CODEWITHSUNDEEP
javascriptandroidcordova
Alaattin KAYRAK
Alaattin KAYRAK

Reputation: 1124

Phonegap in Android onDeviceReady function

I am using phonegap in android development. I wrote that PoC, however I can not figure out why it does not change the latitude of profile variable. Actually 

alert(profile.latitude);

runs before the

geoCode.setLocation();

here is my code;

document.addEventListener("deviceready", onDeviceReady, false);

var profile = {
    name: "",
    id: "red",
    latitude: "xx",
    longtitude: "",
    setCoordinates: function (latit, longt) {
        this.latitude = latit;
        this.longtitude = longt;
    }
};

var geoCode = {
    onSuccess: function (position) {
        profile.latitude = position.coords.latitude;
    },

    onError: function (error) {
    },

    setLocation : function () {
        navigator.geolocation.getCurrentPosition(this.onSuccess, this.onError);
    }
};

// Wait for PhoneGap to load
//

function onDeviceReady() {

    geoCode.setLocation();
    //alert("2");
    alert(profile.latitude);
};

thanks in advance

Upvotes: 1

Views: 959

Answers (2)

Paul Beusterien
Paul Beusterien

Reputation: 29547

navigator.geolocation.getCurrentPosition is an asynchronous function. You need to do something like :

var geoCode = {


setLocation : function (callback) {

    onSuccess: function (position) {
       callback(position.coords.latitude);
    },

    onError: function (error) {
    },
    navigator.geolocation.getCurrentPosition(onSuccess, onError);
}

};

// Wait for PhoneGap to load
//

function onDeviceReady() {

    geoCode.setLocation(function(latitude) {
        alert(latitude);
    });
};

Upvotes: 1

Simon MacDonald
Simon MacDonald

Reputation: 23273

Quite simply it is because the call to navigator.geolocation.getCurrentPosition() is an asynchronous call. Thereby the execution of the program continues and you see the alert. Sometime after the alert is show the onSuccess call of your geoCode class is called updating the profile.latitude value.

Upvotes: 0

Related Questions