I have a Bottom Navigation View with 4 items.
I wish to set the items in the middle of each bottom navigation view button and I have found a method but it works only when the application starts.
After I select another item, every icon moves up and I don't know why they are not keeping their position.
public class MainActivity extends AppCompatActivity{
private Toolbar mToolbar;
private BottomNavigationView bottomNavigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.customToolbar);
setSupportActionBar(mToolbar);
setTitle("");
mToolbar.setNavigationIcon(R.mipmap.back_icon);
bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation);
BottomNavigationViewShiftDisable.disableShiftMode(bottomNavigationView);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Fragment fragment = null;
switch (item.getItemId()) {
case R.id.profile:
fragment = new FirstFragment();
break;
case R.id.friends:
fragment = new SecondFragment();
break;
case R.id.circle:
fragment = new ThirdFragment();
break;
case R.id.settings:
fragment = new ForthFragment();
break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, fragment);
transaction.commit();
setMenuIconsInMiddle(bottomNavigationView);
return true;
}
});
bottomNavigationView.setSelectedItemId(R.id.profile);
}
/**
* This method is used to set margins for all the icons in the menu that is used in the
* bottom navigation view.
* #param navigationView an instance of the Bottom navigation view that holds the menu with
* the icons.
*/
public void setMenuIconsInMiddle(BottomNavigationView navigationView){
BottomNavigationMenuView menuView = (BottomNavigationMenuView)navigationView.getChildAt(0);
for(int index = 0; index <menuView.getChildCount(); index++){
final View iconView = menuView.getChildAt(index).findViewById(android.support.design.R.id.icon);
final ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams)iconView.getLayoutParams();
layoutParams.setMargins(0,50,0,0);
navigationView.requestLayout();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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.example.hermes.profilescreen.MainActivity">
<include layout="#layout/custom_toolbar"/>
<include layout="#layout/bottom_navigation"/>
</RelativeLayout>
bottom_nav_main.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/profile"
android:enabled="true"
android:icon="#drawable/ic_people_outline_black_24dp"
app:showAsAction="ifRoom"
android:title=""
/>
<item
android:id="#+id/friends"
android:enabled="true"
android:icon="#drawable/ic_person_black_24dp"
app:showAsAction="ifRoom"
android:title=""
/>
<item
android:id="#+id/circle"
android:enabled="true"
android:icon="#drawable/ic_panorama_fish_eye_black_24dp"
app:showAsAction="ifRoom"
android:title=""
/>
<item
android:id="#+id/settings"
android:enabled="true"
android:icon="#drawable/setting_white"
app:showAsAction="ifRoom"
android:title=""
/>
</menu>
bottom_navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/frame_layout"
android:layout_above="#+id/bottom_navigation"
>
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#color/light_black"
app:itemBackground="#drawable/set_backgorund"
app:itemIconTint="#color/item_state"
app:menu="#menu/bottom_nav_main"
/>
</RelativeLayout>
call setMenuIconsInMiddle on a thread. try this:-
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
//your code here
...
...
...
//Looper.getMainLooper() runs on main thread
new Handler(Looper.getMainLooper()).post(new Runnable(){
#Override
public void run() {
setMenuIconsInMiddle(bottomNavigationView);
}
});
return true;
}
});
this is working for me...
I set swipe tab view on activity which is works fine but the problem is the Action bar of activity get disappeared while it was appeared before tab view. Please guide me how to again appear action bar at the top of tab view.
