Develop Reference

How to set menu to an AppBarLayout

I'm new to programming, and I want to add a settings menu button.
Like on the picture, my app doesn't show the three dots button.
MainActivity.java :
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
ViewPager viewPager = findViewById(R.id.view_pager);
viewPager.setAdapter(sectionsPagerAdapter);
TabLayout tabs = findViewById(R.id.tabs);
tabs.setupWithViewPager(viewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.settings, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.vueSatellite:
Toast.makeText(this, "Hi", Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
activity_main.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=".MainActivity">
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme">
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:minHeight="?actionBarSize"
android:padding="#dimen/appbar_padding"
android:text="#string/app_name"
android:textColor="#color/colorAccent"
android:textAppearance="#style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/White"
app:tabTextColor="#color/colorAccent"/>
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
settings.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/vueSatellite"
android:title="#string/item_vue_satellite"
app:showAsAction="never"/>
</menu>
What is my mistake ?
Or what do I have to add?
Tell me if there is missing information like the file AndroidManifest.xml for example.
Thanks

In your Activity just add
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Hope it works.

Actionbar icons not beeing updated

I am trying to change an icon in the actionbar, but I can not get it work. If I send to the log the getIcon().toString(), It seems that the icon is modified, but the actionbar is not updated.
This is the main activity layout:
<?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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:layout_editor_absoluteY="81dp">
<android.support.v7.widget.Toolbar
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
android:theme="#style/AppTheme.AppBarOverlay"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:popupTheme="#style/AppTheme">
</android.support.v7.widget.Toolbar>
The menu 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" />
<item
android:id="#+id/about"
android:title="#string/about"
android:orderInCategory="110"
app:showAsAction="never" />
<item
android:id="#+id/connect"
android:title="Connect"
android:icon="#drawable/ic_play"
android:orderInCategory="130"
app:showAsAction="always" />
<item
android:id="#+id/testin"
android:title="Test_in"
android:icon="#drawable/ic_testin"
android:orderInCategory="120"
app:showAsAction="always" />
And the main activity code:
//Menu Items
MenuItem testinMenu, connectMenu;
Menu actionMenu;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Action Bar
toolbar = findViewById( R.id.appbar);
setSupportActionBar( toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menumain, menu);
actionMenu = menu;
connectMenu = (MenuItem) menu.findItem(R.id.connect);
testinMenu = (MenuItem) menu.findItem(R.id.testin);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.connect: {
connectMenu.setIcon( R.drawable.ic_stop);
invalidateOptionsMenu();
if( isRainbowConnected == false) {
connect();
} else
disconnect();
break;
}
case R.id.testin: {
if( isRainbowConnected == true)
sendTestIn();
break;
}
// case blocks for other MenuItems (if any)
}
return true;
}
I have tried everything, but nothing seems to work.
Thanks in advance!

Android Search menu item disappears when pressing back button/collapsing search field

I'm using android SearchView to have a search button in my action bar. I followed this tutorial from Google Developers on YouTube, and added a few tweaks based on my own needs. However, whenever I exit the search field that comes up when clicking the button, the search button disappears!
Here is my onCreateOptionsMenu and onOptionsItemSelected functions
onCreateOptionsMenu:
#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;
}
onOptionsItemSelected:
#Override
public boolean onOptionsItemSelected(final 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();
switch (id) {
case R.id.action_settings:
// TODO: settings activity
break;
case R.id.action_logout:
FirebaseAuth.getInstance().signOut();
break;
case R.id.action_search:
// Initialize everything here, because it produces a NullPointerException if initialized in onCreateOptionsMenu
SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
SearchManager searchManager = (SearchManager)getSystemService(Context.SEARCH_SERVICE);
ComponentName componentName = new ComponentName(this, SearchableActivity.class);
searchView.setSearchableInfo(searchManager.getSearchableInfo(componentName));
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
return false;
}
});
break;
}
return super.onOptionsItemSelected(item);
}
And here's my menu_main.xml layout 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="com.magnus.inline.MainActivity">
<item
android:id="#+id/action_search"
android:icon="#drawable/ic_action_search"
android:title="Search"
app:actionViewClass="android.support.v7.widget.SearchView"
app:showAsAction="ifRoom|collapseActionView"/>
<item
android:id="#+id/action_settings"
android:orderInCategory="100"
android:title="#string/action_settings"
app:showAsAction="never" />
<item
android:id="#+id/action_logout"
android:orderInCategory="200"
android:title="#string/action_logout"
app:showAsAction="never" />
And searchable.xml layout file
<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="#string/app_name"
android:hint="Search"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</searchable>
Images
EDIT:
I noticed that the only time the search button disappears is when I've pressed the options button while in "search mode"(see the last image in link). I have a feeling that when the options menu is displayed, the "action_search" is somehow converted to a options menu item, instead of an action bar item (?). For anyone asking, whenever I try to call MenuItemCompat.getActionView() of a searchview MenuItem in the onCreateOptionsMenu function, my app just crashes and says that it tries to perform it on a null object reference.
Here's my activity_main.xml layout file
<?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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.magnus.inline.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/main_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/main_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AlertDialog.AppCompat.Light"
android:background="#color/colorPrimaryDark" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

