android – 如何在可绘制的形状XML选择器中创建底部边框？

我正在尝试为我的按钮创建一个具有不同状态的可绘制形状.所以我写了这个：

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" android:color="@android:color/black" >
    <shape android:shape="rectangle" >
        <solid android:color="@color/NEGATIVE_pressed" />
        <stroke
            android:width="1dp"
            android:color="@color/ORANGE" />
        <corners android:radius="4dp" />
    </shape>
</item>
<item android:state_focused="true" android:color="@android:color/black" >
    <shape android:shape="rectangle" >
        <solid android:color="@color/NEGATIVE_focused" />
        <stroke
            android:width="1dp"
            android:color="@color/ORANGE" />
        <corners android:radius="4dp" />
    </shape>
</item>
<item android:color="@android:color/black" >
    <shape android:shape="rectangle" >
        <solid android:color="@color/NEGATIVE" />
        <stroke
            android:width="1dp"
            android:color="@color/NEGATIVE" />
        <corners android:radius="4dp" />
    </shape>
</item>
</selector>

然后在我的按钮中我用它作为android：background =“@ drawable / btn_negative_selector”

但是,我想绘制一个底部边框到那个形状,就像3 dp和不同颜色,但我无法弄清楚如何做到这一点.我试过搜索,但找不到适合选择器的东西.有什么建议吗？

解决方法:

首先,我将形状分开,以便更容易管理.

这是你的btn_negative_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@xml/rectangle_button_pressed" android:state_pressed="true"></item>
    <item android:drawable="@xml/rectangle_button_focused" android:state_focused="true"></item>
    <item android:drawable="@xml/rectangle_button" ></item>
</selector>

在res中创建名为’xml’的文件夹并将这些形状保存到其中：

1)rectangle_button_pressed：

    <shape xmlns:android="http://schemas.android.com/apk/res/android" 
android:shape="rectangle" >
        <solid android:color="@color/NEGATIVE_pressed" />
        <stroke
            android:width="1dp"
            android:color="@color/ORANGE" />
        <corners android:radius="4dp" />
    </shape>

2)rectangle_button_focused：

    <shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
        <solid android:color="@color/NEGATIVE_focused" />
        <stroke
            android:width="1dp"
            android:color="@color/ORANGE" />
        <corners android:radius="4dp" />
    </shape>

3)通过使用< layer-list>定义形状,这个rec​​tangle_button.xml将在其底部有一个边框.第一个< item>是底层和最后< item>是顶层.

<?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="@color/gray"/>
            <corners android:radius="4dp"/>
        </shape>
    </item>
    <item android:bottom="3dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/orange" />
            <corners android:radius="4dp"/>
        </shape>

    </item>
</layer-list>

标签：android,xml-drawable,drawable,shapedrawable
来源： https://codeday.me/bug/20191007/1869427.html