デバイスのロケーション（ GPS ）を表示します。
| altitude | Geographical device location altitude in meters. |
| horizontalAccuracy | Horizontal accuracy radius of the location in meters. |
| latitude | 緯度を返す。 |
| longitude | Geographical device location longitude. |
| timestamp | Timestamp (in milliseconds from 1970) of when location data was last updated. |
| verticalAccuracy | Vertical accuracy radius of the location in meters. |