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Back arrow isn't shown in #layout/toolbar markup

I have a problem. I wanted to create a back arrow, but it doesn't show. The title also doesn't show. I created the toolbar with an extra .xml file. So I hope you can help me, guys! Thanks in advance.
These are my files:
Files
This is my standard screen:
Standard screen
This is my settings screen:
setting screen
SettingsActivity.java
public class SettingsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("My title");
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
int id = item.getItemId();
if (id == android.R.id.home)
{
onBackPressed();
return true;
}
else
{
return super.onOptionsItemSelected(item);
}
}
}
activity_settings.xml
<?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=".SettingsActivity">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello Settings!"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
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/menu_info"
android:icon="#drawable/ic_info_white_24dp"
android:title="Info"
app:showAsAction="ifRoom"/>
<item android:id="#+id/menu_settings"
android:icon="#drawable/ic_settings_white_24dp"
android:title="Settings"
app:showAsAction="ifRoom"/>
</menu>
style.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="MyActionButtonOverflow" parent="android:style/Widget.Holo.Light.ActionButton.Overflow">
<item name="android:src">#drawable/ic_settings_white_24dp</item>
<item name="android:contentDescription">"Lala"</item>
</style>
</resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".SettingsActivity"
android:parentActivityName=".MainActivity"></activity>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
toolbar.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#color/colorPrimary"
android:elevation="4dp"
app:titleTextColor="#fff">
</androidx.appcompat.widget.Toolbar>
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch(item.getItemId()) {
case R.id.menu_info:
Toast.makeText(this, "Info", Toast.LENGTH_LONG).show();
return true;
case R.id.menu_settings:
setContentView(R.layout.activity_settings);
return true;
}
return super.onOptionsItemSelected(item);
}
}

Hi Change the following in your code
Add this line to setting class setSupportActionBar(toolbar);

I never called the right SettingsActivity.java
So change
setContentView(R.layout.activity_settings);
to
Intent intentAccess = new Intent(getApplicationContext(), SettingsActivity.class);
startActivity(intentAccess);

Toolbar mToolbar = findViewById(R.id.toolbar);
(AppCompatActivity) setSupportActionBar(mToolbar);
(AppCompatActivity) getSupportActionBar().setDisplayHomeAsUpEnabled(true);
(AppCompatActivity) getSupportActionBar().setDisplayShowHomeEnabled(true);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onBackPressed();
}
});

Items in menu not showing action bar, rather being displayed without any icons in three dots

Previously my app name was being displayed hence I had to use getSupportActionBar().setDisplayShowTitleEnabled(false) to remove the text, but now in its place a blank action is displayed with three dots on the side showing the list items that I have defined.
I want Refresh and Back actions to be displayed directly into the action bar with their respective icons
eventdetails.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/action_refresh"
app:showAsAction="always"
android:title="Refresh"
android:icon="#drawable/ic_action_refresh"
/>
<item
android:id="#+id/action_settings"
android:title="Settings"
app:showAsAction="ifRoom"
>
</item>
<item
android:id="#+id/action_back"
android:title="Back"
android:icon="#drawable/ic_action_back"
app:showAsAction="always"
/>
</menu>
EventDetails.java
public class EventDetails extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_event_details);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbarEventDetails);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.eventdetails, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case R.id.action_back:
Intent action_back = new Intent(EventDetails.this, EventView.class);
startActivity(action_back);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}

Your xmlns:app is not setup properly
change:
xmlns:app="schemas.android.com/apk/res-auto"
to
xmlns:app="http://schemas.android.com/apk/res-auto"

Android Action Bar and Menu Options are missing

I am having difficulty with showing my Action bar that is suppose to be at the top. Everytime I use a ListView, the ActionBar with all my menu options on top disappears on me. Can someone shed some light on why this happening with the ListView.
MainActivity Class:
public class MainActivity extends Activity {
ListView listView;
ArrayAdapter<String> adapter;
String[] android_versions = {"Cupcake",
"Donut",
"Eclair",
"Froyo",
"Gingerbread",
"Honeycomb",
"Ice Cream Sandwich",
"Jelly Bean",
"KitKat",
"Lollipop"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android_versions);
listView.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.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);
}
}
Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.farrellequipment.www.listview" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Layout activity_main.xml file:
<RelativeLayout 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=".MainActivity">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listView"
android:layout_gravity="left|top" />
</RelativeLayout>
Menu menu_main.xml file
<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=".MainActivity">
<item android:id="#+id/action_settings" android:title="#string/action_settings"
android:orderInCategory="100" app:showAsAction="never" />
</menu>
Styles.xml file
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
</resources>
It is a simple straight forward app but I am missing the ActionBar and Menu Options I need for this app. Again can someone please shed some light on the problem. I have been searching this problem for about 4 hours now and I need help. Thank you in advance.

