Android shape、selector的使用

首先在res下新建文件夹drawable，然后创建Android XML File

1.四个角圆角、填充白色、描边灰色

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <!-- 填充的颜色 -->
    <solid android:color="#ffffff" />
    <!-- android:radius 弧形的半径 -->
    <corners
       android:radius="10dp" />
    <!-- 描边 -->
    <stroke
        android:width="1dp"
        android:color="#f8f8f8" />

</shape>
</span>

2.右边不需要描边(那条边不需要描边，只需将right改成相应的边)

<span style="font-size:14px;">
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item android:right="-5dp">
        <shape>
            <solid android:color="#5c5c5c" />

            <stroke
                android:width="2dp"
                android:color="#ff8840" />

           
        </shape>
    </item>

</layer-list>
</span>

3.点击更换背景颜色

<span style="font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="false"><shape android:shape="rectangle">
            <solid android:color="#ffffff" />

            <corners android:radius="8dp" />
        </shape></item>
    <item android:state_pressed="true"><shape android:shape="rectangle">
            <solid android:color="#000000" />

            <corners android:radius="8dp" />
        </shape></item>

</selector>
</span>