Android Bottom Navigation stays at the bottom of the screen providing navigation between top-level views in the app. This is introduced in design support library with backward compatibility. Bottom Navigation should be used when the app has three to five top-level navigations.

This article explains the basics of Bottom Navigation, combining it with Fragments. We also going to learn how to load the first fragment with grid data (using RecyclerView) by fetching JSON through HTTP call.

android-bottom-naviation-tutorial-using-fragments

1. Bottom Navigation

The Bottom Navigation can be easily added using BottomNavigationView component. You have to use gravitation or relative attributes to make it appear at the bottom of the screen.

<?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">

    <FrameLayout
        android:id="@+id/frame_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <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:itemBackground="@color/bgBottomNavigation"
        android:foreground="?attr/selectableItemBackground"
        app:itemIconTint="@android:color/white"
        app:itemTextColor="@android:color/white"
        app:menu="@menu/navigation" />

</android.support.design.widget.CoordinatorLayout>

Here few important attributes have to noted down.

app:menu — The menu resource file to display the navigation items along with icon and text.
app:itemBackground — Applies background color to bottom navigation.
app:itemTextColor — The text color of bottom navigation item.
app:itemIconTint — The icon color of bottom navigation item.

When to use Bottom Navigation?
As per the design specs, the below navigations should be used depending on the criteria.

> Navigation Drawer – Use when top-level navigation has more than six destinations.

> Tabs – Use when there are two navigational destinations.

> Bottom Navigation – Use when there are three to five top-level destinations.

Before going further, have a quick look at the design specifications of Bottom Navigation.

android-bottom-navigation-tutorial

Now let’s try it by creating a new project in Android Studio.

2. Creating New Project

1. Create a new project in Android Studio from File ⇒ New Project and select Basic Activity from templates.

2. Download this res folder and add the drawables to your project’s res. This folder contains necessary drawables required for bottom navigation items.

3. Make sure you have design support library in your build.gradle.

dependencies {
    implementation 'com.android.support:design:26.1.0'
}

4. Add below color, string values to your colors.xml and strings.xml.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#7b4bff</color>
    <color name="colorPrimaryDark">#6539ba</color>
    <color name="colorAccent">#FF4081</color>
    <color name="bgBottomNavigation">#fe485a</color>
</resources>
<resources>
    <string name="app_name">Bottom Navigation</string>
    <string name="title_shop">Shop</string>
    <string name="title_gifts">Gifts</string>
    <string name="title_cart">Cart</string>
    <string name="title_profile">Profile</string>
</resources>

5. As the Bottom Navigation items rendered using a menu file, create a new xml named navigation.xml under res ⇒ menu folder.

6. Open the layout file of main activity i.e activity_main.xml and add BottomNavigationView widget. Here we are also adding a FrameLayout to load the Fragments when the navigation item is selected.

<?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/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="info.androidhive.bottomnavigation.MainActivity">

    <FrameLayout
        android:id="@+id/frame_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <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:itemBackground="@color/bgBottomNavigation"
        android:foreground="?attr/selectableItemBackground"
        app:itemIconTint="@android:color/white"
        app:itemTextColor="@android:color/white"
        app:menu="@menu/navigation" />

</android.support.design.widget.CoordinatorLayout>

7. Now open MainActivity.java and modify it as below.

> Here, OnNavigationItemSelectedListener will be called when the bottom navigation item is selected. For now we are just changing the toolbar title upon selecting the navigation item.

package info.androidhive.bottomnavigation;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

import info.androidhive.bottomnavigation.fragment.CartFragment;
import info.androidhive.bottomnavigation.fragment.GiftsFragment;
import info.androidhive.bottomnavigation.fragment.ProfileFragment;
import info.androidhive.bottomnavigation.fragment.StoreFragment;
import info.androidhive.bottomnavigation.helper.BottomNavigationBehavior;

public class MainActivity extends AppCompatActivity {

    private ActionBar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        toolbar = getSupportActionBar();

        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

        toolbar.setTitle("Shop");
    }

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            Fragment fragment;
            switch (item.getItemId()) {
                case R.id.navigation_shop:
                    toolbar.setTitle("Shop");
                    return true;
                case R.id.navigation_gifts:
                    toolbar.setTitle("My Gifts");
                    return true;
                case R.id.navigation_cart:
                    toolbar.setTitle("Cart");
                    return true;
                case R.id.navigation_profile:
                    toolbar.setTitle("Profile");
                    return true;
            }
            return false;
        }
    };
}

If you run the app, you can see the bottom navigation displayed as shown below.

android-bottom-navigation-with-fragments

3. Adding Fragments

As we have the Bottom Navigation ready, let’s see how to switch views when the navigation menu item is selected. This can be done easily by using the Fragments.

Note: ViewPager shouldn’t be used when using Bottom Navigation as per design specs (Avoid using lateral motion to transition between views)

I am creating four fragments named StoreFragment, GiftsFragment, CartFragment and ProfileFragment.

