BottomNavigationView getmaxitemcount

BottomNavigationView getmaxitemcount - java

Hello member stackoverflow
porblem with bottomnavihationview
in my app I used BottomNavigationView with 4 item . it make my app easy and beauty
BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation_view);
bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.action_one:
break;
case R.id.action_two:
FragmentTransaction manger= getSupportFragmentManager().beginTransaction();
pop_web_view pop3 =new pop_web_view();
pop3.show(manger,null);
break;
case R.id.action_three:
break;
case R.id.action_four:
break;
}
return false;
}
});
in activity_main :
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_anchorGravity="bottom"
android:paddingTop="560dp"
app:itemBackground="#color/colorDivider"
app:itemIconTint="#color/colorPrimaryDark"
app:itemTextColor="#color/colorPrimaryDark"
app:menu="#menu/menu_bottom_navigation" />
in menu xml :
<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/action_one"
android:icon="#android:drawable/ic_secure"
android:title="One"/>
<item
android:id="#+id/action_two"
android:icon="#android:drawable/ic_dialog_info"
android:title="Two"/>
<item
android:id="#+id/action_three"
android:icon="#android:drawable/ic_dialog_email"
android:title="Three"/>
<item
android:id="#+id/action_four"
android:icon="#android:drawable/ic_popup_reminder"
android:title="Four"/>
</menu>
BUT I have problem Caused by:
java.lang.IllegalArgumentException: Maximum number of items supported by BottomNavigationView is 5. Limit can be checked with BottomNavigationView#getMaxItemCount()

The error said that maximum number of items supported by BottomNavigationView is 5.
And try to delete
bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation);
because you are already inflating it in
app:menu="#menu/menu_bottom_navigation"
And you are modifying it by calling
bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation);
The documentation says Existing items in the menu will not be modified or removed.
Check this documention
And check this answer
Implementation of BottomNavigationView has condition: when there is more than 3 items then use shift mode.

I know you accepted the current answer, but it's incomplete.
You added a menu in your XML to the BottomNavigationView, then you try to call inflateMenu(...), however, the documentation clearly says:
Existing items in the menu will not be modified or removed.
This means that you are adding menu items to this view, not replacing them.
What you can do to fix it is the following:
bottomNavigationView.getMenu().clear();
bottomNavigationView.inflateMenu(R.menu.menu_bottom_navigation);
Also it's worth mentioning that you do the same things twice: once in the XML (by adding app:menu="..." attribute to the layout item), once in the Java class by calling the inflateMenu(...) method. Delete either of them and it will work. Keep in mind though that if you want to change the menu items later dynamically, you'll need to clear the existing items the way I posted.

In my app I used BottomNavigationView with 2 item, but there are 4 items like this:
My XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/bottom_navigation_constraintlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="0dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
tools:context=".BottomNavigation">
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#android:color/holo_red_dark"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/navigation" />
</android.support.constraint.ConstraintLayout>
and my code:
public class BottomNavigation extends AppCompatActivity {
private static final String TAG = "BottomNavigation";
#Override
protected void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bottom_navigation);
updateMenu();
} catch (Exception e) {
Log.e(TAG, "onCreate: ", e);;
}
}
#UiThread
private void updateMenu() {
BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation);
if (bottomNavigationView != null) {
bottomNavigationView.inflateMenu(R.menu.navigation);
for (Integer i = 0;
i < bottomNavigationView.getMenu().size();
++i ) {
Log.i(TAG, "updateMenu: " + bottomNavigationView.getMenu().getItem(i).getItemId());
}
}
}
}
Delete either of them and it will work. thanks.

