How can I access my Menu from my fragment and then change the icon of one of the menu items there?
What I am doing is querying my local DB to see if a certain entry exists when the fragment is shown. If it does display a solid icon, if not, display an outlined icon.
In your fragments onCreate() method you can use setHasOptionsMenu(true) to allow your fragment to handle different menu items than it's root Activity.
So you could do something like this in your fragment:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
And then, you can override any of the menu life-cycle methods in your fragment:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.menu_fragment, menu);
// You can look up you menu item here and store it in a global variable by
// 'mMenuItem = menu.findItem(R.id.my_menu_item);'
}
#Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
MenuItem menuItem = menu.findItem(R.id.menu_item_to_change_icon_for); // You can change the state of the menu item here if you call getActivity().supportInvalidateOptionsMenu(); somewhere in your code
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
// Handle actions based on the id field.
}
I found a simpler way of doing it than in the provided answer:
Toolbar toolbar = requireActivity().findViewById(R.id.toolbar);
Menu menu = toolbar.getMenu();
MenuItem item = menu.findItem(R.id.item_settings);
item.setIcon(R.drawable.ic_settings);
Access the menu from the toolbar.
I am trying to show a button in the actionbar when a Fragment is shown and to hide the button when the other Fragment are shown.
I Override the onCreateOptionsMenu method:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
MenuItem item= menu.findItem(R.id.action_example);
item.setVisible(true);
super.onCreateOptionsMenu(menu,inflater);
}
And use setHasOptionMenu(true):
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
I have done a test and I noticed that initially the button doesn't appear in the other Fragment , but after I open the Fragment in which I put this code above, the button is shown also in the other Fragment.
What you are missing is removing the optionsMenu in the onDestroy of the fragment. The behaviour you describe is logical with your code: when the Fragment is created you also create the options menu. It will not automatically be destroyed when the Fragment is destroyed.
I've got three fragments in a viewpager.
Two of these fragments have their own version of the onCreateOptionsMenu method:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
// Set up 1 action button
inflater.inflate(R.menu.home_snapshot_add, menu);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
// Set up 2 action buttons
inflater.inflate(R.menu.home_snapshot_send, menu);
}
The home activity has a basic onCreateOptionsMenu method:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return false;
}
In the onCreate method, each fragment calls the method:
setHasOptionsMenu(true);
Each of the menu items have the tag:
android:showAsAction="always"
Seems like as I open the Activity, all three buttons appear.
However, when I scroll through them, the wrong ones magically disappear.
It feels like the activity is calling every Fragment's options menu on Activity creation and then changes the menu appropriately when I swipe left and right.
I've checked the menus but not sure what's wrong.
Anything you reckon I need to check? I'm a little out of ideas.
Thanks!
In your ViewPager's OnPageChangeListener and after setting the adapter to the ViewPager, have this:
#Override
public void onPageSelected(int position){
invalidateFragmentMenus(position);
}
private void invalidateFragmentMenus(int position){
for(int i = 0; i < mViewPagerFragentAdapter.getCount(); i++){
mViewPagerAdapter.getItem(i).setHasOptionsMenu(i == position);
}
invalidateOptionsMenu(); //or respectively its support method.
}
After setting your fragment adapter call the same method with following argument:
invalidateFragmentMenus(mViewPager.getCurrentItem());
The above statements will prevent all other fragments not to receive call on onCreateOptionsMenu() method when invalidateOptionsMenu() is called, only the currently visible fragment will receive and be able to populate the options menu.
I've used this and it has worked for me:
//In your Fragment
#Override
public void onResume() {
super.onResume();
setHasOptionsMenu(isVisible());
}
I have a Sherlock Fragment Activity in which there are 3 Fragments.
Fragment A, Fragment B, Fragment C are three fragments. I want to show a done option menu in Fragment B only.
And the activity is started with Fragment A. When Fragment B is selected done button is added.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if(!menusInflated){
inflater.inflate(R.menu.security, menu);
menusInflated=true;
}
super.onCreateOptionsMenu(menu, inflater);
}
When I again start Fragment A I want to options Menu DONE (which was set at Fragment B) for this I am doing like this
setHasOptionsMenu(false);
MenuItem item = (MenuItem) menu.findItem(R.id.done_item);
item.setVisible(false);
But this is not hiding at all, also it is giving NullPointerException when Activity if first started with Fragment A.
Please let me know what is the problem.
Try this...
