You might have noticed that lot of android applications introduced a
sliding panel menu to navigate between major modules of the application.
Previously this kind of UI was done using some third party libraries
where a list view and some swiping gestures used to achieve this. But
now android itself officially introduced sliding panel menu by
introducing a newer concept called Navigation Drawer in which we combine DrawerLayout and NavigationView to achieve the desired output.
Most of the time Sliding Menu (Navigation Drawer) will be hidden and can be shown by swiping the screen from left edge to right or tapping the app icon on the action bar.
This creates the below basic skeleton app with few navigation menu items.
Even though Android Studio gives you basic Navigation Drawer Menu,
making it fully functional takes some effort. The next steps explains
how to customize the navigation drawer appearance by adding header image, profile image
and other texts. You will also learn how to prepare and attach the
other menu views by creating the fragments and loading them properly.
To give you full information about navigation drawer, instead of choosing the drawer temple, I am creating an empty project and add the navigation drawer by explaining every step is needed. So let’s get started.
Below is the final output we are going to achieve in this article.
2. Open build.gradle located in app level and add below dependencies. I am adding Glide image library dependency. This is not needed for navigation drawer, but to load the profile image from url.
3. Open strings.xml, dimens.xml, colors.xml located under res ⇒ values and add the below values.
4. Download Home, Photos, Movies, Notifications, Settings icons from Material Icons and add them to your project’s res folder. These icons will be used as navigation menu item icons.
5. Under res ⇒ menu directory, create two menu xml files named notifications.xml and main.xml. These menus are used to render different toolbar overflow menus when the user switches between navigation drawer items.
7. Create all the fragment classes needed for navigation menu. Overall I am creating five fragment classes. Right click on fragment package, New ⇒ Fragment ⇒ Fragment (Blank) and name it as HomeFragment.java. This fragment will be loaded always whenever user open the app.
Likewise create other fragment activities named PhotosFragment, MoviesFragment, NotificationsFragment and SettingsFragment.
8. In our navigation drawer menu, there are two other menu items, About Us and Privacy Policy. For these two we are gonna create activities instead of fragments. Create new two activities named AboutUsActivity.java and PrivacyPolicyActivity.java.
9. Inside other package, create a class named CircleTransform.java This class is used to display the profile image in circular fashion.
10. Under res ⇒ drawable, create a file named bg_circle.xml. This provides circular background to view.
11. Under res layout folder, create a layout named menu_dot.xml. This layout is used to render dot next to notifications label.
13. Under res ⇒ layout, create a file named nav_header_main.xml This layout renders the navigation drawer header part with a profile image, name and website.
14. Now we’ll create another layout file to add required Toolbar, FAB and FrameLayout. FrameLayout is used to load appropriate fragment when an item is selected from nav menu. Create a layout file named app_bar_main.xml under res ⇒ layout.
15. Open the layout file your main activity activity_main.xml and add NavigationView element. You can notice that the toolbar layout is added using <include> tag.
16. Now we have all the required elements in place.
It’s time to open the main activity and do the necessary changes to make
the navigation drawer functional. Open MainActivity.java and modify as explained below.
setUpNavigationView() – Initializes the Navigation Drawer by creating necessary click listeners and other functions.
loadNavHeader() – Function loads the navigation drawer header information like profile image, name and website. Here we use Glide image library to load the profile image.
getHomeFragment() – Returns the appropriate Fragment depending on the nav menu item user selected. For example if user selects Photos from nav menu, it returns PhotosFragment. This can be done by using the variable navItemIndex.
loadHomeFragment() – Loads the fragment returned from getHomeFragment() function into FrameLayout. It also takes care of other things like changing the toolbar title, hiding / showing fab, invalidating the options menu so that new menu can be loaded for different fragment.
Other code is very easy to understand and self explanatory. I have also added comments to each code block for better understanding.
Run and test the app once. You should able to see the app as shown below. Also check the Video demo of fully implemented navigation drawer.
Most of the time Sliding Menu (Navigation Drawer) will be hidden and can be shown by swiping the screen from left edge to right or tapping the app icon on the action bar.
Example Applications
You can see lot of popular applications like Facebook, Youtube, Google + already introduced navigation drawer menu in their applications. Following are the navigation drawer menus of multiple apps.
1. Android Studio Navigation Drawer Template
You can add Navigation Drawer in your app in two ways. The quick and easy way is choosing the Navigation Drawer Activity from Android Studio when the new project is created. This creates an empty project with navigation drawer added.