8. Create new Fragment by going to File ⇒ New ⇒ Fragment ⇒ Fragment (Blank) and name it as StoreFragment.java. Likewise create other three fragments too.

9. Open MainActivity.java and modify bottom navigation listener as below to load the fragments in FrameLayout.

> loadFragment() – loads the Fragment into FrameLayout. The same method is called in OnNavigationItemSelectedListener callback by passing appropriate fragment instance.
> The logic needed for specific module goes into appropriate Fragment keeping the MainActivity clean.

package info.androidhive.bottomnavigation;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

import info.androidhive.bottomnavigation.fragment.CartFragment;
import info.androidhive.bottomnavigation.fragment.GiftsFragment;
import info.androidhive.bottomnavigation.fragment.ProfileFragment;
import info.androidhive.bottomnavigation.fragment.StoreFragment;
import info.androidhive.bottomnavigation.helper.BottomNavigationBehavior;

public class MainActivity extends AppCompatActivity {

    private ActionBar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        toolbar = getSupportActionBar();

        // load the store fragment by default
        toolbar.setTitle("Shop");
        loadFragment(new StoreFragment());
    }

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            Fragment fragment;
            switch (item.getItemId()) {
                case R.id.navigation_shop:
                    toolbar.setTitle("Shop");
                    fragment = new StoreFragment();
                    loadFragment(fragment);
                    return true;
                case R.id.navigation_gifts:
                    toolbar.setTitle("My Gifts");
                    fragment = new GiftsFragment();
                    loadFragment(fragment);
                    return true;
                case R.id.navigation_cart:
                    toolbar.setTitle("Cart");
                    fragment = new CartFragment();
                    loadFragment(fragment);
                    return true;
                case R.id.navigation_profile:
                    toolbar.setTitle("Profile");
                    fragment = new ProfileFragment();
                    loadFragment(fragment);
                    return true;
            }

            return false;
        }
    };

    private void loadFragment(Fragment fragment) {
        // load fragment
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.frame_container, fragment);
        transaction.addToBackStack(null);
        transaction.commit();
    }

}

Now if you run the project you can see the fragments loaded when navigation is selected.

4. Implementing ShopFragment – Displaying Items in Grid

Now we’ll see how to implement the first fragment i.e ShopFragment which displays the shop items in a Grid fashion. For demonstration, I have created a sample json which contains few movies for sale. To implement this, all we have to do is, fetch json and display the data in RecyclerView in a grid format. To make the task simpler, follow my other article which explains the same.

https://api.androidhive.info/json/movies_2017.json

10. Open build.gradle and add RecyclerView, CardView, Volley and Glide dependencies.

dependencies {
    // RecyclerView
    compile 'com.android.support:recyclerview-v7:26.1.0'

    // CardView
    compile 'com.android.support:cardview-v7:26.1.0'

    // volley http library
    implementation 'com.android.volley:volley:1.0.0'
    implementation 'com.google.code.gson:gson:2.6.2'

    // glide image library
    implementation 'com.github.bumptech.glide:glide:4.3.1'
}

11. Create a class named MyApplication.java implement the class from Application. This is a singleton class in which volley library will be initiated.

package info.androidhive.bottomnavigation.app;

import android.app.Application;
import android.text.TextUtils;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

public class MyApplication extends Application {

    public static final String TAG = MyApplication.class
            .getSimpleName();

    private RequestQueue mRequestQueue;

    private static MyApplication mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }

    public static synchronized MyApplication getInstance() {
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }

        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req, String tag) {
        // set the default tag if tag is empty
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }
}

12. Open AndroidManifest.xml and add MyApplication to <application> tag. We also need INTERNET permission as we gonna make http calls.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="info.androidhive.bottomnavigation">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:name=".app.MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

13. Open the layout file of StoreFragment i.e fragment_store.xml and add below layout code. Here we are adding the RecyclerView component.

<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f1f5f7"
    tools:context="info.androidhive.bottomnavigation.fragment.StoreFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingTop="10dp"
            android:text="New Release Films"
            android:textColor="#111"
            android:textSize="16dp" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:clipToPadding="false"
            android:scrollbars="vertical" />
    </LinearLayout>
</android.support.v4.widget.NestedScrollView>

14. Create an xml layout named store_item_row.xml under res ⇒ layout. This layout file will be used in RecyclerView adapter class to render single item.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_margin="@dimen/card_margin"
        android:clickable="true"
        android:elevation="3dp"
        android:foreground="?attr/selectableItemBackground"
        card_view:cardCornerRadius="@dimen/card_album_radius">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ImageView
                android:id="@+id/thumbnail"
                android:layout_width="match_parent"
                android:layout_height="@dimen/album_cover_height"
                android:background="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:scaleType="fitXY" />

            <TextView
                android:id="@+id/title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/thumbnail"
                android:lines="2"
                android:paddingLeft="@dimen/album_title_padding"
                android:paddingRight="@dimen/album_title_padding"
                android:paddingTop="@dimen/album_title_padding"
                android:textColor="#111"
                android:textSize="11dp" />

