背景选择器常见错误

1.button背景选择器必须加上形状:

<item android:state_pressed="true">        <shape android:shape="rectangle">            <solid android:color="#F39800"></solid>        </shape>    </item>    <item android:state_pressed="false">        <shape android:shape="rectangle">            <solid android:color="#D7D7D7"></solid>        </shape>    </item>

2.不加形状,会报错的

<item android:state_pressed="true" android:color="#D7D7D7"></item><item android:state_pressed="false" android:color="#97F765"></item>