Question about the Service Provider List for Location

Ferran_SIMON · March 6, 2024, 5:21pm

I have these questions about the Service Provider List for the Location Sensor:

Why have the List Providers Services the FUSED Provider Service as duplicate?
Why the GPS provider is near the end of the list? I think the order is important for eficiency. Is it right?
What Provider is better in-buildingand out-building?
Can anybody clarify it?
Thks

Taifun · March 6, 2024, 6:06pm

good question... sorry, I do not know...
the list is an unordered list...
try GPS for outside and fused for inside

Taifun

Ferran_SIMON · March 6, 2024, 6:13pm

For the point 2, do yoy knou the order that is acting?

Taifun · March 6, 2024, 6:53pm

it is unordered as far as I can see... but the order not really is important...
you could check the sources, if you want to know more

github.com

mit-cml/appinventor-sources/blob/master/appinventor/components/src/com/google/appinventor/components/runtime/LocationSensor.java

// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2022 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0

package com.google.appinventor.components.runtime;

import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.DesignerProperty;
import com.google.appinventor.components.annotations.PropertyCategory;
import com.google.appinventor.components.annotations.SimpleEvent;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.annotations.SimpleObject;
import com.google.appinventor.components.annotations.SimpleProperty;
import com.google.appinventor.components.annotations.UsesPermissions;
import com.google.appinventor.components.common.ComponentCategory;
import com.google.appinventor.components.common.PropertyTypeConstants;
import com.google.appinventor.components.common.YaVersion;
import com.google.appinventor.components.runtime.util.BulkPermissionRequest;

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Taifun

SteveJG · March 6, 2024, 7:13pm

Most 'accurate' coordinates are provided by gps subject to how many satellites are being used by the LocationSensor. Cell tower coordinates a much less reliable and may be what your device defaults to if you are inside a building with weak gps radio signals,
GPS uses satellites that orbit around the Earth to triangulate a user's location, whereas Wifi locating technology uses relative network signal strength gathered at network access points,
See Location without Google Services. These days you will rarely find an app… | by Todor Kostov | Medium

This link is a bit out of date but does discuss the issue
Android Location Providers (gps, network, passive) | developerlife.com.

fused uses either cell tower , wifi or gps info. You haven't any choice, your Android system decides. unless you set and lock a specific Provider using code.

No, that is incorrect. The most efficient is determined automatically using the fused Provider and cannot be circumvented unless the Provider is set and locked by a developer.

Ask Google how they determined this appears twice.