首先创建两个按下和弹起的button圆角资源文件
//circle_btn_normal.xml
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <!-- 设置圆角 --> <corners android:radius="6dp" > </corners> <!-- 设置填充色 --> <solid android:color="@color/ActionBar" > </solid> <padding android:bottom="2dp" android:left="2dp" android:right="2dp" android:top="2dp" /> <!-- 设置边框的颜色和宽度 --> <stroke android:width="1dp" android:color="@color/ActionBar" > </stroke> </shape>
//circle_btn_pressed.xml
<?xml version="1.0" encoding="utf-8"?> <!-- shape如果不声明形状默认是正方形 --> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <!-- 设置圆角 --> <corners android:radius="6dp" > </corners> <!-- 设置填充色 --> <solid android:color="@color/gray" > </solid> <padding android:bottom="2dp" android:left="2dp" android:right="2dp" android:top="2dp" /> <!-- 设置边框的颜色和宽度 --> <stroke android:width="1dp" android:color="@color/gray" > </stroke> </shape>然后创建一个selector_bg_btn.xml来引用这两个资源<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/circle_btn_normal" android:state_pressed="false"/> <item android:drawable="@drawable/circle_btn_pressed" android:state_pressed="true"/> </selector>最后在button的background属性里面引用这个selector_bg_btn.xmlandroid:background="@drawable/selector_bg_btn"