From ad301ea682fbc4df62144245ddaca570945b98d1 Mon Sep 17 00:00:00 2001
From: "David G. Young" <davidgyoung@gmail.com>
Date: Thu, 9 Jul 2015 21:51:31 -0400
Subject: [PATCH] Only use Andoroid 5 BLE scanning filters in the background

---
 .../org/altbeacon/beacon/AltBeaconParser.java    | 11 ++++++++++-
 .../scanner/CycledLeScannerForLollipop.java      |  7 ++++---
 .../org/altbeacon/beacon/BeaconParserTest.java   | 16 ++++++++++++++++
 3 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/src/main/java/org/altbeacon/beacon/AltBeaconParser.java b/src/main/java/org/altbeacon/beacon/AltBeaconParser.java
index 2e9fcdd23..1d6b49172 100644
--- a/src/main/java/org/altbeacon/beacon/AltBeaconParser.java
+++ b/src/main/java/org/altbeacon/beacon/AltBeaconParser.java
@@ -41,7 +41,16 @@ public class AltBeaconParser extends BeaconParser {
      */
     public AltBeaconParser() {
         super();
-        mHardwareAssistManufacturers = new int[]{0x0118}; // Radius networks
+        // Radius networks and other manufacturers seen in AltBeacons
+        // Note: Other manufacturer codes that have been seen in the wild with AltBeacons are:
+        // 0x004c, 0x00e0
+        // We are not adding these here because there is no indication they are widely used
+        // for production purposes.  We need to keep the hardware assist list short in order to
+        // save slots.  If you are a manufacturer of AltBeacons and want you company code added to
+        // this list, please open an issue on the Github project for this library.  If a beacon
+        // manufacturer code not in this list is used for AltBeacons, phones using Andoroid 5.x+
+        // detection APIs will not be able to detect the beacon in the background.
+        mHardwareAssistManufacturers = new int[]{0x0118};
         this.setBeaconLayout("m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25");
     }
     /**
diff --git a/src/main/java/org/altbeacon/beacon/service/scanner/CycledLeScannerForLollipop.java b/src/main/java/org/altbeacon/beacon/service/scanner/CycledLeScannerForLollipop.java
index 38eedff5e..50c8bf1d9 100644
--- a/src/main/java/org/altbeacon/beacon/service/scanner/CycledLeScannerForLollipop.java
+++ b/src/main/java/org/altbeacon/beacon/service/scanner/CycledLeScannerForLollipop.java
@@ -166,6 +166,9 @@ protected void startScan() {
         if (mBackgroundFlag) {
             LogManager.d(TAG, "starting scan in SCAN_MODE_LOW_POWER");
             settings = (new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)).build();
+            filters = new ScanFilterUtils().createScanFiltersForBeaconParsers(
+                    mBeaconManager.getBeaconParsers());
+
         } else {
             LogManager.d(TAG, "starting scan in SCAN_MODE_LOW_LATENCY");
             settings = (new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)).build();
@@ -174,11 +177,9 @@ protected void startScan() {
 
         try {
             if (getScanner() != null) {
-                List scanFilters = new ScanFilterUtils().createScanFiltersForBeaconParsers(
-                        mBeaconManager.getBeaconParsers());
                 ScanCallback callback = getNewLeScanCallback();
                 try {
-                    getScanner().startScan(scanFilters, settings, callback);
+                    getScanner().startScan(filters, settings, callback);
                 }
                 catch (NullPointerException npe) {
                     // Necessary because of https://code.google.com/p/android/issues/detail?id=160503
diff --git a/src/test/java/org/altbeacon/beacon/BeaconParserTest.java b/src/test/java/org/altbeacon/beacon/BeaconParserTest.java
index 598157b82..c750d98d9 100644
--- a/src/test/java/org/altbeacon/beacon/BeaconParserTest.java
+++ b/src/test/java/org/altbeacon/beacon/BeaconParserTest.java
@@ -214,6 +214,22 @@ public void testParseIdentifierThatRunsUnderPduLength() {
         assertNull("beacon should not be parsed", beacon);
     }
 
+    @Test
+    public void testParseProblematicBeaconFromIssue229() {
+        org.robolectric.shadows.ShadowLog.stream = System.err;
+
+        // Note that the length field below is 0x16 instead of 0x1b, indicating that the packet ends
+        // one byte before the second identifier field starts
+
+        byte[] bytes = hexStringToByteArray("0201061bffe000beac7777772e626c756b692e636f6d000100010001abaa000000");
+        BeaconParser parser = new BeaconParser();
+        parser.setBeaconLayout("m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25");
+
+        Beacon beacon = parser.fromScanData(bytes, -55, null);
+        assertNotNull("beacon should be parsed", beacon);
+    }
+
+
     @Test
     public void testCanParseLocationBeacon() {
         double latitude = 38.93;