[Slider] Use the locale from the context for formatting

Author: pubiqq

lib/java/com/google/android/material/slider/BaseSlider.java

@@ -16,6 +16,8 @@
 
 package com.google.android.material.slider;
 
+import androidx.core.os.ConfigurationCompat;
+import androidx.core.os.LocaleListCompat;
 import com.google.android.material.R;
 
 import static android.view.accessibility.AccessibilityManager.FLAG_CONTENT_CONTROLS;
@@ -305,6 +307,7 @@ abstract class BaseSlider<
   @NonNull private final Paint inactiveTicksPaint;
   @NonNull private final Paint activeTicksPaint;
   @NonNull private final Paint stopIndicatorPaint;
+  @NonNull private final Locale locale;
   @NonNull private final AccessibilityHelper accessibilityHelper;
   private final AccessibilityManager accessibilityManager;
   private AccessibilityEventSender accessibilityEventSender;
@@ -476,6 +479,14 @@ public BaseSlider(
     // Initialize with just this view's visibility.
     thisAndAncestorsVisible = isShown();
 
+    LocaleListCompat ll = ConfigurationCompat.getLocales(context.getResources().getConfiguration());
+    if (ll.isEmpty()) {
+      ll = LocaleListCompat.getDefault();
+    }
+
+    //noinspection DataFlowIssue
+    locale = ll.get(0);
+
     inactiveTrackPaint = new Paint();
     activeTrackPaint = new Paint();
 
@@ -3762,7 +3773,7 @@ private String formatValue(float value) {
       return formatter.getFormattedValue(value);
     }
 
-    return String.format((int) value == value ? "%.0f" : "%.2f", value);
+    return String.format(locale, (int) value == value ? "%.0f" : "%.2f", value);
   }
 
   private void setValueForLabel(TooltipDrawable label, float value) {
@@ -4334,7 +4345,7 @@ protected void onPopulateNodeForVirtualView(
         info.setStateDescription(stateDescription);
       } else {
         contentDescription.append(
-            String.format(Locale.getDefault(), "%s, %s", verbalValueType, verbalValue));
+            String.format(slider.locale, "%s, %s", verbalValueType, verbalValue));
       }
       info.setContentDescription(contentDescription.toString());