Android 高德地图根据地址获取经纬度，计算两个坐标的距离

 

1、到高德开放平台申请，获取key

高德开放平台：https://lbs.amap.com/

 

 2、下载高德定位及地址搜索SDK:https://download.csdn.net/download/meixi_android/10845407

 

3、项目绑定高德SDK

（1）配置key

 <meta-data android:name="com.amap.api.v2.apikey"
        android:value="c8f6c5070cd7fd3ece3b50b342218487" />
    <service android:name="com.amap.api.location.APSService"></service>
</application>

（2）activity实现定位接口

implements AMapLocationListener 

//实现方法

@Override
public void onLocationChanged(AMapLocation aMapLocation) {

}

（3）已知地址获取经纬度方法：

    private void getLatlon(String cityName){

        GeocodeSearch geocodeSearch=new GeocodeSearch(this);
        geocodeSearch.setOnGeocodeSearchListener(new GeocodeSearch.OnGeocodeSearchListener() {
            @Override
            public void onRegeocodeSearched(RegeocodeResult regeocodeResult, int i) {

            }

            @Override
            public void onGeocodeSearched(GeocodeResult geocodeResult, int i) {

                if (i==1000){
                    if (geocodeResult!=null && geocodeResult.getGeocodeAddressList()!=null &&
                            geocodeResult.getGeocodeAddressList().size()>0){

                        GeocodeAddress geocodeAddress = geocodeResult.getGeocodeAddressList().get(0);
                        double latitude = geocodeAddress.getLatLonPoint().getLatitude();//纬度
                        double longititude = geocodeAddress.getLatLonPoint().getLongitude();//经度
                        String adcode= geocodeAddress.getAdcode();//区域编码

                        Log.e("lgq地理编码", geocodeAddress.getAdcode()+"");
                        Log.e("lgq纬度latitude",latitude+"");
                        Log.e("lgq经度longititude",longititude+"");

                        Log.i("lgq","dddwww===="+longititude);

                    }else {
                        Toast.makeText(MainActivity.this,"地名出错",Toast.LENGTH_SHORT).show();
//                        ToastUtils.show(context,"地址名出错");
                    }
                }
            }
        });

        GeocodeQuery geocodeQuery=new GeocodeQuery(cityName.trim(),"29");
        geocodeSearch.getFromLocationNameAsyn(geocodeQuery);


    }

测试数据：

getLatlon("东莞市东城街道温塘横岭工业区二街38号");

结果：

12-12 13:51:52.555 21394-21394/com.tianxin.mapclient.liteapp E/lgq地理编码: 441900
12-12 13:51:52.555 21394-21394/com.tianxin.mapclient.liteapp E/lgq纬度latitude: 23.036034
12-12 13:51:52.556 21394-21394/com.tianxin.mapclient.liteapp E/lgq经度longititude: 113.816161

 

 

4、计算两个坐标的距离

LatLng latLng2=new LatLng(23.025845,113.752532);
LatLng latLng=new LatLng(23.025845,113.772532);
float distance = AMapUtils.calculateLineDistance(latLng,latLng2);
float qianmifload =(float) distance/1000;
Log.i("lgq","sss===="+round(qianmifload,2)+" 千米");

 四舍五入到两位小数

public static float round(float v, int scale)
{
    if (scale < 0)
        throw new IllegalArgumentException("The scale must be a positive integer or zero");
    BigDecimal bgNum1 = new BigDecimal(Float.toString(v));
    BigDecimal bgNum2 = new BigDecimal("1");
    return bgNum1.divide(bgNum2, scale, BigDecimal.ROUND_HALF_UP).floatValue();
    // return b.setScale(scale, BigDecimal.ROUND_HALF_UP).floatValue();
}