安卓灯塔库检测iBeacon失败！不公平:(

Question

我尝试使用来检测iBeacons，但是它不起作用。

logcat输出的内容如下：

I/SELinux﹕ Function: selinux_android_load_priority [0], There is no sepolicy file. I/SELinux﹕ Function: selinux_android_load_priority , spota verifySig and checkHash pass. priority version is VE=SEPF_GT-I9195_4.4.2_0046 I/SELinux﹕ selinux_android_seapp_context_reload: seapp_contexts file is loaded from /data/security/spota/seapp_contexts E/dalvikvm﹕ >>>>> Normal User E/dalvikvm﹕ >>>>> com.cyberland.felix.ibeaconexample [ userId:0 | appId:10176 ] D/dalvikvm﹕ Late-enabling CheckJNI I/PersonaManager﹕ getPersonaService() name persona_policy D/BeaconParser﹕ Parsing beacon layout: m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25 D/BeaconParser﹕ Parsing beacon layout: m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24 W/ModelSpecificDistanceCalculator﹕ Cannot find match for this device. Using default W/ModelSpecificDistanceCalculator﹕ Cannot find match for this device. Using default E/MonitoringStatus﹕ Deserialization exception, message: $s

然后.

D/BluetoothAdapter﹕ stopLeScan()

一次又一次..。

我刚刚从“官方”页面修改了这个示例：

public class MainActivity extends Activity implements BeaconConsumer {
protected static final String TAG = "MainActivity";
private BeaconManager beaconManager;
private static final int PERMISSION_REQUEST_COARSE_LOCATION = 1;

private BluetoothAdapter mBluetoothAdapter;



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

    /*
    mBluetoothAdapter = ((BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE)).getAdapter();
    mBluetoothAdapter.startLeScan(new BluetoothAdapter.LeScanCallback() {
        @Override
        public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
            Log.d(TAG, "Scanned BLE device with mac: " + device.getAddress());
        }
    });
     */
    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.bind(this);




}


@Override
protected void onDestroy() {
    super.onDestroy();
    beaconManager.unbind(this);

}


@Override
public void onBeaconServiceConnect() {
    beaconManager.setRangeNotifier(new RangeNotifier() {
        @Override
        public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
            if (beacons.size() > 0) {
                Log.i(TAG, "The first beacon I see is about " + beacons.iterator().next().getDistance() + " meters away.");
            }
        }
    });

    try {
        beaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", null, null, null));
    } catch (RemoteException e) {    }
}

我希望你能帮我！

向你问好，费利克斯

Answer 1

看起来，这个问题可能与在您的设备上进行扫描时没有授予的适当权限有关。为了测试这一理论，请将以下代码添加到主活动的onCreate方法中，并查看它返回的内容。下面是我在我的Nexus5X上看到的一个示例输出。

        try {
            PackageInfo info = getPackageManager().getPackageInfo(this.getPackageName(), PackageManager.GET_PERMISSIONS);
            Log.d(TAG, "SDK "+Build.VERSION.SDK_INT+" App Permissions:");
            if (info.requestedPermissions != null) {
                for (String p : info.requestedPermissions) {
                    int grantResult = this.checkPermission(p, android.os.Process.myPid(), android.os.Process.myUid());
                    if (grantResult == PackageManager.PERMISSION_GRANTED) {
                        Log.d(TAG, p+" PERMISSION_GRANTED");
                    }
                    else {
                        Log.d(TAG, p+" PERMISSION_DENIED: "+grantResult);
                    }
                }
            }
        } catch (Exception e) {
            Log.d(TAG, "Cannot get permissions due to error", e);
        }

示例输出：

04-17 12:04:01.943 30624-30624/? D/MonitoringActivity: SDK 23 App Permissions:
04-17 12:04:01.944 30624-30624/? D/MonitoringActivity: android.permission.INTERNET PERMISSION_GRANTED
04-17 12:04:01.945 30624-30624/? D/MonitoringActivity: android.permission.BLUETOOTH PERMISSION_GRANTED
04-17 12:04:01.945 30624-30624/? D/MonitoringActivity: android.permission.BLUETOOTH_ADMIN PERMISSION_GRANTED
04-17 12:04:01.946 30624-30624/? D/MonitoringActivity: android.permission.RECEIVE_BOOT_COMPLETED PERMISSION_GRANTED
04-17 12:04:01.946 30624-30624/? D/MonitoringActivity: android.permission.ACCESS_COARSE_LOCATION PERMISSION_GRANTED

如果您发现设备上的输出缺少上述任何权限，则解决方案可能是手动将ACCESS_COARSE_LOCATION位置权限添加到AndroidManifest.xml中。如果您看到的是PERMISSION_DENIED，这可能是一个不同的问题。在启动设备上的信标扫描之前，您可以跳过权限检查，这可以通过将您的的版本暂时降级到2.7 (不进行此检查)来实现。

Answer 2

Hm，官方例子(android-信标-库-引用)产生了相同的输出。我无法解释。