Create a singleton HashMap instead of using Collections.singleton()
The Set returned by Collections.singleton() doesn't support all
operations, causing crashes in certain situations (namely, whenever
a notification is updated rather than added or removed).
Change-Id: Ie104b7f99c4a32db5f1f7e43ec3775d34dc26ce1
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 267cb2a..be3297c 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -60,6 +60,7 @@
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collection;
+import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import java.util.concurrent.Executor;
@@ -648,4 +649,14 @@
throw new RuntimeException(e);
}
}
+
+ /**
+ * Returns a HashSet with a single element. We use this instead of Collections.singleton()
+ * because HashSet ensures all operations, such as remove, are supported.
+ */
+ public static <T> HashSet<T> singletonHashSet(T elem) {
+ HashSet<T> hashSet = new HashSet<>(1);
+ hashSet.add(elem);
+ return hashSet;
+ }
}