Android形状边框与渐变

Question

我想为linearLayout创建一个边框.所以我决定创造一个形状.我希望边框有一个渐变.以下不是这样做的.它填充矩形,然后创建笔画.我不想要一个填充的矩形,只需要一个笔画.我想将渐变应用于笔画.

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <gradient
        android:angle="360"
        android:centerColor="#e95a22"
        android:endColor="#ff00b5"
        android:gradientRadius="360"
        android:startColor="#006386"
        android:type="sweep" />

    <stroke
        android:width="2dp"
        android:color="#ff207d94" />

</shape>

Answer 1

尝试这样的事情:

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item>
        <shape android:shape="rectangle" >
            <gradient
                android:angle="360"
                android:centerColor="#e95a22"
                android:endColor="#ff00b5"
                android:gradientRadius="360"
                android:startColor="#006386"
                android:type="sweep" />

            <stroke
                android:width="2dp"
                android:color="#ff207d94" />
        </shape>
    </item>
    <item
        android:bottom="2dp"
        android:left="2dp"
        android:right="2dp"
        android:top="2dp">
        <shape android:shape="rectangle" >
            <solid android:color="#fff" />
        </shape>
    </item>

</layer-list>

Answer 2

因为接受的答案不能完全按照我希望它为我工作,我也会发布我的解决方案,也许它可以帮助别人:)

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<item>
<!-- create gradient you want to use with the angle you want to use -->
    <shape android:shape="rectangle" >
        <gradient
            android:angle="0"
            android:centerColor="@android:color/holo_blue_bright"
            android:endColor="@android:color/holo_red_light"
            android:startColor="@android:color/holo_green_light" />

    </shape>
</item>
<!-- create the stroke for top, left, bottom and right with the dp you want -->
<item
    android:bottom="2dp"
    android:left="2dp"
    android:right="2dp"
    android:top="2dp">
    <shape android:shape="rectangle" >
        <!-- fill the inside in the color you want (could also be a gradient again if you want to, just change solid to gradient and enter angle, start, maybe center, and end color) -->
        <solid android:color="#fff" />
    </shape>
</item>

</layer-list>

Answer 3

这将创建一个顶部边框为 2dp 的布局。只需将其设置为布局的背景即可

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <gradient
                android:startColor="#4fc949"
                android:centerColor="#0c87c5"
                android:endColor="#b4ec51"
                android:angle="180" />
        </shape>
    </item>
    <item android:top="2dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/background_color"/>
        </shape>
    </item>
</layer-list>