卡片视图高程不显示

时间:2017-11-01 10:33:00

标签: android

这里有很多关于cardview提升的问题,我尝试了解决问题的所有解决方案,但它仍然无效。我添加了card_view:cardUseCompatPadding =" true"进入cardview,我也尝试在android清单中将硬件加速设置为true。我还读到,如果我在cardview中使用填充,它可能会切出卡片视图的阴影。谁能让我知道我做错了什么。我可以在android studio中看到阴影,但不能在模拟器或真实设备上看到阴影。

<?xml version="1.0" encoding="utf-8"?>

        <android.support.v7.widget.CardView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:card_view="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            xmlns:app="http://schemas.android.com/apk/res-auto"

            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="15dp"
            android:layout_marginTop="20dp"
            card_view:cardBackgroundColor="@android:color/white"
            card_view:cardCornerRadius="4dp"
            card_view:cardElevation="6dp"
            android:id="@+id/cardView"
            card_view:cardUseCompatPadding="true"
            >

            <android.support.constraint.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:padding="@dimen/horizontal_spacing">

                <ImageView
                    android:id="@+id/imageView"
                    android:layout_width="36dp"
                    android:layout_height="36dp"
                    android:layout_gravity="end"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:srcCompat="@drawable/aboutpallogo"/>

                <TextView
                    android:id="@+id/textView"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="16dp"
                    android:textSize="14dp"
                    android:textAppearance="@style/TextAppearance.AppCompat.Headline"
                    android:textColor="#171652"
                    android:textDirection="rtl"
                    app:layout_constraintBottom_toBottomOf="@+id/imageView"
                    app:layout_constraintEnd_toStartOf="@+id/imageView"
                    app:layout_constraintStart_toStartOf="parent"
                    tools:text="Header"/>

                <TextView
                    android:id="@+id/textView2"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:text="TextView"
                    android:textDirection="rtl"
                    android:textColor="#4cbea9"
                    app:layout_constraintEnd_toEndOf="@+id/textView"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/textView"/>

                <View
                    android:id="@+id/divider"
                    android:layout_width="0dp"
                    android:layout_height="1dp"
                    android:layout_marginTop="8dp"
                    android:background="@drawable/divider"
                    app:layout_constraintEnd_toEndOf="@+id/textView2"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/textView2"/>

                <com.mediamer.apps.pal_library.helpers.ExpandableTextView
                    android:id="@+id/expandableTextView"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="8dp"
                    android:layout_marginEnd="16dp"
                    android:layout_marginTop="24dp"
                    app:expanded="true"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="@+id/textView2"
                    app:layout_constraintEnd_toStartOf="@+id/imageView"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/divider"
                    />
            </android.support.constraint.ConstraintLayout>
        </android.support.v7.widget.CardView>

2 个答案:

答案 0 :(得分:0)

尝试放

android:elevation="6dp"

 <android.support.v7.widget.CardView

部分。此外,您如何使用此Cardview的信息可能很有用。

答案 1 :(得分:0)

请改用此代码:

 <android.support.v7.widget.CardView
            android:id="@+id/report_details_card"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:cardBackgroundColor="@color/colorWhite"
            app:cardCornerRadius="@dimen/cardview_default_radius"
            app:cardElevation="@dimen/cardview_default_elevation"
            app:cardUseCompatPadding="true">
</android.support.v7.widget.CardView>

您只需要替换

  card_view:cardCornerRadius="4dp"
  card_view:cardElevation="6dp"
  card_view:cardUseCompatPadding="true"

  app:cardUseCompatPadding="true"
  app:cardCornerRadius="4dp"
  app:cardElevation="6dp"

现在你很高兴。快乐的编码:)