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. |