To give you full information about navigation drawer, instead of choosing the drawer temple, I am creating an empty project and add the navigation drawer by explaining every step is needed. So let’s get started.
Below is the final output we are going to achieve in this article.
2. Starting new Project
1. Create a new project in Android Studio from File ⇒ New Project by filling the required details. When it prompts you to select the activity, choose Empty Activity and continue.2. Open build.gradle located in app level and add below dependencies. I am adding Glide image library dependency. This is not needed for navigation drawer, but to load the profile image from url.
dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:24.0.0-beta1' compile 'com.android.support:design:24.0.0-beta1' compile 'com.android.support:support-v4:24.0.0-beta1' // Glide image library compile 'com.github.bumptech.glide:glide:3.7.0'} |
<resources> <string name="app_name">Navigation Drawer</string> <string name="navigation_drawer_open">Open navigation drawer</string> <string name="navigation_drawer_close">Close navigation drawer</string> <string name="openDrawer">open_drawer</string> <string name="closeDrawer">close_drawer</string> <!-- Navigation Drawer menu labels --> <string name="nav_home">Home</string> <string name="nav_photos">Photos</string> <string name="nav_movies">Movies</string> <string name="nav_notifications">Notifications</string> <string name="nav_settings">Settings</string> <string name="nav_about_us">About Us</string> <!-- Toolbar titles when navigation menu item is selected --> <string-array name="nav_item_activity_titles"> <item>Home</item> <item>Photos</item> <item>Movies</item> <item>Notifications</item> <item>Settings</item> </string-array> <string name="activity_title_about_us">About Us</string> <string name="activity_title_privacy_policy">Privacy Policy</string> <string name="action_clear_all">Clear All</string> <string name="action_logout">Logout</string> <string name="action_mark_all_read">Mark All as Read</string> <string name="privacy_policy">Privacy Policy</string></resources> |
<resources> <!-- Default screen margins, per the Android Design guidelines. --> <dimen name="nav_header_vertical_spacing">16dp</dimen> <dimen name="nav_header_height">160dp</dimen> <!-- Default screen margins, per the Android Design guidelines. --> <dimen name="activity_horizontal_margin">16dp</dimen> <dimen name="activity_vertical_margin">16dp</dimen> <dimen name="fab_margin">16dp</dimen> <dimen name="profile_width">75dp</dimen> <dimen name="profile_height">75dp</dimen></resources> |
<?xml version="1.0" encoding="utf-8"?><resources> <color name="colorPrimary">#d32f2f</color> <color name="colorPrimaryDark">#c72c2c</color> <color name="colorAccent">#FFFFFF</color></resources> |
5. Under res ⇒ menu directory, create two menu xml files named notifications.xml and main.xml. These menus are used to render different toolbar overflow menus when the user switches between navigation drawer items.
<?xml version="1.0" encoding="utf-8"?> <item android:id="@+id/action_mark_all_read" android:orderInCategory="100" android:title="@string/action_mark_all_read" app:showAsAction="never" /> <item android:id="@+id/action_clear_notifications" android:orderInCategory="101" android:title="@string/action_clear_all" app:showAsAction="never" /></menu> |
<?xml version="1.0" encoding="utf-8"?> <item android:id="@+id/action_logout" android:orderInCategory="100" android:title="@string/action_logout" app:showAsAction="never" /></menu> |
Creating Fragments & Activities
6. Create three packages named activity, fragment, other and move the MainActivity.java to activity package.7. Create all the fragment classes needed for navigation menu. Overall I am creating five fragment classes. Right click on fragment package, New ⇒ Fragment ⇒ Fragment (Blank) and name it as HomeFragment.java. This fragment will be loaded always whenever user open the app.
Likewise create other fragment activities named PhotosFragment, MoviesFragment, NotificationsFragment and SettingsFragment.
8. In our navigation drawer menu, there are two other menu items, About Us and Privacy Policy. For these two we are gonna create activities instead of fragments. Create new two activities named AboutUsActivity.java and PrivacyPolicyActivity.java.
