Android - 獲取子菜單中點擊的MenuItem的項目標識

Question

我正在使用城市的ArrayList填充子菜單。我似乎無法弄清楚如何獲得在子菜單中點擊的MenuItem的ID。我找不到適合我需求的方法。

讓我與你分享我的代碼。任何幫助將不勝感激。

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_base); 

    mToolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(mToolbar); 
    mToolbar.setTitleTextAppearance(this, R.style.TextAppearance_Widget_Event_Toolbar_Title); 

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    mDrawerToggle = new ActionBarDrawerToggle(
      this, mDrawerLayout, mToolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    mDrawerLayout.setDrawerListener(mDrawerToggle); 
    mDrawerToggle.syncState(); 

    mFrameLayout = (FrameLayout) findViewById(R.id.content_frame); 

    NavigationView navigationView = (NavigationView)findViewById(R.id.nav_view); 
    mDrawerMenu = navigationView.getMenu(); 

    addCitiestoMenu(); 

    navigationView.setNavigationItemSelectedListener(this); 
} 

是城市添加到子菜單的方法

private void addCitiestoMenu() { 

    cityArrayList = RealmHelper.getStoredCities(); 
    SubMenu submenu = mDrawerMenu.getItem(0).getSubMenu(); 
    submenu.setIcon(R.drawable.ic_place_black_24dp); 
    submenu.setHeaderTitle("test"); 

    int i = 0; 

    for (City city: cityArrayList) { 
     submenu.add(city.getCityName()); 
     submenu.getItem(i).setIcon(R.drawable.ic_place_black_24dp); 
     i++; 
    } 
} 

的onNavigationItemSelected方法中，我得到了點擊子菜單中的id

@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 
    Log.v(LOG_TAG, "id: "+id); 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
} 

Answer 1

你必須在菜單項上設置一個ID。只有在Menu的add方法中的一個才能設置id，例如，與Menu.add()。更改您的addCitiestoMenu()：

private void addCitiestoMenu() { 

    cityArrayList = RealmHelper.getStoredCities(); 
    SubMenu submenu = mDrawerMenu.getItem(0).getSubMenu(); 
    submenu.setIcon(R.drawable.ic_place_black_24dp); 
    submenu.setHeaderTitle("test"); 

    for (City city : cityArrayList) { 
     int cityId = city.getId(); // Get the id (You'll probably need to replace getId()) 
     MenuItem item = submenu.add(Menu.NONE, cityId, Menu.NONE, city.getCityName()); 
     item.setIcon(R.drawable.ic_place_black_24dp); 
    } 
}