phonegap: how to check if gps is enabled

I want to show an alert saying that "Please turn on your GPS".

How can I get GPS status using phonegap?

I have used following code but I don't get any alert message if GPS is turned off. Instead nothing happens.

<!DOCTYPE html>
  <html>
  <head>
   <title>Device Properties Example</title>

<script type="text/javascript" charset="utf-8" src="cordova.js"></script>
<script type="text/javascript" charset="utf-8">

// Wait for device API libraries to load
//
document.addEventListener("deviceready", onDeviceReady, false);

// device APIs are available
//
function onDeviceReady() {

   var test= navigator.geolocation.getCurrentPosition(onSuccess, onError);

}

// onSuccess Geolocation
//
function onSuccess(position) {
    var element = document.getElementById('geolocation');
    element.innerHTML = 'Latitude: '           + position.coords.latitude              + '<br />' +
                        'Longitude: '          + position.coords.longitude             + '<br />' +
                        'Altitude: '           + position.coords.altitude              + '<br />' +
                        'Accuracy: '           + position.coords.accuracy              + '<br />' +
                        'Altitude Accuracy: '  + position.coords.altitudeAccuracy      + '<br />' +
                        'Heading: '            + position.coords.heading               + '<br />' +
                        'Speed: '              + position.coords.speed                 + '<br />' +
                        'Timestamp: '          + position.timestamp                    + '<br />';
}

// onError Callback receives a PositionError object
//
function onError(error) {
    alert('code: '    + error.code    + '\n' +
          'message: ' + error.message + '\n');
}

</script>
</head>
<body>
  <p id="geolocation">   Finding geolocation...</p>
</body>
</html>

标签： android cordova gps phonegap-plugins phonegap-build

3条回答

\"骚年 ilove

2楼-- · 2020-05-27 11:47

The answer to your question is below.

You cannot check *if gps is enabled*

You can set a timeout and get the timeout. You can do this by setting the timeout parameter in the geolocationoptions parameter. (which you did not use)

From the documentation

timeout: The maximum length of time (milliseconds) that is allowed to pass from the call to navigator.geolocation.getCurrentPosition or geolocation.watchPosition until the corresponding geolocationSuccess callback executes. If the geolocationSuccess callback is not invoked within this time, the geolocationError callback is passed a PositionError.TIMEOUT error code. (Note that when used in conjunction with geolocation.watchPosition, the geolocationError callback could be called on an interval every timeout milliseconds!) (Number)

WAIT I WAS WRONG

There is now a plugin that checks to see if the GPS is turned on.

In fact, more than one.

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3楼-- · 2020-05-27 11:51

Assuming we're talking just about Android platform only, as @Joerg rightly says, you can use cordova.plugins.diagnostic to check if GPS is enabled using isGpsLocationEnabled():

cordova.plugins.diagnostic.isGpsLocationEnabled(function(enabled){
    console.log("GPS location is " + (enabled ? "enabled" : "disabled"));
}, function(error){
    console.error("The following error occurred: "+error);
});

If the result is that GPS is switched off, you can either switch the user to the location settings page to manually enable GPS:

cordova.plugins.diagnostic.switchToLocationSettings();

Or, in addition, you could use cordova-plugin-request-location-accuracy to request high accuracy location mode (i.e. GPS) directly from within the app. This will show a native confirm dialog and if user agrees, GPS will be enabled automatically:

function onRequestSuccess(success){
    console.log("Successfully requested accuracy: "+success.message);
}

function onRequestFailure(error){
    console.error("Accuracy request failed: error code="+error.code+"; error message="+error.message);
    if(error.code !== cordova.plugins.locationAccuracy.ERROR_USER_DISAGREED){
        if(window.confirm("Failed to automatically set Location Mode to 'High Accuracy'. Would you like to switch to the Location Settings page and do this manually?")){
            cordova.plugins.diagnostic.switchToLocationSettings();
        }
    }
}

cordova.plugins.locationAccuracy.request(onRequestSuccess, onRequestFailure, cordova.plugins.locationAccuracy.REQUEST_PRIORITY_HIGH_ACCURACY);

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别忘想泡老子

4楼-- · 2020-05-27 12:00

The best way to check if GPS, Wifi, … is enabled, is to use this plugin:

https://www.npmjs.com/package/cordova.plugins.diagnostic

Using this plugin you can check a lot of features and you can switch the user to the settings.

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phonegap: how to check if gps is enabled

WAIT I WAS WRONG

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