Widget/compatibility

app/src/main/java/eu/faircode/email/WidgetSync.java

@@ -63,7 +63,8 @@ public class WidgetSync extends AppWidgetProvider {
                 views.setOnClickPendingIntent(R.id.ivSync, pi);
 
                 views.setImageViewResource(R.id.ivSync, enabled ? R.drawable.twotone_sync_24 : R.drawable.twotone_sync_disabled_24);
-                views.setFloat(R.id.ivSync, "setAlpha", !enabled || connected ? 1.0f : Helper.LOW_LIGHT);
+                views.setInt(R.id.ivSync, "setImageAlpha",
+                        !enabled || connected ? 255 : Math.round(Helper.LOW_LIGHT * 255));
 
                 if (!daynight && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
                     views.setColorStateListAttr(R.id.background, "setBackgroundTintList", 0);

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

@@ -95,5 +95,5 @@
         android:id="@+id/separator"
         android:layout_width="match_parent"
         android:layout_height="1dp"
-        android:background="?android:colorControlNormal" />
+        android:background="@color/grey" />
 </LinearLayout>

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

@@ -57,7 +57,7 @@
             android:id="@+id/separator"
             android:layout_width="match_parent"
             android:layout_height="1dp"
-            android:background="?android:colorControlNormal" />
+            android:background="@color/grey" />
 
         <ListView
             android:id="@+id/lv"