            <TextView
                android:id="@+id/price"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/title"
                android:layout_marginRight="10dp"
                android:gravity="right"
                android:paddingBottom="@dimen/songs_count_padding_bottom"
                android:textColor="@color/colorAccent"
                android:textSize="11dp" />

        </RelativeLayout>

    </android.support.v7.widget.CardView>
</LinearLayout>

15. Create a class named Movie.java. This POJO class will be useful while parsing the json.

package info.androidhive.bottomnavigation;

public class Movie {
    String title;
    String image;
    String price;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public String getPrice() {
        return price;
    }

    public void setPrice(String price) {
        this.price = price;
    }
}

16. Now open StoreFragment.java and add below code. For simplicity the RecyclerView adapter class StoreAdapter included in the same fragment.

> fetchStoreItems() Method fetches the movies json using Volley and serializes it using Gson.

> StoreAdapter class renders the movies in RecyclerView.

package info.androidhive.bottomnavigation.fragment;


import android.content.Context;
import android.content.res.Resources;
import android.graphics.Rect;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.bumptech.glide.Glide;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import org.json.JSONArray;

import java.util.ArrayList;
import java.util.List;

import info.androidhive.bottomnavigation.Movie;
import info.androidhive.bottomnavigation.app.MyApplication;
import info.androidhive.bottomnavigation.R;

public class StoreFragment extends Fragment {

    private static final String TAG = StoreFragment.class.getSimpleName();
    private static final String URL = "https://api.androidhive.info/json/movies_2017.json";

    private RecyclerView recyclerView;
    private List<Movie> movieList;
    private StoreAdapter mAdapter;

    public StoreFragment() {
        // Required empty public constructor
    }

    public static StoreFragment newInstance(String param1, String param2) {
        StoreFragment fragment = new StoreFragment();
        Bundle args = new Bundle();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_store, container, false);

        recyclerView = view.findViewById(R.id.recycler_view);
        movieList = new ArrayList<>();
        mAdapter = new StoreAdapter(getActivity(), movieList);

        RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 3);
        recyclerView.setLayoutManager(mLayoutManager);
        recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(8), true));
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(mAdapter);
        recyclerView.setNestedScrollingEnabled(false);

        fetchStoreItems();

        return view;
    }

    private void fetchStoreItems() {
        JsonArrayRequest request = new JsonArrayRequest(URL,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        if (response == null) {
                            Toast.makeText(getActivity(), "Couldn't fetch the store items! Pleas try again.", Toast.LENGTH_LONG).show();
                            return;
                        }

                        List<Movie> items = new Gson().fromJson(response.toString(), new TypeToken<List<Movie>>() {
                        }.getType());

                        movieList.clear();
                        movieList.addAll(items);

                        // refreshing recycler view
                        mAdapter.notifyDataSetChanged();
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // error in getting json
                Log.e(TAG, "Error: " + error.getMessage());
                Toast.makeText(getActivity(), "Error: " + error.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });

        MyApplication.getInstance().addToRequestQueue(request);
    }

    public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {

        private int spanCount;
        private int spacing;
        private boolean includeEdge;

        public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge) {
            this.spanCount = spanCount;
            this.spacing = spacing;
            this.includeEdge = includeEdge;
        }

        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            int position = parent.getChildAdapterPosition(view); // item position
            int column = position % spanCount; // item column

            if (includeEdge) {
                outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
                outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)

                if (position < spanCount) { // top edge
                    outRect.top = spacing;
                }
                outRect.bottom = spacing; // item bottom
            } else {
                outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
                outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f /    spanCount) * spacing)
                if (position >= spanCount) {
                    outRect.top = spacing; // item top
                }
            }
        }
    }

    /**
     * Converting dp to pixel
     */
    private int dpToPx(int dp) {
        Resources r = getResources();
        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics()));
    }

    class StoreAdapter extends RecyclerView.Adapter<StoreAdapter.MyViewHolder> {
        private Context context;
        private List<Movie> movieList;

        public class MyViewHolder extends RecyclerView.ViewHolder {
            public TextView name, price;
            public ImageView thumbnail;

            public MyViewHolder(View view) {
                super(view);
                name = view.findViewById(R.id.title);
                price = view.findViewById(R.id.price);
                thumbnail = view.findViewById(R.id.thumbnail);
            }
        }


        public StoreAdapter(Context context, List<Movie> movieList) {
            this.context = context;
            this.movieList = movieList;
        }

        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View itemView = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.store_item_row, parent, false);

            return new MyViewHolder(itemView);
        }

        @Override
        public void onBindViewHolder(MyViewHolder holder, final int position) {
            final Movie movie = movieList.get(position);
            holder.name.setText(movie.getTitle());
            holder.price.setText(movie.getPrice());

            Glide.with(context)
                    .load(movie.getImage())
                    .into(holder.thumbnail);
        }

        @Override
        public int getItemCount() {
            return movieList.size();
        }
    }
}

Now if you run the app, you can see the ShopFragment displaying the movies in grid manner. Likewise you can implement other fragments too.

android-bottom-navigation-with-fragments-recyclerview

5. Hiding Bottom Navigation on Scroll

As per design specs, the Bottom Navigation has to be hidden when the content is scrolled giving more room to content on the screen. To achieve this, we need to attach the BottomNavigationBehavior to Bottom Navigation.

