Rate limit notification sounds/vibrations
1 alert per second.
Bug: 36662487
Test: runtest systemui-notification
Change-Id: I2046ae17b9e89ac0a83e182b91422fd242bc7557
diff --git a/services/core/java/com/android/server/notification/AlertRateLimiter.java b/services/core/java/com/android/server/notification/AlertRateLimiter.java
new file mode 100644
index 0000000..e4a7934
--- /dev/null
+++ b/services/core/java/com/android/server/notification/AlertRateLimiter.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.server.notification;
+
+
+/**
+ * {@hide}
+ */
+public class AlertRateLimiter {
+ static final long ALLOWED_ALERT_INTERVAL = 1000;
+ private long mLastNotificationMillis = 0;
+
+ boolean isRateLimited(long now) {
+ final long millisSinceLast = now - mLastNotificationMillis;
+ if (millisSinceLast < 0 || millisSinceLast < ALLOWED_ALERT_INTERVAL) {
+ return true;
+ }
+ mLastNotificationMillis = now;
+ return false;
+ }
+}