AltBeacon 正在停止信标扫描。但继续扫描

【问题标题】：AltBeacon is stopping the beacon scan. But keep scanningAltBeacon 正在停止信标扫描。但继续扫描
【发布时间】：2020-12-14 06:44:47
【问题描述】：

设计为每 4 秒扫描一次。 但是，从扫描开始到停止，可能无法检测到信标。
之后，停止扫描后检测到信标。

问题出现在日志中的以下日期和时间。
08:54:20.807 D/CycledLeScanner(21211)：扫描开始
08:54:21.906 D/CycledLeScanner(21211)：完成扫描周期
08:54:22.336 D/Cycled LeScanner(21211)：停止蓝牙文件扫描
08:54:23.638 D/CycledLeScannerForLollipop(21211): 得到记录

出现此问题后，扫描始终完成。
此问题会关闭设备上的蓝牙。或者，如果您退出应用程序，它将得到解决。当我让程序运行 12 小时时出现此问题。
它似乎很少发生，但我不知道是什么触发了它。
谁能帮我解决这个问题？
下面列出了终端信息、源代码和日志。

箭头 M03
安卓操作系统 6.0
'org.altbeacon:android-beacon-library:2.16.2'

主活动

public class MainActivity extends AppCompatActivity implements BeaconConsumer {

private BeaconManager beaconManager;
Region mRegion;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    beaconManager = BeaconManager.getInstanceForApplication(this);
    beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
    beaconManager.getBeaconParsers().remove(0);
    beaconManager.setForegroundBetweenScanPeriod(4000);

    mRegion = new Region("ibeacon", null, null, null);

    Button btnFore = (Button) findViewById(R.id.btnFore);
    btnFore.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            beaconManager.bind(MainActivity.this);
            beaconManager.setDebug(true);
        }
    });

    thdWriteLog l_thdWriteLog = new thdWriteLog();
    l_thdWriteLog.start();
}

@Override
public void onBeaconServiceConnect() {
    beaconManager.addMonitorNotifier(new MonitorNotifier() {
        @Override
        public void didEnterRegion(Region region) {}

        @Override
        public void didExitRegion(Region region) {}

        @Override
        public void didDetermineStateForRegion(int i, Region region) {}
    });

    try {
        beaconManager.startMonitoringBeaconsInRegion(mRegion);
    } catch (RemoteException e) {
        e.printStackTrace();
    }

    beaconManager.addRangeNotifier(new RangeNotifier() {
        @Override
        public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {}
    });
}

输出日志程序

public class thdWriteLog extends Thread {

@Override
public void run() {
    java.lang.Process proc = null;
    BufferedReader reader = null;
    PrintWriter writer = null;

    final String pId =  Integer.toString(android.os.Process.myPid());

    try {
        proc = Runtime.getRuntime().exec(new String[] { "logcat", "-v", "time"});
        reader = new BufferedReader(new InputStreamReader(proc.getInputStream()), 1024);
        String line;

        while ( true ) {

            line = reader.readLine();
            if (line.length() == 0) {
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                }
                continue;
            }

            if (line.indexOf(pId) != -1) {

                try {
                    OutputStream out;
                    File l_file = new File(Environment.getExternalStorageDirectory().getPath() + "/log.text");

                    out = new FileOutputStream(l_file, true);
                    writer = new PrintWriter(new OutputStreamWriter(out,"UTF-8"));

                    String l_time = line.substring(0, 18);
                    String l_logType = line.substring(19, 21);
                    String l_logStr1 = line.substring(21, line.indexOf("):") + 2);
                    String l_logStr2 = line.substring(line.indexOf("):") + 3);
                    String l_logStr = l_time + ',' + l_logType + ',' + l_logStr1 + ',' + l_logStr2;

                    writer.println(l_logStr);
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    if (writer != null) {
                        writer.close();
                    }
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