17. Create a class named BottomNavigationBehavior.java with the below code.

package info.androidhive.bottomnavigation.helper;

import android.content.Context;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;

public class BottomNavigationBehavior extends CoordinatorLayout.Behavior<BottomNavigationView> {

    public BottomNavigationBehavior() {
        super();
    }

    public BottomNavigationBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, BottomNavigationView child, View dependency) {
        boolean dependsOn = dependency instanceof FrameLayout;
        return dependsOn;
    }

    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View directTargetChild, View target, int nestedScrollAxes) {
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL;
    }

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, BottomNavigationView child, View target, int dx, int dy, int[] consumed) {
        if (dy < 0) {
            showBottomNavigationView(child);
        } else if (dy > 0) {
            hideBottomNavigationView(child);
        }
    }

    private void hideBottomNavigationView(BottomNavigationView view) {
        view.animate().translationY(view.getHeight());
    }

    private void showBottomNavigationView(BottomNavigationView view) {
        view.animate().translationY(0);
    }
}

18. Add the BottomNavigationBehavior using setBehavior() in MainActivity.java as shown below.


public class MainActivity extends AppCompatActivity {

    private ActionBar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);

        // attaching bottom sheet behaviour - hide / show on scroll
        CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) navigation.getLayoutParams();
        layoutParams.setBehavior(new BottomNavigationBehavior());

        // load the store fragment by default
        // ..
    }
}

Now if you test the app, you can see the Bottom Navigation sliding down when the app content is scrolled.

bottom navigation scroll listener
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Akkis
2 years ago

Thank you Ravi! Marry Christmas! Can you double check the direct link for .APK file of this project, please? Thank you once again!

Ravi Tamada
2 years ago
Reply to  Akkis

Hi Akkis,

Happy Christmas you too 🙂 I just tried the apk, it’s working fine for me.

Here is the link: http://download.androidhive.info/apk/bottom-navigation.apk

Akkis
2 years ago
Reply to  Ravi Tamada

Thanks for the reply. Everything works fine now. Maybe mobile Chrome had an issue. Marry Christmas!

Ravi Tamada
2 years ago
Reply to  Akkis

Ok Great 🙂

Protus Solutions
Protus Solutions
2 years ago
Reply to  Ravi Tamada

Ravi thanks for the nice tutorial, please can you provide a tutorial on how to sync sqlite to mysql and mysql to sqlite most of the tutorials out there are not well done. pleaseeeeeee

Ravi Tamada
2 years ago

I have to prepare one. Meanwhile you can check sync adapters from android docs.

Protus Solutions
Protus Solutions
2 years ago
Reply to  Ravi Tamada

Much respect, I personally acquired a lot of knowledge through this blog. Keep the spirit alive. We will be waiting

Ravi Tamada
2 years ago

Thanks Protus. I’ll do my best 🙂

Abdulwahid Mohammed
Abdulwahid Mohammed
2 years ago

I implement this lesson and got with error for nullpointer exception in the line
MyApplication.getInstance().addToRequestQueue(request);
This class is not created during the tutorial.
how to do that?

Ravi Tamada
2 years ago

Yes, I forgot few steps. Updated the article (added 11th and 12th steps), please check once.

Thanks for pointing that out 🙂

Abdulwahid Mohammed
Abdulwahid Mohammed
2 years ago
Reply to  Ravi Tamada

Thank you very much sir.
It is really helpful.

Andrew
Andrew
2 years ago

Add this android:name=”study.bottomnav2.app.MyApplication

in androidmanifest.xml
And app start on my phone

Ravi Tamada
2 years ago
Reply to  Andrew

Yes, updated the article.

Thank you.

Adewale Salami
Adewale Salami
2 years ago

Thank you Ravi, you are doing a good job by educating beginners like me with your knowledge. I have some challenges here. I am building a video player using recycler view to list all video files on my device and i am stuck. i want each row to include the title of the video, the size, date added and duration. could you help me out with a template code that i can study and improve on to achieve what i want. Thank you. Merry Xmas.

Abhishek Singh
Abhishek Singh
2 years ago

Thanks Ravi but there is a problem with bottom nav bar behaviour when we display snack bar it will hide below navigation bar if we use that behaviour.

Ravi Tamada
2 years ago
Reply to  Abhishek Singh

Any screenshot?

