xml文件中的引用：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    xmlns:hyman="http://schemas.android.com/apk/res/com.imooc.slidingmenu"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

已指明属性的用法：

public SlidingMenu(Context context, AttributeSet attrs, int defStyle) {

super(context,attrs,defStyle);

TypedArray a = context.getTheme().obtainStyledAttributes(attrs,R.styleable.SlidingMenu, defStyle, 0);

int n = a.getIndexCount();

for (int i = 0; i < n; i++)

{

int attr = a.getIndex(i);

switch (attr)

{

case R.styleable.SlidingMenu_rightPadding:

mMenuRightPadding = a.getDimensionPixelSize(attr,(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, context.getResources().getDisplayMetrics()));

break;

}

}

attr.xml：

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <attr name="rightPadding" format="dimension"></attr>

    <declare-styleable name="SlidingMenu">

        <attr name="rightPadding"></attr>

    </declare-styleable>

</resources>