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我使用this horizontal list view，如果我在listView适配器中没有项目开始emptyView显示，如果我开始WITH项目在ListView适配器它隐藏emptyView，但我的问题是该空视图将永远不会显示，如果我开始与项目，并从ListView控件适配器删除所有项目，并会呆在那里，如果我开始没有项目，并尝试将项目添加到ListView适配器当listview被更改时，setEmptyView不会更新
Mainactivity
@Override
protected void onCreate(Bundle savedInstanceState) {
listView = (HorizontalListView) findViewById(R.id.listView1);
imageAdapter = new ImageAdapter(this, products);
listView.setAdapter(imageAdapter);
listView.setEmptyView(findViewById(R.id.empty_list_view));
...
private void loadProduct(Intent data) {
Bundle extras = data.getExtras();
Product p = (Product)extras.getParcelable(PASSED_PRODUCT);
imageAdapter.add(p);
}
... imageadapter类
public class ImageAdapter extends BaseAdapter {
...
public ImageAdapter(Context context, List<Product> products) {
this.context = context;
this.products = products;
}
// getView that displays the data at the specified position in the data set.
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// create a new LayoutInflater
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View gridView;
gridView = null;
convertView = null;// avoids recycling of grid view
if (convertView == null) {
gridView = new View(context);
// inflating grid view item
gridView = inflater.inflate(R.layout.list_view_item, null);
Product p = products.get(position);
...
public void add(Product p) {
products.add(p);
// notify the list that the underlying model has changed
System.out.println("product added");
notifyDataSetChanged();
}
public void remove(int position) {
products.remove(position);
System.out.println("product removed");
notifyDataSetChanged();
}
删除项目的代码不显示，是否删除项目后调用notifyDataSetChanged（）？ –
是的，它和add方法一样，除了products.remove（p） – Thomas