Abhishek Singh
Abhishek Singh
2 years ago
Reply to  Ravi Tamada

Screenshot wont help because snackbar not showing just because for adding behaviour. not only me many people faced this see this is my answer on stackoverflow https://stackoverflow.com/a/44778453/7130121 people facing snackar issue thats why i came here to see implementation but your implementation is silimar. Do u have any idea what to do?

Ravi Tamada
2 years ago
Reply to  Abhishek Singh

No Abhishek. I need a bit of research.

Besart Mahmuti
Besart Mahmuti
2 years ago
Reply to  Ravi Tamada

Help please!

Besart Mahmuti
Besart Mahmuti
2 years ago
Reply to  Abhishek Singh

I have the same problem , any respond from Ravi ?

Ahmad Faiz
Ahmad Faiz
2 years ago

Hi Ravi, thank u for the good tutorial
but i have same problem like on the tutorial CardView, my result just appear 3 card view and the shape just like pic… can u help me 🙁
and the other problem is it take more time to load it, whats wrong??
comment image

Sagar Chavda
Sagar Chavda
2 years ago
Reply to  Ahmad Faiz

Please once check that store_item_row.xml root layout height must be a wrap_content.

Ahmad Faiz
Ahmad Faiz
2 years ago
Reply to  Sagar Chavda

oh, great… thanks… solved

Sagar Chavda
Sagar Chavda
2 years ago

Hi :disqus , I’ve two question related to BottomNavigation and i expecting help from you.
1. Here when we switch from Shop to Gift again click on Shop it’s go to fetch data again so, how can we avoid this and display first time loaded data?
2. Here on Backpress backstack working fine but selected menu not changing according backstack?

Sagar Chavda
Sagar Chavda
2 years ago
Reply to  Sagar Chavda

:disqus can you please help me with above mentioned point ?

Ravi Tamada
2 years ago
Reply to  Sagar Chavda

(This commend doesn’t appeared on my moderation panel, don’t know why)

1. Here when we switch from Shop to Gift again click on Shop it’s go to fetch data again so, how can we avoid this and display first time loaded data?
You can store the data in local storage like MySQL or Realm and show it directly. You can keep an interval like 5mins to fetch the new data.

2. Here on Backpress backstack working fine but selected menu not changing according backstack?
This has to done automatically by the navigation widget itself, unfortunately it is not. Try the code provided in the below discussion.
https://stackoverflow.com/questions/44362819/on-back-press-traversing-through-last-two-tabs-not-working-properly-in-bottomnav?noredirect=1&lq=1

3. If user Go Shop >> Gift >> Cart >> Gift so, now here how i can manage backstack enter duplication for e.g. remove old Gift backstack entry and in new position
Answer of 2nd question should solve this issue by doing the changes in the logic.

Akhil Mankala
Akhil Mankala
2 years ago

Hi, i have a question. How to disable the animation when there are 5 items in the bottom navigation bar. I just want the icons to be static.

Akhil Mankala
Akhil Mankala
2 years ago
Reply to  Ravi Tamada

Thank you

Maciej Frankowski
Maciej Frankowski
2 years ago

Implemented, works great, thank U! 🙂 .

Ravi Tamada
2 years ago

cool!

mang pali
mang pali
2 years ago

Hi @Ravi Tamada:disqus thanks to the tutorial.
I have a question how to handle on rotation ? fragment changes if I rotate the emulator.

Ravi Tamada
2 years ago
Reply to  mang pali

Hi

Please go through this article to handle orientation http://code.hootsuite.com/orientation-changes-on-android/

Michael Sandros
Michael Sandros
2 years ago

Happy New Year to all.
:disqus is there a problem with xml files? I can not find the dimen folder and i have some problems
The compiler has problem to find the calls to dimen, for example “@dimen/card_album_radius”.

Am I mssing something?

Ravi Tamada
2 years ago

You need to create dimen.xml under res -> values folder. Can you paste the screenshot of the app when the toolbar is disappeared?

Michael Sandros
Michael Sandros
2 years ago
Reply to  Ravi Tamada

Good morning from Greece,
yes i knew that, but the point was not to put my own values. That because the graphics could be “ugly”.

The source code is the same as the tutorial. The only difference is in the MainActivity where i declare the toolbar as variable Toolbar not action bar.

Here are some screenshots:
comment image comment image comment image comment image comment image

Ravi Tamada
2 years ago

Can you try using AppBar instead of just the Toolbar as provided in the article?

Michael Sandros
Michael Sandros
2 years ago
Reply to  Ravi Tamada

Hello again.

After some magic tricks i have found the problem. the android:background color change deletes for some reason the toolbar 🙂

Ravi Tamada
2 years ago

Great.

sonali kale
sonali kale
2 years ago

Hello sir I want to use BottomNavigation on Tablet in landscape mode. can i use more than six destinations ?
please ans me.