MainActivity:
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from activity_main.xml
setContentView(R.layout.activity_main);
Toolbar myToolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(myToolbar);
// Locate the viewpager in activity_main.xml
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
((ViewPager.LayoutParams) (findViewById(R.id.tab_strip)).getLayoutParams()).isDecor = true;
// Set the ViewPagerAdapter into ViewPager
viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
}
}
Tab1: simlar for tab2 and tab3
public class FragmentTab1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab1.xml
View view = inflater.inflate(R.layout.fragmenttab1, container, false);
return view;
}
}
ViewPageAdapter:
public class ViewPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 3;
// Tab Titles
private String tabtitles[] = new String[] { "Tab1", "Tab2", "Tab3" };
Context context;
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public Fragment getItem(int position) {
switch (position) {
// Open FragmentTab1.java
case 0:
FragmentTab1 fragmenttab1 = new FragmentTab1();
return fragmenttab1;
// Open FragmentTab2.java
case 1:
FragmentTab2 fragmenttab2 = new FragmentTab2();
return fragmenttab2;
// Open FragmentTab3.java
case 2:
FragmentTab3 fragmenttab3 = new FragmentTab3();
return fragmenttab3;
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
}
Styles.xml:
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="windowActionBar">true</item>
<item name="windowNoTitle">false</item>
</style>
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.zohaibsiddique.myapplication">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/tool_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="10dp"
app:theme="#style/ThemeOverlay.AppCompat.Dark"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
android:minHeight="?attr/actionBarSize" />
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.PagerTabStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/tab_strip"
android:layout_gravity="top"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:textColor="#000000" />
</android.support.v4.view.ViewPager>
</LinearLayout>
Add the PagerTabStrip to display page title :
<android.support.v4.view.ViewPager
android:id="#+id/vpPager"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.PagerTabStrip
android:id="#+id/pager_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:paddingBottom="4dp"
android:paddingTop="4dp" />
</android.support.v4.view.ViewPager>
For more details, please see this link:
https://github.com/codepath/android_guides/wiki/ViewPager-with-FragmentPagerAdapter
I resolves my problem by myself. I just extends MainActivity to AppCompatActivity and re-appear action bar.
Saw the new guideline came out, and used in google photos latest app.
Have no idea how to use the new Bottom Navigation Bar.
See through the new support lib, didn't find any lead.
Can not find any official sample.
How to use the new Bottom bar? Don't want to do any customize.
I think you might looking for this.
Here's a quick snippet to get started:
public class MainActivity extends AppCompatActivity {
private BottomBar mBottomBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Notice how you don't use the setContentView method here! Just
// pass your layout to bottom bar, it will be taken care of.
// Everything will be just like you're used to.
mBottomBar = BottomBar.bind(this, R.layout.activity_main,
savedInstanceState);
mBottomBar.setItems(
new BottomBarTab(R.drawable.ic_recents, "Recents"),
new BottomBarTab(R.drawable.ic_favorites, "Favorites"),
new BottomBarTab(R.drawable.ic_nearby, "Nearby"),
new BottomBarTab(R.drawable.ic_friends, "Friends")
);
mBottomBar.setOnItemSelectedListener(new OnTabSelectedListener() {
#Override
public void onItemSelected(final int position) {
// the user selected a new tab
}
});
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mBottomBar.onSaveInstanceState(outState);
}
}
Here is reference link.
https://github.com/roughike/BottomBar
EDIT New Releases.
The Bottom Navigation View has been in the material design guidelines for some time, but it hasn’t been easy for us to implement it into our apps. Some applications have built their own solutions, whilst others have relied on third-party open-source libraries to get the job done. Now the design support library is seeing the addition of this bottom navigation bar, let’s take a dive into how we can use it!
How to use ?
To begin with we need to update our dependency!
compile ‘com.android.support:design:25.0.0’
Design xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">
<!-- Content Container -->
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:itemBackground="#color/colorPrimary"
app:itemIconTint="#color/white"
app:itemTextColor="#color/white"
app:menu="#menu/bottom_navigation_main" />
</RelativeLayout>
Create menu as per your requirement.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/action_favorites"
android:enabled="true"
android:icon="#drawable/ic_favorite_white_24dp"
android:title="#string/text_favorites"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_schedules"
android:enabled="true"
android:icon="#drawable/ic_access_time_white_24dp"
android:title="#string/text_schedules"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_music"
android:enabled="true"
android:icon="#drawable/ic_audiotrack_white_24dp"
android:title="#string/text_music"
app:showAsAction="ifRoom" />
</menu>
Handling Enabled / Disabled states. Make selector file.
