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 - toolbar and status bar as shared objects with content changes

In my app I set the toolbar and status bar as shared objects as suggested in option #2 in this post
The general behavior and outline of the toolbar and tabs are excellent - the only issue is that when I move to activity B, some of the UI elements of the Toolbar are not participating in the content transition, particularly the Toolbar title and the menu icons.
I tried adding a SharedElementCallback and in it to loop over the children of the toolbar and tabs and add them all to a Fade transition - but it didn't affect the behaviour of the toolbar and tab content.
Any idea how to proceed from here? The desired effect is to have the elements of the Toolbar (title, up button, menu icons) participate in the content transition.
Added screenshots after comment:
Activity A
Activity B

Each activity has your own menu, so you have to create the menu for each one, even if they are the same.
However, if you prefer, you can create just one menu and create a custom class for manipulate the menu; Then you call this custom class on onCreateOptionsMenu and onOptionsItemSelected from whatever activity.
The following code is an example.
Custom class:
public class MenuActionBar {
public static void createOptionsMenu(final Activity activity, Menu menu) {
activity.getMenuInflater().inflate(R.menu.yourmenu, menu);
// Do whatever you wanna do
}
public static boolean optionsItemSelected(Activity activity, MenuItem item) {
// Do whatever you wanna do
}
}
Activity:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuActionBar.createOptionsMenu(this, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
return MenuActionBar.optionsItemSelected(this, item)
? true : super.onOptionsItemSelected(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);

Android - Populate menu upon activity onCreate

Perhaps I'm missing the obvious, but my menu is only been created and populated when onCreateOptionsMenu(Menu menu) is called, as in this example, and this only seem to be called after I press the menu button.
I would like to populate the menu upon the creation of the activity, how can achieve that?
UPDATE:
Perhaps a better question would be:
How can I get the Menu instance of my Activity?
Thanks

Create a class which holds those states then set your enabled/checked etc from the properties of that class in onCreateOptionsMenu()
class MenuStates{
public static boolean userDidPressTheButton;
public static boolean serverDidRespond;
public static boolean colorWasChanged;
}
void someEventHandler(){
MenuStates.userDidPressTheButton = true;
}
void onCreateOptionsMenu(){
myCheckBox.setChecked(MenuStates.userDidPressTheButton);
}
[EDIT]
You don't say why you want to get the menu instance. One approach:
Menu optsMenu;
...
// this is called once only before the end of the Activity onCreate().
onCreateOptionsMenu(Menu menu){
opstMenu = menu;
super.onCreateOptionsMenu(menu);
}
Following that, modify your menu as you wish. Do any "as it pops" up work in onPrepareOptionsMenu().
The key understanding is the difference between onCreateOptionsMenu() and onPrepareOptionsMenu().
[MORE EDIT]
To completely control the thing yourself:
Menu optsMenu;
onCreate(){
openOptionsMenu() // the menu won't show in onCreate but onCreateOptionsMenu is shown
closeOptionsMenu()
}
onCreateOptionsMenu(Menu menu){
optsMenu = menu;
}
onPrepareOptionsMenu(Menu menu){
menu.clear();
for (int i=0;ioptsMenu.size();i++){
menu.add(optsMenu.get(i).getTitle());
}
return super.onPrepareOptionsMenu(menu);
}
From the docs
You can safely hold on to menu (and any items created from it), making modifications to it as desired, until the next time onCreateOptionsMenu() is called.
http://developer.android.com/reference/android/app/Activity.html#onCreateOptionsMenu%28android.view.Menu%29

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!