Android Here-lite SDK 中的 getScaleFromZoomLevel 等价物

Question

我想从 HERE Android SDK (starter/premium) 切换到新的 Lite SDK。在以前的库中，我有函数

public double getScaleFromZoomLevel(double level)

如何在 Here-lite 版本中获得这样的比例值？

Answer 1

是的，我同意Datasun。与您之前的版本一样，比例尺以每显示英寸厘米为单位给出地理距离，我对 lite API 中的功能的建议类似于：

DisplayMetrics appMetrics = new DisplayMetrics(); map.getDisplay().getMetrics(appMetrics);

GeoCoordinates southWest = map.getCamera().getBoundingRect().southWestCorner;
Point2D lowerright = map.getCamera().geoToViewCoordinates(southWest);

float screenPixelPerInch = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_IN, 1, appMetrics);

Point2D yRef = new Point2D(lowerright.x, lowerright.y + screenPixelPerInch);
GeoCoordinates yRefGeo = map.getCamera().viewToGeoCoordinates(yRef);

return yRefGeo.distanceTo(southWest);

Android Here-lite SDK 中的 getScaleFromZoomLevel 等价物

getScaleFromZoomLevel equivalent in Android Here-lite SDK

here-api