commit 4b923c4ba4d06d18493d85f05bd17004988afdd9
author Vasu Nori <vnori@norinori.mtv.corp.google.com> Wed Sep 13 12:38:47 2017 -0700
committer Vasu Nori <vnori@google.com> Wed Sep 13 13:37:59 2017 -0700
tree 543a3f5e5b7eb60946ddc1d147cbdba603e29b15
parent 0bda2f3f7ee353c1e0a1bb6b11735608f7902091

consider the situations where the device has only one volume level set.

Bug: 65125561
Test: runtest bluetooth -c
com.android.bluetooth.hfpclient.HeadsetClientStateMachineTest doesn't
crash now

Change-Id: I3474e60f04732c60de215a41125a9436c5ff122c

android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java

diff --git a/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java b/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
index 180d91c..604ab5a 100755
--- a/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
+++ b/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
@@ -751,7 +751,7 @@
     }
 
     static int amToHfVol(int amVol) {
-        int amRange = mMaxAmVcVol - mMinAmVcVol;
+        int amRange = (mMaxAmVcVol > mMinAmVcVol) ? (mMaxAmVcVol - mMinAmVcVol) : 1;
         int hfRange = MAX_HFP_SCO_VOICE_CALL_VOLUME - MIN_HFP_SCO_VOICE_CALL_VOLUME;
         int hfOffset = (hfRange * (amVol - mMinAmVcVol)) / amRange;
         int hfVol = MIN_HFP_SCO_VOICE_CALL_VOLUME + hfOffset;