You don't need to override onCreateOptionsMenu() in your Fragment class again. Menu items visibility can be changed by overriding onPrepareOptionsMenu() method available in Fragment class.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public void onPrepareOptionsMenu(Menu menu) {
menu.findItem(R.id.action_search).setVisible(false);
super.onPrepareOptionsMenu(menu);
}
This is one way of doing this:
add a "group" to your menu:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<group
android:id="#+id/main_menu_group">
<item android:id="#+id/done_item"
android:title="..."
android:icon="..."
android:showAsAction="..."/>
</group>
</menu>
then, add a
Menu menu;
variable to your activity and set it in your override of onCreateOptionsMenu:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
this.menu = menu;
// inflate your menu here
}
After, add and use this function to your activity when you'd like to show/hide the menu:
public void showOverflowMenu(boolean showMenu){
if(menu == null)
return;
menu.setGroupVisible(R.id.main_menu_group, showMenu);
}
I am not saying this is the best/only way, but it works well for me.
To show action items (action buttons) in the ActionBar of fragments where they are only needed, do this:
Lets say you want the save button to only show in the fragment where you accept input for items and not in the Fragment where you view a list of items, add this to the OnCreateOptionsMenu method of the Fragment where you view the items:
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (menu != null) {
menu.findItem(R.id.action_save_item).setVisible(false);
}
}
NOTE: For this to work, you need the onCreate() method in your Fragment (where you want to hide item button, the item view fragment in our example) and add setHasOptionsMenu(true) like this:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
Might not be the best option, but it works and it's simple.
This will work for sure I guess...
// Declare
Menu menu;
MenuItem menuDoneItem;
// Then in your onCreateOptionMenu() method write the following...
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
this.menu=menu;
inflater.inflate(R.menu.secutity, menu);
}
// In your onOptionItemSelected() method write the following...
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.done_item:
this.menuDoneItem=item;
someOperation();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
// Now Making invisible any menu item...
public void menuInvisible(){
setHasOptionsMenu(true);// Take part in populating the action bar menu
menuDoneItem=(MenuItem)menu.findItem(R.id.done_item);
menuRefresh.setVisible(false); // make true to make the menu item visible.
}
//Use the above method whenever you need to make your menu item visible or invisiable
You can also refer this link for more details, it is a very useful one.
MenuItem Import = menu.findItem(R.id.Import);
Import.setVisible(false)
Try this
#Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.custom_actionbar, menu);
menu.setGroupVisible(...);
}
By setting the Visibility of all items in Menu, the appbar menu or overflow menu will be Hide automatically
Example
private Menu menu_change_language;
...
...
#Override
public boolean onCreateOptionsMenu(Menu menu) {
...
...
menu_change_language = menu;
menu_change_language.findItem(R.id.menu_change_language).setVisible(true);
return super.onCreateOptionsMenu(menu);
}
Before going to other fragment use bellow code:
if(menu_change_language != null){
menu_change_language.findItem(R.id.menu_change_language)
.setVisible(false);
}
Hello I got the best solution of this, suppose if u have to hide a particular item at on create Menu method and show that item in other fragment. I am taking an example of two menu item one is edit and other is delete. e.g menu xml is as given below:
sell_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/action_edit"
android:icon="#drawable/ic_edit_white_shadow_24dp"
app:showAsAction="always"
android:title="Edit" />
<item
android:id="#+id/action_delete"
android:icon="#drawable/ic_delete_white_shadow_24dp"
app:showAsAction="always"
android:title="Delete" />
Now Override the two method in your activity & make a field variable mMenu as:
private Menu mMenu; // field variable
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.sell_menu, menu);
this.mMenu = menu;
menu.findItem(R.id.action_delete).setVisible(false);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.action_delete) {
// do action
return true;
} else if (item.getItemId() == R.id.action_edit) {
// do action
return true;
}
return super.onOptionsItemSelected(item);
}
Make two following method in your Activity & call them from fragment to hide and show your menu item. These method are as:
public void showDeleteImageOption(boolean status) {
if (menu != null) {
menu.findItem(R.id.action_delete).setVisible(status);
}
}
public void showEditImageOption(boolean status) {
if (menu != null) {
menu.findItem(R.id.action_edit).setVisible(status);
}
}
That's Solve from my side,I think this explanation will help you.
You can make a menu for each fragment, and a global variable that mark which fragment is in use now.
and check the value of the variable in onCreateOptionsMenu and inflate the correct menu
#Override
public boolean onCreateOptionsMenu(Menu menu) {
if (fragment_it == 6) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.custom_actionbar, menu);
}
}
Okay I spend couple of hour to get this solution.apparently you can get menuitem from your toolbar to anywhere in activity or fragment. So in my case.
var menuItem = toolbar.menu;
Now to get specfic item from menu item
favIcon = menuItem.findItem(R.id.favourite);
Note: favIcon is MenuItem declare global
Now if you can do whatever you want to do for this icon
eg. to make it invisible
favIcon?.isVisible=false
Even though the question is old and answered. There is a simpler answer to that than the above mentioned. You don't need to use any other variables.
