Adding Items To Navigation Drawer

To add items to navigation drawer, you need to edit two files. MainActivity.java and activity_main_drawer.xml

Adding Category to menu

Go to activity_main_drawer.xml and find the code mentioned below

activity_main_drawer.xml

    <group>
        <item
            android:id="@+id/nav_home"

            android:icon="@drawable/ic_home"
            android:title="Home" />
        <item
            android:id="@+id/nav_categories"
            android:icon="@drawable/ic_categories"
            android:title="Categories" />
        <item
            android:id="@+id/nav_offline"
            android:icon="@drawable/ic_file_download"
            android:title="Saved Posts"/>
    </group>

and paste the below code inside the <group> ... </group>

activity_main_drawer.xml

<item
            android:id="@+id/nav_my_category_id"
            android:icon="@drawable/ic_add"

            android:title="My Category Name"/>

Make sure you replace the nav_my_category_id (we will use this later) with a unique navigation id(No space in between the name) usually the category name will work. Also replace the @drawable/ic_add with your icon and My Category Name with your category name.

Now the first part is completed. Lets proceed to the second step.

Go to MainActivity.java file and find the code mentioned below

MainActivity.java

@Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.nav_home){
            viewPager.setCurrentItem(0,true);
            bottomNavigation.setCurrentItem(0);
        }else if (id == R.id.nav_categories){
            viewPager.setCurrentItem(1,true);
            bottomNavigation.setCurrentItem(1);
        }else if(id==R.id.nav_offline){
            startActivity(new Intent(getApplicationContext(),OfflinePosts.class));
        }else if (id==R.id.nav_fb){
            openFbUrl("Google");
        }else if (id==R.id.nav_insta){
            openInstagram("Google");
        }else if (id==R.id.nav_tw){
            openTwitterUrl("Google");
        }else if (id==R.id.nav_yt){
            openYoutubeUrl("https://www.youtube.com/channel/UCNhT2txZHDfeIS0g7ZK7uRg");
        }else if (id==R.id.nav_web_url){
            openWebView("https://codecanyon.net/item/wordroid-full-wordpress-blog-app/19753667");
        }if (id == R.id.nav_about){
            openWebView("http://dev.itsanubhav.com/about-us/");
        }else if(id == R.id.nav_privacy){
            openWebView("http://dev.itsanubhav.com/privacy-policy/");
        }
        editor.apply();

        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

You need to add following file to the onNavigationItemSelected just before the editor.apply();

MainActivity.java

else if (id == R.id.nav_my_category_id){
     openCategory("Category Name",121);
}

Make sure you change the nav_my_category_id to the id you added in the activity_main_drawer.xml. Change the Category Name with your category name and 121 with your category id.

Full Code Example

MainActivity.java

@Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.nav_home){
            viewPager.setCurrentItem(0,true);
            bottomNavigation.setCurrentItem(0);
        }else if (id == R.id.nav_categories){
            viewPager.setCurrentItem(1,true);
            bottomNavigation.setCurrentItem(1);
        }else if(id==R.id.nav_offline){
            startActivity(new Intent(getApplicationContext(),OfflinePosts.class));
        }else if (id==R.id.nav_fb){
            openFbUrl("Google");
        }else if (id==R.id.nav_insta){
            openInstagram("Google");
        }else if (id==R.id.nav_tw){
            openTwitterUrl("Google");
        }else if (id==R.id.nav_yt){
            openYoutubeUrl("https://www.youtube.com/channel/UCNhT2txZHDfeIS0g7ZK7uRg");
        }else if (id==R.id.nav_web_url){
            openWebView("https://codecanyon.net/item/wordroid-full-wordpress-blog-app/19753667");
        }if (id == R.id.nav_about){
            openWebView("http://dev.itsanubhav.com/about-us/");
        }else if(id == R.id.nav_privacy){
            openWebView("http://dev.itsanubhav.com/privacy-policy/");
        }else if (id == R.id.nav_my_category_id){
            openCategory("Category Name",121);
        }
        editor.apply();

        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

Adding Social Media Links