Initial Commit

app/src/main/java/com/example/myapplication/MainActivity.kt

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+package com.example.myapplication
+
+import android.os.Bundle
+import com.google.android.material.bottomnavigation.BottomNavigationView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.findNavController
+import androidx.navigation.ui.AppBarConfiguration
+import androidx.navigation.ui.setupActionBarWithNavController
+import androidx.navigation.ui.setupWithNavController
+import com.example.myapplication.databinding.ActivityMainBinding
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityMainBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        val navView: BottomNavigationView = binding.navView
+
+        val navController = findNavController(R.id.nav_host_fragment_activity_main)
+        // Passing each menu ID as a set of Ids because each
+        // menu should be considered as top level destinations.
+        val appBarConfiguration = AppBarConfiguration(setOf(
+                R.id.navigation_home, R.id.navigation_dashboard, R.id.navigation_notifications))
+        setupActionBarWithNavController(navController, appBarConfiguration)
+        navView.setupWithNavController(navController)
+    }
+}

app/src/main/java/com/example/myapplication/ui/dashboard/DashboardFragment.kt

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+package com.example.myapplication.ui.dashboard
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.example.myapplication.databinding.FragmentDashboardBinding
+
+class DashboardFragment : Fragment() {
+
+    private var _binding: FragmentDashboardBinding? = null
+
+    // This property is only valid between onCreateView and
+    // onDestroyView.
+    private val binding get() = _binding!!
+
+    override fun onCreateView(
+            inflater: LayoutInflater,
+            container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View {
+        val dashboardViewModel =
+                ViewModelProvider(this).get(DashboardViewModel::class.java)
+
+        _binding = FragmentDashboardBinding.inflate(inflater, container, false)
+        val root: View = binding.root
+
+        val textView: TextView = binding.textDashboard
+        dashboardViewModel.text.observe(viewLifecycleOwner) {
+            textView.text = it
+        }
+        return root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

app/src/main/java/com/example/myapplication/ui/dashboard/DashboardViewModel.kt

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+package com.example.myapplication.ui.dashboard
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class DashboardViewModel : ViewModel() {
+
+    private val _text = MutableLiveData<String>().apply {
+        value = "This is dashboard Fragment"
+    }
+    val text: LiveData<String> = _text
+}

app/src/main/java/com/example/myapplication/ui/home/HomeFragment.kt

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+package com.example.myapplication.ui.home
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.example.myapplication.databinding.FragmentHomeBinding
+
+class HomeFragment : Fragment() {
+
+    private var _binding: FragmentHomeBinding? = null
+
+    // This property is only valid between onCreateView and
+    // onDestroyView.
+    private val binding get() = _binding!!
+
+    override fun onCreateView(
+            inflater: LayoutInflater,
+            container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View {
+        val homeViewModel =
+                ViewModelProvider(this).get(HomeViewModel::class.java)
+
+        _binding = FragmentHomeBinding.inflate(inflater, container, false)
+        val root: View = binding.root
+
+        val textView: TextView = binding.textHome
+        homeViewModel.text.observe(viewLifecycleOwner) {
+            textView.text = it
+        }
+        return root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

app/src/main/java/com/example/myapplication/ui/home/HomeViewModel.kt

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+package com.example.myapplication.ui.home
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class HomeViewModel : ViewModel() {
+
+    private val _text = MutableLiveData<String>().apply {
+        value = "This is home Fragment"
+    }
+    val text: LiveData<String> = _text
+}

app/src/main/java/com/example/myapplication/ui/notifications/NotificationsFragment.kt

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+package com.example.myapplication.ui.notifications
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import com.example.myapplication.databinding.FragmentNotificationsBinding
+
+class NotificationsFragment : Fragment() {
+
+    private var _binding: FragmentNotificationsBinding? = null
+
+    // This property is only valid between onCreateView and
+    // onDestroyView.
+    private val binding get() = _binding!!
+
+    override fun onCreateView(
+            inflater: LayoutInflater,
+            container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View {
+        val notificationsViewModel =
+                ViewModelProvider(this).get(NotificationsViewModel::class.java)
+
+        _binding = FragmentNotificationsBinding.inflate(inflater, container, false)
+        val root: View = binding.root
+
+        val textView: TextView = binding.textNotifications
+        notificationsViewModel.text.observe(viewLifecycleOwner) {
+            textView.text = it
+        }
+        return root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }
+}

app/src/main/java/com/example/myapplication/ui/notifications/NotificationsViewModel.kt

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+package com.example.myapplication.ui.notifications
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class NotificationsViewModel : ViewModel() {
+
+    private val _text = MutableLiveData<String>().apply {
+        value = "This is notifications Fragment"
+    }
+    val text: LiveData<String> = _text
+}