Rajat Das
Rajat Das
2 years ago

Hey I’m very happy because I found your blogs. Thanks for doing this great work for us… I have a Request to you that could you please make a complete series on how to make Android music player. Again thanks ☺️

Ravi Tamada
2 years ago
Reply to  Rajat Das

Hi Rajat

Try modifying and fixing the bugs in the current article. As not many people are asking for an update, I am giving it less priority.

mohamad
mohamad
2 years ago

Hi Ravi
Thank you and Marry Christmas
could you please make tutorial for working with map, like uber Application and its functionality
Thank you so much and Marry Christmas again 😀

Ravi Tamada
2 years ago
Reply to  mohamad

Thanks Mohamad. I wish you the same.

I am working customizing maps. It will be published after couple of articles.

Michael Sandros
Michael Sandros
2 years ago

:disqus
happy new year,
you could add the swipe left and right implementations for better app experience

Ravi Tamada
2 years ago

Happy New Year Michael 😀

The swipe experience shouldn’t used with Bottom Navigation as per google design specs.
https://material.io/guidelines/components/bottom-navigation.html#bottom-navigation-behavior (search for ‘scrolling’)

លាវ ពន្លក
លាវ ពន្លក
2 years ago

very very thank you I like this article

Ravi Tamada
2 years ago

You are welcome 🙂

Arash
Arash
2 years ago

Hi , ty for this great article, i’m getting an XML error:
Binary XML file line #16: Error inflating class android.support.design.widget.BottomNavigationView
how can i fix this? please help me

Ravi Tamada
2 years ago
Reply to  Arash

Have you added the design support library in gradle?

viavitaeapps test
viavitaeapps test
2 years ago

Happy new year Ravi,,
I have confusion regarding setting the jsonArray data to the POJO.Where you actually setting ?
And how in the onBindViewHolder() we are getting the exact same data without setting first.

Please elaborate this line -> List items = new Gson().fromJson(response.toString(), new TypeToken<List>() { }.getType());

Ravi Tamada
2 years ago

Hi

This is called JSON serialization. We can avoid manually parsing JSON by using GSon library. What we do is, keep the variable name same as JSON node name. While serializing it maps the JSON value with matched variable name in POJO class. If you want use different name for the variable, we can use annotations.

Read the GSon documentation for better understating.

Happy new year !

viavitaeapps test
viavitaeapps test
2 years ago
Reply to  Ravi Tamada

you are awesome bro….
thanks for replying

Ravi Tamada
2 years ago

You are welcome 🙂

Ashis Ranjan Dey
Ashis Ranjan Dey
2 years ago

how can I change background colour of bottom bar for each fragment? should I add something to onNavigationItemSelected() method?Thanks in advance

Ivkaran Singh
Ivkaran Singh
2 years ago

Hello Ravi,

Thanks a lot for this great tutorial.

How can I have 4-6 cards of different categories on Page 1 with each having a View More button and when clicked under a specific category will take to the 2nd page which will have all the cards of the category.=?

Ravi Tamada
2 years ago
Reply to  Ivkaran Singh
Kutluhan Ozan Köse
Kutluhan Ozan Köse
2 years ago

Hi Ravi, I am trying a sliding menu (navigation drawer) and bottom navigation draver in one activity. I placed everything correctly but when I click a fragment in the bottomnavigation it throws this;

MainActivity must implement OnFragmentInteractionListener

Will you help?

Ravi Tamada
2 years ago

Seems there is an error in your layout files. Check all the layout files. You might be missing params of height and widget or other related attributes.

E Y
E Y
2 years ago

Thanks Ravi for great tutorial. How to switch between fragments with rubbed by hand?

Ravi Tamada
2 years ago
Reply to  E Y

For that you need to use ViewPager but ViewPager shouldn’t be used with Bottom Navigation as per google desc specs. ViewPager navigation should be used with Tabs.

E Y
E Y
2 years ago
Reply to  Ravi Tamada

Thanks for the information.

veer
veer
2 years ago

my fragments are not loaded … please help me..
Thank You……..

Magesh R
Magesh R
2 years ago

Hai bro, I got this error
java.lang.NullPointerException in MyApplication.getInstance().addToRequestQueue(request);
internet permission is also placed.
Please help me bro

Ravi Tamada
2 years ago
Reply to  Magesh R

MyApplication class has to be added to AndroidManifest.xml <application> tag.

Magnusef
Magnusef
2 years ago

Do you have a tutorial on how to cache the fragments, so I don’t have to load data every time I click the fragment?

