[英]Android: how to get list item property with floating context menu item click
我有一个活动与arraylist声明
private ArrayList<Product> products = new ArrayList<Product>();
并在onCreate内
products.add(new Product("Product One",100, 1));
products.add(new Product("Product Two",200, 2));
products.add(new Product("Product Three",170, 3));
products.add(new Product("Product Four",220, 4));
ProductAdapter itemsAdapter = new ProductAdapter(this, products);
ListView listView = (ListView) findViewById(R.id.list);
listView.setAdapter(itemsAdapter);
registerForContextMenu(listView);
在产品类中:
public class Product {
private String mProductName;
private int mProductPrice;
private int mProductId;
public Product(String productName, int productPrice, int productId){
mProductName = productName;
mProductPrice = productPrice;
mProductId = productId;
}
public String getProductName(){
return mProductName;
}
public int getProducId(){
return mProductId;
}
public int getProductPrice(){
return mProductPrice;
}
}
而且适配器很容易获得每个产品的名称和价格并查看列表。 现在在活动中,我像这样创建上下文菜单
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
使用“ onContextItemSelected”从上下文菜单中选择“ optipn”后,如何获得长按项属性(例如产品ID)?
首先设置一个全局变量productId,然后在listview上长按侦听器设置产品ID。 看一下下面的示例代码。
int productId = 0;
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener()
{
@Override
public boolean onItemLongClick(AdapterView<?> arg0,
View arg1,int pos, long id) {
// TODO Auto-generated method stub
Product product =
(Product)arg0.getAdapter().getItem(position)
productId = product.mProductId;
return false;
}
});
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