Related

Handle clicks on menu item in toolbar in android

How to handle clicks from a toolbar with Navigation Component in android?
I have a MaterialToolbar in an activity with a menu in xml, the menu shows up and accepts clicks but no action is executed.
This is how I initialize the navigation component:
binding = DataBindingUtil.setContentView(this, R.layout.activity_home);
navController = Navigation.findNavController(this, R.id.fragment_container);
appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph())
.setDrawerLayout(binding.activityHome)
.build();
NavigationUI.setupWithNavController(binding.navigationView, navController);
NavigationUI.setupWithNavController(binding.toolBar, navController, appBarConfiguration);
This is my Toolbar menu, it has only one item that will open a DialogFragment:
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/dialog_account"
android:icon="#drawable/icon_account"
android:title="#string/dialog_account"
app:showAsAction="always" />
</menu>
Then this is the dialog in the navigation_graph
<dialog
android:id="#+id/dialog_account"
android:name="my.package.name.dialogs.DialogAccount"
android:label="#string/dialog_account"
tools:layout="#layout/dialog_account" />
This is the activity layout, nothing fancy there:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data></data>
<androidx.drawerlayout.widget.DrawerLayout
android:id="#+id/activity_home"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="end">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimaryDark"
app:layout_constraintBottom_toTopOf="#+id/fragment_container"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.appbar.MaterialToolbar
android:id="#+id/tool_bar"
style="#style/toolbar_style"
app:menu="#menu/toolbar" />
</com.google.android.material.appbar.AppBarLayout>
<fragment
android:id="#+id/fragment_container"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="#dimen/null_dimen"
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/app_bar"
app:navGraph="#navigation/nav_graph" />
</androidx.constraintlayout.widget.ConstraintLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigation_view"
style="#style/navigation_view" />
</androidx.drawerlayout.widget.DrawerLayout>
</layout>
The Activity layout has a NavigationView and a MaterialToolbar, the navigation from the NavigationView works fine, but I can't find a way to open my dialog from the Toolbar even though it seems like is taking clicks but doing nothing. I have tried with onCreateOptionsMenu but it does not get triggered, guess the Navigation Component is working but my dialog is not opening on touching of the menu.
What am I missing here, any hand?

To handle on click on Toolbar simply use "setOnMenuItemClickListener" by providing id of the toolbar.
mToolbar= findViewById(R.id.main_tollbar);
mToolbar.inflateMenu(R.menu.game_menu);
mToolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
switch(item.getItemId()){
case R.id.search_menu:
Toast.makeText(MainActivity.this,"Search Successful",Toast.LENGTH_LONG).show();
break;
case R.id.menus_logout:
Toast.makeText(MainActivity.this,"Logout Successful",Toast.LENGTH_LONG).show();
break;
case R.id.acc_settings:
Toast.makeText(MainActivity.this,"Setting Successful",Toast.LENGTH_LONG).show();
break;
case R.id.about_menu:
Toast.makeText(MainActivity.this,"About Successful",Toast.LENGTH_LONG).show();
break;
case R.id.feedback_menu:
Toast.makeText(MainActivity.this,"Feedback Successful",Toast.LENGTH_LONG).show();
break;
}
return true;
}
});

If you are using the Toolbar (without using setSupportActionBar(toolbar);) you have to use:
NavigationUI.setupWithNavController(toolbar,navController,mAppBarConfiguration);
toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
NavController navController = Navigation.findNavController(context, R.id.nav_host_fragment);
return NavigationUI.onNavDestinationSelected(item, navController);
}
});
In your case it is enough since the id in the menu matches with the id in the navigation graph.
In general you can also use:
public boolean onMenuItemClick(MenuItem item) {
Navigation.findNavController(view).navigate(R.id.action...);
//....
}
Final note: the method onCreateOptionsMenu is only triggered if your are using an ActionBar.

For Navigation component you can use inflator
val view-inflater.inflate(R.Layout.fragment_main, container, false)
view.textview1.setonClickListener{
Navigation.findNavController(view).navigate(R.id.settings)
}

OnOptionsItemSelected doesn't work on android API 19 (but works on android 24)

