Implement viewBindings

2025-12-06 07:29:10 +00:00 · 2020-12-16 21:20:36 +01:00
parent 7c338acf81
commit ce94cfb566
12 changed files with 158 additions and 101 deletions
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -1,7 +1,6 @@
 plugins {
    id("com.android.application")
    id("kotlin-android")
-    id("kotlin-android-extensions")
    id("kotlin-kapt")
    id("com.google.gms.google-services")
    id("com.mikepenz.aboutlibraries.plugin")
@@ -38,8 +37,8 @@ android {
    kotlinOptions {
        jvmTarget = "1.8"
    }
-    androidExtensions {
-        isExperimental = true
+    buildFeatures {
+        viewBinding = true
    }
 }

--- a/app/src/main/java/net/underdesk/circolapp/MainActivity.kt
+++ b/app/src/main/java/net/underdesk/circolapp/MainActivity.kt
@@ -38,8 +38,8 @@ import androidx.preference.PreferenceManager
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import com.google.android.material.snackbar.Snackbar
 import com.mikepenz.aboutlibraries.LibsBuilder
-import kotlinx.android.synthetic.main.activity_main.*
 import net.underdesk.circolapp.adapters.CircularLetterAdapter
+import net.underdesk.circolapp.databinding.ActivityMainBinding
 import net.underdesk.circolapp.utils.DownloadableFile
 import net.underdesk.circolapp.works.PollWork

@@ -49,6 +49,8 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
        internal const val PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 10
    }

+    private lateinit var binding: ActivityMainBinding
+
    var searchCallback: SearchCallback? = null
    var refreshCallback: RefreshCallback? = null
    override var fileToDownload: DownloadableFile? = null
@@ -56,8 +58,9 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
    override fun onCreate(savedInstanceState: Bundle?) {
        loadDarkTheme()
        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
-        setSupportActionBar(main_toolbar)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        setSupportActionBar(binding.mainToolbar)
        val navView: BottomNavigationView = findViewById(R.id.nav_view)

        val navController = findNavController(R.id.nav_host_fragment)
@@ -134,7 +137,7 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
                    downloadFile()
                } else {
                    Snackbar.make(
-                        container,
+                        binding.container,
                        resources.getString(R.string.snackbar_write_permission_not_granted),
                        Snackbar.LENGTH_LONG
                    ).show()
@@ -161,7 +164,7 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
        (getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager).enqueue(request)

        Snackbar.make(
-            container,
+            binding.container,
            resources.getString(R.string.snackbar_circular_downloaded),
            Snackbar.LENGTH_LONG
        ).show()
--- a/app/src/main/java/net/underdesk/circolapp/SettingsActivity.kt
+++ b/app/src/main/java/net/underdesk/circolapp/SettingsActivity.kt
@@ -24,7 +24,7 @@ import android.text.InputType
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.preference.*
-import kotlinx.android.synthetic.main.settings_activity.*
+import net.underdesk.circolapp.databinding.SettingsActivityBinding
 import net.underdesk.circolapp.push.FirebaseTopicUtils
 import net.underdesk.circolapp.server.AndroidServerApi
 import net.underdesk.circolapp.shared.server.ServerAPI
@@ -32,10 +32,14 @@ import net.underdesk.circolapp.works.PollWork

 class SettingsActivity : AppCompatActivity() {

+    private lateinit var binding: SettingsActivityBinding
+
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.settings_activity)
-        setSupportActionBar(settings_toolbar)
+        binding = SettingsActivityBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        setSupportActionBar(binding.settingsToolbar)
        supportFragmentManager
            .beginTransaction()
            .replace(R.id.settings, SettingsFragment())
--- a/app/src/main/java/net/underdesk/circolapp/adapters/AttachmentAdapter.kt
+++ b/app/src/main/java/net/underdesk/circolapp/adapters/AttachmentAdapter.kt
@@ -20,13 +20,11 @@ package net.underdesk.circolapp.adapters

 import android.content.Context
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageButton
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
-import kotlinx.android.synthetic.main.item_attachment.view.*
-import net.underdesk.circolapp.R
+import net.underdesk.circolapp.databinding.ItemAttachmentBinding
 import net.underdesk.circolapp.utils.DownloadableFile
 import net.underdesk.circolapp.utils.FileUtils

