在 phonegap 上使用 cordova-plugin-mauron85-background-geolocation 显示纬度和经度

Question

我是 phonegap 的新手，它是插件。 我正在使用 cordova-plugin-mauron85-background-geolocation 插件，我的问题是我无法将 latitude 或 longitude 显示为警报。我无法弄清楚哪个变量正在存储这些数据。如果有人可以帮助我并向我解释哪个变量具有纬度或经度，我会很感激，这样我就可以在对话框中发出警报。 这是我正在使用的代码。

    <div>GPS</div>
    <button onclick="gps()" id="st">gps</button><br>
    <button onclick="pos()" id="st3">my position</button><br>
    <button onclick="gps_end()" id="st2">gps end</button><br>
    <button onclick="stats()" id="st5">status</button><br>`

<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript">`
    function onDeviceReady() {
    BackgroundGeolocation.configure({
    locationProvider: BackgroundGeolocation.ACTIVITY_PROVIDER,
    desiredAccuracy: BackgroundGeolocation.HIGH_ACCURACY,
    stationaryRadius: 50,
    distanceFilter: 50,
    notificationTitle: 'Background tracking',
    notificationText: 'enabled',
    debug: true,
    interval: 10000,
    fastestInterval: 5000,
    activitiesInterval: 10000,
    url: 'xxxxx',
    httpHeaders: {
      'X-FOO': 'bar'
    },
    // customize post properties
    postTemplate: {
      lat: '@latitude',
      lon: '@longitude',
      foo: 'bar' // you can also add your own properties
    }
    });

    BackgroundGeolocation.on('location', function(location) {
    // handle your locations here
    // to perform long running operation on iOS
    // you need to create background task
    BackgroundGeolocation.startTask(function(taskKey) {
      // execute long running task
      // eg. ajax post location
      // IMPORTANT: task has to be ended by endTask
      BackgroundGeolocation.endTask(taskKey);
    });
    });

    BackgroundGeolocation.on('stationary', function(stationaryLocation) {
    // handle stationary locations here
    });

    BackgroundGeolocation.on('error', function(error) {
    console.log('[ERROR] BackgroundGeolocation error:', error.code, 
    error.message);
     });

    BackgroundGeolocation.on('start', function() {
    console.log('[INFO] BackgroundGeolocation service has been started');
    });

    BackgroundGeolocation.on('stop', function() {
    console.log('[INFO] BackgroundGeolocation service has been stopped');
    });

    BackgroundGeolocation.on('authorization', function(status) {
    console.log('[INFO] BackgroundGeolocation authorization status: ' + status);
    if (status !== BackgroundGeolocation.AUTHORIZED) {

      setTimeout(function() {
        var showSettings = confirm('App requires location tracking permission. 
        Would you like to open app settings?');
        if (showSetting) {
          return BackgroundGeolocation.showAppSettings();
        }
        }, 1000);
        }
        });

       BackgroundGeolocation.on('background', function() {
    console.log('[INFO] App is in background');
    // you can also reconfigure service (changes will be applied immediately)
    BackgroundGeolocation.configure({ debug: true });
    });

    BackgroundGeolocation.on('foreground', function() {
    console.log('[INFO] App is in foreground');
    BackgroundGeolocation.configure({ debug: false });
      });

    BackgroundGeolocation.checkStatus(function(status) {
    console.log('[INFO] BackgroundGeolocation service is running', 
    status.isRunning);
    console.log('[INFO] BackgroundGeolocation services enabled', 
    status.locationServicesEnabled);
    console.log('[INFO] BackgroundGeolocation auth status: ' + 
        status.authorization);
      alert("entre a la funcion checkstatus")

    // you don't need to check status before start (this is just the example)
    if (!status.isRunning) {
      BackgroundGeolocation.start(); //triggers start on start event
    }
     });

    }

      document.addEventListener('deviceready', onDeviceReady, false);

      function gps(){
      alert("Starts GPS")
            BackgroundGeolocation.start();
            BackgroundGeolocation.checkStatus();
       alert ("GPS ON")
                    }




    function gps_end(){
     BackgroundGeolocation.checkStatus();
        alert("Ending gps")
     BackgroundGeolocation.stop();
    alert("No Gps")
                    }


     function pos() {
      alert("start pos function")
        BackgroundGeolocation.getCurrentLocation(
            function (locations) {
                alert(locations.latitude);
                                 }); 
                }

       function stats() {
              BackgroundGeolocation.checkStatus();
              var watchID = BackgroundGeolocation.getCurrentLocation(onSuccess, 
    onError, options);
                function onSuccess(position) {
                                                BackgroundGeolocation.start();
                                                lat=position.coords.latitude;
                                                long=position.coords.longitude;
                                                alert(long)         
                                             }
                    }

    function onError(position){

    show_alert('GPS','Unable to load GPS data.'+position.message,'OK'); 
                                }   


     </script>
 </body>

Answer 1

已更新配置以更快地锁定位置。

改成这个，看看发生了什么：

BackgroundGeolocation.on('location', function(location) {
    alert("Current location: " + JSON.stringify(location));
});

这当然是在您获得任何位置的情况下。你应该至少得到一个。那么你可能需要移动足够的距离才能获得新的。

您是在 config.xml 中添加<plugin name="cordova-plugin-mauron85-background-geolocation"/> 还是从命令行安装插件？

如果您在全新安装应用后未收到任何有关权限的问题，这可能是未获取任何位置的原因。

另外，看看您是否收到任何 JavaScript 错误。

如果您还没有报告问题，可以在 GitHub 上报告。

这是我目前使用的配置：

    var options = {
        locationProvider: BackgroundGeolocation.ACTIVITY_PROVIDER,
        desiredAccuracy: BackgroundGeolocation.MEDIUM_ACCURACY),
        stationaryRadius: 25,
        distanceFilter: 20,
        notificationTitle: 'Tracking position in the background',
        notificationText: 'enabled',
        debug: false,
        interval: 10000,
        fastestInterval: 5000,
        activitiesInterval: 5000,
        stopOnTerminate: false,
        startOnBoot: false,
        startForeground: true,
        pauseLocationUpdates: false,
        stopOnStillActivity: true,
        saveBatteryOnBackground: false

这在 config.xml 中：

<plugin name="cordova-plugin-mauron85-background-geolocation">
    <variable name="GOOGLE_PLAY_SERVICES_VERSION" value="11+" />
    <variable name="ANDROID_SUPPORT_LIBRARY_VERSION" value="23+" />
    <variable name="ALWAYS_USAGE_DESCRIPTION" value="The app needs background location tracking" />
    <variable name="MOTION_USAGE_DESCRIPTION" value="Accelerometer use increases battery efficiency by intelligently toggling location tracking" />
</plugin>

这就是我在位置事件中提取的内容：

    var timestamp = position.time;
    var latitude = position.latitude;
    var longitude = position.longitude;
    var accuracy = position.accuracy;
    var altitude = position.altitude;
    var speed = position.speed;
    var heading = position.bearing;