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_checked="true"
android:color="#color/colorPrimary" />
<item
android:state_checked="false"
android:color="#color/grey" />
</selector>
Handle click events.
BottomNavigationView bottomNavigationView = (BottomNavigationView)
findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(
new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_favorites:
break;
case R.id.action_schedules:
break;
case R.id.action_music:
break;
}
return false;
}
});
Edit : Using Androidx you just need to add below dependencies.
implementation 'com.google.android.material:material:1.2.0-alpha01'
Layout
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_gravity="bottom"
app:menu="#menu/bottom_navigation_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</FrameLayout>
If you want to read more about it's methods and how it works read this.
Surely it will help you.
You should use BottomNavigationView from v25 Android Support Library.
It represents a standard bottom navigation bar for application.
Here is a post on Medium that has a step by step guide:
https://medium.com/#hitherejoe/exploring-the-android-design-support-library-bottom-navigation-drawer-548de699e8e0#.9vmiekxze
My original answer dealt with the BottomNavigationView, but now there is a BottomAppBar. I added a section at the top for that with an implementation link.
Bottom App Bar
The BottomAppBar supports a Floating Action Button.
Image from here. See the documentation and this tutorial for help setting up the BottomAppBar.
Bottom Navigation View
The following full example shows how to make a Bottom Navigation View similar to the image in the question. See also Bottom Navigation in the documentation.
Add the design support library
Add this line to your app's build.grade file next to the other support library things.
implementation 'com.android.support:design:28.0.0'
Replace the version number with whatever is current.
Create the Activity layout
The only special thing we have added to the layout is the BottomNavigationView. To change the color of the icon and text when it is clicked, you can use a selector instead of specifying the color directly. This is omitted for simplicity here.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:menu="#menu/bottom_nav_menu"
app:itemBackground="#color/colorPrimary"
app:itemIconTint="#android:color/white"
app:itemTextColor="#android:color/white" />
</RelativeLayout>
Notice that we used layout_alignParentBottom to actually put it at the bottom.
Define the menu items
The xml above for Bottom Navigation View referred to bottom_nav_menu. This is what defines each item in our view. We will make it now. All you have to do is add a menu resource just like you would for an Action Bar or Toolbar.
bottom_nav_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/action_recents"
android:enabled="true"
android:icon="#drawable/ic_action_recents"
android:title="Recents"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_favorites"
android:enabled="true"
android:icon="#drawable/ic_action_favorites"
android:title="Favorites"
app:showAsAction="ifRoom" />
<item
android:id="#+id/action_nearby"
android:enabled="true"
android:icon="#drawable/ic_action_nearby"
android:title="Nearby"
app:showAsAction="ifRoom" />
</menu>
You will need to add the appropriate icons to your project. This is not very difficult if you go to File > New > Image Asset and choose Action Bar and Tab Icons as the Icon Type.
Add an item selected listener
There is nothing special happening here. We just add a listener to the Bottom Navigation Bar in our Activity's onCreate method.
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_recents:
Toast.makeText(MainActivity.this, "Recents", Toast.LENGTH_SHORT).show();
break;
case R.id.action_favorites:
Toast.makeText(MainActivity.this, "Favorites", Toast.LENGTH_SHORT).show();
break;
case R.id.action_nearby:
Toast.makeText(MainActivity.this, "Nearby", Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
}
}
Need more help?
I learned how to do this watching the following YouTube video. The computer voice is a little strange, but the demonstration is very clear.
Android Studio Tutorial - Bottom Navigation View
You can also use Tab Layout with custom tab view to achieve this.
