Change RSSI notification levels to 5 in framework

At some point the system UI switched to using 5 rssi levels
while the framework only broadcasts a change for 4 levels.

Hence RSSI change can be slow to be displayed on the UI, fix this

Bug: 5732700
Change-Id: I21700f96ba7a8dd678fb2ccfff8ef59f9b696666

2 files changed, 9 insertions, 5 deletions

diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index 40ac2a0..1a0e0da 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -413,6 +413,13 @@ public class WifiManager {
     private static final int MAX_RSSI = -55;
 
     /**
+     * Number of RSSI levels used in the framework to initiate
+     * {@link #RSSI_CHANGED_ACTION} broadcast
+     * @hide
+     */
+    public static final int RSSI_LEVELS = 5;
+
+    /**
      * Auto settings in the driver. The driver could choose to operate on both
      * 2.4 GHz and 5 GHz or make a dynamic decision on selecting the band.
      * @hide
diff --git a/wifi/java/android/net/wifi/WifiStateMachine.java b/wifi/java/android/net/wifi/WifiStateMachine.java
index aadcaad..23b726e 100644
--- a/wifi/java/android/net/wifi/WifiStateMachine.java
+++ b/wifi/java/android/net/wifi/WifiStateMachine.java
@@ -1423,14 +1423,11 @@ public class WifiStateMachine extends StateMachine {
              * be displayed in the status bar, and only send the
              * broadcast if that much more coarse-grained number
              * changes. This cuts down greatly on the number of
-             * broadcasts, at the cost of not mWifiInforming others
+             * broadcasts, at the cost of not informing others
              * interested in RSSI of all the changes in signal
              * level.
              */
-            // TODO: The second arg to the call below needs to be a symbol somewhere, but
-            // it's actually the size of an array of icons that's private
-            // to StatusBar Policy.
-            int newSignalLevel = WifiManager.calculateSignalLevel(newRssi, 4);
+            int newSignalLevel = WifiManager.calculateSignalLevel(newRssi, WifiManager.RSSI_LEVELS);
             if (newSignalLevel != mLastSignalLevel) {
                 sendRssiChangeBroadcast(newRssi);
             }