Develop Reference

Navigation drawer: How do I set the navigation item selected listener with custom tool bar?

I don't see any error when I open the navigation drawer, but it keeps getting closed whenever I select an item. Edit: My drawer gets closed automatically on item selection without showing the Toast message as mentioned in NavigationItemSelectedListener. The toast message is not displayed.
I have used a custom toolbar in which I have added an image view as a side menu button.
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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=".CustomToolbar"
android:id="#+id/drawer_layout">
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:headerLayout="#layout/header_file"
app:menu="#menu/main_manu"
android:layout_gravity="start"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bggradient">
<include
android:id="#+id/toolbar"
layout="#layout/layout_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</androidx.drawerlayout.widget.DrawerLayout>
public class CustomToolbar extends AppCompatActivity {
private Toolbar toolbar;
private DrawerLayout drawer;
private NavigationView navigationView;
private ActionBarDrawerToggle toggle;
private ImageView side_menu;
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
if (toggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_custom_toolbar);
toolbar = (Toolbar) findViewById(R.id.navigation_bar);
side_menu = findViewById(R.id.side_menu);
drawer = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.navigation_view);
setSupportActionBar(toolbar);
toggle = new ActionBarDrawerToggle(this, drawer, R.string.open, R.string.close);
drawer.addDrawerListener(toggle);
toggle.syncState();
side_menu.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
drawer.openDrawer(Gravity.LEFT);
}
});
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.home_menu: {
Toast.makeText(CustomToolbar.this, "Home Selected", Toast.LENGTH_SHORT).show();
}
case R.id.community_menu: {
Toast.makeText(CustomToolbar.this, "Community Selected", Toast.LENGTH_SHORT).show();
}
case R.id.posts_menu: {
Toast.makeText(CustomToolbar.this, "Posts Selected", Toast.LENGTH_SHORT).show();
}
case R.id.website_menu: {
Toast.makeText(CustomToolbar.this, "Website Selected", Toast.LENGTH_SHORT).show();
}
case R.id.share_menu: {
Toast.makeText(CustomToolbar.this, "Share Selected", Toast.LENGTH_SHORT).show();
}
case R.id.feedback_menu: {
Toast.makeText(CustomToolbar.this, "Feedback Selected", Toast.LENGTH_SHORT).show();
}
case R.id.about_menu: {
Toast.makeText(CustomToolbar.this, "About us Selected", Toast.LENGTH_SHORT).show();
}
case R.id.logout_menu: {
Toast.makeText(CustomToolbar.this, "Logout Selected", Toast.LENGTH_SHORT).show();
}
}
return false;
}
});
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)){
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
I have tried other method with default toolbar, and it was working properly but I am not able to figur out the problem with custom toolbar. I wanted to display a toast on item selection inside the navigation drawer. Please help me find the solution...
Thank you.

In onNavigationItemSelected, Change this
return false;
to
return true;

After so long finally I found the solution to my problem. But I don't know why it was happening like that but I'm happy that it is finally working. And I am also very happy to share it with those who may experience the same issue in the future which I hope they won't.
I referred to the link from the Git hub for this solution. Link: https://github.com/priyalbhatewara123/Navigation-Drawer--Android
Finally here is the solution I found,
I just added the following lines of codes below </ScrollView> which was above <ScrollView> in the problematic code used in my activity_custom_toolbar.xml.
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:headerLayout="#layout/header_file"
app:menu="#menu/main_manu"
android:layout_gravity="start"/>
I'm also adding the code after changes,
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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=".CustomToolbar"
android:id="#+id/drawer_layout">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bggradient">
<include
android:id="#+id/toolbar"
layout="#layout/layout_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
<com.google.android.material.navigation.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:headerLayout="#layout/header_file"
app:menu="#menu/main_manu"
android:layout_gravity="start"/>
</androidx.drawerlayout.widget.DrawerLayout>