custom_tab.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="?attr/selectableItemBackground"
android:gravity="center"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingTop="8dp">
<ImageView
android:id="#+id/icon"
android:layout_width="24dp"
android:layout_height="24dp"
android:scaleType="centerInside"
android:src="#drawable/ic_recents_selector" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="1"
android:textAllCaps="false"
android:textColor="#color/tab_color"
android:textSize="12sp"/>
</LinearLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
style="#style/AppTabLayout"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="?attr/colorPrimary" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private TabLayout mTabLayout;
private int[] mTabsIcons = {
R.drawable.ic_recents_selector,
R.drawable.ic_favorite_selector,
R.drawable.ic_place_selector};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Setup the viewPager
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
MyPagerAdapter pagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(pagerAdapter);
mTabLayout = (TabLayout) findViewById(R.id.tab_layout);
mTabLayout.setupWithViewPager(viewPager);
for (int i = 0; i < mTabLayout.getTabCount(); i++) {
TabLayout.Tab tab = mTabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
mTabLayout.getTabAt(0).getCustomView().setSelected(true);
}
private class MyPagerAdapter extends FragmentPagerAdapter {
public final int PAGE_COUNT = 3;
private final String[] mTabsTitle = {"Recents", "Favorites", "Nearby"};
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
public View getTabView(int position) {
// Given you have a custom layout in `res/layout/custom_tab.xml` with a TextView and ImageView
View view = LayoutInflater.from(MainActivity.this).inflate(R.layout.custom_tab, null);
TextView title = (TextView) view.findViewById(R.id.title);
title.setText(mTabsTitle[position]);
ImageView icon = (ImageView) view.findViewById(R.id.icon);
icon.setImageResource(mTabsIcons[position]);
return view;
}
#Override
public Fragment getItem(int pos) {
switch (pos) {
case 0:
return PageFragment.newInstance(1);
case 1:
return PageFragment.newInstance(2);
case 2:
return PageFragment.newInstance(3);
}
return null;
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public CharSequence getPageTitle(int position) {
return mTabsTitle[position];
}
}
}
Download Complete Sample Project
Google has launched the BottomNavigationView after the version 25.0.0 of the design support library. But it came with the following limitations:
You can't remove titles and center icon.
You cant't change titles text size.
Y̶o̶u̶ ̶c̶a̶n̶'̶t̶ ̶c̶h̶a̶n̶g̶e̶ ̶t̶h̶e̶ ̶b̶a̶c̶k̶g̶r̶o̶u̶n̶d̶ ̶c̶o̶l̶o̶r̶ ̶i̶t̶ ̶i̶s̶ ̶a̶l̶w̶a̶y̶s̶ ̶t̶h̶e̶ ̶c̶o̶l̶o̶r̶P̶r̶i̶m̶a̶r̶y̶.̶
It doesn't have a BottomNavigationBehavior: so no integration with FAB or SnackBar through CordinatorLayout.
Every menuItem is a pure extension of FrameLayout so it doesn't have any nice circle reveal effect
So the max you can do with this fist version of BottomNavigationView is: (without any reflection or implementing the lib by yourself).
So, If you want any of these. You can use a third part library like roughike/BottomBar or implement the lib by yourself.
As Sanf0rd mentioned, Google launched the BottomNavigationView as part of the Design Support Library version 25.0.0. The limitations he mentioned are mostly true, except that you CAN change the background color of the view and even the text color and icon tint color. It also has an animation when you add more than 4 items (sadly it cannot be enabled or disabled manually).
