情况如下：
当用户创建地理围栏时，我将其保存到后端并向操作系统注册地理围栏。但是每当我的应用程序重新启动时，我都会从后端获取地理围栏并再次在操作系统中重新注册它们，因为它们不断消失。
我有两节课MainActivity and FormActivity。这两个活动都注册地理围栏，因此我将实际注册提取到普通 POJOGeofences.java
问题是这样的：
现在奇怪的是，只有当地图活动出现在屏幕上时才会收到触发器。我的应用程序中确实有一个地图活动，但它甚至不必是我的地图活动，即使我启动谷歌地图地理围栏触发器开始触发。
我究竟做错了什么？
地理围栏.java：
public class Geofences {
private final String TAG = Geofences.class.getSimpleName();
private final float RADIUS = 150.0F; //meter
private boolean success = false;
private final int LOITERING_IN_MILLISECONDS = 30000;// 30 seconds
public boolean doGeofenceStuff(GeoTemp newTemp, String geofenceId, PendingIntent pendingIntent, GeofencingClient geofencingClient) {
Geofence geofence = createGeofence(newTemp, geofenceId);
GeofencingRequest geofencingRequest = createGeofenceRequest(geofence);
geofencingClient.addGeofences(geofencingRequest, pendingIntent)
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
success = true;
Log.i(TAG, "onComplete: DEBUG-Message: Geofence has been added.");
} else {
success = false;
Log.i(TAG, "onComplete: Geofence could not be added");
}
}
}); // handle error here
return success;
}
// Create a Geofence
private Geofence createGeofence(GeoTemp geoTemp, String geofenceId) {
long expiration = getExpirationForCurrentGeofence();
if (expiration < 1) {
Log.e(TAG, "createGeofence: Can't create Geofence, since expiration is less than zero");
return null;
}
Log.d(TAG, "createGeofence");
return new Geofence.Builder()
.setRequestId(geofenceId)
.setCircularRegion(getLat(), getLong(), RADIUS)
.setExpirationDuration(expiration)
.setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER | Geofence.GEOFENCE_TRANSITION_DWELL | Geofence.GEOFENCE_TRANSITION_EXIT)
.setLoiteringDelay(LOITERING_IN_MILLISECONDS)
.build();
}
// Create a Geofence Request
private GeofencingRequest createGeofenceRequest(Geofence geofence) {
Log.d(TAG, "createGeofenceRequest");
return new GeofencingRequest.Builder()
.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_DWELL)
.addGeofence(geofence)
.build();
}
}
这个POJOGeofences.java然后被我的两个活动使用：
主要活动：
public class MainActivity extends AppCompatActivity {
private static String TAG = "MainActivity";
private final int GEOFENCE_REQ_CODE = 0;
private GeofencingClient geofencingClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
geofencingClient = LocationServices.getGeofencingClient(this);
getCurrentTemps();
}
private void refreshGeofence(GeoTemp temp, String id) {
new Geofences().doGeofenceStuff(temp, id, createGeofencePendingIntent(), geofencingClient);
}
private void getCurrentTemps() {
List<GeoTemp> currentGeofences = getUpdatedList();
currentGeofences.forEach(geoTemp -> {
refreshGeofence( geoTemp, id);
});
}
private PendingIntent createGeofencePendingIntent() {
Log.d(TAG, "createGeofencePendingIntent");
Intent intent = new Intent(this, LocationAlertIntentService.class);
return PendingIntent.getService(
this, GEOFENCE_REQ_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}
}
还有一项活动使用 Geofences.java 向操作系统注册地理围栏。
Update:
我发现，如果任何其他应用程序（包括我的）请求位置锁定，地理围栏会触发火灾。我需要他们在后台开火。
