button正常状态下为白底黑字黑边，点击状态下为黑底白字白边。

demo下载:

http://download.csdn.net/detail/zhufuing/6974387

//-----------------------------------------------------------------------------------------------------------------------------------------------------------------

由于下面的一句话引起的：

radio.setBackgroundResource(R.drawable.radiobtn_selector);

    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:color="@color/title" android:state_checked="true"></item>
        <item android:color="@color/title" android:state_pressed="true"></item>
        <item android:color="@color/white"></item>
    </selector>

报出：Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #3: <item> tag requires a 'drawable' attribute or child tag defining a drawable

改成如下：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <solid android:color="@color/title" />
            <stroke android:width="1dp" android:color="@color/white" />
            <corners android:radius="5dp" />
            <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" />
        </shape>
    </item>
    <item android:state_checked="true">
        <shape>
            <solid android:color="@color/title" />
            <stroke android:width="1dp" android:color="@color/white" />
            <corners android:radius="5dp" />
            <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" />
        </shape>
    </item>
    <item>
        <shape>
            <solid android:color="@color/white" />
            <stroke android:width="1dp" android:color="@color/white" />
            <corners android:radius="5dp" />
            <padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" />
        </shape>
    </item>
</selector>

原文链接：https://www.f2er.com/xml/295478.html