Ghanshyam Tiwari
Ghanshyam Tiwari
2 years ago

thanks a lot

Ravi Tamada
2 years ago

You are welcome 🙂

Samuel Iwuchukwu
Samuel Iwuchukwu
2 years ago

Wow..this tutorial is so simple and direct..thank you Ravi..you just saved me..
@Uncle Sam

Ravi Tamada
2 years ago

You are welcome Samuel:)

Aabhas Singhal
Aabhas Singhal
2 years ago

Hi Ravi,
Thanks for the tutorial
I want to know how to stop reloading every time i click on the store fragment ?

hassan moradnezhad
hassan moradnezhad
2 years ago
Reply to  Aabhas Singhal

search about viewpager.setOffscreenPageLimit();

shiva pasunoori
shiva pasunoori
2 years ago

can i use relative layout instead o coordinator layout for hide the bottom navigation when we scroll fragment

Ravi Tamada
2 years ago

You can but no guarantee of consistent experience on all the devices.

shiva pasunoori
shiva pasunoori
2 years ago
Reply to  Ravi Tamada

k Sir , One more Sir,Please prepare a expandable recycler view tutorial

Akash Mishra
Akash Mishra
2 years ago

Can I change the first menu. I mean to say, like I add 3 menu and I want the mid one should be visible on activity launch. Is it possible?

Johannes Ramothale
Johannes Ramothale
2 years ago

Thank for the tut, I have been stuck on bottom navigation for hours now. great work

Pin Number
Pin Number
2 years ago

Did you notice java memory in android profile – it’s increasing as you click on menu items repeatedly?
Is it a memory leak . I think it is bug in bottom navigation itself. Try without fragments just simple navigation piece with simple switch statement. Java memory increases but will not come down after waiting for long period.

Aleesa Javid
Aleesa Javid
2 years ago

Hi
I have a question??
In bottom navigation fragment i have one view.on click of view open a next activity..in next activity on click of back button open previous fragment but not show navigation bar…how i can resolvce this…

Mitesh Makwana
Mitesh Makwana
2 years ago

Hi Ravi,
how to stop bottom navigation animation ,
my requirement is display bottom icon without any animation on click event

Mitesh Makwana
Mitesh Makwana
2 years ago
Reply to  Mitesh Makwana

i solve this problem after adding BottomNavigationViewHelper class it work fine

thanks for this awesome tutorial

Ravi Tamada
2 years ago
Reply to  Mitesh Makwana

Sharing BottomNavigationViewHelper code may helps others.

Thanks Mitesh.

Mitesh Makwana
Mitesh Makwana
2 years ago
Reply to  Ravi Tamada

import android.support.design.internal.BottomNavigationItemView;
import android.support.design.internal.BottomNavigationMenuView;
import android.support.design.widget.BottomNavigationView;
import android.util.Log;
import java.lang.reflect.Field;

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);
}
}
}

add this in your java file
BottomNavigationViewHelper.disableShiftMode(navigation);

OmkarK
OmkarK
2 years ago
Reply to  Mitesh Makwana

thank you..! @Mitesh makwana

Mitesh Makwana
Mitesh Makwana
2 years ago
Reply to  OmkarK

welcome

Malik Mahmoud
Malik Mahmoud
2 years ago

you can do a tutorial if you click on the RecyclerView to open a new activity (details)

Malik Mahmoud
Malik Mahmoud
2 years ago
Reply to  Malik Mahmoud

please Ravi

erick jayson deguzman
erick jayson deguzman
2 years ago

hi sir :disqus , how to go to next activity when i click gifts , Tnx

nathan
nathan
2 years ago

hi :disqus just wondering what version of android studio you are using because i am getting a few errors early on, null pointers etc.

nathan
nathan
2 years ago
Reply to  nathan

the main error that i get is java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.support.v7.app.ActionBar.setTitle(java.lang.CharSequence)’ on a null object reference

any ideas?

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  nathan

maybe MyApplication not added to AndroidManifest.xml? i think so

Ravi Tamada
2 years ago

Try removing https from the url and try with http. If the server ssl certificate is poor, you will see this error.

If you are using Retrofit, try adding SSL Ciphers from the featured comment below this article.
https://www.androidhive.info/2016/05/android-working-with-retrofit-http-library/#disqus_thread

Try in other devices as well. But in production app, the server should have good SSL certificate installed.

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  Ravi Tamada

okay, problem solved and program running. Thank you Ravi 🙂

Ravi Tamada
2 years ago
Reply to  sidiq zaenal

Great!

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  Ravi Tamada

oh ya, untuk click item in recyclerview itu bagaimana cara mengimplementasikannya? terimakasih untuk jawabannya Ravi 🙂

karishma kumari
karishma kumari
2 years ago

hi Ravi,
can we select a fragment without clicking on the navigation botton ? Is it possible ? I mean automatically to select position of navigationButton ?

Henrique Resende
Henrique Resende
2 years ago

comment image When i write in CASE fragment = new InicioFragment();
loadFragment(fragment);

The android studio tell me that “fragment = new InicioFragment();” have a error that says “Incompatible types: Required : android.support.v4.app.Fragment / Found : com.example.henrique.tecardapk.InicioFragment”

What i do?

sidiq zaenal
sidiq zaenal
2 years ago

In CodigoFragment replace import android.app.Fragment; become import android.support.v4.app.Fragment;

Malik Mahmoud
Malik Mahmoud
2 years ago

hi :disqus you can do a tutorial if you click on the RecyclerView to open a new activity (details) ?

