根据时间间隔或位移获取位置更新

Question

我正在使用Fused Location Api来获取位置更新.当我将x秒设置为时间间隔时,每隔x秒我就会调用onLocationChanged().当我将10米设置为最小位置时,则在用户从其原始位置移动10米之前不会调用onLocationChanged().

但是当x秒通过或覆盖10米距离时,我需要调用onLocationChanged().

任何想法我怎么能实现这一点.

我的守则

private Location mLastLocation;
public static final int REQUEST_LOCATION = 1006;
LocationRequest mLocationRequest;
private static final long POLLING_FREQ = 1000 * 10;
private static final long FASTEST_UPDATE_FREQ = 1000 * 10;
private static final long SMALLEST_DISPLACEMENT = 10;

mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        mLocationRequest.setInterval(POLLING_FREQ);
        mLocationRequest.setFastestInterval(FASTEST_UPDATE_FREQ);
        mLocationRequest.setSmallestDisplacement(SMALLEST_DISPLACEMENT);

startLocationUpdates();

Answer 1

仅限于流离失所

  mLocationRequest.setInterval(0);
  mLocationRequest.setFastestInterval(0);
  mLocationRequest.setSmallestDisplacement(SMALLEST_DISPLACEMENT);

仅限间隔

 mLocationRequest.setInterval(POLLING_FREQ);
 mLocationRequest.setFastestInterval(FASTEST_UPDATE_FREQ);
 mLocationRequest.setSmallestDisplacement(0); // Not needed, already default value is 0

通常使用AND计算间隔和距离参数.这意味着当你改变你的位置至少SMALLEST_DISPLACEMENT米并且至少已经过了POLLING_FREQ毫秒时,那么onLocationChanged()将被触发.