How can I add a menu dynamically to bottom navigat

Question

Android has new ui element - BottomNavigationView

I don't want to contain my menus in the xml files. I will receive the information about menu items and order from backend side. I want to create them dynamically and set into the BottomNavigationView in the onCreate() method. Can I do this?

Answer 1

The easy way to use dynamic options in bottom navigation view is use different menu items like this:

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;
        }

Answer 2

By default, BottomNavigationView starts with an empty menu. You can use the getMenu() method to get the Menu instance, then add menu items as in the response above. For example,

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

Heres an example of dynamic build of menu items, in the main activity u have 2 layouts. you can get your own layout from your backend and create menu items dynamically using menu.add

src: 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);
}}