如何将菜单动态添加到底部导航视图？

Question

Android有新的UI元素 - BottomNavigationView

我不想包含在XML文件中我的菜单。我会收到有关菜单项和后端订购的信息。我想动态创建它们并将其设置为onCreate()方法中的BottomNavigationView。我可以这样做吗？

Answer 1

继承人一个动态构建菜单项的例子，在主要活动中你有2个布局。 你可以从你的后端获得自己的布局和动态使用menu.add

SRC创建菜单项：http://www.mobiledevguide.com/2014/01/dynamically-create-menu-items-in-android.html

public class MainActivity extends Activity { 

private Button mButtonOne,mButtonTwo; 
private static final int MENU_ITEM_ID_ONE =1; 
private static final int MENU_ITEM_ID_TWO =2; 
private static final int MENU_ITEM_ID_THREE =3; 
private static final int MENU_ITEM_ID_FOUR =4; 
private static final int MENU_ITEM_ID_FIVE =5; 
private static final int MENU_ITEM_ID_SIX =6; 
private int mMenuSet = 0; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    mButtonOne=(Button) findViewById(R.id.buttonSetOne); 
    mButtonTwo=(Button) findViewById(R.id.buttonSetTwo); 

    mButtonOne.setOnClickListener(clickListener); 
    mButtonTwo.setOnClickListener(clickListener); 
} 
OnClickListener clickListener=new OnClickListener() { 

    @Override 
    public void onClick(View v) { 
     if (v.getId()==R.id.buttonSetOne) { 
      mMenuSet=1; 
     } else if (v.getId()==R.id.buttonSetTwo){ 
      mMenuSet=2; 
     } 
     invalidateOptionsMenu(); 
     /* 
     * if you are using ActionBarSherlock use this.supportInvalidateOptionsMenu(); 
     * if you are using ActionBarCompat use invalidateOptionsMenu (Activity activity) method 
     * */ 
    } 
}; 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.main, menu); 

    if(mMenuSet==1){ 
     menu.add(Menu.NONE, MENU_ITEM_ID_ONE, Menu.NONE,getString(R.string.str_menu_one)).setIcon(R.drawable.ic_action_one).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 
     menu.add(Menu.NONE, MENU_ITEM_ID_TWO, Menu.NONE,getString(R.string.str_menu_two)).setIcon(R.drawable.ic_action_two).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 
     menu.add(Menu.NONE, MENU_ITEM_ID_THREE, Menu.NONE,getString(R.string.str_menu_three)).setIcon(R.drawable.ic_action_three); 

    }else if(mMenuSet==2){ 
     menu.add(Menu.NONE, MENU_ITEM_ID_FOUR, Menu.NONE,getString(R.string.str_menu_four)).setIcon(R.drawable.ic_action_four).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 
     menu.add(Menu.NONE, MENU_ITEM_ID_FIVE, Menu.NONE,getString(R.string.str_menu_five)).setIcon(R.drawable.ic_action_five).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 
     menu.add(Menu.NONE, MENU_ITEM_ID_SIX, Menu.NONE,getString(R.string.str_menu_six)).setIcon(R.drawable.ic_action_six); 
    }  
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    switch (item.getItemId()) { 
    case MENU_ITEM_ID_ONE: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_one), Toast.LENGTH_SHORT).show(); 
     break; 
    case MENU_ITEM_ID_TWO: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_two), Toast.LENGTH_SHORT).show(); 
     break; 
    case MENU_ITEM_ID_THREE: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_three), Toast.LENGTH_SHORT).show(); 
     break; 
    case MENU_ITEM_ID_FOUR: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_four), Toast.LENGTH_SHORT).show(); 
     break; 
    case MENU_ITEM_ID_FIVE: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_five), Toast.LENGTH_SHORT).show(); 
     break; 
    case MENU_ITEM_ID_SIX: 
     Toast.makeText(this, "Click on "+ getString(R.string.str_menu_six), Toast.LENGTH_SHORT).show(); 
     break; 
    case R.id.action_settings: 
     Toast.makeText(this, "Click on "+ getString(R.string.action_settings), Toast.LENGTH_SHORT).show(); 
     break; 

    default: 
     break; 
    } 
    return super.onOptionsItemSelected(item); 
}} 

Answer 2

默认情况下，BottomNavigationView开始用空的菜单。您可以使用getMenu()方法获取Menu实例，然后像response above中那样添加菜单项。例如，

BottomNavigationView bottomNavigation = findViewById(R.id.bottom_navigation); 
Menu menu = bottomNavigation.getMenu(); 
menu.add(Menu.NONE, MENU_ITEM_ID_ONE, Menu.NONE, getString(R.string.str_menu_one)) 
    .setIcon(R.drawable.ic_action_one); 

Answer 3

在底部导航视图中使用动态选项简单的方法是使用不同的菜单项是这样的：

switch (userType){ 
      case UserTypes.A: 
       bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation_a); 
       break; 
      case UserTypes.B: 
       bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation_b); 
       break; 
      case UserTypes.C: 
       bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation_c); 
       break; 
     }