以下代码在我的 Nexus 9 上运行良好,其运行的 Android 版本为 5.1.1(Build LMY48M),但在运行 Android 6.0(Build MPA44l)的 Nexus 9 上无法正常工作。
List<ScanFilter> filters = new ArrayList<ScanFilter>();
ScanSettings settings = (new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)).build();
ScanFilter.Builder builder = new ScanFilter.Builder();
builder.setManufacturerData((int) 0x0118, new byte[]{(byte) 0xbe, (byte) 0xac}, new byte[]{(byte) 0xff, (byte)0xff});
ScanFilter scanFilter = builder.build();
filters.add(scanFilter);
mBluetoothLeScanner.startScan(filters, settings, new ScanCallback() {
...
});
在Android 5.x上,以上代码会在扫描过滤器匹配到厂商广告时产生回调(见下面例子的Logcat输出)。但在搭载MPA44l的Nexus 9上则不会收到任何回调。如果注释掉扫描过滤器,则在Nexus 9上可以成功接收回调。
09-22 00:07:28.050 1748-1796/org.altbeacon.beaconreference D/BluetoothLeScanner﹕ onScanResult() - ScanResult{mDevice=00:07:80:03:89:8C, mScanRecord=ScanRecord [mAdvertiseFlags=6, mServiceUuids=null, mManufacturerSpecificData={280=[-66, -84, 47, 35, 68, 84, -49, 109, 74, 15, -83, -14, -12, -111, 27, -87, -1, -90, 0, 1, 0, 1, -66, 0]}, mServiceData={}, mTxPowerLevel=-2147483648, mDeviceName=null], mRssi=-64, mTimestampNanos=61272522487278}
有人看到ScanFilters在Android M上工作吗?