I wrote a detailed tutorial about it with examples and an accompanying repository, which you can read here:
https://blog.autsoft.hu/now-you-can-use-the-bottom-navigation-view-in-the-design-support-library/
The gist of it
You have to add these in your app level build.gradle:
compile 'com.android.support:appcompat-v7:25.0.0'
compile 'com.android.support:design:25.0.0'
You can include it in your layout like this:
<android.support.design.widget.BottomNavigationView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/bottom_navigation_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:itemBackground="#color/darkGrey"
app:itemIconTint="#color/bottom_navigation_item_background_colors"
app:itemTextColor="#color/bottom_navigation_item_background_colors"
app:menu="#menu/menu_bottom_navigation" />
You can specify the items via a menu resource like this:
<?xml version="1.0" encoding="utf-8"?>
<menu
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/action_one"
android:icon="#android:drawable/ic_dialog_map"
android:title="One"/>
<item
android:id="#+id/action_two"
android:icon="#android:drawable/ic_dialog_info"
android:title="Two"/>
<item
android:id="#+id/action_three"
android:icon="#android:drawable/ic_dialog_email"
android:title="Three"/>
<item
android:id="#+id/action_four"
android:icon="#android:drawable/ic_popup_reminder"
android:title="Four"/>
</menu>
And you can set the tint and text color as a color list, so the currently selected item is highlighted:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:color="#color/colorAccent"
android:state_checked="false"/>
<item
android:color="#android:color/white"
android:state_checked="true"/>
</selector>
Finally, you can handle the selection of the items with an OnNavigationItemSelectedListener:
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Fragment fragment = null;
switch (item.getItemId()) {
case R.id.action_one:
// Switch to page one
break;
case R.id.action_two:
// Switch to page two
break;
case R.id.action_three:
// Switch to page three
break;
}
return true;
}
});
Other alternate library you can try :- https://github.com/Ashok-Varma/BottomNavigation
<com.ashokvarma.bottomnavigation.BottomNavigationBar
android:layout_gravity="bottom"
android:id="#+id/bottom_navigation_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
BottomNavigationBar bottomNavigationBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation_bar);
bottomNavigationBar
.addItem(new BottomNavigationItem(R.drawable.ic_home_white_24dp, "Home"))
.addItem(new BottomNavigationItem(R.drawable.ic_book_white_24dp, "Books"))
.addItem(new BottomNavigationItem(R.drawable.ic_music_note_white_24dp, "Music"))
.addItem(new BottomNavigationItem(R.drawable.ic_tv_white_24dp, "Movies & TV"))
.addItem(new BottomNavigationItem(R.drawable.ic_videogame_asset_white_24dp, "Games"))
.initialise();
i've made a private class which uses a gridview and a menu resource:
private class BottomBar {
private GridView mGridView;
private Menu mMenu;
private BottomBarAdapter mBottomBarAdapter;
private View.OnClickListener mOnClickListener;
public BottomBar (#IdRes int gridviewId, #MenuRes int menuRes,View.OnClickListener onClickListener) {
this.mGridView = (GridView) findViewById(gridviewId);
this.mMenu = getMenu(menuRes);
this.mOnClickListener = onClickListener;
this.mBottomBarAdapter = new BottomBarAdapter();
this.mGridView.setAdapter(mBottomBarAdapter);
}
private Menu getMenu(#MenuRes int menuId) {
PopupMenu p = new PopupMenu(MainActivity.this,null);
Menu menu = p.getMenu();
getMenuInflater().inflate(menuId,menu);
return menu;
}
public GridView getGridView(){
return mGridView;
}
public void show() {
mGridView.setVisibility(View.VISIBLE);
mGridView.animate().translationY(0);
}
public void hide() {
mGridView.animate().translationY(mGridView.getHeight());
}
private class BottomBarAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public BottomBarAdapter(){
this.mInflater = LayoutInflater.from(MainActivity.this);
}
#Override
public int getCount() {
return mMenu.size();
}
#Override
public Object getItem(int i) {
return mMenu.getItem(i);
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
MenuItem item = (MenuItem) getItem(i);
if (view==null){
view = mInflater.inflate(R.layout.your_item_layout,null);
view.setId(item.getItemId());
}
view.setOnClickListener(mOnClickListener);
view.findViewById(R.id.bottomnav_icon).setBackground(item.getIcon());
((TextView) view.findViewById(R.id.bottomnav_label)).setText(item.getTitle());
return view;
}
}
your_menu.xml:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/item1_id"
android:icon="#drawable/ic_item1"
android:title="#string/title_item1"/>
<item android:id="#+id/item2_id"
android:icon="#drawable/ic_item2"
android:title="#string/title_item2"/>
...
</menu>
and a custom layout item your_item_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="16dp">
<ImageButton android:id="#+id/bottomnav_icon"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_gravity="top|center_horizontal"
android:layout_marginTop="8dp"
android:layout_marginBottom="4dp"/>
<TextView android:id="#+id/bottomnav_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="8dp"
android:layout_marginTop="4dp"
style="#style/mystyle_label" />
</LinearLayout>
usage inside your mainactivity:
BottomBar bottomBar = new BottomBar(R.id.YourGridView,R.menu.your_menu, mOnClickListener);
and
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.item1_id:
//todo item1
break;
case R.id.item2_id:
//todo item2
break;
...
