设备进入某个位置时没有触发地理围栏

Posted 2023-04-14

【中文标题】设备进入某个位置时没有触发地理围栏

【英文标题】：Geofence isn't triggering when device enters a location

【发布时间】：2019-09-19 20:43:03

【问题描述】：

我正在尝试创建地理围栏，然后在用户进入或退出某个位置时执行一些操作（例如显示通知、静音移动）。

按照本指南https://developer.android.com/training/location/geofencing.html#HandleGeofenceTransitions

虽然正在创建地理围栏，但当设备进入该位置时没有任何反应（控制不会转到 GeofenceTrasition.class），即使它执行了 geoFenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER 也不会执行

我检查了以前的问题和指南，但没有任何帮助我也浏览了 github（不正确理解该代码）

地理围栏的 MapsActivity 代码

私有 void buildGeofence() Log.d(TAG, "buildGeofence: BuilderExecuted");

    mGeofenceList.add(new Geofence.Builder()
            .setRequestId("A1")
            .setCircularRegion(address.getLongitude(), address.getLatitude(), GEOFENCE_RADIUS_IN_METERS)
            .setExpirationDuration(Geofence.NEVER_EXPIRE)
            .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER | Geofence.GEOFENCE_TRANSITION_EXIT)
            .build());


    System.out.println("Longitude is " + address.getLongitude() + "Latitude is" + address.getLatitude());

    mGeofencingClient.addGeofences(getGeofencingRequest(), getGeofencePendingIntent())
            .addOnSuccessListener(new OnSuccessListener<Void>() 
                @Override
                public void onSuccess(Void aVoid) 
                    Log.d(TAG, "onSuccess: GeoFencing Successful");
                
            )
            .addOnFailureListener(new OnFailureListener() 
                @Override
                public void onFailure(@NonNull Exception e) 
                    Log.d(TAG, "onFailure: GeoFencing UnSuccessful");
                
            );


Circle geofenceLimits;
public void addGeofenceCircle()

    CircleOptions circleOptions = new CircleOptions()
            .center(m1.getPosition())
            .strokeColor(Color.argb(50,70,70,70))
            .fillColor(Color.argb(100,150,150,150))
            .radius(GEOFENCE_RADIUS_IN_METERS);

    geofenceLimits = mMap.addCircle(circleOptions);


private GeofencingRequest getGeofencingRequest() 
    Log.d(TAG, "getGeofencingRequest: Geofencing request executed");

    GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
    builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
    builder.addGeofences(mGeofenceList);
    return builder.build();


private PendingIntent getGeofencePendingIntent() 

    if (mGeofencePendingIntent != null) 
        return mGeofencePendingIntent;
    
        Log.d(TAG, "getGeofencePendingIntent: Geofencing intenet executed");
        Intent Intent = new Intent(this, GeofenceTransition.class);
        mGeofencePendingIntent = PendingIntent.getService(MapsActivity.this, 0, Intent, PendingIntent.
                FLAG_UPDATE_CURRENT);

    return mGeofencePendingIntent;

类来处理意图并判断设备是在地理围栏内部还是外部 公共类 GeofenceTransition 扩展 IntentService

private static final String TAG = "GeofenceIntent";
public static final int GEOFENCE_NOTIFICATION_ID = 0;

public GeofenceTransition() 
    super("GeofenceTransition");


@Override
protected void onHandleIntent(Intent intent) 
    Log.d(TAG, "onHandleIntent: Executed");

    GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);

    if (geofencingEvent.hasError()) 

        String error = String.valueOf(geofencingEvent.getErrorCode());
        Toast.makeText(getApplicationContext(), "Error = " + error, Toast.LENGTH_SHORT).show();
        Log.e(TAG, "onHandleIntent: Intent Error");
        return;
    

    int geoFenceTransition = geofencingEvent.getGeofenceTransition();
    int i=geoFenceTransition;
    System.out.println(i);

    System.out.println("Checking Geofence Transition");

    if (geoFenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER ||
            geoFenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT) 

        Log.d(TAG, "onHandleWork: Enter/Exit Works");
        Toast.makeText(getApplicationContext(), "WORKING", Toast.LENGTH_SHORT).show();


    

【参考方案1】：

我很笨，所以我将地理围栏的经度和纬度设置为： .setCircularRegion(address.getLongitude(), address.getLatitude(), GEOFENCE_RADIUS_IN_METERS)

虽然第一个值是纬度，第二个是经度，但正确的实现应该是： .setCircularRegion(address.getLatitude(), address.getLongitude(), GEOFENCE_RADIUS_IN_METERS)