如何在我的位置跟踪应用程序中移动GPS距离？Android、java

Question

所以我让全球定位系统从我“按下播放”开始持续跟踪和记录我的位置。我想显示所行驶的距离、平均速度、所花费时间的上升和下降。

我正在用我的“LocationsService.java”类记录我的位置，这个类使用startLocationService（），它通过LocationCallback循环（我想）。我使用从@TDIScott获得的代码创建了一个hashmap，并将其放入列表中。

public List<Map<Long, Location>> locationHistory = new ArrayList<>();

private LocationCallback locationCallback = new LocationCallback(){
    @Override
    public void onLocationResult(LocationResult locationResult) {
        super.onLocationResult(locationResult);
        if(locationResult != null && locationResult.getLastLocation() != null){
            double latitude = locationResult.getLastLocation().getLatitude();
            double longitude = locationResult.getLastLocation().getLongitude();
            int altitude = (int) locationResult.getLastLocation().getAltitude();
            double speed = locationResult.getLastLocation().getSpeed();
            Log.d("LOCATION_UPDATE", latitude + ", " + longitude + ", " + altitude + ", " + speed + ", " + System.currentTimeMillis() + ", " + locationResult.getLastLocation());

            Map<Long, Location> temp = new HashMap<>();
            temp.put(System.currentTimeMillis(), locationResult.getLastLocation());
            locationHistory.add(temp);
        }
    }
};

private void startLocationService() {
    String channelId = "location_notification_channel";
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    Intent resultIntent = new Intent();
    PendingIntent pendingIntent = PendingIntent.getActivity(
            getApplicationContext(),
            0,
            resultIntent,
            PendingIntent.FLAG_UPDATE_CURRENT
    );
    NotificationCompat.Builder builder = new NotificationCompat.Builder(
            getApplicationContext(),
            channelId
    );
    builder.setSmallIcon(R.mipmap.ic_launcher);
    builder.setContentTitle("iAthletics is recording"); //Endre til iAthletics is recording
    builder.setDefaults(NotificationCompat.DEFAULT_ALL);
    builder.setContentText("Running");
    builder.setContentIntent(pendingIntent);
    builder.setAutoCancel(false);
    builder.setPriority(NotificationCompat.PRIORITY_MAX);

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        if (notificationManager != null && notificationManager.getNotificationChannel(channelId) == null) {
            NotificationChannel notificationChannel = new NotificationChannel(channelId, "Location Service", NotificationManager.IMPORTANCE_HIGH);
            notificationChannel.setDescription("This channel is used by location service");
            notificationManager.createNotificationChannel(notificationChannel);
        }
    }

    LocationRequest locationRequest = new LocationRequest();
    locationRequest.setInterval(1000);
    locationRequest.setFastestInterval(500);
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper()); //TODO Husk eventuell permission check hvis det ikke funker
    startForeground(Constants.LOCATION_SERVICE_ID, builder.build());
}

更新问题：如何访问在“LocationSevice.java”类中创建的列表中的位置对象，并计算平均速度、距离、上升和下降？从活动类。

PS：我已经尝试了TDIScott提供的第二个代码，但它不起作用。

如果需要，以下是location对象如何存储在日志中，并且可能存储在列表中：

位置[保险丝59896346,10621862 hAcc=31 et=4d21h21m52s480ms alt=65.79999542236328 vel=0.10678082 bear=100.58679 vAcc=11 sAcc=？？？bAcc=？？{Bundle[mParcelledData.dataSize=52]

Answer 1

您可以检查任何可用于地理定位的包。

Answer 2

您可以将数据存储在LocationResult列表中，以便更详细地说出两次之间的距离，或者只是在进行时将它们相加。

存储：

    List<Map<Long,LocationResult> locationHistory = new ArrayList();
    private LocationCallback locationCallback = new LocationCallback(){
@Override
public void onLocationResult(LocationResult locationResult) {
    super.onLocationResult(locationResult);
    if(locationResult != null && locationResult.getLastLocation() != null){
        double latitude = locationResult.getLastLocation().getLatitude();
        double longitude = locationResult.getLastLocation().getLongitude();
        int altitude = (int) locationResult.getLastLocation().getAltitude();
        Log.d("LOCATION_UPDATE", latitude + ", " + longitude + ", " + altitude);

        Map<Long, LocationResult> temp = new HashMap<>();
        temp.put(System.currentTimeMillis(), locationResult);

        locationHistory.add(temp);
    }
}
};

有了以上内容，您现在有了一个以毫秒为单位的时间键和一个LocationResult值。

您可以通过

    Map<Long, LocationResult> locationHistory = new HashMap<>();
    LocationResult temp = null;
    float distance = 0;
    for (Map.Entry<Long, LocationResult> entry : locationHistory.entrySet()) {
        if(temp != null){
            distance += temp.distanceTo(entry.getValue());
            temp = entry.getValue();
        }
    }

    textView.setText(String.valueOf(distance));

现在您有了LocationResult，将它们相加并执行您需要的操作。就是计算距离、海拔上升和下降等。