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我使用兼容性包在我的 Android 应用程序中使用 SherlockFragments。收到此错误fragmentsFATAL EXCEPTION: main java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.我将这些片段作为选项卡添加到 actionbar sherlock 中。当我第一次切换标签时成功运行应用程序后,它工作正常,第二次它在 onCreateView() 中给出上述错误。

这是 onCreate() 中的代码

private static final String AD_UNIT_STANDARD_BANNER = "/6253334/dfp_example_ad/banner";
private DfpAdView adView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState); 

    adView = new DfpAdView(getActivity(), AdSize.BANNER, AD_UNIT_STANDARD_BANNER);  
    adView.setAdListener(this);
}

这是我在片段 onCreateView() 中使用的代码。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {     
    View view = inflater.inflate(R.layout.fragment_chats, container, false);         
    listview = (ListView) view.findViewById(android.R.id.list); 
    RelativeLayout layout = (RelativeLayout) view.findViewById(R.id.chats_inner_layout);

    adView.setId(111);
    adView.loadAd(new AdRequest());        
    RelativeLayout.LayoutParams add_lp = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    add_lp.addRule(RelativeLayout.BELOW, adView.getId());   
    listview.setLayoutParams(add_lp);

    //**** this is the line causing for error****/////
    layout.addView(adView);         
    return view;         
}

这是上述片段的 xml 代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/chats_main_layout"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="@color/app_lite_theme"
   android:orientation="vertical" >

   <RelativeLayout
      android:id="@+id/chats_inner_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical" >

      <ListView
          android:id="@android:id/list"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
          android:layout_marginLeft="8dp"
          android:layout_marginRight="8dp"
          android:scrollbars="none" />

   </RelativeLayout>
</RelativeLayout>

我用于片段的相同代码可以正常工作而没有任何问题。我只面临片段的问题。这里有什么问题 ?有人告诉我解决方案。

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1 回答 1

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我认为这部分有问题

  listview.setLayoutParams(add_lp);

它应该是

 addView.setLayoutParams(add_lp);   
于 2013-03-04T05:13:41.743 回答