I have the following code in my activity class
public class admin_fab_features_grid extends
base_activity_for_admin_home_page implements Parcelable {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity_context = getApplicationContext();
Intent iIntent= getIntent();
Bundle b = iIntent.getExtras();
// display the admin_fab_features_grid that contain the dashboard list of all the admin options
setContentView(R.layout.admin_fab_features_grid);
Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar_toolbar);
setSupportActionBar(toolbar);
}
The base_activity_for_admin_home_page.java has the following code
public class base_activity_for_admin_home_page extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(Tag, " Into base activity for parent menu");
_context = getApplicationContext();
// display the admin_fab_features_grid that contain the dashboard list of all the admin options
setContentView(R.layout.admin_fab_features_grid);
Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar_toolbar);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_admin_home_page, menu);
Log.d(Tag, "inflate done");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.actionbar_settings:
return true;
}
}
}
The menu_admin_home_page has the following 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"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".MyActivity">
<item android:id="#+id/actionbar_settings"
android:title="#string/actionbar_settings"
android:orderInCategory="100"
app:showAsAction="never" />
<!--
<item android:id="#+id/actionbar_dropoff"
android:title="#string/actionbar_dropoff"
android:orderInCategory="90"
app:showAsAction="never" />
<item android:id="#+id/actionbar_signin"
android:title="#string/actionbar_signin"
android:orderInCategory="85"
app:showAsAction="never" />
-->
<item android:id="#+id/actionbar_logout"
android:title="#string/actionbar_logout"
android:orderInCategory="80"
app:showAsAction="never" />
</menu>
The "Settings" menu is enabled in the Toolbar. I can see ":" in the Toolbar. On a device that has Android API24 I am able to click on it and the OnOptionsItemSelected function is getting called. But the same application on a device that has Android API 19 the OnOptionsItemSelected does not get called. Can someone help?

change onOptionsItemSelected() to this and try
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.actionbar_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

Since you set the showAsAction attribute to never, then these menu items will never show as action views. Try this:
showAsAction = ifRoom|withText
switch (item.getItemId()) {
case R.id.actionbar_settings:
doyouraction();
return true;
default: return super.onOptionsItemSelected(item);
} }

Solved it after 4 days of pain.
What occurred is that the CoordinatorLayout overlays the GridView on top of the toolbar and that is why the onOptionsItemSelected icons were not getting called. They're being blocked. Toolbar doesn't overlay on-top of the GridView like an actionbar. Its a view itself. To solve this I removed the CoordinatorLayout add an id to the Toolbar and then add android:layout_below="#id/toolbar".
<?xml version="1.0" encoding="utf-8"?>
<!--
// <android.support.design.widget.CoordinatorLayout
-->
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="fab_features.admin_fab_features_grid">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#id/app_bar_toolbar"
style="#style/Widget_v7_Toolbar_style"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.Toolbar
android:id="#id/app_bar_toolbar"
style="#style/Widget_v7_Toolbar_style"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#id/admin_fab_features_grid"
style="#style/admin_fab_features_grid_gridview"
android:layout_below="#id/app_bar_toolbar"
/>
</LinearLayout>

BottomNavigationView with fragments in MVVM way

We have bottom navigation tabs(4) and each tab is having fragment in it. Could anyone help(give idea) how to design the structure in MVVM way with keeping the fragment state for each tab. I know that this is not the place for poor questions but I am looking for conceptual advice. To accomplish it in a best possible way.

With the latest arch components life become so much easer.
Now I don't have to care about keeping my fragments alive as long as I implement business logic (state) inside ViewModel i am fine. It survives the config changes.
If you ask me how about when system kills your app in order to claim the memory,
with latest ViewModel feature you can manage this inside you ViewModel. So you can eliminate extra boilerplate code/communication code between View and ViewModel to pass savedState (e.g id, url, etc..). This would be true separation of concern.

