android - 将所选项目的数据传递给另一个 Activity - android

Question

我有一个菜单 (fishcombovaluemeals), 当用户选择超过 1 个项目时我想要那些 出现在另一个 Activity 列表中的项目(购物车)，我已经尝试了很多但数据
永远不会出现在购物车中! onitemclick 出了什么问题!？ , 我有

fishcombovaluemeal.java  
RowItem.java  
CustomListViewAdapter.java  

fishcombovaluemeals Activity 代码:

package com.example.newlist;

  public class FishComboValueMeals extends Activity  implements
  OnItemClickListener {
          ImageButton  Ib2;
          public static final String[] titles = new String[] {
" Fillet-O-Fish (Medium Value     Meals) ",
"Fillet-O-Fish (Large Value Meals)  ",
"Double Fillet-O-Fish (Medium     Value Meals)",
" Double Fillet-O-Fish (Large Value     Meals)  ",

};




public static final String[] descriptions = new String[] {
        "Light, flaky filet of white fish    topped with tangy tartar   ",
        "Light, flaky filet of white fish     topped with tangy tartar   ",
        "2 patties of tender fish filet over a       layer of cheese,    ",
        " 2 patties of tender fish filet over a       layer of "

};
public static final Integer[] images = { 
                           R.drawable.imfc1,
               R.drawable.imfc2,        
                           R.drawable.imfc3, 
                           R.drawable.imfc4  };



public static final Double[] prices = { 20.0, 22.73, 24.77,  27.04 };

ListView listView;
List<RowItem> rowItems;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_breakfast);


    rowItems = new ArrayList<RowItem>();
    for (int i = 0; i < titles.length; i++) {
        RowItem item = new RowItem    (images[i], titles[i], descriptions[i],
                prices[i]);
        rowItems.add(item);
    }
    listView = (ListView) findViewById(R.id.list);
    CustomListViewAdapter adapter = new     CustomListViewAdapter(this,
            R.layout.list_item,     rowItems);
    listView.setAdapter(adapter);
    listView.setOnItemClickListener(this);


    Ib2 = (ImageButton) findViewById    (R.id.Button02);


    Ib2.setOnClickListener(new View.OnClickListener() {

    @Override
public void onClick(View arg0) {
// TODO Auto-generatedmethod stub
Intent openStartingPoint = new Intent (getApplicationContext(),ShoppingCart.class);


            startActivity (openStartingPoint);

        }
    });}    



@Override
public void onItemClick(AdapterView<?> parent, View   view, int position,
        long id) {

Intent i = new Intent(getApplicationContext(), ShoppingCart.class);

i.putExtra("EXTRA", "Item " + (position + 1) + ": " + rowItems.get(position));
    startActivity(i);
        }


}

Answer 1

获取 ListView 的选中项并通过intent发送值

@Override
public void onItemClick(AdapterView<?> parent, View   view, int position,
        long id) {
String value = lv1.getItemAtPosition(position).toString();
Intent i = new Intent(getApplicationContext(), ShoppingCart.class);
i.putExtra("EXTRA", value);
    startActivity(i);
}

并在其他 Activity 中获取值(value)

Bundle bundle=getIntent().getExtras();
String value=bundle.getString("EXTRA");