Navigation Drawer click not triggering

enter image description hereAs you can see I have added 6 item in navigation drawer but on clicking Logout it is not triggered. And sorry for bad code format. I'm new here.
#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_log_out) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.nav_profile:
break;
case R.id.nav_wallet:
break;
case R.id.nav_search:
break;
case R.id.nav_about_us:
break;
case R.id.nav_contact_us:
break;
case R.id.nav_log_out:
Intent intent = new Intent(this,LogIn.class);
FirebaseAuth.getInstance().signOut();
startActivity(intent);
}
This is my XML file for menu item. The id are the same I declared in the XML file. Log out in action bar is working fine but it is not working in Navigation Drawer.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_profile"
android:icon="#drawable/ic_person_black_24dp"
android:title="Profile" />
<item
android:id="#+id/nav_wallet"
android:icon="#drawable/ic_attach_money_black_24dp"
android:title="EasyFare Wallet" />
<item
android:id="#+id/nav_search"
android:icon="#drawable/ic_directions_bus_black_24dp"
android:title="Search Bus" />
<item
android:id="#+id/nav_about_us"
android:icon="#drawable/ic_folder_shared_black_24dp"
android:title="About Us"/>
<item
android:id="#+id/nav_contact_us"
android:icon="#drawable/ic_email_black_24dp"
android:title="Contact Us" />
<item
android:id="#+id/nav_log_out"
android:icon="#drawable/ic_exit_to_app_black_24dp"
android:title="Log Out" />
</group>
</menu>
activity file with DrawerLayout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>

You have to add brackets for case in logout..
case R.id.nav_log_out:
{
Intent intent = new Intent(this,LogIn.class);
FirebaseAuth.getInstance().signOut();
startActivity(intent);
}

Could you include the code in your activity's onCreate?
One possibility is that you forgot to register your activity as the listener for the navigation view.
mNavigationView.setNavigationItemSelectedListener(this)

Clicking on some other item, let's say the second one, gets this item triggered?
If yes add a break statement in your logout case and also create a default case.
You could also try replacing your code with the following sample.
#SuppressWarnings("StatementWithEmptyBody")
#Override public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.nav_profile:
break;
case R.id.nav_wallet:
break;
case R.id.nav_search:
break;
case R.id.nav_about_us:
break;
case R.id.nav_contact_us:
break;
case R.id.nav_log_out:
{
Intent intent = new Intent(this,LogIn.class);
FirebaseAuth.getInstance().signOut();
startActivity(intent);
break;
}
DrawerLayout drawer;
drawer = findViewById(R.id.THE_ID_OF_YOUR_DRAWER);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Also make sure that in your OnCreate , OnStart or onResume you include the following
DrawerLayout drawer;
drawer = findViewById(R.id.THE_ID_OF_YOUR_DRAWER);