Google (through Nick Butcher‏) announced the release of the v25 of the Android Design Support Library which includes the new BottomNavigationView.
menu.xml
Define navigation items (Fragments items) in the menu resource file
<?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_item1"
android:icon="#drawable/icon1"
android:title="Menu1"
/>
<item
android:id="#+id/action_item2"
android:icon="#drawable/icon2"
android:title="Menu2"/>
<item
android:id="#+id/action_item3"
android:icon="#drawable/icon3"
android:title="Menu3" />
<item
android:id="#+id/action_item4"
android:icon="#drawable/icon4"
android:title="Menu4" />
</menu>
activity_main.xml
ADD the actual BottomNavigationView to the layout.
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:background="#color/colorPrimary"
local:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
local:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<FrameLayout
android:id="#+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/navigation"
android:layout_below="#id/toolbar"
android:animateLayoutChanges="true">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#drawable/rbtn_selector"
android:paddingTop="#dimen/_2sdp"
app:itemIconTint="#drawable/selector_bottom"
app:itemTextColor="#drawable/selector_bottom"
app:elevation="#dimen/_8sdp"
app:menu="#menu/menu"/>
</RelativeLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
bottomNavigationView = (BottomNavigationView)findViewById(R.id.navigation);
//If you want to remove slide animation of bottomview with Helper Class
BottomNavigationViewHelper.removeShiftMode(bottomNavigationView);
Menu m = bottomNavigationView.getMenu();
bottomNavigationView.setOnNavigationItemSelectedListener
(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
if (getSupportActionBar() != null){
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
getSupportActionBar().setHomeButtonEnabled(false);
}
android.app.Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.action_item1:
selectedFragment = Fragment1.newInstance();
toolbar.setTitle("Fragment1");
break;
case R.id.action_item2:
selectedFragment = Fragment2.newInstance();
toolbar.setTitle("Fragment2");
break;
case R.id.action_item3:
selectedFragment = Fragment3.newInstance();
toolbar.setTitle("Fragment3");
break;
case R.id.action_item4:
selectedFragment = Fragment4.newInstance();
toolbar.setTitle("Fragment4");
break;
default:
selectedFragment = Fragment1.newInstance();
toolbar.setTitle("Fragment1");
break;
}
android.app.FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
});
//Manually displaying the first fragment - one time only
android.app.FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, Fragment1.newInstance());
transaction.commit();
}
This Helper class for Remove Shifting animation
static class BottomNavigationViewHelper {
public static void removeShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
item.setShiftingMode(false);
// set once again checked value, so view will be updated
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("ERROR NO SUCH FIELD", "Unable to get shift mode field");
} catch (IllegalAccessException e) {
Log.e("ERROR ILLEGAL ALG", "Unable to change value of shift mode");
}
}
}
Each Fragment as a menu item **Fragmen1.java**
public class Fragmen1 extends android.app.Fragment {
public static Fragmen1 newInstance() {
Fragmen1 fragment = new Fragmen1();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
}

How to set menu to Toolbar in Android

I want use ToolBar instead of ActionBar, but don't show me menu in toolbar!!! i want set menu such as Refresh or Setting buttons in ActionBar.
Toolbar.xml code :
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
app:navigationContentDescription="#string/abc_action_bar_up_description"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:title="Main Page"
android:gravity="center"/>
MainPage.java code:
public class MainPage extends AppCompatActivity {
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_page);
toolbar = (Toolbar) findViewById(R.id.main_toolbar);
setSupportActionBar(toolbar);
if (getSupportActionBar() != null) {
getSupportActionBar().setTitle("Main Page");
}
toolbar.setSubtitle("Test Subtitle");
toolbar.inflateMenu(R.menu.main_menu);
}
}
main_menu.xml code :
<?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/menu_main_setting"
android:icon="#drawable/ic_settings"
android:orderInCategory="100"
app:showAsAction="always"
android:actionLayout="#layout/toolbar"
android:title="Setting" />
<item
android:id="#+id/menu_main_setting2"
android:icon="#drawable/ic_settings"
android:orderInCategory="200"
app:showAsAction="always"
android:actionLayout="#layout/toolbar"
android:title="Setting" />
</menu>
How to fix this problem and show menu in Toolbar ? thanks all dears <3

just override onCreateOptionsMenu like this in your MainPage.java
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}

Don't use setSupportActionBar(toolbar)
I don't know why but this works for me.
toolbar = (Toolbar) findViewById(R.id.main_toolbar);
toolbar.setSubtitle("Test Subtitle");
toolbar.inflateMenu(R.menu.main_menu);
For menu item click do this:
toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
if (item.getItemId() == R.id.item1) {
// do something
} else if (item.getItemId() == R.id.filter) {
// do something
} else {
// do something
}
return false;
}
});
Will update the why part of this answer when I find a proper explanation.

