50个Android开发技巧(12 为控件加入圆角边框)

<shape xmlns:android = "http://schemas.android.com/apk/res/android"
    android:shape= "rectangle" >
    <solid android:color= "#AAAAAA" />
    <corners android:radius= "15dp" />
</shape>

<RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"
    android:layout_width= "fill_parent"
    android:layout_height= "fill_parent"
    android:gravity= "center" >

    <Button
        android:id ="@+id/button"
        android:layout_width ="wrap_content"
        android:layout_height ="wrap_content"
        android:background ="@drawable/button_rounded_background"
        android:padding ="10dp"
        android:text ="@string/hello"
        android:textColor ="#000000" />

</RelativeLayout>