@+id/closeButton"
        style="@style/Widget.AppCompat.ImageButton"
        android:minWidth="75dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/bottom_border_radius"
        android:contentDescription="@string/bottom_sheet_close_button"
        android:padding="10dp"
        android:layout_marginBottom="16dp"
        app:srcCompat="@drawable/ic_baseline_close" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/variantiRecycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="16dp"
        android:clipToPadding="false"
        android:scrollbars="vertical"
        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
        app:spanCount="4"
        tools:listitem="@layout/varianti_preferite">

    </androidx.recyclerview.widget.RecyclerView>


</LinearLayout>

我尝试过的：

我尝试覆盖 onCreateDialog 并手动设置 HalfExpanded 比率，但没有任何改变：

   @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        BottomSheetDialog dialog = (BottomSheetDialog) super.onCreateDialog(savedInstanceState);

        dialog.setOnShowListener(dialog1 -> {
            BottomSheetDialog d = (BottomSheetDialog) dialog1;

            FrameLayout bottomSheet = (FrameLayout) d.findViewById(com.google.android.material.R.id.design_bottom_sheet);
            BottomSheetBehavior<FrameLayout> bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
            bottomSheetBehavior.setHalfExpandedRatio(0.2f);
            bottomSheetBehavior.setFitToContents(false);

        });

        return dialog;
    }

也欢迎 Kotlin 回答。

Answer 1

我已经通过在 BottomSheet 样式中设置 peek 高度解决了这个问题。

所以在style.xml

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">        
   <item name="bottomSheetDialogTheme">@style/AppBottomSheetDialogTheme</item>
</style>

<style name="AppBottomSheetDialogTheme" parent="Theme.Design.Light.BottomSheetDialog">
    <item name="bottomSheetStyle">@style/AppModalStyle</item>
</style>

<style name="AppModalStyle" parent="Widget.Design.BottomSheet.Modal">
    <item name="android:background">@drawable/bottom_sheet_rounded</item>
    <item name="behavior_peekHeight">@dimen/peek_height</item>
</style>

在dimens.xml

<dimen name="peek_height">200dp</dimen>

但问题是它将 peek_height 设置为应用程序的所有 BottomSheets。

Answer 2

对我成功的方法：

在 onCreate 中添加 viewTreeObserver.addOnGlobalLayoutListener 以设置您的 BottomSheet 行为：

binding.root.viewTreeObserver.addOnGlobalLayoutListener {
    setupBottomSheetBehaviorForView(binding.bottomFragmentContainer)
}

设置行为：

private fun setupBottomSheetBehaviorForView(view: FragmentContainerView) {
    val behavior = BottomSheetBehavior.from(view)
    val screenHeight =
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            windowManager.currentWindowMetrics.bounds.height()
        } else {
            val metrics = DisplayMetrics()
            windowManager.defaultDisplay.getMetrics(metrics)
            metrics.heightPixels
        }

    val toolbarLocation = IntArray(COORDINATES_ARRAY_SIZE) // was added to avoid overlapping the toolbar
    binding.toolbar.getLocationOnScreen(toolbarLocation)   // with the bottom sheet (in case of full screen activity)

    behavior.apply {
        peekHeight = (screenHeight * BOTTOM_SHEET_PEEK_PERCENT).toInt()
        isFitToContents = false
        halfExpandedRatio = BOTTOM_SHEET_PEEK_PERCENT
        expandedOffset = toolbarLocation[1]  // it's optional
    }
}

其中 BOTTOM_SHEET_PEEK_PERCENT 是 Float const，初始 peek 高度的 40%：

const val BOTTOM_SHEET_PEEK_PERCENT = 0.40f

Answer 3

我也遇到过类似的问题，我的解决方案是设置 layoutParams

希望它也对你有用

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    viewBinding.apply {
        bottomSheetConstraintLayout.layoutParams.height = 
        resources.displayMetrics.heightPixels
    }
}

无法设置 BottomSheetDialog 初始高度

Unable to set BottomSheetDialog initial height

android

kotlin

android-bottomsheetdialog