海拔在 PopupWindow 中不起作用 Android

Question

我在我的 android 应用程序中使用 PopupWindow，它工作正常。但是我必须向它添加 elevation 但它不起作用。这是我的做法

要在弹出窗口中显示的视图 window popup_view_order_status

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/white"
    android:layout_margin="@dimen/margin_xlarge"
    android:elevation="@dimen/margin_large"
    android:padding="@dimen/margin_large">


    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="@dimen/text_large"
        android:textColor="@color/dark_gray"
        android:textStyle="bold"
        android:text="@string/lbl_order_status" />

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <RadioButton
            android:id="@+id/rbAccepted"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layoutDirection="rtl"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:minHeight="@dimen/text_xxlarge_m"
            android:text="@string/lbl_accepted"
            android:textSize="@dimen/text_large"
            android:onClick="onRadioButtonClicked"/>

        <RadioButton
            android:id="@+id/rbRejected"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layoutDirection="rtl"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:minHeight="@dimen/text_xxlarge_m"
            android:text="@string/lbl_rejected"
            android:textSize="@dimen/text_large"
            android:onClick="onRadioButtonClicked"/>

        <RadioButton
            android:id="@+id/rbOutForDelivery"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layoutDirection="rtl"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:minHeight="@dimen/text_xxlarge_m"
            android:text="@string/lbl_out_for_delivery"
            android:textSize="@dimen/text_large"
            android:onClick="onRadioButtonClicked"/>

        <RadioButton
            android:visibility="gone"
            android:id="@+id/rbReadyForPickup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layoutDirection="rtl"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:minHeight="@dimen/text_xxlarge_m"
            android:text="@string/lbl_ready_for_pickup"
            android:textSize="@dimen/text_large"
            android:onClick="onRadioButtonClicked"/>


        <RadioButton
            android:id="@+id/rbCompleted"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layoutDirection="rtl"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:minHeight="@dimen/text_xxlarge_m"
            android:text="@string/lbl_completed"
            android:textSize="@dimen/text_large"
            android:onClick="onRadioButtonClicked"/>

    </RadioGroup>
</LinearLayout>

这是我在 activity

中的设置方式

    val inflater = getSystemService(LAYOUT_INFLATER_SERVICE) as LayoutInflater
    val popupView: View = inflater.inflate(R.layout.popup_view_order_status, null)
    val width = LinearLayout.LayoutParams.WRAP_CONTENT
    val height = LinearLayout.LayoutParams.WRAP_CONTENT
    val focusable = true // lets taps outside the popup also dismiss it
    val popupWindow = PopupWindow(popupView, width, height, focusable)
    popupWindow.showAtLocation(binding.btnOrderStatusChange, Gravity.RIGHT, 50, -binding.btnOrderStatusChange.measuredHeight / 2)
    popupWindow.setBackgroundDrawable(ColorDrawable(Color.WHITE))
    popupWindow.elevation = 120F

Answer 1

我会尝试以下操作：

使用 CardView 作为您的内容根 View，它具有 cardElevation 用于自定义阴影的属性。

请记住，为了使 CardView 阴影可见，您必须为其添加一些边距，并且要使边距可见，您必须再添加一个 View 来包裹 CardView，你可以使用 LinearLayout 或 FrameLayout.

调用popupWindow.setBackgroundDrawable(null)删除内置背景。

演示：https://www.youtube.com/watch?v=rlWX4kIDI6Q

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