我现在用的是列表视图添加/删除页脚列表视图跨应用程序在Android版本4.3？

问题描述：

我用了的ListView 添加页脚视图，并在Android版本4.4中删除页脚它工作得很好以上但问题在Android版本4.3及以下我现在用的是下面的code添加页脚

I used to the ListView add the footer view and also remove footer its worked fine in android version 4.4 above but problem in android version 4.3 and below I am using the following code for adding the footer

listfortestmyfeed.addFooterView(footerView);

和删除页脚以下code

and remove footer following code

listfortestmyfeed.removeFooterView(footerView);

在我的logcat中删除页脚显示类转换异常

remove footer showing class cast exception in my logcat

 07-11 20:07:49.665: E/ACRA(22818): com.sample.activities fatal error : com.sample.adapters.MyfeedAdapter cannot be cast to android.widget.HeaderViewListAdapter
    07-11 20:07:49.665: E/ACRA(22818): java.lang.ClassCastException: com.sample.adapters.MyfeedAdapter cannot be cast to android.widget.HeaderViewListAdapter
    07-11 20:07:49.665: E/ACRA(22818):  at android.widget.ListView.removeFooterView(ListView.java:390)
    07-11 20:07:49.665: E/ACRA(22818):  at com.sample.fragments.MyfeedNewFragment$FollowingBloopsdoinback.onPostExecute(MyfeedNewFragment.java:172)
    07-11 20:07:49.665: E/ACRA(22818):  at com.sample.fragments.MyfeedNewFragment$FollowingBloopsdoinback.onPostExecute(MyfeedNewFragment.java:1)
    07-11 20:07:49.665: E/ACRA(22818):  at android.os.AsyncTask.finish(AsyncTask.java:631)
    07-11 20:07:49.665: E/ACRA(22818):  at android.os.AsyncTask.access$600(AsyncTask.java:177)
    07-11 20:07:49.665: E/ACRA(22818):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
    07-11 20:07:49.665: E/ACRA(22818):  at android.os.Handler.dispatchMessage(Handler.java:99)
    07-11 20:07:49.665: E/ACRA(22818):  at android.os.Looper.loop(Looper.java:137)
    07-11 20:07:49.665: E/ACRA(22818):  at android.app.ActivityThread.main(ActivityThread.java:5103)
    07-11 20:07:49.665: E/ACRA(22818):  at java.lang.reflect.Method.invokeNative(Native Method)
    07-11 20:07:49.665: E/ACRA(22818):  at java.lang.reflect.Method.invoke(Method.java:525)
    07-11 20:07:49.665: E/ACRA(22818):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    07-11 20:07:49.665: E/ACRA(22818):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    07-11 20:07:49.665: E/ACRA(22818):  at dalvik.system.NativeStart.main(Native Method)

我没有findout错误，请告诉我，任何人都知道先感谢

i didn't findout the mistake please tell me anyone know advance thanks

答

这可能是通过调用引起 setAdapter（）在ListView中的在的调用 setFooterView（）。这之前的4.4是必要的，所有版本的Android

This is probably caused by calling setAdapter() on the ListView before calling setFooterView(). This was necessary in all versions of Android prior to 4.4

其实，我不知道这个限制已经放宽了奇巧，直到我看到了这个问题...：）的

在 addFooterView（）的API级别15来源：

In the sources of addFooterView() for API level 15:

/*
 * NOTE: Call this before calling setAdapter. This is so ListView can wrap
 * the supplied cursor with one that will also account for header and footer
 * views.

同时，奇巧，这个限制放松了：

Meanwhile, it KitKat, this restriction was relaxed:

/*
 * Note: When first introduced, this method could only be called before
 * setting the adapter with {@link #setAdapter(ListAdapter)}. Starting with
 * {@link android.os.Build.VERSION_CODES#KITKAT}, this method may be
 * called at any time.

如果你想用pre-4.4兼容的，你需要尊重呼叫顺序，即

If you want to be compatible with pre-4.4, you need to respect the calling order, i.e.

addFooterView（页脚）;
setAdapter（适配器）;
removeFooterView（页脚）;

addFooterView(footer);
setAdapter(adapter);
removeFooterView(footer);

我现在用的是列表视图添加/删除页脚列表视图跨应用程序在Android版本4.3？

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