Android中使用Intent完成掌上菜谱应用的代码清单

1、Android中使用Intent完成掌上菜谱应用的代码清单范美英（北京信息职业技术学院）摘 要：Android中可以使用Intent完成界面切换、组件之间的通信等功能，本文详细罗列了使用Intent实现掌上菜谱应用的代码清单。关键词： Android；Intent；菜谱应用；代码清单 1 src/WelcomeActivity.java类的代码public class WelcomeActivity extends Activity Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedI

2、nstanceState); public void click_entry(View v) Intent intentW=new Intent(WelcomeActivity.this,MenuListActivity.class); startActivity(intentW); 2 src/MenuListActivity.java类的代码public class MenuListActivity extends Activity implements OnItemClickListener ListView lvMenu;ArrayAdapter aa_lv;Overrideprote

3、cted void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);lvMenu.setAdapter(aa_lv);lvMenu.setOnItemClickListener(this);Overrideprotected void onResume() super.onResume();Overridepublic void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) Intent intentM=new Intent

4、(MenuListActivity.this, DishInfoActivity.class);/arg2是列表项的序号，在本例中可作为标识所选菜品的编号intentM.putExtra(dish_id, arg2);startActivity(intentM);public void addDish(View v)Intent i=new Intent(MenuListActivity.this,AddDishActivity.class);startActivityForResult(i,0);Overrideprotected void onActivityResult(int requ

5、estCode, int resultCode, Intent data) if(resultCode=RESULT_OK)String title=data.getStringExtra(new_dish_title);String info=data.getStringExtra(new_dish_info);if(title.equals()title=新增菜品+(aa_lv.getCount()-3);info=新增菜品+(aa_lv.getCount()-3)+的制作方法;Dish new_dish=new Dish(title,info);lvMenu.setAdapter(aa_

6、lv);3 src/DishInfoActivity.java类的代码public class DishInfoActivity extends Activity TextView tv_dish_title,tv_dish_info;Overrideprotected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);Intent intentFrom=getIntent();int dishID=intentFrom.getIntExtra(dish_id, 0);4 src/AddDis

7、hActivity.java类的代码public class AddDishActivity extends Activity Intent i;EditText edt_dish_title,edt_dish_info;Overrideprotected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);i=this.getIntent();public void finishAdd(View v)i.putExtra(new_dish_title, edt_dish_title.getTe

8、xt().toString();i.putExtra(new_dish_info, edt_dish_info.getText().toString();finish();5 src/MenuInfo.java类的代码public class MenuInfo / 定义一个内部类，作为系统的业务对象public static class Dishpublic String title;public String desc;public Dish(String title)this.title = title;public Dish(String title,String desc)this.t

9、itle = title;this.desc=desc;Overridepublic String toString()return title;/ 使用List集合记录系统所包含的Dish对象public static List ITEMS = new ArrayList();/ 使用Map集合记录系统所包含的Dish对象/public static Map ITEM_MAP = new HashMap();static/ 使用静态初始化代码，将对象添加到List集合、Map集合中addItem(new Dish(京酱肉丝,豆腐皮即可。);addItem(new Dish(红烧肉,将带皮五花

10、肉即成。);addItem(new Dish(鸡蛋饼,鸡蛋加盐双面变黄即可。);addItem(new Dish(自制薯条,普通土豆淋酱。);private static void addItem(Dish dish)ITEMS.add(dish);/ITEM_MAP.put(dish.id, dish);6 res/layout/adddish.xml的代码清单 android:layout_width=match_parent android:layout_height=match_parent android:orientation=vertical 7 res/layout/dishi

11、nfo.xml的代码清单 android:layout_width=fill_parent android:layout_height=fill_parent android:orientation=vertical 8 res/layout/menulist.xml的代码清单 android:layout_width=match_parent android:layout_height=match_parent android:orientation=vertical 9 res/layout/welcome.xml的代码清单 android:layout_width=fill_parent android:layout_height=fill_parent android:background=drawable/welcome 10 r