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Why option menu does not show in this code

Why option menu does not show in this code while option menu declear in Blank fragment
BasicActivity.java - Here my first entry code
public class BasicActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_basic);
FragmentLoader.loadFragment(this, R.id.container, new BlankFragment());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
boolean retVal = super.onCreateOptionsMenu(menu);
return retVal;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_basic.xml xml file of activity basic
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".BasicActivity">
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
BlankFragment.java - when i include toolbar option it appers but option menu in this fragment doesnot appear
public class BlankFragment extends Fragment {
private static final String TAG = BlankFragment.class.getName();
// TODO: Customize parameter initialization
#SuppressWarnings("unused")
public static BlankFragment newInstance( ) {
BlankFragment fragment = new BlankFragment();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container,
#Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_blank, container, false);
return view;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.episodes, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
}
fragment_blank.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".BlankFragment" >
<!-- tools:context=".MainActivity2">-->
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="180dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:ignore="InconsistentLayout"
android:theme="#style/Theme.Fragment.AppBarOverlay"
android:fitsSystemWindows="true" >
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/chat_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
android:background="#color/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<ImageView
android:id="#+id/mainAppbarImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:minHeight="?actionBarSize"
android:padding="10dp"
android:text="#string/app_name"
android:textAppearance="#style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/Theme.Fragment.PopupOverlay" >
<!-- <include layout="#layout/layout_main_toolbar" />-->
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/chat_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#mipmap/ic_forward"
app:backgroundTint="#color/colorPrimary"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Hide menu item conditionally in Toolbar using DialogFragment

I'm doing a mobile application in Android with JAVA using a DialogFragment with Toolbar.
I want to hide a menu item conditionally.
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_favorite"
android:title="favorite"
android:icon="#drawable/ic_favorite_white_off_24dp"
app:showAsAction="always" />
<item
android:id="#+id/action_delete"
android:title="delete"
android:icon="#drawable/ic_delete_white_24dp"
app:showAsAction="always" />
<item
android:id="#+id/action_save"
android:title="save"
app:showAsAction="always" />
</menu>
Layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:elevation="0dp">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:paddingStart="6dp"
android:paddingEnd="16dp"
app:contentInsetStartWithNavigation="0dp"
app:navigationIcon="#drawable/ic_close_black_24dp" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<!-- EditText's and buttons ..... -->
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
DialogFragment
public class MyDialogFragment extends DialogFragment implements Toolbar.OnClickListener, Toolbar.OnMenuItemClickListener {
public static final String TAG = "my_dialog";
private Toolbar toolbar;
public static MyDialogFragment display(FragmentManager fragmentManager) {
NewPersonDialogFragment exampleDialog = new NewPersonDialogFragment();
exampleDialog.show(fragmentManager, TAG);
return exampleDialog;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(NewPersonDialogFragment.STYLE_NORMAL, R.style.AppTheme_FullScreenDialog);
}
#Override
public void onStart() {
super.onStart();
Dialog dialog = getDialog();
if (dialog != null) {
int width = ViewGroup.LayoutParams.MATCH_PARENT;
int height = ViewGroup.LayoutParams.MATCH_PARENT;
dialog.getWindow().setLayout(width, height);
dialog.getWindow().setWindowAnimations(R.style.AppTheme_Slide);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.dialog_fragment_new_person, container, false);
return view;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
toolbar = view.findViewById(R.id.toolbar);
toolbar.inflateMenu(R.menu.new_person_dialog_menu);
toolbar.setNavigationOnClickListener(this);
toolbar.setOnMenuItemClickListener(this);
toolbar.setTitle("Add new");
}
#Override
public void onClick(View v) {
// This is working fine
}
#Override
public boolean onMenuItemClick(MenuItem item) {
// This is working fine
switch (item.getItemId()) {
case R.id.action_favorite:
return true;
case R.id.action_delete:
return true;
case R.id.action_save:
return true;
default:
return false;
}
}
#Override
public void onCreateOptionsMenu(#NonNull Menu menu, #NonNull MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
// Removing item doesn't work!
menu.removeItem(R.id.action_delete);
}
}
I open the DialogFragment like this:
MyDialogFragment.display(getActivity().getSupportFragmentManager());
When I open the DialogFragment, the menu item is not hidden.
As other topics says, I have tried:
setHasOptionsMenu(true) in onActivityCreated method.
getActivity().invalidateOptionsMenu() in onPrepareOptionsMenu method.
My goal is to hide/remove a menu item based on a condition when the user opens the DialogFragment.

