android - Material Cardview - child 未被剪裁 < API 28

Question

当将嵌套 ScrollView 放入带有圆角的 Material 卡 View 中并滚动时，会出现一个错误，即其他 Material 卡 View 不会被剪裁并且边缘会溢出圆角。 TextView 和 viewpager 对象到达那里的角落被剪裁得很好。此错误出现在 api 28 及以下。

有人知道解决这个问题的方法吗？

 <androidx.constraintlayout.widget.ConstraintLayout  xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/fragment_workout_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="framework.presentation.workouts.WorkoutFragment"
>

<com.google.android.material.appbar.AppBarLayout
    android:id="@+id/app_bar_workout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:contentInsetStart="0dp"
    app:elevation="0dp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <include
        android:id="@+id/toolbar_workout_navigation"
        layout="@layout/toolbar_home" />

</com.google.android.material.appbar.AppBarLayout>

<com.google.android.material.card.MaterialCardView
    style="@style/cv_style_all_rounded"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_marginBottom="@dimen/cv_margin_bottom"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/app_bar_workout"
    app:strokeColor="@color/dividerColor"
    app:strokeWidth="0.5dp">

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        android:overScrollMode="never"
        >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/home_header_image"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:adjustViewBounds="true"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:srcCompat="@drawable/home_header" />

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/home_title"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="32dp"
                android:layout_marginTop="@dimen/header_margin_top"
                android:layout_marginEnd="32dp"
                android:gravity="center"
                android:text="@string/home_title"
                android:textSize="?attr/textAppearanceHeadline5"
                android:textStyle="bold"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/home_header_image" />

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/home_description"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="32dp"
                android:layout_marginTop="@dimen/description_margin_top"
                android:layout_marginEnd="32dp"
                android:gravity="center"
                android:text="@string/home_description"
                android:textSize="?attr/textAppearanceHeadline6"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/home_title" />

            <View
                android:id="@+id/divider_home"
                android:layout_width="match_parent"
                android:layout_height="1dp"
                  android:layout_marginStart="@dimen/workout_intro_left_right_margin"
                android:layout_marginTop="@dimen/divider_margin_top"
                android:layout_marginEnd="@dimen/workout_intro_left_right_margin"
                android:background="?android:attr/dividerVertical"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/home_description" />

            <androidx.viewpager2.widget.ViewPager2
                android:id="@+id/quotesViewPager2"
                android:layout_width="0dp"
                android:layout_height="150dp"
                android:layout_marginStart="@dimen/start_end_padding"
                android:layout_marginTop="32dp"
                android:layout_marginEnd="@dimen/start_end_padding"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/divider_home" />

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/tvFeaturedVideo"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginTop="32dp"
                android:layout_marginEnd="16dp"
                android:text="@string/featured_video"
                android:textSize="?attr/textAppearanceHeadline6"
                android:textStyle="bold"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/quotesViewPager2" />

            <com.google.android.material.card.MaterialCardView
                android:id="@+id/cvFeaturedVideo"
                style="@style/cv_style_home_layout"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_marginStart="@dimen/start_end_padding"
                android:layout_marginTop="8dp"
                android:layout_marginEnd="@dimen/start_end_padding"
                android:clipChildren="true"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/tvFeaturedVideo">

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <ImageView
                        android:id="@+id/featuredThumbNail"
                        android:layout_width="0dp"
                        android:layout_height="210dp"
                        android:layout_marginBottom="12dp"
                        android:adjustViewBounds="false"
                        android:scaleType="centerCrop"
                        app:layout_constraintBottom_toTopOf="@+id/featuredVideoTitle"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                    <TextView
                        android:id="@+id/featuredVideoTitle"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="32dp"
                        android:layout_marginEnd="32dp"
                        android:layout_marginBottom="12dp"
                        android:maxLines="1"
                        android:text="TextView"
                        android:textAlignment="center"
                        android:textSize="18sp"
                        android:textStyle="bold"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintHorizontal_bias="0.0"
                        app:layout_constraintStart_toStartOf="parent" />

                    <ImageView
                        android:id="@+id/youtubeIcon"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        app:layout_constraintBottom_toBottomOf="@+id/featuredThumbNail"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:srcCompat="@drawable/youtube_logo_icon_150px" />
                </androidx.constraintlayout.widget.ConstraintLayout>
            </com.google.android.material.card.MaterialCardView>

重新创建的步骤:

约束布局> Material 卡 View (主容器)>嵌套 ScrollView >附加 Material 卡 View (足够滚动)& API 28及以下

Answer 1

在您的 Cardview 中，将属性添加到您的 xml 中:

cardPreventCornerOverlap="false"