@@ -38,18 +36,17 @@ class AttachmentAdapter(
    RecyclerView.Adapter<AttachmentAdapter.AttachmentViewHolder>() {
    private lateinit var context: Context

-    inner class AttachmentViewHolder(view: View) : RecyclerView.ViewHolder(view) {
-        var title: TextView = view.attachment_title_textview
-        var viewButton: ImageButton = view.attachment_view_button
-        var downloadButton: ImageButton = view.attachment_download_button
+    inner class AttachmentViewHolder(binding: ItemAttachmentBinding) : RecyclerView.ViewHolder(binding.root) {
+        var title: TextView = binding.attachmentTitleTextview
+        var viewButton: ImageButton = binding.attachmentViewButton
+        var downloadButton: ImageButton = binding.attachmentDownloadButton
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AttachmentViewHolder {
-        val itemView = LayoutInflater.from(parent.context)
-            .inflate(R.layout.item_attachment, parent, false)
+        val binding = ItemAttachmentBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        context = parent.context

-        return AttachmentViewHolder(itemView)
+        return AttachmentViewHolder(binding)
    }

    override fun onBindViewHolder(holder: AttachmentViewHolder, position: Int) {
--- a/app/src/main/java/net/underdesk/circolapp/adapters/CircularLetterAdapter.kt
+++ b/app/src/main/java/net/underdesk/circolapp/adapters/CircularLetterAdapter.kt
@@ -31,12 +31,12 @@ import androidx.core.content.ContextCompat.getDrawable
 import androidx.fragment.app.FragmentActivity
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import kotlinx.android.synthetic.main.item_circular.view.*
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.launch
 import net.underdesk.circolapp.AlarmBroadcastReceiver
 import net.underdesk.circolapp.R
 import net.underdesk.circolapp.data.AndroidDatabase
+import net.underdesk.circolapp.databinding.ItemCircularBinding
 import net.underdesk.circolapp.fragments.NewReminderFragment
 import net.underdesk.circolapp.shared.data.Circular
 import net.underdesk.circolapp.utils.DownloadableFile
@@ -55,17 +55,17 @@ class CircularLetterAdapter(
        setHasStableIds(true)
    }

-    inner class CircularLetterViewHolder(view: View) : RecyclerView.ViewHolder(view) {
-        var card: CardView = view.circular_card
-        var title: TextView = view.circular_title_textview
-        var number: TextView = view.circular_number_textview
-        var date: TextView = view.circular_date_textview
-        var collapseButton: ImageButton = view.circular_collapse_button
-        var viewButton: ImageButton = view.circular_view_button
-        var downloadButton: ImageButton = view.circular_download_button
-        var favouriteButton: ImageButton = view.circular_favourite_button
-        var reminderButton: ImageButton = view.circular_reminder_button
-        var attachmentsList: RecyclerView = view.circulars_attachments_list
+    inner class CircularLetterViewHolder(binding: ItemCircularBinding) : RecyclerView.ViewHolder(binding.root) {
+        var card: CardView = binding.circularCard
+        var title: TextView = binding.circularTitleTextview
+        var number: TextView = binding.circularNumberTextview
+        var date: TextView = binding.circularDateTextview
+        var collapseButton: ImageButton = binding.circularCollapseButton
+        var viewButton: ImageButton = binding.circularViewButton
+        var downloadButton: ImageButton = binding.circularDownloadButton
+        var favouriteButton: ImageButton = binding.circularFavouriteButton
+        var reminderButton: ImageButton = binding.circularReminderButton
+        var attachmentsList: RecyclerView = binding.circularsAttachmentsList

        init {
            attachmentsList.layoutManager = LinearLayoutManager(context)
@@ -73,11 +73,10 @@ class CircularLetterAdapter(
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CircularLetterViewHolder {
-        val itemView = LayoutInflater.from(parent.context)
-            .inflate(R.layout.item_circular, parent, false)
+        val binding = ItemCircularBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        context = parent.context