I will provide you with a code i use for a project of mine and try to see if you find any differences that would explain the fact your code does not work.
AnnouncementsActivity.java
.
.
.
.
public class AnnouncementsActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_announcements);
.
.
.
.
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer;
drawer = findViewById(R.id.drawer_layout_astiko);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
toolbar.setNavigationIcon(R.mipmap.ic_toolbar);
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
.
.
.
.
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if (id == R.id.nav_first_item) {
if(prev_activity_routes){
Intent intent = new Intent(this,RoutesActivity.class);
intent.putExtra("Direction Forth",bus_direction_forth);
intent.putExtra("Team",team);
intent.putExtra("Route name", value1);
intent.putExtra("odigos_onomateponimo",odigos_onomateponimo);
startActivity(intent);
}else{
if(isAstiko){
Intent intent = new Intent(this,TicketIssuanceActivityAstiko.class);
intent.putExtra("Direction Forth",bus_direction_forth);
intent.putExtra("Team",team);
intent.putExtra("Route name", value1);
intent.putExtra("odigos_onomateponimo",odigos_onomateponimo);
startActivity(intent);
}else{
Intent intent = new Intent(this,TicketIssuanceActivity.class);
intent.putExtra("Direction Forth",bus_direction_forth);
intent.putExtra("Team",team);
intent.putExtra("Route name", value1);
intent.putExtra("odigos_onomateponimo",odigos_onomateponimo);
startActivity(intent);
}
}
} else if (id == R.id.nav_second_item) {
Intent intent = new Intent(this,DefinedTicketsActivity.class);
intent.putExtra("Direction Forth",bus_direction_forth);
intent.putExtra("Team",team);
intent.putExtra("Route name", value1);
intent.putExtra("odigos_onomateponimo",odigos_onomateponimo);
intent.putExtra("PreviousActivityRoutes",prev_activity_routes);
intent.putExtra("isAstiko",isAstiko);
startActivity(intent);
}
.
.
.
.
}else if (id == R.id.nav_eighth_item) {
Intent intent = new Intent(this, SignInActivity.class);
startActivity(intent);
}
DrawerLayout drawer;
drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
}
ActivityAnnouncements.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_announcements"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="500dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:theme="#style/NavigationDrawerStyle"
app:headerLayout="#layout/my_nav_header"
app:menu="#menu/my_drawer" />
</android.support.v4.widget.DrawerLayout>
app_bar_announcements.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"
tools:context="com.e_analysis.AlphaPro.MobileTicketing.AnnouncementsActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/MyTheme">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="65dp"
android:background="?attr/colorPrimary"
app:popupTheme="#style/MyTheme"/>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_announcements" />
</android.support.design.widget.CoordinatorLayout>
content_announcements.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:layout_marginBottom="-0dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:orientation="vertical"
android:background="#color/colorPrimary"
android:gravity="fill"
tools:context="com.e_analysis.AlphaPro.MobileTicketing.AnnouncementsActivity"
tools:showIn="#layout/app_bar_announcements">
.
.
.
.
</LinearLayout>
my_drawer.xml in the menu subfolder
<?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">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_first_item"
android:icon="#mipmap/ic_printer_black"
android:title="#string/nav_first_item_value"/>
<item
android:id="#+id/nav_second_item"
android:icon="#mipmap/ic_tune_vertical"
android:title="#string/nav_second_item_value" />
.
.
.
.
<item
android:id="#+id/nav_eighth_item"
android:icon="#mipmap/ic_logout"
android:title="#string/nav_eighth_item_value" />
</group>
</menu>
my_nav_header.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"
android:layout_width="match_parent"
android:layout_height="#dimen/nav_header_height"
android:background="#drawable/side_nav_bar"
android:gravity="bottom"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_vertical_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:theme="#style/ThemeOverlay.AppCompat.Dark">
.
.
.
.
</LinearLayout>
This code is working (not as it is ofcourse) so try to do some cross-checking with it and see what you are missing. Most probably it will be something easy to overlook and frustrating when you find out. Good luck!

BottomNavigationView not showing in my activity

I am implementing BottomNavigationView using this link
i implemented everything step by step but my navigationview not showup at bottom of the screen.
this is what i done.
public class MainActivity extends AppCompatActivity implements ActivityCompat.OnRequestPermissionsResultCallback {
Intent intent = null;
BottomNavigationView navigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigationView = (BottomNavigationView) findViewById(R.id.navigation);
navigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if(id == R.id.program){
intent = new Intent(MainActivity.this, MainActivity.class);
startActivity(intent);
finish();
}
if(id == R.id.access){
try {
manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(myIntent);
overridePendingTransition(R.anim.push_up_in,
R.anim.push_up_out);
} else {
intent = new Intent(MainActivity.this, Access.class);
startActivity(intent);
finish();
}
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
if(id == R.id.informations){
intent = new Intent(MainActivity.this, Information.class);
startActivity(intent);
finish();
return true;
}
if(id == R.id.contact){
intent = new Intent(MainActivity.this, Contact.class);
startActivity(intent);
finish();
return true;
}
return false;
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu = navigationView.getMenu(); <---- // -->
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
and my activity.xml
<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:background="#color/colorWhite">
<android.support.design.widget.BottomNavigationView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:design="http://schema.android.com/apk/res/android.support.design"
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_gravity="bottom"
design:menu="#menu/menu_main" />
</android.support.design.widget.CoordinatorLayout>
and i also updated gradle version to 25, otherwise it will not work.
compileSdkVersion 25
buildToolsVersion "24.0.3"
targetSdkVersion 25
compile 'com.android.support:appcompat-v7:25.0.0'
compile 'com.android.support:design:25.0.0'

