Android 设置圆角按下改变颜色按钮

<?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" >
<!-- 填充的颜色 -->
<solid android:color="#46A3FF"></solid>
<!-- 设置按钮的四个角为弧形 -->
<!-- android:radius 弧形的半径 -->
<corners android:radius="15dip" />
<!-- padding：Button里面的文字与Button边界的间隔 -->
<padding android:bottom="2dp" android:left="2dp" android:right="2dp" android:top="2dp" />
</shape>
</item>
<item android:state_pressed="true">
<shape android:shape="rectangle">
<solid android:color="#0072E3" />
<corners android:radius="15dip" />
</shape>
</item>
</selector>