-        return CircularLetterViewHolder(itemView)
+        return CircularLetterViewHolder(binding)
    }

    override fun onBindViewHolder(holder: CircularLetterViewHolder, position: Int) {
--- a/app/src/main/java/net/underdesk/circolapp/fragments/CircularLetterFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/CircularLetterFragment.kt
@@ -28,12 +28,11 @@ import androidx.fragment.app.viewModels
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.google.android.material.snackbar.Snackbar
-import kotlinx.android.synthetic.main.fragment_circular_letters.*
-import kotlinx.android.synthetic.main.fragment_circular_letters.view.*
 import net.underdesk.circolapp.MainActivity
 import net.underdesk.circolapp.R
 import net.underdesk.circolapp.adapters.CircularLetterAdapter
 import net.underdesk.circolapp.data.AndroidCircularRepository
+import net.underdesk.circolapp.databinding.FragmentCircularLettersBinding
 import net.underdesk.circolapp.viewmodels.CircularLetterViewModel
 import net.underdesk.circolapp.viewmodels.CircularLetterViewModelFactory

@@ -42,6 +41,10 @@ class CircularLetterFragment :
    MainActivity.SearchCallback,
    MainActivity.RefreshCallback {

+    private var _binding: FragmentCircularLettersBinding? = null
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
    private val circularLetterViewModel: CircularLetterViewModel by viewModels {
        CircularLetterViewModelFactory(
            AndroidCircularRepository.getInstance(requireContext()),
@@ -53,19 +56,19 @@ class CircularLetterFragment :
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
-    ): View? {
-        val root = inflater.inflate(R.layout.fragment_circular_letters, container, false)
+    ): View {
+        _binding = FragmentCircularLettersBinding.inflate(inflater, container, false)

-        root.circulars_list.layoutManager = LinearLayoutManager(context)
+        binding.circularsList.layoutManager = LinearLayoutManager(context)

        circularLetterViewModel.circulars.observe(
            viewLifecycleOwner,
            {
-                if (root.circulars_list.adapter == null) {
-                    root.circulars_list.adapter =
+                if (binding.circularsList.adapter == null) {
+                    binding.circularsList.adapter =
                        CircularLetterAdapter(it, activity as MainActivity, lifecycleScope)
                } else {
-                    (root.circulars_list.adapter as CircularLetterAdapter).changeDataSet(it)
+                    (binding.circularsList.adapter as CircularLetterAdapter).changeDataSet(it)
                }
            }
        )
@@ -87,18 +90,23 @@ class CircularLetterFragment :
            viewLifecycleOwner,
            {
                if (it) {
-                    root.circulars_refresh.isRefreshing = false
+                    binding.circularsRefresh.isRefreshing = false

                    circularLetterViewModel.showMessage.postValue(false)
                }
            }
        )

-        root.circulars_refresh.setOnRefreshListener { circularLetterViewModel.updateCirculars() }
+        binding.circularsRefresh.setOnRefreshListener { circularLetterViewModel.updateCirculars() }

        (activity as MainActivity).searchCallback = this
        (activity as MainActivity).refreshCallback = this
-        return root
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
    }

    override fun search(query: String) {
@@ -106,7 +114,7 @@ class CircularLetterFragment :
    }

    override fun refresh() {
-        circulars_refresh.isRefreshing = true
+        binding.circularsRefresh.isRefreshing = true
        circularLetterViewModel.updateCirculars()
    }
 }
--- a/app/src/main/java/net/underdesk/circolapp/fragments/FavouritesFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/FavouritesFragment.kt
@@ -26,16 +26,19 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
-import kotlinx.android.synthetic.main.fragment_circular_letters.view.*
 import net.underdesk.circolapp.MainActivity
-import net.underdesk.circolapp.R
 import net.underdesk.circolapp.adapters.CircularLetterAdapter
 import net.underdesk.circolapp.data.AndroidCircularRepository
+import net.underdesk.circolapp.databinding.FragmentCircularLettersBinding
 import net.underdesk.circolapp.viewmodels.FavouritesViewModel
 import net.underdesk.circolapp.viewmodels.FavouritesViewModelFactory