package info.androidhive.navigationdrawer.other;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Paint;import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;/** * Created by Lincoln on 10/03/16. */public class CircleTransform extends BitmapTransformation { public CircleTransform(Context context) { super(context); } @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) { return circleCrop(pool, toTransform); } private static Bitmap circleCrop(BitmapPool pool, Bitmap source) { if (source == null) return null; int size = Math.min(source.getWidth(), source.getHeight()); int x = (source.getWidth() - size) / 2; int y = (source.getHeight() - size) / 2; // TODO this could be acquired from the pool too Bitmap squared = Bitmap.createBitmap(source, x, y, size, size); Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888); if (result == null) { result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888); } Canvas canvas = new Canvas(result); Paint paint = new Paint(); paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP)); paint.setAntiAlias(true); float r = size / 2f; canvas.drawCircle(r, r, r, paint); return result; } @Override public String getId() { return getClass().getName(); }} |
<?xml version="1.0" encoding="utf-8"?><shape android:shape="oval"> <solid android:color="@color/colorPrimary"/> <size android:width="120dp" android:height="120dp"/></shape> |
<?xml version="1.0" encoding="utf-8"?> android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="vertical"> <LinearLayout android:layout_width="6dp" android:layout_height="6dp" android:background="@drawable/bg_circle"></LinearLayout></LinearLayout> |
Adding Navigation Drawer
12. Under res ⇒ menu directory, create a menu xml file named activity_main_drawer.xml. This menu renders the Navigation Drawer list items. Here we set the icons and labels. You can also notice here <group> is used to combine multiple items under single levels. An <item> also can be used group multiple child items with a title. This provides a horizontal separator between the two sets.<?xml version="1.0" encoding="utf-8"?> <group android:checkableBehavior="single"> <item android:id="@+id/nav_home" android:icon="@drawable/ic_home_black_24dp" android:title="@string/nav_home" /> <item android:id="@+id/nav_photos" android:icon="@drawable/ic_photo_library_black_24dp" android:title="@string/nav_photos" /> <item android:id="@+id/nav_movies" android:icon="@drawable/ic_local_movies_black_24dp" android:title="@string/nav_movies" /> <item android:id="@+id/nav_notifications" android:icon="@drawable/ic_notifications_black_24dp" android:title="@string/nav_notifications" /> <item android:id="@+id/nav_settings" android:icon="@drawable/ic_settings_black_24dp" android:title="@string/nav_settings" /> </group> <item android:title="Other"> <menu> <item android:id="@+id/nav_about_us" android:title="@string/nav_about_us" /> <item android:id="@+id/nav_privacy_policy" android:title="@string/privacy_policy" /> </menu> </item></menu> |
<?xml version="1.0" encoding="utf-8"?> android:id="@+id/view_container" android:layout_width="match_parent" android:layout_height="@dimen/nav_header_height" android:gravity="bottom" android:orientation="vertical" android:theme="@style/ThemeOverlay.AppCompat.Dark"> <ImageView android:id="@+id/img_header_bg" android:layout_width="match_parent" android:layout_height="match_parent" android:scaleType="fitXY" android:src="@mipmap/ic_launcher" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:orientation="vertical" android:padding="@dimen/activity_horizontal_margin"> <ImageView android:id="@+id/img_profile" android:layout_width="@dimen/profile_width" android:layout_height="@dimen/profile_height" android:paddingTop="@dimen/nav_header_vertical_spacing" app:srcCompat="@android:drawable/sym_def_app_icon" /> <TextView android:id="@+id/name" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingTop="@dimen/nav_header_vertical_spacing" android:textAppearance="@style/TextAppearance.AppCompat.Body1" /> <TextView android:id="@+id/website" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout></RelativeLayout> |
<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context="info.androidhive.navigationdrawer.activity.MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /> </android.support.design.widget.AppBarLayout> <FrameLayout android:id="@+id/frame" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior"></FrameLayout> <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" app:backgroundTint="@color/colorPrimary" app:srcCompat="@android:drawable/ic_dialog_email" /></android.support.design.widget.CoordinatorLayout> |
<?xml version="1.0" encoding="utf-8"?> 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> |
setUpNavigationView() – Initializes the Navigation Drawer by creating necessary click listeners and other functions.
loadNavHeader() – Function loads the navigation drawer header information like profile image, name and website. Here we use Glide image library to load the profile image.
getHomeFragment() – Returns the appropriate Fragment depending on the nav menu item user selected. For example if user selects Photos from nav menu, it returns PhotosFragment. This can be done by using the variable navItemIndex.
loadHomeFragment() – Loads the fragment returned from getHomeFragment() function into FrameLayout. It also takes care of other things like changing the toolbar title, hiding / showing fab, invalidating the options menu so that new menu can be loaded for different fragment.