You can create the buttons on action bar whatever the fragment you want, instead of doing the visibility stuff(show/hide).
Add the following in the fragment whatever u need the menu item.
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
Sample menu.xml file:
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="#+id/action_addFlat"
android:icon="#drawable/add"
android:showAsAction="ifRoom|withText"
android:title="#string/action_addFlat"/>
</menu>
Handling onclick events is as usual.
Late to the party but the answers above didn't seem to work for me.
My first tab fragment (uses getChildFragmentManager() for inner tabs) has the menu to show a search icon and uses android.support.v7.widget.SearchView to search within the inner tab fragment but navigating to other tabs (which also have inner tabs using getChildFragmentManager()) would not remove the search icon (as not required) and therefore still accessible with no function, maybe as I am using the below (ie outer main tabs with each inner tabs)
getChildFragmentManager();
However I use the below in my fragments containing/using the getChildFragmentManager() for inner tabs.
//region onCreate
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
//access setHasOptionsMenu()
setHasOptionsMenu(true);
}
//endregion onCreate
and then clear the menu item inside onPrepareOptionsMenu for fragments(search icon & functions)
#Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
//clear the menu/hide the icon & disable the search access/function ...
//this will clear the menu entirely, so rewrite/draw the menu items after if needed
menu.clear();
}
Works well and navigating back to the tab/inner tab with the search icon functions re displays the search icon & functions.
Hope this helps...
For some reason the method was not working for me this is how I solved it according to the accepted solution
//This should be in on create
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
showOverflowMenu(false);
}
},100);
#Override
public boolean onCreateOptionsMenu(Menu menu) {
this.menu = menu;
getMenuInflater().inflate(R.menu.options_menu, menu);
return true;
}
public void showOverflowMenu(boolean showMenu){
if(menu == null)
return;
menu.setGroupVisible(R.id.grp, showMenu);
}
I am having trouble getting the following piece of code to work out. I have a viewpager with 3 fragments, and I want a search icon to only show up on one. I started off trying to add the search function by the fragment, but the rendering of the menu item was slow when swiping to that page. I am now on the part to add the search icon to the activity, and then just hide or show depending on which viewpager page is active, but the following is not working:
public class MyApp extends FragmentActivity implements
FragmentTeams.FragmentNotification,ViewPager.OnPageChangeListener,
OnNavigationListener{
...
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
menuSearch = menu.findItem(R.id.menu_search);
mSearchView = new SearchView(this);
menuSearch.setActionView(mSearchView);
menuSearch.setVisible(false);
return true;
}
#Override
public void onPageSelected(int pageNum) {
if(pageNum== 1){
ActionBar actionBar = MyApp.this.getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
menuSearch.setVisible(true);
invalidateOptionsMenu();
}else{
ActionBar actionBar = MyApp.this.getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
menuSearch.setVisible(false);
invalidateOptionsMenu();
}
}
While the above does (appear to) create and hide the icon at onCreateOptionsMenu, it is not reenabled when moving to
pageNum ==1
Can anyone give me some insight as to why this may be happening?
invalidateOptionsMenu make the system calls the method onPrepareOptionsMenu, so you can override this method as follows:
public boolean onPrepareOptionsMenu(Menu menu) {
int pageNum = getCurrentPage();
if (pageNum == 1) {
menu.findItem(R.id.menu_search).setVisible(true);
}
else {
menu.findItem(R.id.menu_search).setVisible(false);
}
}
public void onPageSelected(int pageNum) {
invalidateOptionsMenu();
}
You can implement onCreateOptionsMenu() in your Fragment and set 'setHasOptionsMenu(true)' for the fragment
a possible solution for this problem would be inflating your custom menu inside the activity hosts your ViewPager and getting 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 easily hide/show the menu's items without any delay inside onPageSelected method as below:
#Override
public void onPageSelected(int position) {
switch (position) {
case 0: {
customMenu.getItem(0).setVisible(false);
break;
}
case 1: {
customMenu.getItem(0).setVisible(true);
break;
}
}
I used Nermeen's answer and managed to get it without any delay.
I don't inflate anything in onCreateOptionsMenu, but use it to get a reference to the menu:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
customMenu = menu;
return super.onCreateOptionsMenu(menu);
}
Then, in onPrepareOptionsMenu(), I call the viewpager getCurrentItem() (should be something like viewPager.getCurrentItem()), call invalidateOptionsMenu() and inflate whatever menu I want in that page using the customMenu reference I created in onCreateOptionsMenu().