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android - AltBeacon 看不到 eddystone 设备

问题描述

大家好，我使用 Android API 使用信标已经有一段时间了，我能够检测到我所有的信标，其中一个是在 URL 中设置的 Eddystone，实际上图书馆'com.neovisionaries:nvbluetooth:1.8'可以识别它。但是当使用 AltBeacon 库时，没有找到任何设备，甚至没有找到我为其设置解析器的 Eddystone

public class MainActivity extends Activity implements BeaconConsumer {

protected static final String TAG = "MonitoringActivity";
private BeaconManager beaconManager;

private static final int PERMISSION_REQUEST_FINE_LOCATION = 1;
private static final int PERMISSION_REQUEST_BACKGROUND_LOCATION = 2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    checkLocationPermission();
    beaconManager = BeaconManager.getInstanceForApplication(this);
    // Detect the main identifier (UID) frame:
    beaconManager.getBeaconParsers().add(new BeaconParser().
            setBeaconLayout(BeaconParser.EDDYSTONE_UID_LAYOUT));
    // Detect the telemetry (TLM) frame:
    beaconManager.getBeaconParsers().add(new BeaconParser().
            setBeaconLayout(BeaconParser.EDDYSTONE_TLM_LAYOUT));
    // Detect the URL frame:
    beaconManager.getBeaconParsers().add(new BeaconParser().
            setBeaconLayout(BeaconParser.EDDYSTONE_URL_LAYOUT));


    beaconManager.bind(this);
}

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

@Override
public void onBeaconServiceConnect() {
    beaconManager.removeAllMonitorNotifiers();
    beaconManager.addMonitorNotifier(new MonitorNotifier() {
        @Override
        public void didEnterRegion(Region region) {
            Log.i(TAG, "I just saw an beacon for the first time!");
        }

        @Override
        public void didExitRegion(Region region) {
            Log.i(TAG, "I no longer see an beacon");
        }

        @Override
        public void didDetermineStateForRegion(int state, Region region) {
            Log.i(TAG, "I have just switched from seeing/not seeing beacons: "+state);
        }
    });

    try {
        beaconManager.startMonitoringBeaconsInRegion(new Region("myMonitoringUniqueId", null, null, null));
    } catch (RemoteException ignored) {    }
}

private void checkLocationPermission() {
    if (this.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)
            == PackageManager.PERMISSION_GRANTED) {
        if (this.checkSelfPermission(Manifest.permission.ACCESS_BACKGROUND_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            if (this.shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_BACKGROUND_LOCATION)) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("This app needs background location access");
                builder.setMessage("Please grant location access so this app can detect beacons in the background.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(dialog ->
                        requestPermissions(new String[]{Manifest.permission.ACCESS_BACKGROUND_LOCATION},
                                PERMISSION_REQUEST_BACKGROUND_LOCATION));
                builder.show();
            } else {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("Functionality limited");
                builder.setMessage("Since background location access has not been granted, this app will not be able to discover beacons in the background.  Please go to Settings -> Applications -> Permissions and grant background location access to this app.");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(dialog -> {});
                builder.show();
            }

        }
    } else {
        if (!this.shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)) {
            requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION,
                            Manifest.permission.ACCESS_BACKGROUND_LOCATION},
                    PERMISSION_REQUEST_FINE_LOCATION);
        } else {
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("Functionality limited");
            builder.setMessage("Since location access has not been granted, this app will not be able to discover beacons.  Please go to Settings -> Applications -> Permissions and grant location access to this app.");
            builder.setPositiveButton(android.R.string.ok, null);
            builder.setOnDismissListener(dialog -> {});
            builder.show();
        }
    }
}

代码直接从示例代码中复制而来，我添加的唯一新checklocation功能是我添加的功能，用于解决仅使用清单时手机没有正确授予我权限的问题（正如我在使用原始文件时发现的那样蜜蜂）

也作为额外信息：我的构建文件设置如下：minSdkVersion 24 targetSdkVersion 30

知道为什么我的代码不起作用吗？

谢谢

编辑来自https://altbeacon.github.io/android-beacon-library/detection-trouble.html的额外信息

  1. NRF 发现信标为 Eddystone V3.0
  2. 该Checkbluetooth函数正是这样做的，我确认它正确地获得了权限（基于我使用 android API 构建的并行应用程序）
  3. 是（见上文）
  4. 是的（见上面的代码）
  5. 是的
  6. 是的
  8. 不是三星，是 BLU Grand M2

标签： androidbeaconaltbeacon

解决方案

显然代码有效，关闭手机然后重新打开它不知道为什么会这样

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