2
我想要做的是計算用戶正在查看地圖的圓的半徑。
我寫的解決方案至今如下(這是真的):在Google地圖中計算可見地圖用戶的半徑
mMap.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition cameraPosition) {
String TAG = AppController.TAG;
LatLngBounds bounds = mMap.getProjection().getVisibleRegion().latLngBounds;
LatLng target = cameraPosition.target;
LatLng northEast = bounds.northeast;
LatLng southEast = bounds.southwest;
float[] results1 = new float[1];
float[] results2 = new float[1];
Location.distanceBetween(target.latitude, target.longitude, northEast.latitude, northEast.longitude, results1);
Location.distanceBetween(target.latitude, target.longitude, southEast.latitude, southEast.longitude, results2);
double distance = results1[0] > results2[0] ? results1[0] : results2[0];
Log.d(TAG, "onCameraChange:" + results1[0] + " " + results2[0]);
}
});
我在這裏面臨着兩個問題:
1 - 首先,爲什麼中部和北部東ISN之間的distane不等於南西?
2-是否有任何內置的方法來實現相同的結果?
Tnx for answer,我想你不能回答第二個問題。但接受你的答案。 – Mehrdad