在開發的過程中有時候需要把控件做出圓角邊框的樣子,下發介紹繪製的方法:
首先,在res下面新建一個文件夾drawable,在drawable下面新建三個xml文件:shape_corner_down.xml、shape_corner_up.xml和shape_corner.xml,分別是下面兩個角是圓角邊框,上面兩個角是圓角邊框,四個角全部是圓角邊框。
shape_corner_down.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#0099CC" />
<corners android:bottomRightRadius="20dp"
android:bottomLeftRadius="20dp"/>
<stroke android:width="1dp" android:color="#000000"/>
</shape>
shape_corner_up.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#CCCC99" />
<corners android:topLeftRadius="20dp"
android:topRightRadius="20dp" />
<stroke android:width="1dp" android:color="#000000" />
</shape>
shape_corner.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#99CCFF" />
<corners android:topLeftRadius="20dp"
android:topRightRadius="20dp"
android:bottomRightRadius="20dp"
android:bottomLeftRadius="20dp"/>
<stroke android:width="1dp" android:color="#000000" />
</shape>
<solid android:color>設置了背景顏色。android:topLeftRadius、android:topRightRadius、android:bottomLeftRadius、android:bottomRightRadius分別是左上角、右上角、左下角、右下角的半徑值,設置了半徑值,相應的角就是圓角,半徑值越大,圓角就越大。<stroke>設置邊界屬性,如邊界的寬度、顏色等。
在activity_main.xml上面放置三個LinearLayout,分別設置android:background屬性爲shape_corner_up.xml、shape_corner_down.xml和shape_corner.xml,運行結果如下: