我正在使用AltBEacon Android library为Android设备开发 iBeacon应用。我正在扫描信标，但是，只有发现四个信标中的两个（有时是1/4）。
我将mBeaconManager.setForegroundScanPeriod(5000l);增加到5秒，但结果仍然相同。我不确定我用于查看绑定详细信息的CustomAdapter是错误还是移动设备问题（我使用Galaxy Note II - Android 4.4.2（KitKat））？ 任何人都可以找到我的错误吗？
另一个问题是从设备到信标的距离计算返回不正确（当我距离大约0.5米时它返回3-6米之前）
我做错了什么？
注意：我已经检查了Beacon的UUID，Major，Minors是否有任何错误。我增加了扫描时间。这些都不起作用。
以下是开始监控和测距的片段：
public class FragmentScanBeacons extends Fragment implements BeaconConsumer{
public static Region mRegion = new Region("Server", Identifier.parse("Here is my UUID"), null, null);
private BeaconManager mBeaconManager;
private BeaconBaseAdapter beaconBaseAdapter;
private ListView beaconsListLv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBeaconManager = BeaconManager.getInstanceForApplication(getActivity());
//BEACON PARSER
mBeaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
//mBeaconManager.debug = true;
beaconBaseAdapter = new BeaconBaseAdapter(getActivity());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_beacons, container, false);
//UI
beaconsListLv = (ListView) view.findViewById(R.id.beaconsListView);
//Set Adapter
beaconsListLv.setAdapter(beaconBaseAdapter);
//Check for bluetooth and Scan for Beacon
verifyBluetooth();
//Start Monitoring and Ranging
mBeaconManager.bind(this);
return view;
}
@Override
public void onResume() {
super.onResume();
if(mBeaconManager.isBound(this)){
mBeaconManager.setBackgroundMode(false);
}
}
@Override
public void onPause() {
super.onPause();
if(mBeaconManager.isBound(this)){
mBeaconManager.setBackgroundMode(true);
}
}
@Override
public void onDestroy() {
super.onDestroy();
mBeaconManager.unbind(this);
}
@Override
public void onBeaconServiceConnect() {
try {
//Scan lasts for SCAN_PERIOD time
mBeaconManager.setForegroundScanPeriod(1000l);
//mBeaconManager.setBackgroundScanPeriod(0l);
//Wait every SCAN_PERIOD_INBETWEEN time
mBeaconManager.setForegroundBetweenScanPeriod(0l);
//Update default time with the new one
mBeaconManager.updateScanPeriods();
}
catch (RemoteException e){
e.printStackTrace();
}
//Set Monitoring
mBeaconManager.setMonitorNotifier(new MonitorNotifier() {
@Override
public void didEnterRegion(Region region) {
Log.d("TEST", "ENTERED beacon region");
//Start Raning as soon as you detect a beacon
try {
mBeaconManager.startRangingBeaconsInRegion(mRegion);
}
catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public void didExitRegion(Region region) {
Log.d("TEST", "EXITED beacon region");
}
@Override
public void didDetermineStateForRegion(int state, Region region) {
Log.d("TEST", "SWITCHED from seeing/not seeing beacon to state " + state);
}
});
//Set Ranging
mBeaconManager.setRangeNotifier(new RangeNotifier() {
@Override
public void didRangeBeaconsInRegion(final Collection<Beacon> beacons, Region region) {
if (beacons != null && beacons.size() > 0) {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
beaconBaseAdapter.initAll(beacons);
}
});
}
}
});
try {
//Start Monitoring
mBeaconManager.startMonitoringBeaconsInRegion(mRegion);
}
catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public Context getApplicationContext() {
return getActivity().getApplicationContext();
}
@Override
public void unbindService(ServiceConnection serviceConnection) {
getActivity().unbindService(serviceConnection);
}
@Override