Other code is very easy to understand and self explanatory. I have also added comments to each code block for better understanding.
package info.androidhive.navigationdrawer.activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.NavigationView;import android.support.design.widget.Snackbar;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentTransaction;import android.support.v4.view.GravityCompat;import android.support.v4.widget.DrawerLayout;import android.support.v7.app.ActionBarDrawerToggle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import com.bumptech.glide.Glide;import com.bumptech.glide.load.engine.DiskCacheStrategy;import info.androidhive.navigationdrawer.R;import info.androidhive.navigationdrawer.fragment.HomeFragment;import info.androidhive.navigationdrawer.fragment.MoviesFragment;import info.androidhive.navigationdrawer.fragment.NotificationsFragment;import info.androidhive.navigationdrawer.fragment.PhotosFragment;import info.androidhive.navigationdrawer.fragment.SettingsFragment;import info.androidhive.navigationdrawer.other.CircleTransform;public class MainActivity extends AppCompatActivity { private NavigationView navigationView; private DrawerLayout drawer; private View navHeader; private ImageView imgNavHeaderBg, imgProfile; private TextView txtName, txtWebsite; private Toolbar toolbar; private FloatingActionButton fab; // urls to load navigation header background image // and profile image private static final String urlNavHeaderBg = "http://api.androidhive.info/images/nav-menu-header-bg.jpg"; private static final String urlProfileImg = "https://lh3.googleusercontent.com/eCtE_G34M9ygdkmOpYvCag1vBARCmZwnVS6rS5t4JLzJ6QgQSBquM0nuTsCpLhYbKljoyS-txg"; // index to identify current nav menu item public static int navItemIndex = 0; // tags used to attach the fragments private static final String TAG_HOME = "home"; private static final String TAG_PHOTOS = "photos"; private static final String TAG_MOVIES = "movies"; private static final String TAG_NOTIFICATIONS = "notifications"; private static final String TAG_SETTINGS = "settings"; public static String CURRENT_TAG = TAG_HOME; // toolbar titles respected to selected nav menu item private String[] activityTitles; // flag to load home fragment when user presses back key private boolean shouldLoadHomeFragOnBackPress = true; private Handler mHandler; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); mHandler = new Handler(); drawer = (DrawerLayout) findViewById(R.id.drawer_layout); navigationView = (NavigationView) findViewById(R.id.nav_view); fab = (FloatingActionButton) findViewById(R.id.fab); // Navigation view header navHeader = navigationView.getHeaderView(0); txtName = (TextView) navHeader.findViewById(R.id.name); txtWebsite = (TextView) navHeader.findViewById(R.id.website); imgNavHeaderBg = (ImageView) navHeader.findViewById(R.id.img_header_bg); imgProfile = (ImageView) navHeader.findViewById(R.id.img_profile); // load toolbar titles from string resources activityTitles = getResources().getStringArray(R.array.nav_item_activity_titles); 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(); } }); // load nav menu header data loadNavHeader(); // initializing navigation menu setUpNavigationView(); if (savedInstanceState == null) { navItemIndex = 0; CURRENT_TAG = TAG_HOME; loadHomeFragment(); } } /*** * Load navigation menu header information * like background image, profile image * name, website, notifications action view (dot) */ private void loadNavHeader() { // name, website txtName.setText("Ravi Tamada"); txtWebsite.setText("www.androidhive.info"); // loading header background image Glide.with(this).load(urlNavHeaderBg) .crossFade() .diskCacheStrategy(DiskCacheStrategy.ALL) .into(imgNavHeaderBg); // Loading profile image Glide.with(this).load(urlProfileImg) .crossFade() .thumbnail(0.5f) .bitmapTransform(new CircleTransform(this)) .diskCacheStrategy(DiskCacheStrategy.ALL) .into(imgProfile); // showing dot next to notifications label navigationView.getMenu().getItem(3).setActionView(R.layout.menu_dot); } /*** * Returns respected fragment that user * selected from navigation menu */ private void loadHomeFragment() { // selecting appropriate nav menu item selectNavMenu(); // set toolbar title setToolbarTitle(); // if user select the current navigation menu again, don't do anything // just close the navigation drawer if (getSupportFragmentManager().findFragmentByTag(CURRENT_TAG) != null) { drawer.closeDrawers(); // show or hide the fab button toggleFab(); return; } // Sometimes, when fragment has huge data, screen seems hanging // when switching between navigation menus // So using runnable, the fragment is loaded with cross fade effect // This effect can be seen in GMail app Runnable mPendingRunnable = new Runnable() { @Override public void run() { // update the main content by replacing fragments Fragment fragment = getHomeFragment(); FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); fragmentTransaction.