日志

08:54:16.812 D/CycledLeScanner(21211)：在扫描周期从 4000 到 3987 之间进行归一化
08:54:16.812 D/CycledLeScannerForLollipop(21211)：这是 Android L，但我们最后一次看到信标是在 10 年前，所以我们不会在后台继续扫描。
08:54:16.812 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 3987 毫秒
08:54:16.812 D/CycledLeScannerForLollipop(21211)：在扫描处理程序上停止 LE 扫描
08:54:16.814 D/蓝牙适配器（21211）：STATE_ON
08:54:17.815 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 2984 毫秒
08:54:18.818 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 1981 毫秒
08:54:19.820 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 979 毫秒
08:54:20.801 D/CycledLeScanner(21211)：开始新的扫描周期
08:54:20.803 D/CycledLeScanner(21211)：开始新的蓝牙文件扫描
08:54:20.805 D/CycledLeScannerForLollipop(21211)：在 SCAN_MODE_LOW_LATENCY 中开始扫描
08:54:20.805 D/CycledLeScannerForLollipop(21211)：不使用扫描过滤器，因为这是 8.1 之前的版本
08:54:20.806 D/蓝牙适配器（21211）：STATE_ON
08:54:20.807 D/CycledLeScanner(21211)：等待再停止扫描周期 1100 毫秒
08:54:20.807 D/CycledLeScanner(21211)：扫描开始
08:54:21.810 D/CycledLeScanner(21211)：等待再停止扫描周期 95 毫秒
08:54:21.906 D/CycledLeScanner(21211)：完成扫描周期
08:54:21.906 D/ScanHelper(21211)：信标模拟器未启用
08:54:22.336 D/CycledLeScanner(21211)：停止蓝牙文件扫描
08:54:22.336 D/CycledLeScannerForLollipop(21211)：停止扫描
08:54:22.339 D/CycledLeScanner(21211)：在 4000 到 3560 的扫描周期之间进行归一化
08:54:22.339 D/CycledLeScannerForLollipop(21211)：这是 Android L，但我们最后一次看到信标是在 5537 年前，所以我们不会在后台继续扫描。
08:54:22.342 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 3560 毫秒
08:54:22.813 D/CycledLeScannerForLollipop(21211)：在扫描处理程序上停止 LE 扫描
08:54:22.814 D/蓝牙适配器（21211）：STATE_ON
08:54:22.814 D/BluetoothLeScanner(21211): 找不到回调包装器
08:54:23.430 E/CycledLeScannerForLollipop(21211)：扫描失败：无法注册应用程序
08:54:23.430 D/CycledLeScannerForLollipop(21211)：等待开始完整的蓝牙扫描另外 2469 毫秒
08:54:23.468 D/BluetoothLeScanner(21211): onClientRegistered() - status=0 clientIf=7
08:54:23.638 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.643 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.643 D/BeaconParser(21211): Processing pdu type FF: 02011a0bff4c0009060301c0a8000f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 14
08:54:23.643 D/BeaconParser(21211)：这不是匹配的 Beacon 广告。 （期待02 15。我看到的字节是：02011a0bff4c0009060301c0a8000f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 08:54:23.669 D/CycledLeScannerForLollipop(21211)：获得记录
08：54：23.670 D/BEACONPARSER（21211）：处理PDU类型FF：1EFF060001092D9D9DA8D7C318BA216CF4F4F4F4F0F1840361AB991AB991AB91AB91A8F91A8F570000000000000000000000000000000000000000000000来： 08:54:23.670 D/BeaconParser(21211)：这不是匹配的 Beacon 广告。 （期待02 15。我看到的字节是：1eff060001092002d9da8d7c318ba216cf4f0f1840361ab991a8f9fe57a93c0000000000000000000000000000000000000000000000000000000000000000 08:54:23.677 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.678 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.678 D/BeaconParser(21211): Processing pdu type FF: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 29
08:54:23.679 D/BeaconParser(21211)：这是公认的信标广告 -- 02 15 看到
08:54:23.679 D/BeaconParser(21211): Bytes are: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000
08:54:23.691 D/ScanHelper(21211): 检测到信标包: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -62
08:54:23.695 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.695 D/ScanHelper(21211): 检测到信标: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.696 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.699 D/BeaconParser(21211): Processing pdu type FF: 0201061aff4c000215d9407f30f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 29
08:54:23.703 D/BeaconParser(21211)：这是公认的信标广告 -- 02 15 看到
08:54:23.706 D/BeaconParser(21211): Bytes are: 0201061aff4c000215d9407f30f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000
08:54:23.719 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.720 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.720 D/BeaconParser(21211): Processing pdu type FF: 0201061aff4c000215b9407f30f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 29
08:54:23.720 D/ScanHelper(21211): 检测到信标包: id1: d9407f30-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -64
08:54:23.720 D/BeaconParser(21211)：这是一个公认的信标广告 -- 02 15 看到
08:54:23.720 D/ScanHelper(21211): 检测到信标: id1: d9407f30-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.720 D/BeaconParser(21211): Bytes are: 0201061aff4c000215b9407f30f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000
08:54:23.720 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.724 D/ScanHelper(21211): 检测到信标包: id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -60
08:54:23.724 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.724 D/ScanHelper(21211): 检测到信标: id1: b9407f30-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.724 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.778 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.779 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.779 D/BeaconParser(21211): Processing pdu type FF: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 29
08:54:23.779 D/BeaconParser(21211)：这是一个公认的信标广告 -- 02 15 看到
08:54:23.780 D/BeaconParser(21211): Bytes are: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000
08:54:23.784 D/ScanHelper(21211): 检测到信标包: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -72
08:54:23.784 D/ScanHelper(21211): 检测到信标: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.785 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.797 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.798 D/BeaconParser(21211): Processing pdu type FF: 1aff4c000215b9407f91f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000000000 with startIndex: 2 endIndex: 26
08:54:23.798 D/BeaconParser(21211): 这是一个公认的信标广告 -- 02 15 看到
08：54：23.798 D/BEACONPARSER（21211）：字节为：1AFF4C000215B9407F91F91F5F55F8466AEFF925555557FE6B57FE6D000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000来了 08:54:23.801 D/ScanHelper(21211): 检测到信标包: id1: b9407f91-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -71
08:54:23.801 D/ScanHelper(21211): 检测到信标: id1: b9407f91-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.802 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.888 D/CycledLeScannerForLollipop(21211)：获得记录
08：54：23.892 D/BEACONPARSER（21211）：处理PDU类型FF：1EFF06000109292929291ED7A8667FAFFF88483E841CB1B14CA9A67F84CA67F8EB84AAA2000000000000000000000000000000000000000000000000000000000000个： 08:54:23.892 D/BeaconParser(21211)：这不是匹配的 Beacon 广告。 （期待02 15。我看到的字节是：1eff0600010920029291ed7a8667fafff88483e841cb14ca9a67f8eb84aaa20000000000000000000000000000000000000000000000000000000000000 08:54:23.965 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.966 D/BeaconParser(21211)：忽略 pdu 类型 01
08:54:23.966 D/BeaconParser(21211): Processing pdu type FF: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000 with startIndex: 5 endIndex: 29
08:54:23.966 D/BeaconParser(21211)：这是公认的信标广告 -- 02 15 看到
08:54:23.966 D/BeaconParser(21211): Bytes are: 0201061aff4c000215b9407f90f5f8466eaff925556b57fe6d00000000c40000000000000000000000000000000000000000000000000000000000000000
08:54:23.977 D/ScanHelper(21211): 检测到信标包: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0 with rssi -72
08:54:23.977 D/ScanHelper(21211): 检测到信标: id1: b9407f90-f5f8-466e-aff9-25556b57fe6d id2: 0 id3: 0
08:54:23.977 D/ScanHelper(21211)：寻找此信标的测距区域匹配
08:54:23.994 D/CycledLeScannerForLollipop(21211)：获得记录
08:54:23.997 D/BeaconParser(21211)：忽略 pdu 类型 01
08：54：23.997 D/BEACONPARSER（21211）：处理PDU类型FF：0201061AFF4C000215E9407F30F55F55F55F555555555555700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000099999安州州