 class FavouritesFragment : Fragment(), MainActivity.SearchCallback {

+    private var _binding: FragmentCircularLettersBinding? = null
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
    private val favouritesViewModel: FavouritesViewModel by viewModels {
        FavouritesViewModelFactory(
            AndroidCircularRepository.getInstance(requireContext()),
@@ -47,27 +50,32 @@ class FavouritesFragment : Fragment(), MainActivity.SearchCallback {
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
-    ): View? {
-        val root = inflater.inflate(R.layout.fragment_circular_letters, container, false)
+    ): View {
+        _binding = FragmentCircularLettersBinding.inflate(inflater, container, false)

-        root.circulars_list.layoutManager = LinearLayoutManager(context)
-        root.circulars_refresh.isEnabled = false
+        binding.circularsList.layoutManager = LinearLayoutManager(context)
+        binding.circularsRefresh.isEnabled = false

        favouritesViewModel.circulars.observe(
            viewLifecycleOwner,
            {
-                if (root.circulars_list.adapter == null) {
-                    root.circulars_list.adapter =
+                if (binding.circularsList.adapter == null) {
+                    binding.circularsList.adapter =
                        CircularLetterAdapter(it, activity as MainActivity, lifecycleScope)
                } else {
-                    (root.circulars_list.adapter as CircularLetterAdapter).changeDataSet(it)
+                    (binding.circularsList.adapter as CircularLetterAdapter).changeDataSet(it)
                }
            }
        )

        (activity as MainActivity).searchCallback = this
        (activity as MainActivity).refreshCallback = null
-        return root
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
    }

    override fun search(query: String) {
--- a/app/src/main/java/net/underdesk/circolapp/fragments/NewReminderFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/NewReminderFragment.kt
@@ -30,11 +30,11 @@ import android.view.ViewGroup
 import androidx.core.app.AlarmManagerCompat
 import androidx.fragment.app.DialogFragment
 import androidx.lifecycle.lifecycleScope
-import kotlinx.android.synthetic.main.dialog_reminder.*
 import kotlinx.coroutines.launch
 import net.underdesk.circolapp.AlarmBroadcastReceiver
 import net.underdesk.circolapp.R
 import net.underdesk.circolapp.data.AndroidDatabase
+import net.underdesk.circolapp.databinding.DialogReminderBinding
 import net.underdesk.circolapp.shared.data.Circular
 import java.util.*

@@ -48,6 +48,10 @@ class NewReminderFragment : DialogFragment() {
        }
    }

+    private var _binding: DialogReminderBinding? = null
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
    private var dateNotChosen = true
    lateinit var circular: Circular

@@ -56,44 +60,50 @@ class NewReminderFragment : DialogFragment() {
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
-        return inflater.inflate(R.layout.dialog_reminder, container)
+        _binding = DialogReminderBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

-        dialog_time_picker.setIs24HourView(true)
+        binding.dialogTimePicker.setIs24HourView(true)

-        dialog_ok_button.setOnClickListener { next() }
-        dialog_back_button.setOnClickListener { back() }
-        dialog_cancel_button.setOnClickListener { dismiss() }
+        binding.dialogOkButton.setOnClickListener { next() }
+        binding.dialogBackButton.setOnClickListener { back() }
+        binding.dialogCancelButton.setOnClickListener { dismiss() }
    }

    fun next() {
        if (dateNotChosen) {
-            dialog_date_picker.visibility = View.GONE
-            dialog_time_picker.visibility = View.VISIBLE
-            dialog_back_button.visibility = View.VISIBLE
-            dialog_ok_button.text = getString(R.string.dialog_ok)
+            binding.dialogDatePicker.visibility = View.GONE
+            binding.dialogTimePicker.visibility = View.VISIBLE
+            binding.dialogBackButton.visibility = View.VISIBLE
+            binding.dialogOkButton.text = getString(R.string.dialog_ok)
            dateNotChosen = false
        } else {
            val calendar = Calendar.getInstance()
            val hour = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-                dialog_time_picker.hour
+                binding.dialogTimePicker.hour
            } else {
-                dialog_time_picker.currentHour
+                binding.dialogTimePicker.currentHour
            }

