我可以在驾驶或步行时动态地从起始位置绘制折线,我只需要计算当前行程的速度一定的间隔。
请建议我如何使用GPS /网络服务计算速度。
答案 0 :(得分:2)
速度:行驶距离除以行程时间。
所以要计算当前速度,计算你得到的两个最后位置之间的距离(通过Location.distanceTo())并除以该距离所需的时间,这是时间戳的差异。地点。
或者,只需使用Location.getSpeed()
即可答案 1 :(得分:1)
检查下面的代码,由我完成,并且运行良好。在这很多与你的东西有关的代码中,因为我和你的要求完全相同。所以你可以使用下面给出的所有代码。如果你发现它是不真实的,那么就不要使用它。
@Override
public void onLocationChanged(Location location) {
try {
if (location != null) {
if (current_lat != null && current_lat > 0) {
latitude = current_lat;
}
if (current_long != null && current_long > 0) {
longitude = current_long;
}
current_lat = location.getLatitude();
current_long = location.getLongitude();
distanceBetweenTwoPoint = getDistance(latitude, longitude, current_lat, current_long);
if ((current_lat > 0 && current_long > 0) && distanceBetweenTwoPoint > IjoomerApplicationConfiguration.track_DistanceBetweenPoints_IN_METERS) {
if (location.hasSpeed()) {
speedInKm = location.getSpeed() * 3.6;
} else {
speedInKm = 0.0;
}
row = new HashMap<String, String>();
row.put(TRACKID, IN_TRACKID + "");
row.put(LATITUDE, current_lat.toString());
row.put(LONGITUDE, current_long.toString());
row.put(SPEED, speedInKm + "");
row.put(TIMESTAMP, System.currentTimeMillis() + "");
row.put(STATUS, status);
distance = distance + (distanceBetweenTwoPoint / 1000);
row.put(DISTANCE, "" + distance);
dataProvider.InsertRow("TrackDetail", row);
row.put(LASTKNOWNLATITUDE, latitude.toString());
row.put(LASTKNOWNLONGITUDE, longitude.toString());
int seconds = (int) ((System.currentTimeMillis() - trackStartTime) / 1000) % 60;
int minutes = (int) (((System.currentTimeMillis() - trackStartTime) / (1000 * 60)) % 60);
int hours = (int) (((System.currentTimeMillis() - trackStartTime) / (1000 * 60 * 60)) % 24);
row.put(DURATION, String.valueOf(hours) + " : " + String.valueOf(minutes) + " : " + String.valueOf(seconds));
setNotification(speedInKm, String.valueOf(hours) + " : " + String.valueOf(minutes) + " : " + String.valueOf(seconds));
if (status.equalsIgnoreCase("1")) {
builder.append("|" + current_lat + "," + current_long);
trackDuration = String.valueOf(hours) + " : " + String.valueOf(minutes) + " : " + String.valueOf(seconds);
if (speedInKm > maxSpeed) {
maxSpeed = speedInKm;
}
totalSpeed = totalSpeed + speedInKm;
++totalTrackPoint;
sendBrodcastToActivity();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}