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out); fragmentTransaction.replace(R.id.frame, fragment, CURRENT_TAG); fragmentTransaction.commitAllowingStateLoss(); } }; // If mPendingRunnable is not null, then add to the message queue if (mPendingRunnable != null) { mHandler.post(mPendingRunnable); } // show or hide the fab button toggleFab(); //Closing drawer on item click drawer.closeDrawers(); // refresh toolbar menu invalidateOptionsMenu(); } private Fragment getHomeFragment() { switch (navItemIndex) { case 0: // home HomeFragment homeFragment = new HomeFragment(); return homeFragment; case 1: // photos PhotosFragment photosFragment = new PhotosFragment(); return photosFragment; case 2: // movies fragment MoviesFragment moviesFragment = new MoviesFragment(); return moviesFragment; case 3: // notifications fragment NotificationsFragment notificationsFragment = new NotificationsFragment(); return notificationsFragment; case 4: // settings fragment SettingsFragment settingsFragment = new SettingsFragment(); return settingsFragment; default: return new HomeFragment(); } } private void setToolbarTitle() { getSupportActionBar().setTitle(activityTitles[navItemIndex]); } private void selectNavMenu() { navigationView.getMenu().getItem(navItemIndex).setChecked(true); } private void setUpNavigationView() { //Setting Navigation View Item Selected Listener to handle the item click of the navigation menu navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { // This method will trigger on item Click of navigation menu @Override public boolean onNavigationItemSelected(MenuItem menuItem) { //Check to see which item was being clicked and perform appropriate action switch (menuItem.getItemId()) { //Replacing the main content with ContentFragment Which is our Inbox View; case R.id.nav_home: navItemIndex = 0; CURRENT_TAG = TAG_HOME; break; case R.id.nav_photos: navItemIndex = 1; CURRENT_TAG = TAG_PHOTOS; break; case R.id.nav_movies: navItemIndex = 2; CURRENT_TAG = TAG_MOVIES; break; case R.id.nav_notifications: navItemIndex = 3; CURRENT_TAG = TAG_NOTIFICATIONS; break; case R.id.nav_settings: navItemIndex = 4; CURRENT_TAG = TAG_SETTINGS; break; case R.id.nav_about_us: // launch new intent instead of loading fragment startActivity(new Intent(MainActivity.this, AboutUsActivity.class)); drawer.closeDrawers(); return true; case R.id.nav_privacy_policy: // launch new intent instead of loading fragment startActivity(new Intent(MainActivity.this, PrivacyPolicyActivity.class)); drawer.closeDrawers(); return true; default: navItemIndex = 0; } //Checking if the item is in checked state or not, if not make it in checked state if (menuItem.isChecked()) { menuItem.setChecked(false); } else { menuItem.setChecked(true); } menuItem.setChecked(true); loadHomeFragment(); return true; } }); ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.openDrawer, R.string.closeDrawer) { @Override public void onDrawerClosed(View drawerView) { // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank super.onDrawerClosed(drawerView); } @Override public void onDrawerOpened(View drawerView) { // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank super.onDrawerOpened(drawerView); } }; //Setting the actionbarToggle to drawer layout drawer.setDrawerListener(actionBarDrawerToggle); //calling sync state is necessary or else your hamburger icon wont show up actionBarDrawerToggle.syncState(); } @Override public void onBackPressed() { if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawers(); return; } // This code loads home fragment when back key is pressed // when user is in other fragment than home if (shouldLoadHomeFragOnBackPress) { // checking if user is on other navigation menu // rather than home if (navItemIndex != 0) { navItemIndex = 0; CURRENT_TAG = TAG_HOME; loadHomeFragment(); return; } } super.onBackPressed(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. // show menu only when home fragment is selected if (navItemIndex == 0) { getMenuInflater().inflate(R.menu.main, menu); } // when fragment is notifications, load the menu created for notifications if (navItemIndex == 3) { getMenuInflater().inflate(R.menu.notifications, 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_logout) { Toast.makeText(getApplicationContext(), "Logout user!", Toast.LENGTH_LONG).show(); return true; } // user is in notifications fragment // and selected 'Mark all as Read' if (id == R.id.action_mark_all_read) { Toast.makeText(getApplicationContext(), "All notifications marked as read!", Toast.LENGTH_LONG).show(); } // user is in notifications fragment // and selected 'Clear All' if (id == R.id.action_clear_notifications) { Toast.makeText(getApplicationContext(), "Clear all notifications!", Toast.LENGTH_LONG).show(); } return super.onOptionsItemSelected(item); } // show or hide the fab private void toggleFab() { if (navItemIndex == 0) fab.show(); else fab.hide(); }} |
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