commit 580135c1b8c58a3d8834531a1df1029a18f343a4
author Nimrod Gileadi <nimrod@google.com> Mon Oct 31 20:42:19 2016 +0000
committer Nimrod Gileadi <nimrod@google.com> Mon Oct 31 21:43:37 2016 +0000
tree 1f41a85414d14cb71ebd557f4c73f33fd49cc014
parent 1e0055bb51cdd0e7b71e736f73bd526a84b67974

Increment a MetricsLogger counter on back press.

For Wear, we want to know how often users press the side button, which
is mapped to a back key press. The number of times the back button is
pressed is probably a useful metric for the rest of Android.

The counter string, "key_back_down" is not yet declared in
go/tron-counters, but we should get the framework change in ASAP.

Bug: 32396371
Change-Id: Ia102318cd5ca4d077ce404944084806198c334f7

services/core/java/com/android/server/policy/PhoneWindowManager.java

diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 915b882..b2f6cd2 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -1042,6 +1042,7 @@
     }
 
     private void interceptBackKeyDown() {
+        MetricsLogger.count(mContext, "key_back_down", 1);
         // Reset back key state for long press
         mBackKeyHandled = false;