안드로이드 두지점(위도,경도) 사이의 거리

두지점(위도,경도) 사이의 거리

java)

package com.ghj.blog_036;
 
import android.location.Location;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
 
public class MainActivity extends AppCompatActivity {
 
    //UI
    TextView txtJava;
    TextView txtAndroid;
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        //UI
        txtJava = (TextView)findViewById(R.id.txtJava);
        txtAndroid = (TextView)findViewById(R.id.txtAndroid);
 
        txtJava.setText(DistanceByDegree(37.476780, 126.981429, 37.504445, 127.049317)+"m");
        txtAndroid.setText(DistanceByDegreeAndroid(37.476780, 126.981429, 37.504445, 127.049317)+"m");
    }
 
    //두지점(위도,경도) 사이의 거리
    public double DistanceByDegree(double _latitude1, double _longitude1, double _latitude2, double _longitude2){
        double theta, dist;
        theta = _longitude1 - _longitude2;
        dist = Math.sin(DegreeToRadian(_latitude1)) * Math.sin(DegreeToRadian(_latitude2)) + Math.cos(DegreeToRadian(_latitude1))
                * Math.cos(DegreeToRadian(_latitude2)) * Math.cos(DegreeToRadian(theta));
        dist = Math.acos(dist);
        dist = RadianToDegree(dist);
 
        dist = dist * 60 * 1.1515;
        dist = dist * 1.609344;    // 단위 mile 에서 km 변환.
        dist = dist * 1000.0;      // 단위  km 에서 m 로 변환
 
        return dist;
    }
 
    //안드로이드 - 두지점(위도,경도) 사이의 거리
    public double DistanceByDegreeAndroid(double _latitude1, double _longitude1, double _latitude2, double _longitude2){
        Location startPos = new Location("PointA");
        Location endPos = new Location("PointB");
 
        startPos.setLatitude(_latitude1);
        startPos.setLongitude(_longitude1);
        endPos.setLatitude(_latitude2);
        endPos.setLongitude(_longitude2);
 
        double distance = startPos.distanceTo(endPos);
 
        return distance;
    }
 
    //degree->radian 변환
    public double DegreeToRadian(double degree){
        return degree * Math.PI / 180.0;
    }
 
    //randian -> degree 변환
    public double RadianToDegree(double radian){
        return radian * 180d / Math.PI;
    }
}
 

xml)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <TextView
        android:text="(37.476780, 126.981429) 와 (37.504445, 127.049317) 사이의 거리"
        android:textSize="24dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
 
    <TextView
        android:id="@+id/txtJava"
        android:textSize="24dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
 
    <TextView
        android:id="@+id/txtAndroid"
        android:textSize="24dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>
 

결과

두 API 사이에 차이가 있다