CODEWITHSUNDEEP
javaandroidgps
TomBomb
TomBomb

Reputation: 3296

Android Location.getAccuracy() returns 1

I'm trying to get my current GPS accuracy by using Location.getAccuracy(). However, this is returning 1 (or sometimes 2) which doesn't seem possible. Google maps is telling me my current location accuracy is 40 meters.

Any thoughts?

int accuracy = (int) loc.getAccuracy();
// This will give me accuracy = 1

Upvotes: 9

Views: 9085

Answers (4)

rindress
rindress

Reputation: 706

Is it possible that you are calling getAccuracy() on the LocationProvider and not the Location? From the docs:

public abstract int getAccuracy ()

Since: API Level 1 Returns a constant describing horizontal accuracy of this provider. If the provider returns finer grain or exact location, ACCURACY_FINE is returned, otherwise if the location is only approximate then ACCURACY_COARSE is returned.

Where ACCURACY_FINE and ACCURACY_COARSE are defined as:

public static final int ACCURACY_COARSE

Since: API Level 1 A constant indicating an approximate accuracy requirement

Constant Value: 2 (0x00000002)
public static final int ACCURACY_FINE

Since: API Level 1 A constant indicating a finer location accuracy requirement

Constant Value: 1 (0x00000001)

Upvotes: 3

Lasse
Lasse

Reputation: 56

I usually have 6-9 satelites visible (Scandinavia) and get around 2.0 meters for getAccuracy() - and it turns out, in practice, to be around +|- 40 cm accurate in reality.

Upvotes: 1

Andrey Novikov
Andrey Novikov

Reputation: 5593

40 meters looks more like cellular network accuracy, but not GPS.

Upvotes: 1

aioobe
aioobe

Reputation: 421040

From the documentation of getAccuracy:

Returns the accuracy of the fix in meters.

Why doesn't it seem possible? A return-value of 1, sometimes 2 meters, is perfectly fine for GPS. With a good signal strength, and locks on multiple satellites, you can get that kind of accuracy.

(Besides, since you're casting to an int your flooring the value. The accuracy may actually be for instance 1.9 meters.)

Upvotes: 8

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