android - 位置服务关闭和打开时地理定位不起作用

Question

我有一个通过单击按钮触发的功能来检查地理位置。本地理位置打开时，它在手机上工作正常，当关闭时，如预期的那样显示一条消息。问题发生在首先关闭手机的定位服务，单击按钮(按预期弹出消息)，然后如果用户在应用程序仍处于打开状态时重新打开定位服务，然后再次单击按钮，仍然是一样的弹出“无位置服务”消息。

有没有办法在每次点击按钮时检查手机的定位服务是打开还是关闭？在 Android 和 IOS 上获得相同的结果。

代码:

$(document).ready(function () {

    $('#smallScreenGeolocate').on('click', function(){

     getCurrentLocation();
     });
});

function getCurrentLocation () {
if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(addGeolocationMarker, locationError);
    return true;
}
else {
    alert("Browser doesn't support Geolocation. Visit http://caniuse.com to discover browser support for the Geolocation API.");
    return false;
}
}

Answer 1

从另一个 SO 帖子中检查这个答案 https://stackoverflow.com/a/14862073/6539349

您必须按照此处的建议检查错误是什么 http://www.w3schools.com/html/html5_geolocation.asp

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showPosition,showError);
    } else {
        x.innerHTML = "Geolocation is not supported by this browser.";
    }
}

function showPosition(position) {
   x.innerHTML = "Latitude: " + position.coords.latitude +
   "<br>Longitude: " + position.coords.longitude;
}

The second parameter showError of the getCurrentPosition() method is used to handle errors. It specifies a function to run if it fails to get the user's location:

function showError(error) {
    switch(error.code) {
        case error.PERMISSION_DENIED:
            x.innerHTML = "User denied the request for Geolocation."
            break;
        case error.POSITION_UNAVAILABLE:
            x.innerHTML = "Location information is unavailable."
            break;
        case error.TIMEOUT:
            x.innerHTML = "The request to get user location timed out."
            break;
        case error.UNKNOWN_ERROR:
            x.innerHTML = "An unknown error occurred."
            break;
    }
}