phonegap 地理定位总是在超时时失败

问题描述

我在我的应用中使用 sencha-touch 2.0 和 phonegap 2.0.0 来检索用户的位置.在我的 locahost 上运行时，一切正常.但是，当将 .apk 加载到我的 android 15 api 设备(使用 eclipse 和 adt 插件)时，每次调用 getCurrentLocation 或 watchPosition 都不会返回...

I'm using sencha-touch 2.0 and phonegap 2.0.0 in my app to retrieve user's location. When runing on my locahost, everything works just fine. However, when loading the .apk to my android 15 api's device (using eclipse and the adt plugin), every call to getCurrentLocation or watchPosition never returns...

这是我的代码:

geoOn: function(){
    var geoReady = navigator.geolocation || undefined;

    var onSuccess = function(position){
            Top5.app.alert('Geolocation success '+String(position.coords.latitude) + ' ' + String(position.coords.longitude),'Geolocation');
            var scope = Ext.getCmp('nestedList');
            scope.updateDistance(position.coords);
    };

    var onFailure = function(error){Top5.app.alert('Geolocation failed: '+String(error.code) + ' '+String(error.message),'Geolocation');};
    if (geoReady) {
        this.watchId = navigator.geolocation.watchPosition(onSuccess ,onFailure,{timeout:6000,maximumAge: 3000,enableHighAccuracy: true});    
    }
    else{
        Ext.device.Geolocation.watchPosition({
                 frequency: 3000, // Update every 3 seconds
                 callback: function(position) {
                        this.updateDistance(position.coords);
                 },
                 failure: function() {
                   console.log('Geolocation Failure!');
                 },
                 scope:this
        });
    }
 },
 geoGet: function(){
     var geoReady = navigator.geolocation || undefined;
     if (geoReady) {

         var onSuccess = function(position){
             Top5.app.alert('Geolocation successful!!!');
             var scope = Ext.getCmp('nestedList');
             scope.updateDistance(position.coords);          
         };
         var onFailure = function(error){Top5.app.alert('Geolocation failed: '+String(error.code) + ' '+String(error.message),'Geolocation');};
         navigator.geolocation.getCurrentPosition(onSuccess,onFailure);
     }
     else{}
 },
 geoOff:function(){

     var geoReady = navigator.geolocation || undefined;
     if (geoReady) {
         navigator.geolocation.clearWatch(this.watchId);
         this.watchId = null;
     }
     else{
         Ext.device.Geolocation.clearWatch();
     }

 },
 updateDistance:function(coords){
     Top5.app.alert('updateDist','');
     var scope = Ext.getCmp('nestedList');
     var lat = coords.latitude,lon = coords.longitude;
     var store = scope.getStore();
     var i,record;
     for(i = 0; i < store.data.all.length; i++)
     {
         record = store.data.all[i];
         if(record.data.locationX){
            record.set('distance',Top5.app.getDistance(record.data.locationX,record.data.locationY,lat,lon).toFixed(3));
         }   
     }
}

更新:所以我走出了我的大楼，它奏效了……我需要更频繁地出去.
但是，当我禁用 gps 时，我认为 geoLocation 会使用 wifi 连接找到我的位置 - 但它失败了(我设置了 enableHighAccuracy: false).这是为什么?

UPDATE: So I walked out of my building and it worked... I need to go outside more often.
However, when I'm disabling the gps, I thought geoLocation will find my location using wifi connection - but it failes (I'm setting enableHighAccuracy: false). Why is that?

更新:让我重新表述我的问题:navigator.geolocation.watchPosition 是否假设同时使用 GPS 信号和 wifi/g3 信号?如何仅使用互联网连接检测用户位置?目前，我的代码仅适用于 GPS，当该选项被禁用或信号被阻止时，地理定位不起作用.

UPDATE: Let me rephrase my question: Does navigator.geolocation.watchPosition suppose to work both with GPS signal and wifi/g3 signals? How can I detect user location using internet connection only? currently, my code is working only with GPS, and when that option disabled or signal is blocked, geolocation isn't working.

推荐答案

我已经设法解决了.... 但是，我不知道是什么真正解决了它.我所做的就是改变我的模型结构之一.谁能看到与地理定位的联系?

I've managed to work it out.... However , I have no idea what actually solved it. All I've done is to change one of my model's structure. Can anyone see the connection to geolocation?

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