listview添加header时的注意事项

LayoutInflater mInflater = (LayoutInflater) getActivity()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout    loadMoreLayout = (LinearLayout) mInflater.inflate(
R.layout.header, null);
如上方法，这里的header是我为listview准备的header布局，里面xml情况是这样

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<com.scdl.zny.view.SlideShowView
android:id="@+id/ssv"
android:layout_width="fill_parent"
android:layout_height="250dp"></com.scdl.zny.view.SlideShowView>

</LinearLayout>

LinearLayout    loadMoreLayout = (LinearLayout) mInflater.inflate(
R.layout.header, this);

/**
* The list is empty. Clear everything out.
*/
@Override
void resetList() {
// The parent's resetList() will remove all views from the layout so we need to
// cleanup the state of our footers and headers
clearRecycledState(mHeaderViewInfos);
clearRecycledState(mFooterViewInfos);

super.resetList();

mLayoutMode = LAYOUT_NORMAL;
}

private void clearRecycledState(ArrayList<FixedViewInfo> infos) {
if (infos != null) {
final int count = infos.size();

for (int i = 0; i < count; i++) {
final View child = infos.get(i).view;
final LayoutParams p = (LayoutParams) child.getLayoutParams();
if (p != null) {
p.recycledHeaderFooter = false;
}
}
}
}

这里的 mFooterViewInfos 实际上就是我们添加的Footer view的一个列表。代码里循环处理每个footer view，而在getLayoutParams()时，ListView要求必须是AbsListView的LayoutParams，而在我们自己的代码中：LinearLayout    loadMoreLayout = (LinearLayout) mInflater.inflate(
R.layout.header, null);

所以解决办法很简单，就是LinearLayout    loadMoreLayout = (LinearLayout) mInflater.inflate(
R.layout.header, null);this，改为null就行