Here is a fuller answer as a reference to future visitors. I usually use a support toolbar but it works just as well either way.
1. Make a menu xml
This is going to be in res/menu/main_menu.
Right click the res folder and choose New > Android Resource File.
Type main_menu for the File name.
Choose Menu for the Resource type.
Paste in the following content as a starter.
<?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_add"
android:icon="#drawable/ic_add"
app:showAsAction="ifRoom"
android:title="Add">
</item>
<item
android:id="#+id/action_settings"
app:showAsAction="never"
android:title="Settings">
</item>
</menu>
You can right click res and choose New image asset to create the ic_add icon.
2. Inflate the menu
In your activity add the following method.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
3. Handle menu clicks
Also in your Activity, add the following method:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_add:
addSomething();
return true;
case R.id.action_settings:
startSettings();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Further reading
Android Menu Documentation

You need to override this code in your Activity:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu, this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main2, menu);
return true;
}
and set your toolbar like this:
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

You can still use the answer provided using Toolbar.inflateMenu even while using setSupportActionBar(toolbar).
I had a scenario where I had to move toolbar setup functionality into a separate class outside of activity which didn't by-itself know of the event onCreateOptionsMenu.
So, to implement this, all I had to do was wait for Toolbar to be drawn before calling inflateMenu by doing the following:
toolbar.post {
toolbar.inflateMenu(R.menu.my_menu)
}
Might not be considered very clean but still gets the job done.

First way:
In activitymain.xml
<androidx.appcompat.widget.Toolbar
android:id="#+id/maintoolbar"
android:layout_width="match_parent"
android:layout_height="56dp"/>
In MainActivity.java
import androidx.appcompat.widget.Toolbar;
private Toolbar toolbar;
Inside onCreate method-
toolbar=findViewById(R.id.maintoolbar);
setSupportActionBar(toolbar);
Inside your MainActivity class-
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.<your menu xml file name here>,menu);
return super.onCreateOptionsMenu(menu);
}
Second way :
//Remove setSupportActionBar(toolbar) and onCreateOptionmenu.
toolbar=findViewById(R.id.maintoolbar);
toolbar.inflateMenu(R.menu.<your menu xml file name here>);

Also you need this, to implement some action to every options of menu.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_help:
Toast.makeText(this, "This is teh option help", Toast.LENGTH_LONG).show();
break;
default:
break;
}
return true;
}

Without ActionBar but with Toolbar
If you want to use a Toolbar instead of the ActionBar, to setSupportActionBar is contradiction in principle as #RohitSingh answered above.
You need neither to use setSupportActionBar nor to override onCreateOptionsMenu and onOptionsItemSelected which are used for the ActionBar.
NoActionBar theme
Place a Toolbar in the layout xml
Prepare a menu xml
Toolbar#inflateMenu (alternatively you can also set a menu in the layout xml)
Toolbar#setOnMenuItemClickListener
Below is an example.
1. NoActionBar theme
(MaterialCompolent.DayNight theme is used in this sample)
<style name="Theme.AppTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
2. Place a Toolbar in the layout
(MaterialToobar is used in this sample)
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.MaterialToolbar
android:id="#+id/toolbar"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
3. Prepare a menu xml
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/item1"
android:title="#string/item1"
app:showAsAction="ifRoom" />
<item
android:id="#+id/item2"
android:title="#string/item2"
app:showAsAction="ifRoom" />
</menu>
4. Toolbar#inflateMenu
binding.toolbar.inflateMenu(R.menu.main); // binding is a ViewBinding
5. Toolbar#setOnMenuItemClickListener
Recent Android recommend to avoid to use switch to differentiate ids. Using a normal if ~ else if ~ else block is desirable. In addition to that, we can use lambda in Java 8.
binding.toolbar.setOnMenuItemClickListener(menuItem -> {
int itemId = menuItem.getItemId();
if (itemId == R.id.item1) {
// do something for item1
return true;
} else if (itemId == R.id.item2) {
// do something for item2
return true;
} else {
// if you do nothing, returning false should be appropriate.
return false;
}
});