Add Toolbar inside fragment (AndroidX)

I am trying to add ActionBar (Toolbar) inside fragment and then set Button to "end" of this action bar and add onClickListener on that button.
Cannot use support.v7.widget.ToolBar (I dont know why but I could not implement it)so I had to use androidx.appcompat.widget.Toolbar instead.
I could not find any source to follow.
app_bar_layout.xml:
<androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main_app_toolbar"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
</androidx.appcompat.widget.Toolbar>
Fragment's design fragment_wall.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".WallFragment"
android:background="#color/colorWhite">
<include
android:id="#+id/update_wall_page_toolbar"
layout="#layout/app_bar_layout"></include>
</FrameLayout>
Code in WallFragment.java
public class WallFragment extends Fragment {
public WallFragment() {
// Required empty public constructor
}
private Toolbar TopActivityToolbar;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_wall, container, false);
TopActivityToolbar = v.findViewById(R.id.update_wall_page_toolbar);
TopActivityToolbar.setTitle("Príspevky");
TopActivityToolbar.setLogo(ContextCompat.getDrawable(getActivity(),R.drawable.ic_add_circle_black_24dp));
return v;
}
}

so what was the successfull answer for me:
Inside onCreate method just add setHasOptionsMenu(true);
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
Inside my WallFragment.java in onCreateView I added setOnMenuItemClickListener just right after initializing the Toolbar
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View inflatedView = inflater.inflate(R.layout.fragment_wall, container, false);
TopActivityToolbar = inflatedView.findViewById(R.id.update_wall_page_toolbar);
TopActivityToolbar.setTitle("someTitle");
TopActivityToolbar.inflateMenu(R.menu.menu_app_actionbar_wall);
// and finally set click listener
TopActivityToolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
// Your code inside Toolbar onClick...
return false;
}
});
return inflatedView;
}
Do not forget to to INFLATE the menu from res/menu/...

Add Toolbar inside fragment (AndroidX),you should use the onCreateOptionsMenu() method inside fragment.
#Override
public void onCreateOptionsMenu(
Menu menu, MenuInflater inflater) {inflater.inflate(R.menu.example_menu, menu);
}
First,you have to call setHasOptionsMenu() within the fragment's onCreate() method:
setHasOptionsMenu(true);
//For handling item selection
You can handle menu item clicks in the onOptionsItemSelected() method:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.itemId:
//action
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Full Example code is below:
In this example One activity: Main activity:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="200dp"
android:id="#+id/fragment_id"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click"
android:onClick="changeFragment"
android:layout_gravity="center"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
FrameLayout frameLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loadFragment(new FirstFragment());
}
private void loadFragment(Fragment fragment) {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_id, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
public void changeFragment(View view) {
loadFragment(new SecondFragment());
}
}
There is two fragment in this example:
FirstFragment and SecondFragment.
FirstFragment.java :
public class FirstFragment extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.first_layout,container,false);
return view;
}
#Override
public void onCreateOptionsMenu(
Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.first_item_menu, menu);
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
//For handling item selection
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.itemId:
Toast.makeText(getContext(),"First Fragment item",Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
SecondFragment.java
public class SecondFragment extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.second_frag,container,false);
return view;
}
#Override
public void onCreateOptionsMenu(
Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.second_item_menu, menu);
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
//For handling item selection
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.itemId1:
Toast.makeText(getContext(),"Second Fragment item",Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
In menu file,app:showAsAction="ifRoom" in your menu item.Below is example code for menu file.
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="#+id/itemId"
android:icon="#drawable/ic_apps_black_24dp"
android:title="First"
app:showAsAction="ifRoom">
</item>
</menu>

First of all, to make it work you need to call this code in onCreateView callback of fragment that is needed to have a menu;
setHasOptionsMenu(true);
Then you are able to inflate the menu and set listener to handle clicks on item:
inflater.inflate(*R.menu.your_menu_resource*, menu);
After that you are able to override onCreateOptionsMenu and onOptionsItemSelected to provide logic that is needed:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.toolbar, menu);
super.onCreateOptionsMenu(menu, inflater);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.toolbar_seetings) {
Toast.makeText(getContext(), "Menu item was clicked", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
After that you just need to handle App Bar visibility, so you need to place the code in onCreateView and it will look like that:
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
setHasOptionsMenu(true);
((AppCompatActivity) getActivity()).getSupportActionBar().show();
return inflater.inflate(R.layout.fragment_home, container, false);
}