The reason it doesn't work is because menu is in the wrong namespace (design). Use the app namespace instead.
<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:background="#color/colorWhite">
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_gravity="bottom"
app:menu="#menu/menu_main" />
</android.support.design.widget.CoordinatorLayout>

Try below xml. Don't forget to add app:layout_anchor and app:layout_anchorGravity="bottom". Here the BottomNavigationView is anchored to the FrameLayout with gravity bottom.
<?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/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<FrameLayout
android:id="#+id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Contents -->
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/nm_bottom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimaryDark"
android:foregroundTint="#color/colorAccent"
app:itemIconTint="#android:color/white"
app:itemTextColor="#android:color/white"
app:layout_anchor="#+id/rv"
app:layout_anchorGravity="bottom"
app:menu="#menu/nav_menu" />
</android.support.design.widget.CoordinatorLayout>

I had this problem because my BottomNavigationView was not showing in the design on the android studio. But when I ran the code it appeared on my phone.
So If you did not try running it. Run it and check before you search for answers maybe that is your problem

Find Styles.xml in Values.(res/Values/Styles.xml) Change this
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
to this:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

Cannot load Fragments from Navigation Drawer items

I have found a lot about this around but I really can't solve my problem. I have spent hours in this but nothing.
I have a Navigation Drawer Activity made with Android Studio 2.1.1 templates. Of course I want to change the view of my app, when I click on a item in the menu, showing different Fragments. This is the code that I have in the MainActivity:
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
new gaussFragment();
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
When I click on the first item of the navigation drawer (the one with the id R.id.nav_camera) I can see the toast but the new Fragment is not appearing. I am using this code in gaussFragment():
public class gaussFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_gauss, container, false);
}
}
Of course as you can see here the fragment_gauss.xml is its relative layout having this code:
<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="info.androidhive.tabsswipexx.gaussFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment" />
</FrameLayout>
How could I solve this?
The content_main is the first thing that I see when the app launches. Should I try to add something like
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
and somehow load there my fragments?

If you're using the Navigation Drawer template provided by Android Studio then in the navigation Drawer main activity xml you'll find something like :
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<!-- The main content view -->
<include layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- the navigation drawer the comes from the left-->
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
If you take a closer look there you'll see that it consistst of two main parts that I have commented for you. One is for the navigation drawer stuff and the other is the main content wiew stuff. If you ctrl+click on layout="#layout/app_bar_main" you'll see that another xml opens which is the following:
<?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="copsonic.com.SoundExchange.demoApp.MainActivity">
<!--Main View tool bar-->
<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>
<!--The content that will be displayed in the main view when the navigation drawer is not opened-->
<include layout="#layout/content_main" />
<!--Floating Action Button Stuff-->
<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:scaleType="center"
android:src="#mipmap/ic_rx_tx"
android:saveEnabled="false"
app:backgroundTint="#000000"
android:adjustViewBounds="false" />
</android.support.design.widget.CoordinatorLayout>
There you'll see 3 main parts, one for the tool bar, one for the Floating Action Button control and finally one for the content that will be displayed in the main view when the navigation drawer is not opened, this is the one you care about. If you ctrl+click in <include layout="#layout/content_main" /> You'll see a third xml were you must add a Fragmet container. In the end it's something like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/app_bar_main"
tools:context="copsonic.com.SoundExchange.demoApp.MainActivity">
<!-- A fragmet container to dynamically swap between fragmets-->
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
So after all this from your main activity code you just have to do two things, first manage which fragment is going to be seen first, you do this in the OnCreate method by adding :
FragmentTransmitter initialFragment = new FragmentTransmitter();
// Check that the activity is using the layout version with
// the fragment_container FrameLayout
if (findViewById(R.id.fragment_container) != null) {
// this check allows you not to load the default fragment unless
//it's the first time you launch the activity after having destroyed it
if (savedInstanceState != null) {
return;
}
// Create the fragment that is seen the first time your app opens
//pass useful info to the fragment from main activity if needed
//(it is recommended not to do this in the constructor, so you have to do it through a Bundle)
Bundle args = new Bundle();
args.putSerializable("ModulationType",aModulation);
initialFragment.setArguments(args);
// In case this activity was started with special instructions from an
// Intent, pass the Intent's extras to the fragment as arguments
//initialFragment.setArguments(getIntent().getExtras());
// Add the fragment to the 'fragment_container' FrameLayout
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, initialFragment).commit();
}
And then the second thing is handle properly which fragment will be displayed each time an option is selected in the navigation drawer
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
FragmentTransmitter Gauss= new new gaussFragment();
//pass useful info to fragment if needed
Bundle args = new Bundle();
args.putSerializable(getString(R.string.ModulationType),aModulation);
Gauss.setArguments(args);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, Gauss,"TAG_GaussFragment"); //pacing a tag is not mandatory but it is pretty useful if you want to know later which fragment is being displayed in the fragment container
//transaction.addToBackStack(null);
transaction.commit();
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}