}
}
}
and in layout_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
...
<FrameLayout android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<GridView android:id="#+id/bottomNav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/your_background_color"
android:verticalSpacing="0dp"
android:horizontalSpacing="0dp"
android:numColumns="4"
android:stretchMode="columnWidth"
app:layout_anchor="#id/fragment_container"
app:layout_anchorGravity="bottom"/>
</android.support.design.widget.CoordinatorLayout>
I think this is also be useful.
Snippet
public class MainActivity : AppCompatActivity, BottomNavigationBar.Listeners.IOnTabSelectedListener
{
private BottomBar _bottomBar;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.MainActivity);
_bottomBar = BottomBar.Attach(this, bundle);
_bottomBar.SetItems(
new BottomBarTab(Resource.Drawable.ic_recents, "Recents"),
new BottomBarTab(Resource.Drawable.ic_favorites, "Favorites"),
new BottomBarTab(Resource.Drawable.ic_nearby, "Nearby")
);
_bottomBar.SetOnItemSelectedListener(this);
_bottomBar.HideShadow();
_bottomBar.UseDarkTheme(true);
_bottomBar.SetTypeFace("Roboto-Regular.ttf");
var badge = _bottomBar.MakeBadgeForTabAt(1, Color.ParseColor("#f02d4c"), 1);
badge.AutoShowAfterUnSelection = true;
}
public void OnItemSelected(int position)
{
}
protected override void OnSaveInstanceState(Bundle outState)
{
base.OnSaveInstanceState(outState);
// Necessary to restore the BottomBar's state, otherwise we would
// lose the current tab on orientation change.
_bottomBar.OnSaveInstanceState(outState);
}
}
Links
https://github.com/pocheshire/BottomNavigationBar
It's https://github.com/roughike/BottomBar ported to C# for Xamarin developers
There is a new official BottomNavigationView in version 25 of the Design Support Library
https://developer.android.com/reference/android/support/design/widget/BottomNavigationView.html
add in gradle
compile 'com.android.support:design:25.0.0'
XML
<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="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
design:menu="#menu/my_navigation_items" />
This library, BottomNavigationViewEx, extends Google's BottomNavigationView. You can easily customise Google's library to have bottom navigation bar the way you want it to be. You can disable the shifting mode, change visibility of the icons and texts and so much more. Definitely try it out.
I have referred this github post and I have set the three layouts for three fragment pages in bottom tab bar.
FourButtonsActivity.java:
bottomBar.setFragmentItems(getSupportFragmentManager(), R.id.fragmentContainer,
new BottomBarFragment(LibraryFragment.newInstance(R.layout.library_fragment_layout), R.drawable.ic_update_white_24dp, "Recents"),
new BottomBarFragment(PhotoEffectFragment.newInstance(R.layout.photo_effect_fragment), R.drawable.ic_local_dining_white_24dp, "Food"),
new BottomBarFragment(VideoFragment.newInstance(R.layout.video_layout), R.drawable.ic_favorite_white_24dp, "Favorites")
);
To set the badge count :
BottomBarBadge unreadMessages = bottomBar.makeBadgeForTabAt(1, "#E91E63", 4);
unreadMessages.show();
unreadMessages.setCount(4);
unreadMessages.setAnimationDuration(200);
unreadMessages.setAutoShowAfterUnSelection(true);
LibraryFragment.java:
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class LibraryFragment extends Fragment {
private static final String STARTING_TEXT = "Four Buttons Bottom Navigation";
public LibraryFragment() {
}
public static LibraryFragment newInstance(int resource) {
Bundle args = new Bundle();
args.putInt(STARTING_TEXT, resource);
LibraryFragment sampleFragment = new LibraryFragment();
sampleFragment.setArguments(args);
return sampleFragment;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = LayoutInflater.from(getActivity()).inflate(
getArguments().getInt(STARTING_TEXT), null);
return view;
}
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:menu="#menu/navigation" />
navigation.xml(inside menu)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/navigation_home"
android:icon="#drawable/ic_home_black_24dp"
android:title="#string/title_home"
app:showAsAction="always|withText"
android:enabled="true"/>
Inside onCreate() method,
BottomNavigationView navigation = (BottomNavigationView)findViewById(R.id.navigation);
//Dont forgot this line
BottomNavigationViewHelper.disableShiftMode(navigation);
And Create class as below.
