使用Google API的Android室内指南

Question

I currently have an app which displays a map fragment and can display navigation to a given point. The indoor maps is enabled and the building I'm trying to use does have indoor maps, but it only navigates to outside the building even when the transport mode is set to walking.

Is there currently any way to do this?

Answer 1

It seems that the Google Maps Android API does not support this feature for now. Even if you select the correct travel mode , which should be walking, the route is traced on the nearest road and not on the indoor path.

I'm also waiting for this option to be released, since it is currently possible to get this outcome using Google's own Maps web app.

Answer 2

My graduate project is about indoor positioning when GPS is not available in android. The answer is yes, but there is not easy way. Hard way to do this but accuracy not good as good the GPS. There are two main approach to get location.

Approaches

1. Sensor-Fusion: This method for the get relative location. Using built-in sensors (gyroscope, accelerometer, compass) calculate the distance & direction over time. So you get the new location adding this value to old location. It also called dead-reckoning .

2. Wi-fi Signal Strength: If there are two or more ap which locations are known before, use the signal strengths to estimate your location. This idea a bit similar to how GPS works.

Weak Sides

1. Sensor-Fusion: Calculating new location error(e0) occur. When calculating next new location new error(e1) occurs again. So you get new location with e0+e1. I mean error groves exponentially over time.

2. Wi-fi Signal Strength: Some items can block the ap So you get weak signal strength and calculate wrong location.

Finally I use first approach for short time(10sec). Second approach to correct location(every 10sec). So you get the best results for long & short time.

Source

• Deeper explaination at this pdf .
• open source android app using first approach .