Record jank metrics in old and new call logs.

Bug: 70989667
Test: unit
PiperOrigin-RevId: 186410938
Change-Id: I0671ab0bbbe957b8f034c673e6309204284756d2

3 files changed, 58 insertions, 0 deletions

diff --git a/java/com/android/dialer/metrics/Metrics.java b/java/com/android/dialer/metrics/Metrics.java
index 3922a8cfa..7cdfa220e 100644
--- a/java/com/android/dialer/metrics/Metrics.java
+++ b/java/com/android/dialer/metrics/Metrics.java
@@ -28,6 +28,12 @@ public interface Metrics {
   /** Stop a timer. */
   void stopTimer(String timerEventName);
 
+  /** Start a jank recorder. */
+  void startJankRecorder(String eventName);
+
+  /** Stop a jank recorder. */
+  void stopJankRecorder(String eventName);
+
   /** Record memory. */
   void recordMemory(String memoryEventName);
 
diff --git a/java/com/android/dialer/metrics/StubMetrics.java b/java/com/android/dialer/metrics/StubMetrics.java
index 114eb4308..f4d41e2d2 100644
--- a/java/com/android/dialer/metrics/StubMetrics.java
+++ b/java/com/android/dialer/metrics/StubMetrics.java
@@ -32,5 +32,11 @@ public final class StubMetrics implements Metrics {
   public void stopTimer(String timerEventName) {}
 
   @Override
+  public void startJankRecorder(String eventName) {}
+
+  @Override
+  public void stopJankRecorder(String eventName) {}
+
+  @Override
   public void recordMemory(String memoryEventName) {}
 }
diff --git a/java/com/android/dialer/metrics/jank/RecyclerViewJankLogger.java b/java/com/android/dialer/metrics/jank/RecyclerViewJankLogger.java
new file mode 100644
index 000000000..c9f389285
--- /dev/null
+++ b/java/com/android/dialer/metrics/jank/RecyclerViewJankLogger.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2018 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.dialer.metrics.jank;
+
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.RecyclerView.OnScrollListener;
+import com.android.dialer.metrics.Metrics;
+
+/** Logs jank for {@link RecyclerView} scrolling events. */
+public final class RecyclerViewJankLogger extends OnScrollListener {
+
+  private final Metrics metrics;
+  private final String eventName;
+
+  private boolean isScrolling;
+
+  public RecyclerViewJankLogger(Metrics metrics, String eventName) {
+    this.metrics = metrics;
+    this.eventName = eventName;
+  }
+
+  @Override
+  public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
+    if (!isScrolling && newState == RecyclerView.SCROLL_STATE_DRAGGING) {
+      isScrolling = true;
+      metrics.startJankRecorder(eventName);
+    } else if (isScrolling && newState == RecyclerView.SCROLL_STATE_IDLE) {
+      isScrolling = false;
+      metrics.stopJankRecorder(eventName);
+    }
+  }
+}