            val minute = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-                dialog_time_picker.minute
+                binding.dialogTimePicker.minute
            } else {
-                dialog_time_picker.currentMinute
+                binding.dialogTimePicker.currentMinute
            }

            calendar.set(
-                dialog_date_picker.year,
-                dialog_date_picker.month,
-                dialog_date_picker.dayOfMonth,
+                binding.dialogDatePicker.year,
+                binding.dialogDatePicker.month,
+                binding.dialogDatePicker.dayOfMonth,
                hour,
                minute
            )
@@ -127,10 +137,10 @@ class NewReminderFragment : DialogFragment() {
    }

    private fun back() {
-        dialog_date_picker.visibility = View.VISIBLE
-        dialog_time_picker.visibility = View.GONE
-        dialog_back_button.visibility = View.GONE
-        dialog_ok_button.text = getString(R.string.dialog_next)
+        binding.dialogDatePicker.visibility = View.VISIBLE
+        binding.dialogTimePicker.visibility = View.GONE
+        binding.dialogBackButton.visibility = View.GONE
+        binding.dialogOkButton.text = getString(R.string.dialog_next)
        dateNotChosen = true
    }
 }
--- a/app/src/main/java/net/underdesk/circolapp/fragments/RemindersFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/RemindersFragment.kt
@@ -26,16 +26,19 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
-import kotlinx.android.synthetic.main.fragment_circular_letters.view.*
 import net.underdesk.circolapp.MainActivity
-import net.underdesk.circolapp.R
 import net.underdesk.circolapp.adapters.CircularLetterAdapter
 import net.underdesk.circolapp.data.AndroidCircularRepository
+import net.underdesk.circolapp.databinding.FragmentCircularLettersBinding
 import net.underdesk.circolapp.viewmodels.RemindersViewModel
 import net.underdesk.circolapp.viewmodels.RemindersViewModelFactory

 class RemindersFragment : Fragment(), MainActivity.SearchCallback {

+    private var _binding: FragmentCircularLettersBinding? = null
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
    private val remindersViewModel: RemindersViewModel by viewModels {
        RemindersViewModelFactory(
            AndroidCircularRepository.getInstance(requireContext()),
@@ -47,27 +50,32 @@ class RemindersFragment : Fragment(), MainActivity.SearchCallback {
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
-    ): View? {
-        val root = inflater.inflate(R.layout.fragment_circular_letters, container, false)
+    ): View {
+        _binding = FragmentCircularLettersBinding.inflate(inflater, container, false)

-        root.circulars_list.layoutManager = LinearLayoutManager(context)
-        root.circulars_refresh.isEnabled = false
+        binding.circularsList.layoutManager = LinearLayoutManager(context)
+        binding.circularsRefresh.isEnabled = false

        remindersViewModel.circulars.observe(
            viewLifecycleOwner,
            {
-                if (root.circulars_list.adapter == null) {
-                    root.circulars_list.adapter =
+                if (binding.circularsList.adapter == null) {
+                    binding.circularsList.adapter =
                        CircularLetterAdapter(it, activity as MainActivity, lifecycleScope)
                } else {
-                    (root.circulars_list.adapter as CircularLetterAdapter).changeDataSet(it)
+                    (binding.circularsList.adapter as CircularLetterAdapter).changeDataSet(it)
                }
            }
        )

