Question

我的信标检测存在问题。

有时应用程序循环遍历BootstrapNotifier回调（didDetermineStateForRegion（int arg0，Region arg1），didEnterRegion（Region arg0）和didExitRegion（Region arg0））。

有时会在我启动应用程序时出现，有时则是应用程序处于后台时...我没有找到任何模式，因此我不知道问题出在哪里。

循环就像这样（只有一块日志）：

D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didExitRegion call: null
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didExitRegion call: null
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didExitRegion call: null
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didExitRegion call: null
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didExitRegion call: null
D/MyApplication: Got a didDetermineStateForRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6
D/MyApplication: Got a didEnterRegion call: 2f234454-cf6d-4a0f-adf2-f4911ba9ffa6

为什么会这样？该应用程序检测到该区域，但不会立即启动信标扫描。在这个循环或多或少一分钟之后，扫描通常开始（但不总是）。

要测试应用程序，我使用此信标软件模拟器作为发送器（https://github.com/WebBluetoothCG/ble-test-peripheral-android）

--------------更新------------

我的代码：

public class BeaconApplication extends Application implements BootstrapNotifier, BeaconConsumer {

    private String TAG = "MyApplication";
    private BeaconManager beaconManager;
    private Region region;


    @Override
    public void onCreate() {
        super.onCreate();
        startBeaconScan();
    }

    public void startBeaconScan() {

        Log.d(TAG, "App started up");

        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,d:25-25"));  //iBeacon layout

        beaconManager.setRegionStatePeristenceEnabled(false);
        beaconManager.bind(this);

        region = new Region("myMonitoringUniqueId", Identifier.parse("2f234454-cf6d-4a0f-adf2-f4911ba9ffa6"), null, null);
        new RegionBootstrap(this, region);
    }

    @Override
    public void didDetermineStateForRegion(int arg0, Region arg1) {
        beaconManager.addRangeNotifier(new RangeNotifier() {
            @Override
            public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
               //CODE FOR BEACON DETECTION    
            }
        });

        try {
            beaconManager.startRangingBeaconsInRegion(region);
        } catch (RemoteException e) {
            e.printStackTrace();
        }
        Log.d(TAG, "Got a didDetermineStateForRegion call: " + arg1.getId1());
    }

    @Override
    public void didEnterRegion(Region arg0) {
        Log.d(TAG, "Got a didEnterRegion call: " + arg0.getId1());
    }

    @Override
    public void didExitRegion(Region arg0) {
        Log.d(TAG, "Got a didExitRegion call: " + arg0.getBluetoothAddress());
    }

    @Override
    public void onBeaconServiceConnect() {
        try {
            beaconManager.setBackgroundBetweenScanPeriod(500);
            beaconManager.setBackgroundScanPeriod(500);
            beaconManager.setForegroundBetweenScanPeriod(500);
            beaconManager.setForegroundScanPeriod(500);
            beaconManager.updateScanPeriods();
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }
}

我尝试过“beaconManager.startRangingBeaconsInRegion（region）;”在“onBeaconServiceConnect（）”回调中，但似乎没有产生任何差异。

Answer 1

有两件事可能导致这种情况：

设置如此短的扫描周期可能会有问题，除非您肯定您正在测试的信标是以10Hz或更高的频率进行传输。这是因为500ms没有太多时间来检测数据包，当您在扫描打开和关闭之间循环时，无线电会关闭一段时间。我会让扫描周期更长（至少1100毫秒），以确定问题是否消失。
库2.10版中引入了一个错误，可能导致后台退出。我怀疑它会在如此短的扫描周期内解决问题。尝试定位库版本2.9，或者您可以使用instructions to try 2.11-beta1.

其他一些提示：

使用RegionBootstrap时没有理由调用bind（），如果这样做，可能会导致后台模式切换出现问题。您可以将自定义扫描周期代码放在您设置BeaconParser的位置旁边，然后只需将呼叫取出updateScanPeriods()，因为只有在扫描开始后更改扫描周期才需要它。
除非您激活BackgroundPowerSaver类或以编程方式更改beaconManager的后台模式，否则不会使用后台扫描周期。除非您执行其中一项操作，否则将始终使用前景扫描周期。

循环中的BootstrapNotifier回调

1 个答案: