文件预览：pressed_shape.xml

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" > <!-- 颜色填充方式绘画按钮 --> <solid android:color="?attr/colorPrimaryDark" /> <!-- 边框 --> <stroke android:width="2dp" android:color="?attr/colorPrimaryDark" /> <!-- 定义成圆角的 --> <corners android:radius="15dp" /> <!-- 颜色线性渐变方式绘画按钮 --> <!--<gradient android:angle="270" android:startColor="?attr/colorAccent" android:centerColor="?attr/colorPrimary" android:endColor="?attr/colorPrimaryDark"/> --> </shape>