Azmi
Azmi
2 years ago

Hi :disqus, it’s very nice tutorial! Anyway i have a little problem:

When i try to use Retrofit, i cannot access your link and when i go to the log, it says that the response code is 405, which means that my apps is not allowed to access your json code. Can you please help me?

Thanks

Azmi
Azmi
2 years ago
Reply to  Azmi

i am just resolving this issue by following the answer from @sidiqzaenal:disqus question. My apologize 😉

sidiq zaenal
sidiq zaenal
2 years ago

Hi Ravi,

I want to ask again 🙂 I want to change the size of the recyclerview item that is drawn below, right it every 1 line there are three items. Well I want to turn it into 2 items per line that how I’ve tried to change but it always fails. Thank you for Answare.comment image

Ravi Tamada
2 years ago
Reply to  sidiq zaenal

In your main activity change the number from 3 to 2 in the below line.
RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 3);

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  Ravi Tamada

oh yes, worked. Thanks you Ravi:)

Ravi Tamada
2 years ago
Reply to  sidiq zaenal

Great 🙂

Besart Mahmuti
Besart Mahmuti
2 years ago
Reply to  sidiq zaenal

plz can u tell me the code of your API @sidiqzaenal:disqus i see that u have build your own database ,
and im trying to fetch my data from database but im doing something wrong and i think is the API

Besart Mahmuti
Besart Mahmuti
2 years ago

:disqus can u tell me the code of the API

Ravi Tamada
2 years ago
Reply to  Besart Mahmuti

It’s just static JSON wrote manually in notepad. You can follow the below article to lean writing proper REST API
https://www.androidhive.info/2014/01/how-to-create-rest-api-for-android-app-using-php-slim-and-mysql-day-12-2/

Besart Mahmuti
Besart Mahmuti
2 years ago
Reply to  Ravi Tamada

Okay, thank you

Dino sunny
Dino sunny
2 years ago

Hi, How remove bottom navigation jumping animation? Bottom icons

Độ
Độ
2 years ago

How to avoid reloading fragment when I click a tab again? @Ravi Tamada

sidiq zaenal
sidiq zaenal
2 years ago

Hi :disqus,
I am still confused how to send fragment image to fragment, for example as the picture on thumbnail recyclerview is sent to DetailFragment. Can it be helped? maybe the picture like the picture below, I hope can be assisted by Ravi Tamada

comment image

Ravi Tamada
2 years ago
Reply to  sidiq zaenal

Paste the code you used to launch the detailed activity or fragment.

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  Ravi Tamada

holder.card.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

sendname = holder.name.getText().toString();
//is this like it or not? if you have a text that way just cuman image can not sendimage = holder.thumbnail.getContext().toString();
sendprice = holder.price.getText().toString();

FragmentTransaction fragmentTransaction=getFragmentManager().beginTransaction();
DetailBarangFragment detailBarangFragment= new DetailBarangFragment();

Bundle bundle = new Bundle();
bundle.putString(“name”, sendname);
//how to pass image in fragment to fragment ???????????????? bundle.putString(“thumbnail”, sendimage)
bundle.putString(“price”, sendprice);
detailBarangFragment.setArguments(bundle); //send data
fragmentTransaction.replace(R.id.frame_container, detailBarangFragment);
fragmentTransaction.isAddToBackStackAllowed();
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
//Toast.makeText(getActivity(), movie.getTitle(), Toast.LENGTH_SHORT).show();
}
});

Ravi Tamada
2 years ago
Reply to  sidiq zaenal

I am guessing you are displaying images from an Url. If yes, just pass the image url as String. On the detailed fragment, get the image url from the bundle arguments and display the image using Glide or Picasa.

sidiq zaenal
sidiq zaenal
2 years ago
Reply to  Ravi Tamada

So what source code Ravi? helpme:)

Леня Захаров
Леня Захаров
2 years ago

comment image Hi :disqus ,
I have an issue. All the images are loading, but all text is no. But, if i change holder.name.setText(movie.getTitle()); -> holder.name.setText(“Some Text”);
It’s working. Helm me please))
P.S. Sorry for grammar, i’am Russian 😉

Ravi Tamada
2 years ago

Check the JSON node and variable name in Movie class. They should match or use @SerializedName annotation.

Леня Захаров
Леня Захаров
2 years ago
Reply to  Ravi Tamada

Yeah, thanks, Its work

Ravi Tamada
2 years ago

Cool

Леня Захаров
Леня Захаров
2 years ago

Hi again @Ravi Tamada, And now I have a problem with hiding navBar . App is Just crash when I stat it. Debuger says that this happens when onCreate() in Bottom… Behavior

Леня Захаров
Леня Захаров
2 years ago

Hi again :disqus , And now I have a problem with hiding navBar . App is Just crash when I stat it. I think problem in param navigation.getLayoutParams()

Ravi Tamada
2 years ago

Can you post any error report?

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