Although I agree with this answer, as it has fewer lines of code and that it works:
How to set menu to Toolbar in Android
My suggestion would be to always start any project using the Android Studio Wizard. In that code you will find some styles:-
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
and usage is:
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
Due to no action bar theme declared in styles.xml, that is applied to the Main Activityin the AndroidManifest.xml, there are no exceptions, so you have to check it there.
<activity android:name=".MainActivity" android:screenOrientation="portrait"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
The Toolbar is not an independent entity, it is always a child
view in AppBarLayout that again is the child of
CoordinatorLayout.
The code for creating a menu is the standard code since day one,
that is repeated again and again in all the answers, particularly
the marked one, but nobody realized what is the difference.
BOTH:
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
AND:
How to set menu to Toolbar in Android
WILL WORK.
Happy Coding :-)

In XML add one line inside
<com.google.android.material.appbar.MaterialToolbar app:menu="#menu/main_menu"/>
In java file
Remove three line setSupportActionBar(toolbar); if (getSupportActionBar() != null) { getSupportActionBar().setTitle("Main Page"); }
add one line toolbar.setTitle("Main Page")

In your activity override this method.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
This will inflate your menu below:
<?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/menu_main_setting"
android:icon="#drawable/ic_settings"
android:orderInCategory="100"
app:showAsAction="always"
android:actionLayout="#layout/toolbar"
android:title="Setting" />
<item
android:id="#+id/menu_main_setting2"
android:icon="#drawable/ic_settings"
android:orderInCategory="200"
app:showAsAction="always"
android:actionLayout="#layout/toolbar"
android:title="Setting" />
</menu>

In my case, I'm using an AppBarLayout with a CollapsingToolbarLayout and the menu was always
being scrolled out of the screen, I solved my problem by switching android:actionLayout in menu's XML to
the toolbar's id. I hope it can help people in the same situation!
activity_main.xml
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:fab="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activities.MainScreenActivity"
android:screenOrientation="portrait">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="300dp"
app:elevation="0dp"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingBar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="exitUntilCollapsed|scroll"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="48dp"
>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:elevation="0dp"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
main_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/logoutMenu"
android:orderInCategory="100"
android:title="#string/log_out"
app:showAsAction="never"
android:actionLayout="#id/toolbar"/>
<item
android:id="#+id/sortMenu"
android:orderInCategory="100"
android:title="#string/sort"
app:showAsAction="never"/> </menu>

You can achieve this by two methods
Using XML
Using java
Using XML
Add this attribute to toolbar XML
app:menu = "menu_name"
Using java
By overriding onCreateOptionMenu(Menu menu)
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.demo_menu,menu);
return super.onCreateOptionsMenu(menu);
}
}
for more details or implementating click on the menu go through this article
https://bedevelopers.tech/android-toolbar-implementation-using-android-studio/

You don't actually need to touch the fragment/activity class at all to get a menu inside a toolbar. You can use Rohit Singh's method inside onViewCreated method
import androidx.appcompat.widget.Toolbar
...
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val toolbar = view.findViewById<Toolbar>(R.id.inbox_toolbar)
toolbar.inflateMenu(R.menu.inbox_menu)
}
or
simply define a app:menu element inside the toolbar,
<androidx.appcompat.widget.Toolbar ...
app:menu= "#menu/myMenu" ?>

Simple fix to this was setting showAsAction to always in menu.xml in res/menu
<?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/add_alarm"
android:icon="#drawable/ic_action_name"
android:orderInCategory="100"
android:title="Add"
app:showAsAction="always"
android:visible="true"/>
</menu>

