Merge pull request #259 from Naveen3Singh/locale_separator

Use device locale's decimal separator by default

app/src/main/AndroidManifest.xml

@@ -80,6 +80,14 @@
                 android:resource="@xml/widget_info" />
         </receiver>
 
+        <receiver
+            android:name=".receivers.LocaleChangeReceiver"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.LOCALE_CHANGED" />
+            </intent-filter>
+        </receiver>
+
         <activity-alias
             android:name=".activities.SplashActivity.Red"
             android:enabled="false"

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/Config.kt

@@ -9,6 +9,6 @@ class Config(context: Context) : BaseConfig(context) {
     }
 
     var useCommaAsDecimalMark: Boolean
-        get() = prefs.getBoolean(USE_COMMA_AS_DECIMAL_MARK, false)
+        get() = prefs.getBoolean(USE_COMMA_AS_DECIMAL_MARK, getDecimalSeparator() == COMMA)
         set(useCommaAsDecimalMark) = prefs.edit().putBoolean(USE_COMMA_AS_DECIMAL_MARK, useCommaAsDecimalMark).apply()
 }

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/NumberFormatHelper.kt

@@ -29,3 +29,7 @@ class NumberFormatHelper(
         return str.replace(groupingSeparator, "").replace(decimalSeparator, DOT)
     }
 }
+
+fun getDecimalSeparator(): String {
+    return DecimalFormatSymbols.getInstance().decimalSeparator.toString()
+}

app/src/main/kotlin/com/simplemobiletools/calculator/receivers/LocaleChangeReceiver.kt

@@ -0,0 +1,15 @@
+package com.simplemobiletools.calculator.receivers
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import com.simplemobiletools.calculator.extensions.updateWidgets
+
+class LocaleChangeReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (Intent.ACTION_LOCALE_CHANGED == intent.action) {
+            context.updateWidgets()
+        }
+    }
+}