Android: block options menu while collapsing toolbar

I have collapsing toolbar with options menu in fragment. When I collapse my toolbar, menu move above status bar. So, after collapse, I doesn't see
menu options. I show it in screenshots:
Here my .xml code:
<android.support.design.widget.CoordinatorLayout
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">
<android.support.design.widget.AppBarLayout
android:id="#+id/abl_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/ctl_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|snap|exitUntilCollapsed"
app:contentScrim="?attr/colorPrimary">
<ImageView
android:id="#+id/iv_avatar"
android:layout_width="match_parent"
android:layout_height="220dp"
android:src="#drawable/ic_main_logo"
android:scaleType="centerInside"
android:background="#drawable/shape_profile_avatar_background"
app:layout_collapseMode="parallax"/>
<include layout="#layout/component_transparent_toolbar"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_results"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/btn_avatar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:elevation="4dp"
app:elevation="4dp"
app:srcCompat="#drawable/vector_photo_camera_black_24dp"
app:layout_anchor="#id/abl_toolbar"
app:layout_anchorGravity="bottom|right|end"/>
<include layout="#layout/component_profile_avatar_bottom_sheet" />
Here my code from fragment:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
mActivity = (MainActivity) getActivity();
mAdapter = new ProfileRVAdapter();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile, parent, false);
mIVAvatar = (ImageView) view.findViewById(R.id.iv_avatar);
LinearLayoutManager manager = new LinearLayoutManager(mActivity);
RecyclerView rvResults = (RecyclerView) view.findViewById(R.id.rv_results);
rvResults.setLayoutManager(manager);
rvResults.setAdapter(mAdapter);
Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
toolbar.setTitle(R.string.activity_main_profile_label);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
toolbar.setPadding(0, mActivity.getStatusBarHeight(), 0, 0);
toolbar.getLayoutParams().height = toolbar.getLayoutParams().height + mActivity.getStatusBarHeight();
}
mActivity.setSupportActionBar(toolbar);
view.findViewById(R.id.btn_avatar).setOnClickListener(this);
view.findViewById(R.id.btn_cancel).setOnClickListener(this);
view.findViewById(R.id.btn_gallery).setOnClickListener(this);
view.findViewById(R.id.btn_photo).setOnClickListener(this);
mBottomSheet = BottomSheetBehavior.from(view.findViewById(R.id.ll_bottom_sheet));
mBottomSheet.setState(BottomSheetBehavior.STATE_HIDDEN);
return view;
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_profile, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_edit:
return true;
case R.id.menu_logout:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Any idea why it has happened?
Edited / SOLVED:
I solved my problem. Mistake was in toolbar attributes, I forgot app:layout_collapseMode="pin".

Set design code of Toolbar in layout.xml code in Activity's layout file &
set toolbar as below in Activity Code,
Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Add this line of code in Activity file.

ArrayAdapter not binding data to ListView

I am trying learn Android and building a very basic ListView, the data set up using ArrayAdapter is not showing up. My Activity code is:
MainActivity Class(default no changes)
`public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}`
**MainActivityFragment class**
public class MainActivityFragment extends Fragment {
private ListAdapter arrayAdapter;
public MainActivityFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ArrayList<String> myEntries = new ArrayList<String>();
myEntries.add("Unix");
myEntries.add("Java");
myEntries.add("Android");
arrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.list_item_forecast, R.id.list_forecast_item_textview, myEntries);
ListView listView = (ListView)inflater.inflate(R.layout.fragment_main, container, false).findViewById(R.id.list_view_forecast);
listView.setAdapter(arrayAdapter);
return inflater.inflate(R.layout.fragment_main, container, false);
}
}
list_item_forecast.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:minHeight="?android:listPreferredItemHeight"
android:gravity="center_vertical"
android:text=""
android:id="#+id/list_forecast_item_textview">
</TextView>
fragment_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:showIn="#layout/activity_main"
tools:context=".MainActivityFragment"
android:id="#+id/forecastFragment">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/list_view_forecast" />
<include layout="#layout/list_item_forecast" />
</FrameLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:layout_width="match_parent"
android:layout_height="match_parent" android:fitsSystemWindows="true"
tools:context=".MainActivity">
<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/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>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton android:id="#+id/fab"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_gravity="bottom|end" android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
All my application code is as above. I have tried tweaking the code and also tried this link but cannot get this to work. Please help.

The listview you setAdapter is not the listview you return in the fragment.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ArrayList<String> myEntries = new ArrayList<String>();
myEntries.add("Unix");
myEntries.add("Java");
myEntries.add("Android");
arrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.list_item_forecast, R.id.list_forecast_item_textview, myEntries);
View view =inflater.inflate(R.layout.fragment_main, container, false);
ListView listView = (ListView)view .findViewById(R.id.list_view_forecast);
listView.setAdapter(arrayAdapter);
return view ;
}