Ionic应用程序背景中的地理位置报告 [英] Geolocation reporting in Ionic app Background

问题描述

即使应用程序在后台处于休眠状态，我也打算让用户进行地理位置定位，并将其存储在数据库中.我正在使用katzer的Cordova背景插件，当我尝试访问 backgroundMode.onactivate 函数中的 navigator.geolocation.getCurrentPosition 时，什么也没有发生，而当我尝试传递硬编码值api时，数据存储在数据库中

I intend to get users geolocation even when the app sits dormant in the background and store the same in the database. I'm using katzer's Cordova Background Plug-in, When I try to access navigator.geolocation.getCurrentPosition inside backgroundMode.onactivate function, nothing happens, Whereas when I try passing hard coded values api is called, data is stored in database.

以下是我的代码

document.addEventListener('deviceready', function() {
    // Android customization
    cordova.plugins.backgroundMode.setDefaults({
        text: 'Doing heavy tasks.'
    });
    // Enable background mode
    cordova.plugins.backgroundMode.enable();

    // Called when background mode has been activated
    cordova.plugins.backgroundMode.onactivate = function() {
        console.log('inside background')

        a();
    }

    var a = function() {
        console.log('a called')
        navigator.geolocation.getCurrentPosition(function(pos) {

            console.log('inside navigate');
            var data = {
                Lati: '123456',
                Longi: '132456',
                //LoginID: JSON.parse(window.localStorage.getItem('LoginId'))
                EmpCode: localStorage.getItem('LoginId')
            };

            $http.post("https://app.sbismart.com/bo/ContactManagerApi/UpdateEmployeeLoc", data).success(function(rsdata, status) {
                console.log('inside rsdata');
                console.log(data.Lati + "," + data.Longi);
            })
        }, function(error) {
            alert('Unable to get location: ' + error.message);
        });
    }


}, false);

推荐答案

cordova.plugins.backgroundMode.onfailure = function(errorCode) {
console.log(errorCode)
};`

并检查其失败原因....然后，您再次需要在后台的超时功能中运行locationService函数，以获取有关位置的更新并从先前获得的位置检查位置.像这样...

and check as to why is it failing....then again u need to run the locationService function in a timeout function in the background to get updated about the location and check the location from previously got location. Something like this...

cordova.plugins.backgroundMode.onactivate = function () {
        setTimeout(function () {
           a();

        }, 5000);
    }

希望这会有所帮助.

这篇关于Ionic应用程序背景中的地理位置报告的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！