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar;
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_drawer,menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_drawer){
drawerLayout.openDrawer(GravityCompat.END);
if (drawerLayout.isDrawerOpen(GravityCompat.END)) {
drawerLayout.closeDrawer(GravityCompat.END);
} else {
drawerLayout.openDrawer(GravityCompat.END);
}
}
return super.onOptionsItemSelected(item);
}
res/layout/drawer_menu
<?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_drawer"
android:title="#string/app_name"
android:icon="#drawable/ic_menu_black_24dp"
app:showAsAction="always"/>
</menu>
toolbar.xml
<com.google.android.material.appbar.AppBarLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:titleTextColor="#android:color/white"
app:titleTextAppearance="#style/TextAppearance.Widget.Event.Toolbar.Title">
<TextView
android:id="#+id/toolbar_title"
android:layout_gravity="center"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="#string/app_name"
android:textColor="#android:color/white"
style="#style/TextAppearance.AppCompat.Widget.ActionBar.Title" />
</androidx.appcompat.widget.Toolbar>

private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.my_toolbar);
*// here is where you set it to show on the toolbar*
setSupportActionBar(toolbar);
}
Well, you need to set support action bar setSupportActionBar(); and pass your variable, like so: setSupportActionBar(toolbar);

showAsAction="always" does not work when in two-pane mode

I tried setting the menu items in my app as actions with app:showAsAction="always". This works on a phone and also on the tablet when I use the same layout.
But when I use a two-pane layout, the items don't show up in the action bar but in the overflow menu even though there is plenty of room.
Here is the menu xml:
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto" >
<item
android:id="#+id/menu_item_maps"
android:icon="#drawable/ic_action_place"
android:orderInCategory="20"
android:title="#string/maps_menu_item"
app:showAsAction="always">
</item>
<item
android:id="#+id/menu_item_event"
android:icon="#drawable/ic_action_event"
android:orderInCategory="30"
android:title="#string/menu_item_event"
app:showAsAction="always">
</item>
<item
android:id="#+id/menu_item_share_gig"
android:orderInCategory="100"
android:title="#string/menu_item_share"
app:actionProviderClass="android.support.v7.widget.ShareActionProvider"
app:showAsAction="always">
</item>
</menu>
Here is the two-pane layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:baselineAligned="false"
android:divider="?android:attr/dividerHorizontal"
android:orientation="horizontal"
android:showDividers="middle"
>
<fragment
android:id="#+id/gig_list"
android:name="de.nobodyknows.app.GigListFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
<FrameLayout
android:id="#+id/gig_detail_container"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" />
</LinearLayout>
In my code I use the callback method to replace the FrameLayout with a detail fragment:
/**
* Callback method from {#link GigListFragment.Callbacks} indicating that
* the item with the given ID was selected.
*/
#Override
public void onItemSelected(Long id) {
if (mTwoPane) {
// In two-pane mode, show the detail view in this activity by
// adding or replacing the detail fragment using a
// fragment transaction.
Bundle arguments = new Bundle();
arguments.putLong(GigDetailFragment.GIG_ID, id);
GigDetailFragment fragment = new GigDetailFragment();
fragment.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.replace(R.id.gig_detail_container, fragment).commit();
} else {
// In single-pane mode, simply start the detail activity
// for the selected item ID.
Intent detailIntent = new Intent(this, GigDetailActivity.class);
detailIntent.putExtra(GigDetailFragment.GIG_ID, id);
startActivity(detailIntent);
}
}
The detail Fragment inflates the options menu that was shown above:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.detail, menu);
}
Now these menu items show up fine in the phone layout when a new acticity is started. But when the fragment replaces the FrameLayout in the first activity, the menu items just show up in the overflow menu. I can't figure out why that happens, though. Has it something to do with the support library? Or is it something special about how fragments work?
Thanks for your help.

Okay, I found the solution.
My Activity did not extend theActionBarActivityand therefore was not correctly set up to work with MenuItemCompat.
The reason why it still worked on the phone was because that was in a different Activity that correctly extended ActionBarActivity.
To correct this I just replaced the superclass of the Activity that acts as the two-pane Activity to be ActionBarActivity.

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