public class BottomNavigationViewHelper {
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
//noinspection RestrictedApi
item.setShiftingMode(false);
// set once again checked value, so view will be updated
//noinspection RestrictedApi
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
}
You can create the layouts according to the above-mentioned answers
If anyone wants to use this in kotlin:-
private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener { item ->
when (item.itemId) {
R.id.images -> {
// do your work....
return#OnNavigationItemSelectedListener true
}
R.id.videos ->
{
// do your work....
return#OnNavigationItemSelectedListener true
}
}
false
}
then in oncreate you can set the above listener to your view
mDataBinding?.navigation?.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
Hello I am trying to put a TabLayout inside the ActionBar, not below it. Is it possible to be done?
I have searched around and found the ActionBar.Tab class, but it is already deprecated. Any other ideas please?
You can create your own Layout with back button and Tab Layout. You can use this layout at top with no ActionBar. On Back click programmatically call onBackPressed() method.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageButton
android:layout_width="48dp"
android:layout_height="48dp"
android:background="?selectableItemBackgroundBorderless"
android:src="#drawable/ic_back" />
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
I used the library below for tabs in example code. (Add the line to your app's gradle)
compile 'com.jpardogo.materialtabstrip:library:1.1.0'
And than you can use a toolbar layout like below:
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
style="#style/Widget.MyApp.Toolbar.Solid" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="#dimen/abc_action_bar_default_height_material"
android:layout_below="#+id/toolbar">
<com.astuetz.PagerSlidingTabStrip
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="#dimen/abc_action_bar_default_height_material"
android:background="#color/AppPrimary"
app:pstsIndicatorColor="#fff"
app:pstsIndicatorHeight="4dp"
app:pstsTabTextAllCaps="false"
app:pstsTabTextColor="#color/tabTextColor"
app:pstsTabTextSize="16sp"
app:pstsUnderlineColor="#color/AppPrimary"
app:pstsUnderlineHeight="4dp" />
</RelativeLayout>
</RelativeLayout>
Here are the styles i used in example layout:
<style name="Widget.MyApp.Toolbar.Solid" parent="Widget.AppCompat.ActionBar">
<item name="android:background">#color/AppPrimary</item>
<item name="android:theme">#style/ThemeOverlay.MyApp.ActionBar</item>
<item name="popupTheme">#style/ThemeOverlay.AppCompat.Light</item>
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">#dimen/abc_action_bar_default_height_material</item>
</style>
<style name="ThemeOverlay.MyApp.ActionBar" parent="ThemeOverlay.AppCompat.ActionBar">
<!-- Parent theme sets colorControlNormal to textColorPrimary. -->
<item name="android:textColorPrimary">#android:color/white</item>
</style>
In your activity's layout you have to include your toolbar like below:
<include
android:id="#+id/toolbar_main"
layout="#layout/toolbar_tabs" />
And you have to set your toolbar as support actionbar and to use it as an actonbar.
Toolbar mToolbar = (Toolbar)findviewById(R.id.toolbar_main);
setSupportActionBar(mToolbar);
Add a viewpager to your activity's layout: (Where you add your toolbar)
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
/>
Create an adapter for your viewpager like below:
public class TabsAdapter extends FragmentPagerAdapter {
private List<YourModel> mObjects;
public TabsAdapter(FragmentManager fm, List<YourModel> mObjects) {
super(fm);
this.mObjects = mObjects;
}
#Override
public Fragment getItem(int position) {
return new YourPagerFragment();
}
#Override
public int getCount() {
return mObjects.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mObjects.get(position).getName();
}
}
Finally, find your viewpager, pager sliding tab strip, create a new pager adapter and set it to your viewpager like below:
ViewPager mViewPager = (ViewPager) findViewById(R.id.viewpager);
PagerSlidingTabStrip mTabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
TabsAdapter mAdapter = new TabsAdapter(getSupportFragmentManager(), objects);
mViewPager.setAdapter(mAdapter);
mTabs.setViewPager(mViewPager);
Good luck.
