Replaced activity!! with requireActivity, context!! with requireContext etc. (#1458)

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ColorPickerDialog.kt

@@ -28,7 +28,7 @@ import org.isoron.uhabits.utils.toPaletteColor
 class ColorPickerDialog : ColorPickerDialog() {
     fun setListener(callback: OnColorPickedCallback) {
         super.setOnColorSelectedListener { c: Int ->
-            val pc = c.toPaletteColor(context!!)
+            val pc = c.toPaletteColor(requireContext())
             callback.onColorPicked(pc)
         }
     }

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/HistoryEditorDialog.kt

@@ -49,12 +49,12 @@ class HistoryEditorDialog : AppCompatDialogFragment(), CommandRunner.Listener {
     private var onDateClickedListener: OnDateClickedListener? = null
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        val component = (activity!!.application as HabitsApplication).component
+        val component = (requireActivity().application as HabitsApplication).component
         commandRunner = component.commandRunner
-        habit = component.habitList.getById(arguments!!.getLong("habit"))!!
+        habit = component.habitList.getById(requireArguments().getLong("habit"))!!
         preferences = component.preferences
 
-        val themeSwitcher = AndroidThemeSwitcher(activity!!, preferences)
+        val themeSwitcher = AndroidThemeSwitcher(requireActivity(), preferences)
         themeSwitcher.apply()
 
         chart = HistoryChart(
@@ -69,10 +69,10 @@ class HistoryEditorDialog : AppCompatDialogFragment(), CommandRunner.Listener {
             onDateClickedListener = onDateClickedListener ?: object : OnDateClickedListener {},
             padding = 10.0,
         )
-        dataView = AndroidDataView(context!!, null)
+        dataView = AndroidDataView(requireContext(), null)
         dataView.view = chart!!
 
-        return Dialog(context!!).apply {
+        return Dialog(requireContext()).apply {
             val metrics = resources.displayMetrics
             val maxHeight = resources.getDimensionPixelSize(R.dimen.history_editor_max_height)
             setContentView(dataView)

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/WeekdayPickerDialog.kt

@@ -60,7 +60,7 @@ class WeekdayPickerDialog :
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
         val builder = AlertDialog.Builder(
-            activity!!
+            requireActivity()
         )
         builder
             .setTitle(R.string.select_weekdays)

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/edit/HabitTypeDialog.kt

@@ -40,13 +40,13 @@ class HabitTypeDialog : AppCompatDialogFragment() {
         val binding = SelectHabitTypeBinding.inflate(inflater, container, false)
 
         binding.buttonYesNo.setOnClickListener {
-            val intent = IntentFactory().startEditActivity(activity!!, HabitType.YES_NO.value)
+            val intent = IntentFactory().startEditActivity(requireActivity(), HabitType.YES_NO.value)
             startActivity(intent)
             dismiss()
         }
 
         binding.buttonMeasurable.setOnClickListener {
-            val intent = IntentFactory().startEditActivity(activity!!, HabitType.NUMERICAL.value)
+            val intent = IntentFactory().startEditActivity(requireActivity(), HabitType.NUMERICAL.value)
             startActivity(intent)
             dismiss()
         }

uhabits-android/src/main/java/org/isoron/uhabits/activities/settings/SettingsFragment.kt

@@ -63,7 +63,7 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         addPreferencesFromResource(R.xml.preferences)
-        val appContext = context!!.applicationContext
+        val appContext = requireContext().applicationContext
         if (appContext is HabitsApplication) {
             prefs = appContext.component.preferences
             widgetUpdater = appContext.component.widgetUpdater
@@ -91,9 +91,9 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
             return true
         } else if (key == "reminderCustomize") {
             if (SDK_INT < Build.VERSION_CODES.O) return true
-            createAndroidNotificationChannel(context!!)
+            createAndroidNotificationChannel(requireContext())
             val intent = Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
-            intent.putExtra(Settings.EXTRA_APP_PACKAGE, context!!.packageName)
+            intent.putExtra(Settings.EXTRA_APP_PACKAGE, requireContext().packageName)
             intent.putExtra(Settings.EXTRA_CHANNEL_ID, NotificationTray.REMINDERS_CHANNEL_ID)
             startActivity(intent)
             return true
@@ -103,7 +103,7 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
 
     override fun onResume() {
         super.onResume()
-        ringtoneManager = RingtoneManager(activity!!)
+        ringtoneManager = RingtoneManager(requireActivity())
         sharedPrefs = preferenceManager.sharedPreferences
         sharedPrefs!!.registerOnSharedPreferenceChangeListener(this)
         if (!prefs.isDeveloper) {
@@ -146,8 +146,8 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
         val pref = findPreference(key)
         pref.onPreferenceClickListener =
             Preference.OnPreferenceClickListener {
-                activity!!.setResult(result)
-                activity!!.finish()
+                requireActivity().setResult(result)
+                requireActivity().finish()
                 true
             }
     }