Android Geofence驻留时间未触发

Question

我最近更新了Google-Play-Service库，因为一些地理围栏和GCM所需的类已被删除/弃用。我已经从Creating and Monitoring Geofences下载了地理栅栏的示例代码

示例代码只监视入口和出口，我所做的是在我的IntentService中添加Geofence.GEOFENCE_TRANSITION_DWELL并设置游荡时间，我提供了逻辑来处理

geofenceTransition == Geofence.GEOFENCE_TRANSITION_DWELL

进入/退出时的Geofence工作正常，但Dwell_TIME未触发。我已将geofences设置为

mGeofenceList.add(new    Geofence.Builder().setRequestId(geo_cord.getJSONObject(i_arrcords).getString("store_id"))                         
.setCircularRegion(
                                           Double.valueOf(geo_cord.getJSONObject(i_arrcords).getString("lat")),
                                          Double.valueOf(geo_cord.getJSONObject(i_arrcords).getString("longtd")),
                                  Float.valueOf(geo_cord.getJSONObject(i_arrcords).getString("radius"))

                                )

.setExpirationDuration(Constants.NEVER_EXPIRE)
                                 .setLoiteringDelay(  Integer.valueOf(geo_cord.getJSONObject(i_arrcords).getString("dwelltime")) )  

.setTransitionTypes( Geofence.GEOFENCE_TRANSITION_ENTER |   
Geofence.GEOFENCE_TRANSITION_DWELL |        
Geofence.GEOFENCE_TRANSITION_EXIT)
.build());

我的意图服务为

GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
if (geofencingEvent.hasError()) {
String errorMessage = GeofenceErrorMessages.getErrorString(this,
geofencingEvent.getErrorCode());
Log.d(TAG, errorMessage);
return;
}

    // Get the transition type.
int geofenceTransition = geofencingEvent.getGeofenceTransition();        

if ((geofenceTransition == Geofence.GEOFENCE_TRANSITION_DWELL))
{
Log.d(app_tag,GeoStrings.geofence_transition_dwell);    
task_geo_dwell  task_geofence_d=new task_geo_dwell();
task_geofence_d.execute();
}

不幸的是，我在日志中没有得到任何输出，GEOFENCE_TRANSITION_DWELL也从未触发过。请帮帮我。提前谢谢你

Answer 1

仅当您进入地理围栏并在离开地理围栏之前使用setLoiteringDelay在那里停留设置的时间时，才会触发GEOFENCE_TRANSITION_DWELL。

另一点是，您必须将初始触发选项指定为GeofencingRequest.INITIAL_TRIGGER_DWELL和GeofencingRequest.INITIAL_TRIGGER_ENTER。检查下面的代码：

try {
        GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
        builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER |GeofencingRequest.INITIAL_TRIGGER_DWELL);

        final Geofence geofence= new Geofence.Builder()
                .setRequestId("geofence1")
                .setCircularRegion(lat, lng,radius)
                .setExpirationDuration(Geofence.NEVER_EXPIRE)
                .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER |
                        Geofence.GEOFENCE_TRANSITION_EXIT |
                        Geofence.GEOFENCE_TRANSITION_DWELL)
                .setLoiteringDelay(20000)
                .build();

        builder.addGeofence(geofence);
        LocationServices.GeofencingApi.addGeofences(
                mGoogleApiClient,
                builder.build(),
                getGeofencePendingIntent()
        ).setResultCallback(new ResultCallback<Status>() {
            @Override
            public void onResult(@NonNull Status status) {
                if (status.isSuccess())
                {

                    //do something to show geofence added success;

                }
            }
        });
    } catch (SecurityException securityException) {

    }

Answer 2

你能分享一下你创建geofence请求的代码吗？您还必须将初始触发器设置为驻留，如下所示：

GeofencingRequest getGeofencingRequest() {
    GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
    //triggers events only when the user stops for a defined duration within a geofence.
    builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_DWELL);
    builder.addGeofences(mGeofenceList);
    return builder.build();
}

geofence请求是addGeofences()接口的一个参数。例如：

LocationServices.GeofencingApi.addGeofences(
                     mGoogleApiClient,
                     getGeofencingRequest(),
                     getGeofencePendingIntent()
             );

Answer 3

我怀疑如果GEOFENCE_TRANSITION_ENTER或GEOFENCE_TRANSITION_EXIT已经被触发到相同的GeoFence对象，则GEOFENCE_TRANSITION_DWELL不会触发。