geolocation

I'm currently doing a hybrid app using ionic/cordova. The app needs functionality where it pings our backend with its location every 1 minute or so and the backend API will answer if anything interesting is nearby. If the answer is yes the app will queue a local notification which hopefully will make the user open the app. This functionality is needed when the app is in background mode and even when the phone is locked. The app needs to be able to be deployed to both app store, google play and eventually windows phone. I'm currently using a combination of these three plugins: https://www.npmjs

I don't know how to get the location (GPS/Network when taking a photo) in Android. Any suggestion and code samples are welcomed. I haven't used until now the Location services, I have tried in many ways but I can't get it to work. Here is my image capturing activity: public class ImageCaptureActivity extends Activity { // Activity request codes private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100; public static final int MEDIA_TYPE_IMAGE = 1; Context context = null; // directory name to store captured images private static final String IMAGE_DIRECTORY_NAME = "Asisoft"; private Uri

I have an SQLite database, which does not support trig functions. I would like to sort a set of lat,lng pairs in my table by distance as compared to a second lat,lng pair. I'm familiar with the standard haversine distance formula for sorting lat,lng pairs by distance. In this case I don't care particularly for precision, my points are separated by large distances, so I don't mind rounding off the distances by treating curves as straight lines. My question, is there a generally accepted formula for this kind of query? Remember no trig functions! If your points are within reasonable distance of