Develop Reference

How to change text content in bottomNavigationView dynamically

I've got bottomNavigationView which is already created and attach to activity. Currently I'm trying to find out how to change text in one of navigation items which are inflated from res-menu dynamically.
I've tried to look into existing threads and none of that help me (I've already tried to pick menu from onCreateOptionsMenu and change it with setTitle option later but that wouldn't change text in the activity)
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
this.menu = menu;
return true;
}
//later update on button click (this action is performed)
menu.findItem(R.id.secondItem).setTitle("New Text");
I've expected to change text to "New Text" but it's still same as before

Okay after a while of trying I've finally figured out how to do that. Instead of taking menu during onCreateOptionsMenu I've pick menu directly from bottomNavigationView when I click on the button
//your code to invoke this action
Menu menu = bottomNavigationView.getMenu();
menu.getItem(2).setTitle("New Text");

try this method inside your activity/fragment:
public void setNavigationTitle(String title) {
MenuItem menuItem = bottomNavigationView.getMenu().findItem(R.id.action_navigation_next);
menuItem.setTitle(title);
}

Android Action bar Image

I want to display one image in the Right most corner of action bar. I want this image to be set at runtime depending on some code checks. Can someone guide me how to go about it?
Thanks

Use this. This code adds a refresh button at top right with the icon called R.drawable.refresh. Will show the icon only if there's enough space, else it will show it on the menu
private Menu myMenu
public void changeMenu (int resource) {
myMenu.getItem(0).setIcon(resource); //here resource is your R.drawable.insertid
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.activity_main, menu);
myMenu = menu;
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
menu.add("Refresh").setIcon(R.drawable.refresh)
.setOnMenuItemClickListener(new OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
doStuff();
return false;
}
}).setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
return super.onCreateOptionsMenu(menu);
}
Just call changeMenu wherever you want to change the code and pass the drawable id.
Edit: Paste this on your activity and add the imports that ask you. You should add your own drawable according to what you want. Remember that icons measure
mdpi: 32x32
hdpi: 48x48
xhdpi: 64x64

if you want to change it at run time you need to make the menu (in onCreateOptionsMenu) and save the menu item. Like this
MenuItem changeableMenuItem = menu.add("new Item");
now you can call changeableMenuItem.setIcon to change the icon, then if you make changeableMenuItem a field in the class you can change the Icon anywhere in the class.
you can reference Dante's answer if you're not sure how to make the menu item.

Get item view from ActionBar

I have an ActionBarSherlock with one menu item in my bar. When I'm call
View item = findViewById(R.id.my_item);in activity's button onClick all works fine as expected.
But when I try to do this in onCreate or onResume or even in onPostResume it is always null. I also tryed do this in onCreateOptionsMenu(Menu menu) after inflating my menu from resource, but without any succes.
Therefore I can't understand when actionbar items created and how to catch this moment?

As it has been said here and here, getActionView returns the view that we sets in setActionView. Therefore, the only one way to customize action bar menu item described here

actually it is possible to get the view of the action item, even if it's not customized.
however, do note that sometimes action items get to be inside the overflow menu so you might get a null instead.
so, how can you do it?
here's a sample code:
public boolean onCreateOptionsMenu(final Menu menu) {
getSupportMenuInflater().inflate(R.menu.main, menu);
new Handler().post(new Runnable() {
#Override
public void run() {
final View syncItemView = findViewById(R.id.action_search);
...
this was tested when using actionBarSherlock library, on android 4.1.2 and android 2.3.5 .
another alternative is to use a more extensive way , used on the showcaseView library, here .

first of all get a menu reference as below:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.custom_menu, menu);
customMenu = menu;
return super.onCreateOptionsMenu(menu);
}
after that you can get the item you need as below
customMenu.getItem(0);

subMenu in Android

I want to attach a menu item on click of which a sub menu opens.
I am able to get the output but my menu item always appears in the overflow menu. With some research I found out that setShowAsAction can be used to make it visible on the Action Bar but I can't set them for subMenu item.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
//(this is valid) menu.add("File").setShowAsAction(2);
SubMenu sm = menu.addSubMenu("File");
//(can't do this) sm.setShowAsAction(2);
sm.add("Open");
sm.add("Close");
return true;
}

Use sm.getItem() to get the actual MenuItem for the submenu. You can then call setShowAsAction() on that.

How can I get the options menu of my Activity?

In some methods of my Activity I want to check the title of menu or know if it is checked or not. How can I get Activity's menu. I need something like this.getMenu()

Be wary of invalidateOptionsMenu(). It recreates the entire menu. This has a lot of overhead and will reset embedded components like the SearchView. It took me quite a while to track down why my SearchView would "randomly" close.
I ended up capturing the menu as posted by Dark and then call onPrepareOptionsMenu(Menu) as necessary. This met my requirement without an nasty side effects. Gotcha: Make sure to do a null check in case you call onPrepareOptionsMenu() before the menu is created. I did this as below:
private Menu mOptionsMenu;
#Override
public boolean onCreateOptionsMenu(final Menu menu) {
mOptionsMenu = menu
...
}
private void updateOptionsMenu() {
if (mOptionsMenu != null) {
onPrepareOptionsMenu(mOptionsMenu);
}
}

Call invalidateOptionsMenu() instead of passing menu object around.

you could do it by passing the Menu object to your Activity class
public class MainActivity extends Activity
{
...
...
private Menu _menu = null;
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
_menu = menu;
return true;
}
private Menu getMenu()
{
//use it like this
return _menu;
}
}

There several callback methods that provide menu as a parameter.
You might wanna manipulate it there.
For example:
onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
onCreateOptionsMenu(Menu menu)
onCreatePanelMenu(int featureId, Menu menu)
There several more, best you take a look in activity documentation and look for your desired method:
http://developer.android.com/reference/android/app/Activity.html

As far as I could understand what you want here is which may help you:
1. Refer this tutorial over option menu.
2. Every time user presses menu button you can check it's title thru getTitle().
3. Or if you want to know the last menu item checked or selected when user has not pressed the menu button then you need to store the preferences when user presses.

Android now has the Toolbar widget which was a Menu you can set/get. Set the Toolbar in your Activity with some variation of setSupportActionBar(Toolbar) for stuff like onCreateOptionsMenu from a Fragment for example. Thread revived!