CardView没有出现在Android的大号阴影 [英] CardView not showing Shadow in Android L
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问题描述
我的内部列表视图Cardview没有显示在Android的大号阴影（Nexus的5）。另外，圆边不能正常显示。这里是$ C $下ListView的适配器查看：
My Cardview inside Listview is not showing shadow in Android L(Nexus 5). Also the round edges are not properly shown. Here is the code for Listview's Adapter View :
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res/com.example.myapp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardBackgroundColor="@android:color/white"
android:foreground="?android:attr/selectableItemBackground"
app:cardCornerRadius="4dp"
app:cardElevation="4dp" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="@dimen/padding_small"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ImageView
android:id="@+id/ivPicture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tvName"
android:layout_centerHorizontal="true"
android:scaleType="fitCenter" />
<TextView
android:id="@+id/tvDetail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/ivPicture"
android:layout_centerHorizontal="true"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin" />
</RelativeLayout>
</android.support.v7.widget.CardView>
和ListView的XML：
And the ListView xml :
<RelativeLayout 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/com.example.myapp"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/app_bg" >
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:cacheColorHint="#00000000"
android:divider="@android:color/transparent"
android:drawSelectorOnTop="true"
android:smoothScrollbar="true" />
<ProgressBar
android:id="@+id/progressBarMain"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="gone" /></RelativeLayout>
它的工作原理罚款preL器件具有适当的阴影和圆角。但不工作AON大号的Android设备。你能告诉我在这里失踪了什么？
It works fine on pre-L devices with proper shadow and rounded corners. But not working aon Android L device. Can you tell what i am missing here?
推荐答案
最后，我能够加入缘至cardview获得棒棒糖设备上的阴影。这是最后的cardview布局：
Finally i was able to get shadows on Lollipop device by adding margin to the cardview. Here is the final cardview layout :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res/com.example.myapp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardBackgroundColor="@android:color/white"
android:foreground="?android:attr/selectableItemBackground"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginRight="@dimen/activity_horizontal_margin"
android:layout_marginTop="@dimen/padding_small"
android:layout_marginBottom="@dimen/padding_small"
app:cardCornerRadius="4dp"
app:cardElevation="4dp" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="@dimen/padding_small"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ImageView
android:id="@+id/ivPicture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tvName"
android:layout_centerHorizontal="true"
android:scaleType="fitCenter" />
<TextView
android:id="@+id/tvDetail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/ivPicture"
android:layout_centerHorizontal="true"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin" />
</RelativeLayout>
这篇关于CardView没有出现在Android的大号阴影的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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