问题
I want to implement a function that calculates locations' list (longitudes and latitudes) through a direction of my phone. The result can be a rectengular shape which is pointing the corners as locations.
First how can i find the device current direction which means which direction the back camera points ?
Then how can i obtain a list of location information through this direction ?
Thank you
回答1:
From the documentation of Google Maps Android API, the location data available to an Android device includes the current location of the device pinpointed using a combination of technologies - the direction and method of movement, and whether the device has moved across a predefined geographical boundary, or geofence.
This is the 3 options that you can do with your app.
Using My Location layer that provides a simple way to display the device's location on the map. It does not provide data.
Using Google Play services Location API is recommended for all programmatic requests for location data.
And using the LocationSource interface allows you to provide a custom location provider.
By using this, you can also get the different information about the coordinates that you get
For more information, check this tutorial:
Google Map Tutorial in Android Studio: How to get current location in Android Google Map
Google Map Tutorial in Android Studio
来源：https://stackoverflow.com/questions/38619091/getting-location-of-a-direction-of-current-location-in-android