html5 geolocation gps sensor禁用while watchPosition（）

我在Andoid 2.3.3上測試地理定位腳本，但watchPosition（）處於活動狀態時gps傳感器禁用。html5 geolocation gps sensor禁用while watchPosition（）

我喜歡傳感器保持活躍，所以它在一秒鐘內更新。

這是一個android 2.3的問題或腳本中的錯誤？

<!DOCTYPE html> 
<html> 
    <head> 
    <style> 
     #tripmeter { 
     border: 3px double black; 
     padding: 10px; 
     margin: 10px 0; 
     } 

     p { 
     color: #222; 
     font: 14px Arial; 
     } 

     span { 
     color: #00C; 
     } 
    </style> 
    </head> 
    <body> 
    <div id="tripmeter"> 
     <p> 
     Starting Location (lat, lon):<br/> 
     <span id="startLat">???</span>&deg;, <span id="startLon">???</span>&deg; 
     </p> 
     <p> 
     Current Location (lat, lon):<br/> 
     <span id="currentLat">???</span>&deg;, <span id="currentLon">???</span>&deg; 
     </p> 
     <p> 
     Distance from starting location:<br/> 
     <span id="distance">0</span> km 
     </p> 
    </div> 
    <script> 
     window.onload = function() { 
     var startPos; 

     if (navigator.geolocation) { 
      navigator.geolocation.getCurrentPosition(function(position) { 
      startPos = position; 
      document.getElementById("startLat").innerHTML = startPos.coords.latitude; 
      document.getElementById("startLon").innerHTML = startPos.coords.longitude; 
      }, function(error) { 
      alert("Error occurred. Error code: " + error.code); 
      // error.code can be: 
      // 0: unknown error 
      // 1: permission denied 
      // 2: position unavailable (error response from locaton provider) 
      // 3: timed out 
      }, {enableHighAccuracy: true}); 

      navigator.geolocation.watchPosition(function(position) { 
      document.getElementById("currentLat").innerHTML = position.coords.latitude; 
      document.getElementById("currentLon").innerHTML = position.coords.longitude; 
      document.getElementById("distance").innerHTML = 
       calculateDistance(startPos.coords.latitude, startPos.coords.longitude, 
           position.coords.latitude, position.coords.longitude); 
      }, {enableHighAccuracy: true}); 
     } 
     }; 

     // Reused code - copyright Moveable Type Scripts - retrieved May 4, 2010. 
     // http://www.movable-type.co.uk/scripts/latlong.html 
     // Under Creative Commons License http://creativecommons.org/licenses/by/3.0/ 
     function calculateDistance(lat1, lon1, lat2, lon2) { 
     var R = 6371; // km 
     var dLat = (lat2-lat1).toRad(); 
     var dLon = (lon2-lon1).toRad(); 
     var a = Math.sin(dLat/2) * Math.sin(dLat/2) + 
       Math.cos(lat1.toRad()) * Math.cos(lat2.toRad()) * 
       Math.sin(dLon/2) * Math.sin(dLon/2); 
     var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
     var d = R * c; 
     return d; 
     } 
     Number.prototype.toRad = function() { 
     return this * Math.PI/180; 
     } 
    </script> 
    </body> 
</html>

來源

2013-01-11 Harry

更可能：這是一個電池保存問題。 – robertc

呃？但在谷歌地圖GPS保持住很長一段時間... – Harry

在谷歌地圖應用程序，或谷歌地圖的網站？ – robertc

通過在app中實現WebView中的html腳本解決。憑藉清單中的gps權限，傳感器仍然可用。

來源

2013-01-21 10:08:01 Harry

html5 geolocation gps sensor禁用while watchPosition（）

回答

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