我无法在 Android 中使用 AltbeaconLibrary 检测（监控）Ibeacon

Question

我有一个 android 应用程序。我的目的是使用 AltBeacon 库检测 Ibeacon。我使用了来自 AltBeacon 图书馆网站 Link: (http://altbeacon.github.io/android-beacon-library/samples.html) 的 监控示例代码 。但我无法检测到任何 Ibeacon。并且无法获取有关检测到任何信标的任何日志。

我的清单文件是这样的：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ibeaconscanner.ibeaconproject.ibeaconproject" >

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

我在 MainActivity.java 中添加了 Requesting Permission 代码来解决问题，但无法解决。我的 MainActivity.java 是这样的：

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

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (this.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("This app needs location acces");
                builder.setMessage("Please grat location acces so this app can detect beacons");
                builder.setPositiveButton(android.R.string.ok, null);
                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface dialogInterface) {
                        requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION);
                    }
                });
            }
        }

        setContentView(R.layout.activity_main);
        beaconManager = BeaconManager.getInstanceForApplication(this);
        beaconManager.bind(this);
    }

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

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

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

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

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

    @Override
    public void onRequestPermissionsResult(int requestCode,String permissions[], int[] grantResults) {
        switch (requestCode) {
            case PERMISSION_REQUEST_COARSE_LOCATION: {
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Log.d(TAG, "coarse location permission granted");
                } 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 when in the background.");
                    builder.setPositiveButton(android.R.string.ok, null);
                    builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                        @Override
                        public void onDismiss(DialogInterface dialogInterface) {

                        }
                    }
                    );
                    builder.show();
                }
                return;
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

几点提示：

确保您可以使用现成的信标检测应用程序检测您的信标，例如 Locate. 如果您看不到信标，则可能是硬件问题。
默认情况下，库仅检测发送 AltBeacon 格式的信标。如果您使用专有信标类型，则需要调用 beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("**PUT LAYOUT EXPRESSION HERE**")); 为您的信标类型添加布局。
如果您使用的是Android6，请确保您的应用已授予位置权限。转到设置 -> 应用程序 -> [您的应用程序名称] -> 权限，并确保授予位置权限。
如果您使用的是 Android6，请检查“设置”->“位置”是否设置为“开”。这对于包括 Nexus 5 在内的某些设备是必需的。
如果上述方法没有帮助，请尝试向您的应用程序添加日志记录（如 onBeaconServiceConnect()）并报告哪些方法被调用，哪些方法没有被调用。

Answer 2

要检测 iBeacon，您需要修改 altbeacon 库以使其理解 ibeacon 数据包格式。在 onCreate 函数中试试这个：

beaconManager = BeaconManager.getInstanceForApplication(this);
beaconManager.getBeaconParsers().clear();
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"));
        beaconManager.setForegroundScanPeriod(1000l);
        beaconManager.setForegroundBetweenScanPeriod(10000l);
        beaconManager.bind(this);

setBeaconLayout 定义检测 iBeacons 的数据包结构。可以详细了解包结构here.
setForegroundScanPeriod 在我的代码中设置为 1 秒，setForegroundBetweenScanPeriod 设置为 10 秒。您可以将其更改为您想要的任何值。您可能希望根据需要将 setForegroundBetweenScanPeriod 减少到 3 秒。基本上，这两个设置定义设备处于扫描模式 1 秒，并每 10 秒重复扫描一次。

更新

要显示检测到的信标的 UUID，请使用以下内容：

@Override
public void onBeaconServiceConnect() {

        beaconManager.setRangeNotifier(new RangeNotifier() {
        @Override
        public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
            if (beacons.size() > 0) {
                 for (Beacon beacon : beacons) {   
                      logToDisplay("Detected " + beacon.toString() + " with UUID " + beacon.getId1().toString() + " and Major ID " + beacon.getId2().toString() + " and Minor ID " + beacon.getId3().toString()); 
                }
            }
            else {
                logToDisplay("No iBeacons detected");
            }
        }

    });

    try {
        beaconManager.startRangingBeaconsInRegion(myRegion);
    } catch (RemoteException e) {   }

}

private void logToDisplay(final String line) {
    runOnUiThread(new Runnable() {
        public void run() {
            EditText editText = (EditText)RangingActivity.this.findViewById(R.id.rangingText);
            editText.append(line+"\n");
        }
    });
}

我无法在 Android 中使用 AltbeaconLibrary 检测（监控）Ibeacon

I cannot detect(monitoring) Ibeacon with using AltbeaconLibrary in Android

monitoring

android

detection

ibeacon-android

altbeacon