自定义viewgroup时，报错提示：没有找到属性rightpadding的资源标识符，求指导

Question

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>mainfest中的包名也是正确的<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.immoc.slidingmenu"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="21" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/Theme.AppCompat.Light.NoActionBar" >        <activity            android:name="com.imooc.slidingmenu.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

Answer 1

改成这样试试看