Navis-cordova-background-geolocation NPM

Premium Version (iOS)

This repo hosts the iOS platform available in the Premium Version. Android functionality is available only in the Premium Version.

Background Geolocation

Cross-platform background geolocation module for Cordova with battery-saving "circular stationary-region monitoring" and "stop detection".

Home Settings

Follows the Cordova Plugin spec, so that it works with Plugman.

This plugin leverages Cordova/PhoneGap's require/define functionality used for plugins.

Installing the plugin

From master (latest, greatest.)

   cordova plugin add https://github.com/transistorsoft/cordova-background-geolocation-lt.git

Installing a tagged version.

This plugin has tagged stable versions. To install a particular version, append a version code to the github url prefixed by #.

    cordova plugin add <git.url>#0.6.0

npm.io

Using the plugin

The plugin creates the object window.BackgroundGeolocation. See API Documentation for details

Documentation

Example

////
// As with all Cordova plugins, you must configure within an #deviceready callback.
//
function onDeviceReady() {
    // Get a reference to the plugin.
    var bgGeo = window.BackgroundGeolocation;
    
    /**
    * This callback will be executed every time a geolocation is recorded in the background.
    */
    var callbackFn = function(location, taskId) {
        var coords = location.coords;
        var lat    = coords.latitude;
        var lng    = coords.longitude;
        
        // Simulate doing some extra work with a bogus setTimeout.  This could perhaps be an Ajax request to your server.
        // The point here is that you must execute bgGeo.finish after all asynchronous operations within the callback are complete.
        setTimeout(function() {
          bgGeo.finish(taskId); // <-- execute #finish when your work in callbackFn is complete
        }, 1000);
    };

    var failureFn = function(error) {
        console.log('BackgroundGeoLocation error');
    }

    // BackgroundGeoLocation is highly configurable.
    bgGeo.configure(callbackFn, failureFn, {
        // Geolocation config
        desiredAccuracy: 0,
        stationaryRadius: 50,
        distanceFilter: 50,
        disableElasticity: false, // <-- [iOS] Default is 'false'.  Set true to disable speed-based distanceFilter elasticity
        locationUpdateInterval: 5000,
        minimumActivityRecognitionConfidence: 80,   // 0-100%.  Minimum activity-confidence for a state-change 
        fastestLocationUpdateInterval: 5000,
        activityRecognitionInterval: 10000,
        stopDetectionDelay: 1,  // Wait x minutes to engage stop-detection system
        stopTimeout: 2,  // Wait x miutes to turn off location system after stop-detection
        activityType: 'AutomotiveNavigation',

        // Application config
        debug: true, // <-- enable this hear sounds for background-geolocation life-cycle.
        forceReloadOnLocationChange: false,  // <-- [Android] If the user closes the app **while location-tracking is started** , reboot app when a new location is recorded (WARNING: possibly distruptive to user) 
        forceReloadOnMotionChange: false,    // <-- [Android] If the user closes the app **while location-tracking is started** , reboot app when device changes stationary-state (stationary->moving or vice-versa) --WARNING: possibly distruptive to user) 
        forceReloadOnGeofence: false,        // <-- [Android] If the user closes the app **while location-tracking is started** , reboot app when a geofence crossing occurs --WARNING: possibly distruptive to user) 
        stopOnTerminate: false,              // <-- [Android] Allow the background-service to run headless when user closes the app.
        startOnBoot: true,                   // <-- [Android] Auto start background-service in headless mode when device is powered-up.
        
        // HTTP / SQLite config
        url: 'http://posttestserver.com/post.php?dir=cordova-background-geolocation',
        method: 'POST',
        batchSync: true,       // <-- [Default: false] Set true to sync locations to server in a single HTTP request.
        autoSync: true,         // <-- [Default: true] Set true to sync each location to server as it arrives.
        maxDaysToPersist: 1,    // <-- Maximum days to persist a location in plugin's SQLite database when HTTP fails
        headers: {
            "X-FOO": "bar"
        },
        params: {
            "auth_token": "maybe_your_server_authenticates_via_token_YES?"
        }
    });

    // Turn ON the background-geolocation system.  The user will be tracked whenever they suspend the app.
    bgGeo.start();

    // If you wish to turn OFF background-tracking, call the #stop method.
    // bgGeo.stop()
}

Help! It doesn't work!

Yes it does. See the Wiki

on iOS, background tracking won't be engaged until you travel about 2-3 city blocks, so go for a walk or car-ride (or use the Simulator with Debug->Location->City Drive)
When in doubt, nuke everything: First delete the app from your device (or simulator)

$ cordova plugin remove com.transistorsoft.cordova.background-geolocation
$ cordova plugin add git@github.com:transistorsoft/cordova-background-geolocation-lt.git

$ cordova platform remove ios
$ cordova platform add ios
$ cordova build ios

A fully-featured SampleApp is available in its own public repo. After first cloning that repo, follow the installation instructions in the README there. This SampleApp includes a settings-screen allowing you to quickly experiment with all the different settings available for each platform.

If you're using XCode, boot the SampleApp in the iOS Simulator and enable Debug->Location->Freeway Drive.

npm.io

Simple Testing Server

A simple Node-based web-application with SQLite database is available for field-testing and performance analysis. If you're familiar with Node, you can have this server up-and-running in about one minute.

npm.io

Behaviour

The plugin has features allowing you to control the behaviour of background-tracking, striking a balance between accuracy and battery-usage. In stationary-mode, the plugin attempts to descrease its power usage and accuracy by setting up a circular stationary-region of configurable #stationaryRadius.

iOS has a nice system Significant Changes API, which allows the os to suspend your app until a cell-tower change is detected (typically 2-3 city-block change)

Android automatically detects when the device is moving so has no need for a stationary-geofence.

The plugin will execute your configured callback provided to the #configure(callback, config) method. Both iOS & Android use a SQLite database to persist every recorded geolocation so you don't have to worry about persistence when no network is detected. The plugin provides a Javascript API to fetch and destroy the records in the database. In addition, the plugin has an optional HTTP layer allowing allowing you to automatically HTTP POST recorded geolocations to your server.

The function changePace(isMoving, success, failure) is provided to force the plugin to enter "moving" or "stationary" state.

iOS

The plugin uses iOS Significant Changes API, and starts triggering your configured callback only when a cell-tower switch is detected (i.e. the device exits stationary radius).

When the plugin detects the device has moved beyond its configured #stationaryRadius, it engages the native platform's geolocation system for aggressive monitoring according to the configured #desiredAccuracy, #distanceFilter. The plugin attempts to intelligently scale #distanceFilter based upon the current reported speed. Each time #distanceFilter is determined to have changed by 5m/s, it recalculates it by squaring the speed rounded-to-nearest-five and adding #distanceFilter (I arbitrarily came up with that formula. Better ideas?).

(round(speed, 5))^2 + distanceFilter

Licence

cordova-background-geolocation
Copyright (c) 2015, Transistor Software (9224-2932 Quebec Inc)
All rights reserved.
sales@transistorsoft.com
http://transistorsoft.com

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