加载布局的时候，老是报threadid=1: thread exiting with uncaught exception (group=0x41634c50)
报错原因：
<Button
android: 写成了：
selector_button_color.xml 如下：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:andro/>
</selector>
主要错误在红色标注地方，正确写法是：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:andro/>
</selector>
button_text_disable_color 、button_text_normal_color、button_text_pressed_color 在colors.xml里面定义
<color name="button_disable_color">#ffffffff</color>
<color name="button_normal_color">#88ffffff</color>
<color name="button_pressed_color">#ffffff</color>