LocationRequest最小位移和准确性

问题描述

我正在构建一个Android应用，我需要以非常高的频率获得非常准确的位置。
我在Google Play服务api中寻找位置，并发现LocationRequest.setSmallestDisplacement对于限制电池消耗非常有用。然而，当我在室内测试它时，我得到的地点的准确度有很大的不同（有时候是10米，有时候是96米......），即使我将我的请求的优先级设置为高精度。

我的问题是setSmallestDisplacement没有提供最后返回的准确性。
所以如果我的位置精确度很低，我仍然需要走我的最小位移距离来获得一个新位置，希望更准确。

我想知道是否有办法避免这样的数据（我不能使用不够准确的位置），或者如果我不得不跳过setSmallestDisplacement部分（对电池消耗不好）。

您的快乐代码：

  mLocationRequest = LocationRequest.create（）; 
 mLocationRequest.setInterval（100）; //我们每100ms获得一个新位置
 //mLocationRequest.setSmallestDisplacement(5）; //但是只有当我们走过5m 
mLocationRequest.setPriority（LocationRequest.PRIORITY_HIGH_ACCURACY）; 
  

谢谢。

解决方案

LocationRequest.setSmallestDisplacement对于准确性无关紧要，只是为了避免不必要的更新，您可以继续使用它。

没有方法来提高准确性，如果您对低准确度的头寸没有兴趣，只需跳过这个位置并等待更好的头寸就可以得到一个准确的点（好或坏）。

本页面可以帮助您了解准确度和消耗量，但请记住没有完美的准确度，Wi-Fi准确度为100m，准确度更差。

在这里你有每个优先级的准确性。

这里来自Google工程师的IO Session， ry很有用，您也可以在那里获得PDF。

更新的链接brokens

$ b

希望这有助于：D 。

I'm building an Android app in which I need to have a very accurate location at a very high frequency.I dove into google play services api for location, and found the LocationRequest.setSmallestDisplacement very useful to limit battery consumption.

However, as I am testing it indoor, the locations I get have an accuracy that varies a lot (sometimes 10m, sometimes 96m...), even when I set the Priority of my request as high accuracy.

My prob1em is that setSmallestDisplacement doesn't give a sh*it about the accuracy that is returned last.So if I get a location with a very low accuracy, I will still have to walk my "smallest displacement" distance to get a new one, hopefully more accuracte.

I wonder if there is a way to avoid such data (I can't use location that are not accurate enough) or if I have to skip the setSmallestDisplacement part (bad for battery consumption).

Some code for your pleasure:

mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(100); //We get a new location every 100ms or so
//mLocationRequest.setSmallestDisplacement(5);  //but only if we traveled 5m
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

Thanks.

解决方案

The "LocationRequest.setSmallestDisplacement" doesn't matter for accuracy, it's just to avoid unnecessary updates, you can continuing using that.

There is no method to enhance low accuracy, you just get a point with some accuracy (better or worse), if you are not interested on positions with low accuracy just skip this location and wait for a better one.

This page could help you about accuracy and consumption, but take in mind no perfect accuracy exist, with Wi-Fi the accuracy is 100m for worse accuracy.

Here you have the accuracy for each priority.
https://developer.android.com/training/location/receive-location-updates.html#location-request

Here the IO Session from Google engineers, very useful, you can get the PDF there too.

Updated Links brokens

The PDF Presentation

The IO session

Hope this helps :D.

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