navigator.geolocation。getCurrentPosition在Android中总是会超时，直到GPS/Location关闭

app.controller('dashboard', function($scope){
    $scope.getPosition = function(position){
        $scope.acc = position.coords;
        $scope.lat = position.coords.latitude;
        $scope.lng = position.coords.longitude;
        $scope.$apply();
    };
    $scope.getPositionErr = function(error){
        alert('code: '    + error.code    + '\n' +
                  'message: ' + error.message + '\n');
    };
    navigator.geolocation.getCurrentPosition($scope.getPosition, $scope.getPositionErr, {maximumAge: 0, timeout: 6000, enableHighAccuracy:false});
});
app.controller('dashboard', function($scope){