In my application I am using actionbar tabs at bottom. I have searched many tutorials but I am not understanding the solutions. Most of the answers said to use TabActivity, but that is deprecated. So can any one tell me how can approach this?
The best way to implement tabs now is to use a TabLayout from the design library.
Here is an example of a TabLayout aligned at the bottom of the screen.
First set up the dependencies in the build.gradle file:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:design:23.0.1'
}
Here is the layout xml for the Main Activity:
<RelativeLayout
android:id="#+id/main_layout"
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">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="?attr/colorPrimary"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/toolbar"/>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
app:tabMode="fixed"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="6dp"
app:tabTextColor="#d3d3d3"
app:tabSelectedTextColor="#ffffff"
app:tabIndicatorColor="#ff00ff"
android:minHeight="?attr/actionBarSize"
android:layout_alignParentBottom="true"
/>
</RelativeLayout>
Here is the Activity code:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Get the ViewPager and set it's PagerAdapter so that it can display items
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
PagerAdapter pagerAdapter =
new PagerAdapter(getSupportFragmentManager(), MainActivity.this);
viewPager.setAdapter(pagerAdapter);
// Give the TabLayout the ViewPager
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(viewPager);
// Iterate over all tabs and set the custom view
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class PagerAdapter extends FragmentPagerAdapter {
String tabTitles[] = new String[] { "Tab One", "Tab Two", "Tab Three", };
Context context;
public PagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
#Override
public int getCount() {
return tabTitles.length;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new BlankFragment();
case 1:
return new BlankFragment();
case 2:
return new MapFragment();
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
public View getTabView(int position) {
View tab = LayoutInflater.from(MainActivity.this).inflate(R.layout.custom_tab, null);
TextView tv = (TextView) tab.findViewById(R.id.custom_text);
tv.setText(tabTitles[position]);
return tab;
}
}
}
custom_tab.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/custom_text"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="?attr/selectableItemBackground"
android:gravity="center"
android:textSize="16dip"
android:textColor="#ffffff"
android:singleLine="true"
/>
</LinearLayout>
App theme in styles.xml:
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- your app branding color for the app bar -->
<item name="colorPrimary">#3F51B5</item>
<!-- darker variant for the status bar and contextual app bars -->
<item name="colorPrimaryDark">#303F9F</item>
<!-- theme UI controls like checkboxes and text fields -->
<item name="colorAccent">#FF4081</item>
</style>
Result:
If you want to hide the ActionBar, just remove the toolbar from the layout xml, and remove the toolbar code from the Activity, and make sure to use Theme.AppCompat.Light.NoActionBar in the AppTheme. The result of those changes would make it look like this:
this is an example
Toolbar toolbarBottom = (Toolbar) findViewById(R.id.toolbar_bottom);
toolbarBottom.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
switch(item.getItemId()){
case R.id.action_settings:
// TODO
break;
// TODO: Other cases
}
return true;
}
});
// Inflate a menu to be displayed in the toolbar
toolbarBottom.inflateMenu(R.menu.menu_main);
and this xml
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_bottom"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:background="?attr/colorPrimary"
android:layout_alignParentBottom="true"
android:minHeight="?attr/actionBarSize" />
Step 1 - Create a custom layout for your toolbar.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
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="wrap_content"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
Step 2 - Include this layout into your activity layout. Give it the bottom position.
<include
android:id="#+id/toolbar_main"
layout="#layout/main_toolbar" />
Step 3 - Call the toolbar into your activity and done. It will behave as any toolbar but positioned at bottom.