public boolean bindService(Intent intent, ServiceConnection serviceConnection, int mode) {
return getActivity().bindService(intent, serviceConnection, mode);
}
}
以下是自定义适配器：
public class BeaconBaseAdapter extends BaseAdapter {
private Context myContext;
private LayoutInflater inflater;
public static ArrayList<Beacon> beacons;
public BeaconBaseAdapter(Context context) {
this.myContext = context;
this.inflater = LayoutInflater.from(context);
this.beacons = new ArrayList<Beacon>();
}
public void initAll(Collection<Beacon> newBeacons) {
this.beacons.clear();
this.beacons.addAll(newBeacons);
notifyDataSetChanged();
}
@Override
public int getCount() {
return beacons.size();
}
@Override
public Beacon getItem(int position) {
return beacons.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.beacon_list_row, null);
convertView.setTag(new ViewHolder(convertView));
}
bind(getItem(position), position, convertView);
return convertView;
}
private void bind(Beacon beacon, int position, View view) {
ViewHolder holder = (ViewHolder) view.getTag();
holder.manufacturerTextView.setText("Manufacturer: " + beacon.getManufacturer());
holder.idOneTextView.setText("UUID: " + beacon.getId1());
holder.idTwoTextView.setText("Major: " + beacon.getId2());
holder.idThreeTextView.setText("Minor: " + beacon.getId3());
holder.txPowerTextView.setText("TX-Power: " + beacon.getTxPower());
holder.rssiTextView.setText("RSSI: " + beacon.getRssi());
holder.distanceTextView.setText(String.format("DISTANCE: (%.2f m)", beacon.getDistance()));
holder.nameTextView.setText("Bluetooth Name: " + beacon.getBluetoothName());
holder.addressTextView.setText("Bluetooth Adrs: " + beacon.getBluetoothAddress());
}
static class ViewHolder {
final TextView nameTextView;
final TextView manufacturerTextView;
final TextView idOneTextView;
final TextView idTwoTextView;
final TextView idThreeTextView;
final TextView txPowerTextView;
final TextView rssiTextView;
final TextView distanceTextView;
final TextView addressTextView;
ViewHolder(View view) {
nameTextView = (TextView) view.findViewWithTag("name");
manufacturerTextView = (TextView) view.findViewWithTag("manufacturer");
idOneTextView = (TextView) view.findViewWithTag("id_one");
idTwoTextView = (TextView) view.findViewWithTag("id_two");
idThreeTextView = (TextView) view.findViewWithTag("id_three");
txPowerTextView = (TextView) view.findViewWithTag("tx_power");
rssiTextView = (TextView) view.findViewWithTag("rssi");
distanceTextView = (TextView) view.findViewWithTag("distance");
addressTextView = (TextView) view.findViewWithTag("address");
}
}
}
答案 0 :(得分：6)
一些想法：
尝试使用现成的信标检测程序，例如Locate，它使用相同的Android Beacon Library。如果程序可靠地检测到您的信标，则可能是您提到的自定义代码中的问题。
确保您的信标频繁传输。基线传输频率为10 Hz，但具有默认设置的磁带库将可靠地接收发送至少1 Hz的信标。如你所描述的那样增加mBeaconManager.setForegroundScanPeriod();应该会有所帮助，但如果信标只以0.1 Hz的频率传输，那么你仍然会遇到像你描述的那样的问题。
某些Android设备具有组合的Wi-Fi /蓝牙芯片，可防止这些无线电的可靠同时操作。尝试禁用Wi-Fi，看看是否得到相同的结果。
答案 1 :(得分：0)
public void initAll(Collection<Beacon> newBeacons) {
this.beacons.clear();
this.beacons.addAll(newBeacons);
}
我做了：
public void initAll(Collection<Beacon> newBeacons) {
this.beacons.clear();
this.beacons.addAll(newBeacons);
//Sort
Collections.sort(this.beacons, new Comparator<Beacon>() {
@Override
public int compare(Beacon b1, Beacon b2) {
String mac1 = b1.getBluetoothAddress();
String mac2 = b2.getBluetoothAddress();
return mac1.compareTo(mac2);
}
});
}