Navigation View is not calling onNavigationItemSelected method

I'm using a NavigationView in a DrawerLayout, I'm not sure if I've forgotten something, but just is hidding the Navigation when I click it.
this is my code:
MainActivity.java:
private void instantiateDrawerLayout() {
Toolbar mToolbar = (Toolbar) generalContent.findViewById(R.id.toolbar);
mToolbar.setBackgroundColor(getResources().getColor(R.color.colorMainActivity));
setSupportActionBar(mToolbar);
NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view);
navigationView.setItemIconTintList(ColorStateList.valueOf(getResources().getColor(R.color.colorMainActivity)));
navigationView.setNavigationItemSelectedListener(this);
Log.d("instantiateDrawerLayout", "called");
ActionBarDrawerToggle drawerToggle = new ActionBarDrawerToggle(this, mDrawer, mToolbar, R.string.drawer_open, R.string.drawer_close);
mDrawer.setDrawerListener(drawerToggle);
drawerToggle.syncState();
...
}
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
Log.d("onNavigationItem", "called");
final int itemId = menuItem.getItemId();
Intent intent;
switch (itemId) {
case R.id.navigation_item_1:
hideDrawer();
break;
case R.id.navigation_item_2:
intent = new Intent(this, FirstActivity.class);
startActivity(intent);
this.finish();
break;
case R.id.navigation_item_3:
intent = new Intent(this, SecondActivity.class);
startActivity(intent);
this.finish();
break;
case R.id.navigation_item_4:
intent = new Intent(this, ThirdActivity.class);
startActivity(intent);
this.finish();
break;
}
return false;
}
activity_general.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorBackground">
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/drawer_header"
app:itemIconTint="#color/colorAccent"
app:menu="#menu/menu_drawer" />
<LinearLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:orientation="vertical" />
menu_drawer.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<!--All the items added without any grouping-->
<item
android:id="#+id/navigation_item_1"
android:icon="#drawable/ic_number_1"
android:title="#string/navigation_item_1" />
<item
android:id="#+id/navigation_item_2"
android:icon="#drawable/ic_number_2"
android:title="#string/navigation_item_2" />
<item
android:id="#+id/navigation_item_3"
android:icon="#drawable/ic_number_3"
android:title="#string/navigation_item_3" />
<item
android:id="#+id/navigation_item_4"
android:icon="#drawable/ic_number_4"
android:title="#string/navigation_item_4" />
</menu>
and my Logcat:
enter image description here

I solved it, was for the orden in the Layout.
As you see I put the NavigationView first, and It causes when I clicked over the NavigationView thinks I clicked In LinearLayout, or I think this this is what is happened.
Just change the order and all fine.