带有圆角的Android CardView显示灰色角 [英] Android CardView with rounded corners displays grey corners

问题描述

我正在用CardView扩展自定义布局. 圆角将按预期显示，但在角后面也会显示灰色背景.

I'm inflating a custom layout with CardView inside the layout. The rounded corners are displayed as expected but I also get grey background behind the corners.

代码很简单，使用具有拐角半径和背景颜色的CardView. 我尝试设置透明背景，但是不起作用.但是，如果我设置了另一种不透明颜色，它将显示在角落.

The code is simple, uses a CardView with corner radius and a background color. I've tried setting transparent background but doesn't work. However, if i set another opaque color, it is displayed in corners.

已附加代码.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardBackgroundColor="@android:color/white"
        app:cardCornerRadius="6dp"
        app:cardElevation="5dp">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/transparent">

            <TextView
                android:id="@+id/tvProgress"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:layout_toLeftOf="@+id/ivIcon"
                android:layout_toStartOf="@+id/ivIcon"
                android:background="@android:color/transparent"
                android:padding="@dimen/elementPaddingSmall"
                android:text="Initial Discussion"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="@android:color/black" />

            <ImageView
                android:id="@+id/ivIcon"
                android:layout_width="50dp"
                android:layout_height="50dp"
                android:layout_alignParentEnd="true"
                android:layout_alignParentRight="true"
                android:background="@color/lightBrown"
                android:scaleType="centerInside"
                android:src="@drawable/ic_checkmark_circle" />
        </RelativeLayout>


    </android.support.v7.widget.CardView>
</RelativeLayout>

结果:

推荐答案

由于阴影，您需要在cardview中留出空间以显示完整的阴影.将android:layout_margin="5dp"添加到 CardView ，您将看到灰色"颜色是阴影.

It is because of shadow, you need to give space to cardview to show full shadow. Add android:layout_margin="5dp" to CardView and you will see that the "grey" color is cut shadow.

解决方案正在向CardView添加app:cardUseCompatPadding="true"，它将提供所需的间距.

Solution is adding app:cardUseCompatPadding="true" to CardView and it will give needed spacing.

这篇关于带有圆角的Android CardView显示灰色角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！