You just need to replace Activity to AppCompatActivity
public class MainActivity extends AppCompatActivity {
ListView listView;
ArrayAdapter<String> adapter;
String[] android_versions = {"Cupcake",
"Donut",
"Eclair",
"Froyo",
"Gingerbread",
"Honeycomb",
"Ice Cream Sandwich",
"Jelly Bean",
"KitKat",
"Lollipop"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android_versions);
listView.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.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);
}

Your #style/AppTheme probably extends a .NoActionBar theme, make sure that's not the case.

You should inherit your Activity from AppCompatActivity (https://developer.android.com/reference/android/support/v7/app/AppCompatActivity.html) from the Support Library instead from the plain Acitivty class.
You should also inherit your app theme from Theme.AppCompat.
See also Difference between extending LifecycleActivity,Activity,ActionbarActivity & AppCompactActivity?

Android app Share button not showing up

I have create a new app and I want to show the SHARE button on the right side of the top bar. It used to work with previous apps but in this last one isn't displaying the share icon and I don't know why:
res/menu/main.xml
<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" >
<item
android:id="#+id/action_settings"
android:orderInCategory="100"
android:title="#string/action_settings"
app:showAsAction="never"/>
<item
android:id="#+id/share"
android:showAsAction="always"
android:title="#string/action_share"
android:icon="#android:drawable/ic_menu_share"
/>
</menu>
MainActivity.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);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case R.id.share:
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_SUBJECT, "subject");
shareIntent.putExtra(Intent.EXTRA_TEXT, "text");
startActivity(Intent.createChooser(shareIntent, "Share Via"));
break;
default:
break;
}
return true;
}
I don't know if this is important, but I have this target on the manifest:
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="21" />
Any help is REALLY appreciated.

SearchView doesn't start the SearchableActivity

I want to add a SearchView to my ActionBar, so I've done as in Google Tutorial reported here.
AndroidManifest.xml
<activity
android:name="it.polimi.dima.sound4u.activity.SoundSearchActivity"
android:label="#string/title_activity_sound_search" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
</activity>
<activity
android:name="it.polimi.dima.sound4u.activity.MyGiftsActivity"
android:label="#string/title_activity_my_gifts" >
<meta-data android:name="android.app.searchable"
android:resource="#xml/searchable" />
</activity>
searchable.xml
<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="#string/app_name"
android:hint="#string/search_hint" />
MyGiftsActivity.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.my_gifts, menu);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.search:
onSearchRequested();
return true;
case R.id.action_logout:
doLogout();
return true;
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
my_gifts.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/search"
android:title="#string/search_title"
android:icon="#drawable/ic_action_search"
android:showAsAction="collapseActionView|ifRoom"
android:actionViewClass="android.widget.SearchView" />
<item android:id="#+id/action_logout"
android:title="#string/logout_label"
android:showAsAction="ifRoom" />
<item android:id="#+id/action_settings"
android:title="#string/action_settings"
android:orderInCategory="100"
app:showAsAction="never" />
</menu>
SoundSearchActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sound_search);
handleIntent(getIntent());
}
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
handleIntent(intent);
}
private void handleIntent(Intent intent) {
if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
String query = intent.getStringExtra(SearchManager.QUERY);
Log.w(TAG_LOG, query);
}
}
The SearchView is correctly created and can switch from the Icon mode to the TextView mode but when I push the Search Button on the keyboard the new SoundSearchActivity doesn't start. Anyone can help me?

Try this in your manifest:
Add a meta-data pointing to the SearchActivity in the tag of the Activity where search is started
Move the searchable tag to the SearchAvtivity
Add launchMode="singleTop" to the SearchActivity to make sure there's only one instance of it at top of the stack. New search intents will come in trough onNewIntent which you already implemented.
<meta-data android:name="android.app.searchable"
android:resource="#xml/searchable" />
</activity>
<activity
android:name="it.polimi.dima.sound4u.activity.MyGiftsActivity"
android:label="#string/title_activity_my_gifts" >
<meta-data android:name="android.app.default_searchable"
android:value="it.polimi.dima.sound4u.activity.SoundSearchActivity"/>
The initial guide by Google (found here) didn't give me a working SearchView either, but making theses changes did.