Instead of
app:showAsAction="ifRoom|collapseActionView"
Change to
app:showAsAction="always|collapseActionView

How to conserve menu when creating an Intent

I am very new to Java / Android programing. Android Studio offered me a layout that consists in a menu like such:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_empty"
android:icon="#drawable/ic_menu_send"
android:title="Empty" />
<item
android:id="#+id/nav_quotes"
android:icon="#drawable/ic_menu_send"
android:title="Quotes" />
<item
android:id="#+id/nav_info"
android:icon="#drawable/ic_menu_send"
android:title="Information" />
</group>
</menu>
For now I'm trying to make the second item of the menu work, here's where I am when I press it:
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_empty) {
} else if (id == R.id.nav_quotes) {
Intent intent = new Intent(this, QuotesActivity.class);
startActivity(intent); // start the newly created Intent
} else if (id == R.id.nav_info) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
As you can see I create an Intent that leads me to QuotesActivity, but once I enter this page, the menu that was on the top left (classic clickable android menu) disappears.
Here's the activity_quotes.xml file for the QuotesActivity:
<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.kade_c.plus.QuotesActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="#string/quote_welcome"
android:id="#+id/textView_quotes"
android:layout_marginTop="236dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/quotes_button"
android:id="#+id/button_quotes"
android:onClick="onClick"
android:layout_marginBottom="184dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
What can I do to give the user the possibility to access the menu at any given time? Additionally, if you see flaws in how I proceed, please let me know !
Thank you.

Android: Share Menu, My menu inflater cannot Resolve my resource

I am trying to add a share menu to my app that sends text from textview 2 to another app I.E KiK but currently i cannot get it to identify the Resource file as the menu heres my code:
public class ME extends Activity {
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(android.R.menu.main, menu);
MenuItem shareItem = menu.findItem(R.id.action_share);
ShareActionProvider mShare = (ShareActionProvider)shareItem.getActionProvider();
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_TEXT, "Hi");
mShare.setShareIntent(shareIntent);
return super.onCreateOptionsMenu(menu);
}
}
The getMenuInflater().inflate(android.R.menu.main, menu); is the problem
And my XML Resource file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:="#+id/TextView 1"
android:orientation="vertical"
android:layout_width="400dp"
android:layout_height="300dp" >
</TextView>
<TextView
android:="#+id/TextView 2"
android:orientation="vertical"
android:layout_width="400dp"
android:layout_height="300dp" >
</TextView>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android="http://schemas.android.com/apk/res-auto" >
<item android:id="#+id/action_share"
android:orderInCategory="100"
android:icon="#drawable/ic_menu_share"
android:actionProviderClass= "android.widget.ShareActionProvider" />
</menu>
</LinearLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android="http://schemas.android.com/apk/res-auto" >
<item android:id="#+id/action_share"
android:orderInCategory="100"
android:icon="#drawable/ic_menu_share"
android:actionProviderClass= "android.widget.ShareActionProvider"
/>
</menu>
Should be put in a seperate xml file in the menu folder (say main.xml).
And,
getMenuInflater().inflate(android.R.menu.main, menu);
should be corrected as
getMenuInflater().inflate(R.menu.main, menu);