android - 仅按钮左侧的边框

Question

这是我的 button_style.xml，我将其包含在我的按钮中。但是，我似乎仍然无法获得左侧的边框。有人可以帮我吗？

ps - 我的背景应该是透明的

<?xml version="1.0" encoding="utf-8"?>
<selector  xmlns:android="http://schemas.android.com/apk/res/android" >
    <layer-list>
            <item android:left="2dp">
                <shape android:shape="rectangle"> 
                    <stroke
                        android:width="1dp"
                        android:color="#999999"/>
                </shape>
        </item>
    </layer-list>

</selector>

Answer 1

试试这个

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

    <item>
        <shape android:shape="rectangle" >
            <solid android:color="@android:color/transparent" />
        </shape>
    </item>
    <item
        android:bottom="-2dp"
        android:right="-2dp"
        android:top="-2dp">
        <shape>
            <solid android:color="@android:color/transparent" />

            <stroke
                android:width="2dp"
                android:color="#FFF" />
        </shape>
    </item>

</layer-list>