【问题讨论】：

    标签： android beacon altbeacon android-ibeacon


    【解决方案1】：

    在您在日志中显示的情况下，底层 Android API 停止扫描的命令失败：

    08:54:22.813 D/CycledLeScannerForLollipop(21211): Stopping LE scan on scan handler
08:54:22.814 D/BluetoothAdapter(21211): STATE_ON
08:54:22.814 D/BluetoothLeScanner(21211): could not find callback wrapper
08:54:23.430 E/ CycledLeScannerForLollipop(21211): Scan failed: app cannot be registered

    上面最后一行显示“扫描失败”，这实际上是指尝试停止扫描。

    这肯定是测试设备上蓝牙堆栈内部的问题。由于 Android 蓝牙堆栈和底层蓝牙芯片之间的接口总是涉及 OEM 的一些专有定制，这很可能是由于该实现中的一些错误造成的。

    由于您无法修复蓝牙堆栈，因此最好的办法是尝试找到某种解决方法来重新获得对扫描的控制权。这无疑需要反复试验。您可以尝试禁用 Android Beacon Library 的扫描服务，然后重新启动它，方法是停止所有监控（如果已完成，则进行测距），等待 30 秒，然后重新启动监控（如果需要，进行测距）。

    【讨论】：

    • 谢谢。我尝试停止所有监控（如果已完成，则进行测距），等待 30 秒，然后重新启动监控（如果需要，进行测距）。扫描失败后发生。然而，问题仍然存在。蓝牙关闭 30 秒再打开时，情况有所改善。
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