如何忽略数组适配器中的第一项
public class ListViewImgAdapter extends BaseAdapter { public static final String TAG = "ListViewImgAdapter"; private final int plastic_randomNum = 218947932; private final int plastic_iconNum = 98367590; int mGalleryItemBackground; private Context mContext; public int pageCount = Broker.model.issueFilter.issueShowingList().size(); public String[] mImageIds; public ListViewImgAdapter(Context c) { mContext = c; } public void updateListSize() { pageCount = Broker.model.issueFilter.issueShowingList().size(); Log.d(TAG, "RefreshAll, have cells: " + pageCount); } public int getCount() { return Broker.model.issueFilter.issueShowingList().size(); } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { RelativeLayout container ; // Log.d(TAG,"GetView. ConvertView "+position+" of "+ Broker.model.issueFilter.issueShowingList().size()); if (Broker.model.issueFilter.issueShowingList().size()<= position ) return null; if (convertView == null) { // Log.d(TAG,"GetView. ConvertView is null"); container = new RelativeLayout(mContext); IRIssue theIssue = Broker.model.issueFilter.issueShowingList().get(position); final int clickedPosition = position; ………….
。Broker.model.issueFilter.issueShowingList（）得到（位置）;
我有一个isssueShowingList，它是一个ArrayList，问题是如何忽略适配器中此列表中的第一个元素？ 我尝试返回null但它有一些错误，所以有更好的方法吗？ 谢谢
像往常一样返回第一个元素，但也将可见性设置为GONE或在LayoutParams中将高度设置为0。
if(position==0) convertView.setVisibility(View.GONE); else convertView.setVisibility(View.VISIBLE);
要么
RelativeLayout.LayoutParams lp=null; if(position==0) lp=new RelativeLayout.LayoutParams(-1,0); else lp=new RelativeLayout.LayoutParams(-1,-1); convertView.setLayoutParams(lp);
我认为还有更好的选择……
添加一个字段
private List mDatas; // OR private ArrayList mDatas;
然后，在您的构造函数中
public ListViewImgAdapter(Context c) { mContext = c; mDatas = Broker.model.issueFilter.issueShowingList(); if (mDatas > 0) mDatas.remove(0); }
最简单的解决方案，也是最合适的解决方案，不是破坏适配器的逻辑。 控制传递给适配器的数据要好得多。
因此，在将数据传递到适配器的代码行中，只需删除适配器不需要的所有行。
List myList = fetchMyList(); myList.remove(0); myList.remove(11); myList.remove(N); MyAdapter myAdapter = new MyAdapter(this, R.layout.myLayout, myList);