day4.09总结_Menu 菜单

（1）选项菜单 （Option Menu）:

通常会结合actionBar使用

1)onCreateOptionsMenu (此方法中创建菜单)

2)onOptionsItemSelected(此方法中处理菜单的点击操作）

例子1：菜单的初始化——监听器

public class MainActivity extends Activity {            @Override          protected void onCreate(Bundle savedInstanceState) {                    super.onCreate(savedInstanceState);                    setContentView(R.layout.activity_main);          }          /**此方法会在父类的onCreate方法中进行回调，用于创建           * 一些选项菜单*/          @Override          public boolean onCreateOptionsMenu(Menu menu) {                             getMenuInflater().inflate(R.menu.main,menu);    初始化一个菜单                    //可选：获得item                    MenuItem item=menu.findItem(R.id.item00);                    SearchView sv=(SearchView)item.getActionView();    获取搜索框view                    //sv.setOnQueryTextListener(listener)               添加监听器                    return true;          }          /**监听选项菜单的item的点击事件*/          @Override          public boolean onOptionsItemSelected(MenuItem item) {                    int id=item.getItemId();           获取菜单项的ID                    if(id==R.id.item02){                      //Toast.makeText(this, "拨号", 1).show();                      Intent intent=new Intent(Intent.ACTION_CALL);   跳转到打电话页面                      intent.setData(Uri.parse("tel:010")); 拨打的号码                       startActivity(intent);                            }else if(id==R.id.item03){                    }                    return true;          } } 设置权限 <uses-permission android:name="android.permission.CALL_PHONE"/>

 

（2）上下文菜单 (Context Menu)：

基于某个view的长按事件

1)创建：onCreateContextMenu

2)注册(在view上注册):registerForContextMenu

3)监听：onContextItemSelected

例子2：长按删除选项

public class MainActivity extends ListActivity {            private List<String> list;          @Override          protected void onCreate(Bundle savedInstanceState) {                    super.onCreate(savedInstanceState);                    //setContentView(R.layout.activity_main);              list=new ArrayList<String>();              list.add("A");list.add("B");list.add("C"); setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list));               //在listview上注册上下文菜单                    registerForContextMenu(getListView());          }          /**当长按注册了上下文菜单的view对象时就会执行此方法*/          @Override          public void onCreateContextMenu(ContextMenu menu,View v,ContextMenuInfo menuInfo) {                      //1.基于xml方式                    getMenuInflater().inflate(R.menu.context_main_1, menu);                      //2.基于java方式                    //menu.add(groupId, itemId, order, title)              //SubMenu sm= menu.addSubMenu(groupId, itemId, order, title)              //sm.add(groupId, itemId, order, title)          }          @Override          public boolean onContextItemSelected(MenuItem item) {                    //获得菜单项相关信息                    AdapterContextMenuInfo c=(AdapterContextMenuInfo)item.getMenuInfo();                    Log.i("TAG", "c="+c);                    //获得长按的item位置                    int pos=c.position;                    if(item.getItemId()==R.id.delete){                    Toast.makeText(this, "删除", 1).show();                                       //删除内存数据                    list.remove(pos);                    //通知更新                    ((ArrayAdapter<?>)                     getListAdapter())//ListAdapter(接口)                    .notifyDataSetChanged();                    }                    return super.onContextItemSelected(item);          } }

 

例子3：java方式创建菜单

public boolean onCreateOptionsMenu(Menu menu) {                    // Inflate the menu; this adds items to the action bar if it is present.                    //getMenuInflater().inflate(menuRes, menu)                                      MenuItem item01=menu.add(1, 100, 200, "item01");  保证第二项的ID不相同                    item01.setIcon(android.R.drawable.ic_menu_add);                    item01.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);                                       MenuItem item02=m 4000 enu.add(1, 101, 201, "item02");                    item02.setIcon(android.R.drawable.ic_menu_close_clear_cancel);                    item02.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);                                       MenuItem item03=menu.add(1, 102, 201, "item02");                    item03.setIcon(android.R.drawable.ic_menu_search);                   item03.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS|MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW);                    item03.setActionView(new SearchView(this));                                       //menu.addSubMenu(groupId, itemId, order, title)                    return true;          }

 

 

 

（3）弹出式菜单 (Popu Menu):

基于某个view的点击事件

例子4：弹出式菜单

public class MainActivity extends Activity {                   @Override          protected void onCreate(Bundle savedInstanceState) {                    super.onCreate(savedInstanceState);                    setContentView(R.layout.activity_main);          }     public void onClick(final View v){              //1.构建一个PopuMenu对象,并将此对象注册到一个view上              PopupMenu pm=new PopupMenu(this, v);              //2.构建菜单项对象              /*pm.getMenuInflater()              .inflate(R.menu.main,              pm.getMenu());*/              pm.getMenu().add(1, 1,100, "A");              pm.getMenu().add(1, 2,101, "B");              pm.getMenu().add(1, 3,102, "C");              //添加监听器              pm.setOnMenuItemClickListener(new OnMenuItemClickListener() {                             @Override                             public boolean onMenuItemClick(MenuItem item) {                                      ((Button)v).setText(item.getTitle());        获取选项的文本                                      return true;                             }                    });              //3.显示菜单              pm.show();     } }

（4）.子菜单(以上每种菜单都可以创建子菜单)

 

例子5：子菜单

<item         android:id="@+id/action_settings"         android:orderInCategory="100"         android:showAsAction="always"         android:title="@string/action_settings"         android:icon="@android:drawable/ic_menu_set_as">                 <menu>             <item android:id="@+id/item01"                 android:orderInCategory="200"                 android:showAsAction="never"                 android:title="item01"/>             <item android:id="@+id/item02"                 android:orderInCategory="201"                 android:showAsAction="never"                 android:title="item01"/>         </menu>     </item>

例子6：实现菜单的分组(便于统一显示或隐藏)

public class MainActivity extends Activity {            @Override          protected void onCreate(Bundle savedInstanceState) {                    super.onCreate(savedInstanceState);                    setContentView(R.layout.activity_main);          }          private Menu optionMenu;          @Override          public boolean onCreateOptionsMenu(Menu menu) {               // Inflate the menu; this adds items to the action bar if it is present.                    getMenuInflater().inflate(R.menu.main, menu);                    this.optionMenu=menu;                    return true;          }          boolean flag=true;          public void onClick(View v){                    if(flag){                             flag=false;                    }else{                             flag=true;                    }                    optionMenu.setGroupVisible(R.id.group01,flag);参数一：菜单组 参数二：隐藏（false）或显示（true）          } }