do not allow toggling between 12/24 time format in the app itself

app/src/main/kotlin/com/simplemobiletools/clock/activities/MainActivity.kt

@@ -14,7 +14,10 @@ import com.simplemobiletools.clock.extensions.getNextAlarm
 import com.simplemobiletools.clock.extensions.rescheduleEnabledAlarms
 import com.simplemobiletools.clock.helpers.*
 import com.simplemobiletools.commons.extensions.*
-import com.simplemobiletools.commons.helpers.*
+import com.simplemobiletools.commons.helpers.LICENSE_NUMBER_PICKER
+import com.simplemobiletools.commons.helpers.LICENSE_RTL
+import com.simplemobiletools.commons.helpers.LICENSE_STETHO
+import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 import com.simplemobiletools.commons.models.FAQItem
 import kotlinx.android.synthetic.main.activity_main.*
 

app/src/main/kotlin/com/simplemobiletools/clock/activities/SettingsActivity.kt

@@ -26,7 +26,6 @@ class SettingsActivity : SimpleActivity() {
         setupCustomizeColors()
         setupUseEnglish()
         setupPreventPhoneFromSleeping()
-        setupHourFormat()
         setupSundayFirst()
         setupShowSeconds()
         setupAlarmMaxReminder()
@@ -104,15 +103,6 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
-    private fun setupHourFormat() {
-        settings_hour_format.isChecked = config.use24HourFormat
-        settings_hour_format_holder.setOnClickListener {
-            settings_hour_format.toggle()
-            config.use24HourFormat = settings_hour_format.isChecked
-            updateWidgets()
-        }
-    }
-
     private fun setupSundayFirst() {
         settings_sunday_first.isChecked = config.isSundayFirst
         settings_sunday_first_holder.setOnClickListener {

app/src/main/kotlin/com/simplemobiletools/clock/dialogs/EditAlarmDialog.kt

@@ -4,6 +4,7 @@ import android.app.TimePickerDialog
 import android.graphics.drawable.Drawable
 import android.media.AudioManager
 import android.media.RingtoneManager
+import android.text.format.DateFormat
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import com.simplemobiletools.clock.R
@@ -36,7 +37,7 @@ class EditAlarmDialog(val activity: SimpleActivity, val alarm: Alarm, val callba
                     timeSetListener,
                     alarm.timeInMinutes / 60,
                     alarm.timeInMinutes % 60,
-                    context.config.use24HourFormat
+                    DateFormat.is24HourFormat(activity)
                 ).show()
             }
 

app/src/main/kotlin/com/simplemobiletools/clock/extensions/Context.kt

@@ -11,6 +11,7 @@ import android.media.RingtoneManager
 import android.net.Uri
 import android.os.PowerManager
 import android.text.SpannableString
+import android.text.format.DateFormat
 import android.text.style.RelativeSizeSpan
 import android.widget.Toast
 import androidx.core.app.AlarmManagerCompat
@@ -189,7 +190,7 @@ fun Context.updateWidgets() {
 }
 
 fun Context.getFormattedTime(passedSeconds: Int, showSeconds: Boolean, makeAmPmSmaller: Boolean): SpannableString {
-    val use24HourFormat = config.use24HourFormat
+    val use24HourFormat = DateFormat.is24HourFormat(this)
     val hours = (passedSeconds / 3600) % 24
     val minutes = (passedSeconds / 60) % 60
     val seconds = passedSeconds % 60

app/src/main/kotlin/com/simplemobiletools/clock/fragments/ClockFragment.kt

@@ -2,6 +2,7 @@ package com.simplemobiletools.clock.fragments
 
 import android.os.Bundle
 import android.os.Handler
+import android.text.format.DateFormat
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -83,7 +84,7 @@ class ClockFragment : Fragment() {
         val seconds = passedSeconds % 60
         view.clock_time.text = requireContext().getFormattedTime(passedSeconds, requireContext().config.showSeconds, true)
 
-        if (!requireContext().config.use24HourFormat) {
+        if (!DateFormat.is24HourFormat(requireContext())) {
             view.clock_time.textSize = resources.getDimension(R.dimen.clock_text_size_smaller) / resources.displayMetrics.density
         }
 

app/src/main/kotlin/com/simplemobiletools/clock/helpers/MyWidgetDateTimeProvider.kt

@@ -8,6 +8,7 @@ import android.content.Context
 import android.content.Intent
 import android.graphics.*
 import android.os.Bundle
+import android.text.format.DateFormat
 import android.widget.RemoteViews
 import com.simplemobiletools.clock.R
 import com.simplemobiletools.clock.activities.SplashActivity
@@ -78,7 +79,7 @@ class MyWidgetDateTimeProvider : AppWidgetProvider() {
 
         val isIn24HoursFormat = !nextAlarm.endsWith(".")
         return when {
-            context.config.use24HourFormat && !isIn24HoursFormat -> {
+            DateFormat.is24HourFormat(context) && !isIn24HoursFormat -> {
                 val dayTime = nextAlarm.split(" ")
                 val times = dayTime[1].split(":")
                 val hours = times[0].toInt()
@@ -93,7 +94,7 @@ class MyWidgetDateTimeProvider : AppWidgetProvider() {
                 }
                 formatTime(false, true, newHours, minutes, seconds)
             }
-            !context.config.use24HourFormat && isIn24HoursFormat -> {
+            !DateFormat.is24HourFormat(context) && isIn24HoursFormat -> {
                 val times = nextAlarm.split(" ")[1].split(":")
                 val hours = times[0].toInt()
                 val minutes = times[1].toInt()

app/src/main/res/layout/activity_settings.xml

@@ -122,22 +122,6 @@
 
             </RelativeLayout>
 
-            <RelativeLayout
-                android:id="@+id/settings_hour_format_holder"
-                style="@style/SettingsHolderCheckboxStyle"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="@drawable/ripple_background">
-
-                <com.simplemobiletools.commons.views.MyAppCompatCheckbox
-                    android:id="@+id/settings_hour_format"
-                    style="@style/SettingsCheckboxStyle"
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:text="@string/use_24_hour_time_format" />
-
-            </RelativeLayout>
-
             <RelativeLayout
                 android:id="@+id/settings_sunday_first_holder"
                 style="@style/SettingsHolderCheckboxStyle"