我已经开始为android编写一个小应用程序。它看起来非常好,但有一件事我不明白。如何将一个向量插入intent.extra?
我创建了一个的活动时,一个新的意图,我添加了一个串行化向量intent.putExtra("key", vector)
。在被叫活动B我这样做:Vector<ItemModel> items = (Vector<ItemModel>) getIntent().getExtras().getSerializable("key")
。此行导致ClassCastException
。有谁知道为什么?请帮我:-)
这里是两个活动的源和ItemModel
的:
ItemModel:
public class ItemModel implements java.io.Serializable {
private static final long serialVersionUID = -1772392719565658730L;
public int id;
public String name;
public String quantity;
public int status;
}
ShoppingListActivity(A):
public void onClickItems(final View v){
final Intent intent = new Intent(this,ItemListActivity.class);
Vector<ItemModel> v1 = new Vector<ItemModel>();
ItemModel item = new ItemModel();
item.name = "Tomaten";
item.quantity = "400g";
item.id = 12;
item.status = 0;
v1.add(item);
item = new ItemModel();
item.name = "Bohnen";
item.quantity = "150g";
item.id = 13;
item.status = 0;
v1.add(item);
item = new ItemModel();
item.name = "Schokolade";
item.quantity = "5 Tafeln";
item.id = 17;
item.status = 0;
v1.add(item);
intent.putExtra("ShoppingList", v1);
startActivity(intent);
ItemListActivity( B):
public class ItemListActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.item);
ListView list = (ListView) findViewById(R.id.ITEMSLIST);
final Bundle extras = getIntent().getExtras();
Vector<ItemModel> items = (Vector<ItemModel>) extras.getSerializable("ShoppingList");
ArrayList<HashMap<String, Object>> itemsList = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> itemMap = new HashMap<String, Object>();
}
它没有为我工作,因为我使用列表太糟糕了任何建议..最初我做了第二个活动的Web服务请求 –
shareef
2012-12-02 19:54:15