        (activity as MainActivity).searchCallback = this
        (activity as MainActivity).refreshCallback = null
-        return root
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
    }

    override fun search(query: String) {
--- a/app/src/main/java/net/underdesk/circolapp/fragments/intro/LegalFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/intro/LegalFragment.kt
@@ -8,37 +8,50 @@ import android.view.ViewGroup
 import androidx.core.text.HtmlCompat
 import androidx.fragment.app.Fragment
 import com.github.appintro.SlidePolicy
-import kotlinx.android.synthetic.main.fragment_legal.view.*
 import net.underdesk.circolapp.R
+import net.underdesk.circolapp.databinding.FragmentLegalBinding

 class LegalFragment : Fragment(), SlidePolicy {

+    private var _binding: FragmentLegalBinding? = 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? = inflater.inflate(R.layout.fragment_legal, container, false)
+    ): View {
+        _binding = FragmentLegalBinding.inflate(inflater, container, false)
+
+        return binding.root
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        _binding = null
+    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

-        view.legal_text.text = HtmlCompat.fromHtml(
+        binding.legalText.text = HtmlCompat.fromHtml(
            getString(R.string.activity_intro_legal_text),
            HtmlCompat.FROM_HTML_MODE_COMPACT
        )
-        view.legal_text.movementMethod = LinkMovementMethod.getInstance()
+        binding.legalText.movementMethod = LinkMovementMethod.getInstance()

-        view.legal_checkbox.setOnCheckedChangeListener { checkBox, checked ->
+        binding.legalCheckbox.setOnCheckedChangeListener { checkBox, checked ->
            if (checked)
                checkBox.error = null
        }
    }

    override val isPolicyRespected: Boolean
-        get() = view?.legal_checkbox?.isChecked ?: false
+        get() = binding.legalCheckbox.isChecked

    override fun onUserIllegallyRequestedNextPage() {
-        view?.legal_checkbox?.error =
+        binding.legalCheckbox.error =
            getString(R.string.activity_intro_legal_error)
    }

--- a/app/src/main/java/net/underdesk/circolapp/fragments/intro/SchoolSelectionFragment.kt
+++ b/app/src/main/java/net/underdesk/circolapp/fragments/intro/SchoolSelectionFragment.kt
@@ -10,12 +10,17 @@ import androidx.fragment.app.Fragment
 import androidx.preference.PreferenceManager
 import com.github.appintro.SlidePolicy
 import com.tiper.MaterialSpinner
-import kotlinx.android.synthetic.main.fragment_school_selection.view.*
 import net.underdesk.circolapp.R
+import net.underdesk.circolapp.databinding.FragmentSchoolSelectionBinding
 import net.underdesk.circolapp.server.AndroidServerApi
 import net.underdesk.circolapp.shared.server.ServerAPI

 class SchoolSelectionFragment : Fragment(), SlidePolicy, MaterialSpinner.OnItemSelectedListener {
+
+    private var _binding: FragmentSchoolSelectionBinding? = null
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
    private lateinit var preferenceManager: SharedPreferences
    private var schoolSelected = false

@@ -23,7 +28,11 @@ class SchoolSelectionFragment : Fragment(), SlidePolicy, MaterialSpinner.OnItemS
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
-    ): View? = inflater.inflate(R.layout.fragment_school_selection, container, false)
+    ): View {
+        _binding = FragmentSchoolSelectionBinding.inflate(inflater, container, false)
+
+        return binding.root
+    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
@@ -34,8 +43,8 @@ class SchoolSelectionFragment : Fragment(), SlidePolicy, MaterialSpinner.OnItemS
        val adapter =
            ArrayAdapter(requireContext(), android.R.layout.simple_spinner_dropdown_item, items)

-        view.school_selection_spinner.adapter = adapter
-        view.school_selection_spinner.onItemSelectedListener = this
+        binding.schoolSelectionSpinner.adapter = adapter
+        binding.schoolSelectionSpinner.onItemSelectedListener = this
    }

    private fun getSchoolListArray(): ArrayList<String> {
@@ -68,7 +77,7 @@ class SchoolSelectionFragment : Fragment(), SlidePolicy, MaterialSpinner.OnItemS
        get() = schoolSelected

    override fun onUserIllegallyRequestedNextPage() {
-        view?.school_selection_spinner?.error =
+        binding.schoolSelectionSpinner.error =
            getString(R.string.activity_intro_school_selection_error)
    }