Adsize和adUnitID错误？

Question

我的Android应用中存在问题。错误是：

  

\ res \ layout \ main.xml：37：错误：找不到属性＆＃39; adUnitId＆＃39;在包＆＃39; com.sherdle.base＆＃39;

     

\ res \ layout \ main.xml：37：错误：找不到属性＆＃39; adSize＆＃39;的资源标识符在包＆＃39; com.sherdle.base＆＃39;

为什么会这样？

main.xml中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="@+id/layoutholder"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/theme"
android:orientation="vertical" >

<!-- splash  -->

<ImageView 
    android:contentDescription="@string/app_name"
    android:id="@+id/imageLoading1"
    android:layout_height="fill_parent"
    android:layout_width="fill_parent"
    android:background="@android:color/white"
    android:visibility="gone"
    android:src="@drawable/vert_loading"
    />

 <RelativeLayout
    android:id="@+id/relative"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom"
    android:gravity="center_horizontal" >


<!-- advertisements-->

<LinearLayout
    android:id="@+id/adViewH"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true">

    <com.google.android.gms.ads.AdView 
            android:id="@+id/adView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            ads:adUnitId="ca-app-pub-xxxxxx"
            ads:adSize="SMART_BANNER"/>

</LinearLayout>

<WebView
    android:id="@+id/webkit"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_above="@+id/adViewH"
    android:layout_below="@+id/progressbar"
    android:visibility="visible" />

<ProgressBar
    android:id="@+id/progressbar"
    style="?android:attr/progressBarStyleHorizontal"
    android:layout_width="match_parent"
    android:layout_height="4dp"
    android:max="100"
    android:progress="50"
    android:progressDrawable="@drawable/myprogressbar"
    android:secondaryProgress="0" />

<!-- Include the slide down view. -->
<include layout="@layout/slide_down_view"
   android:id="@+id/slide_down_view_include"
   android:layout_width="match_parent"
   android:visibility="gone"
   android:layout_height="20dp"
   android:layout_marginBottom="-20dp"/>

</RelativeLayout>

</LinearLayout>

此外，我的Eclipse在此部分的 mainactivity.java 中显示了一个十字标记：

    // admob

    if (!(getResources().getString(R.string.publisher_id).equals(""))) {
    // Look up the AdView as a resource and load a request.
        AdView adView = (AdView) findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        adView.loadAd(adRequest);
    } else {
        AdView adView = (AdView) findViewById(R.id.adView);
        adView.setVisibility(View.GONE);
    }