百度sdk定位当前的位置和经纬度，
主要是当时服务器没给返还经纬度，我是通过百度地图，获取地址转换经纬度，算出距离距离排序，可以美团，大众点评按距离排序相似，如果感觉可以了话希望多点赞MainActivity.javapackage com.example.my;
import java.text.DecimalFormat;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.Toast;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.search.core.SearchResult;
import com.baidu.mapapi.search.geocode.GeoCodeOption;
import com.baidu.mapapi.search.geocode.GeoCodeResult;
import com.baidu.mapapi.search.geocode.GeoCoder;
import com.baidu.mapapi.search.geocode.OnGetGeoCoderResultListener;
import com.baidu.mapapi.search.geocode.ReverseGeoCodeResult;
import com.example.mybaidumap.R;
public class MainActivity extends Activity implements OnGetGeoCoderResultListener {
private static final double EARTH_RADIUS = 6378.137;
boolean isFirstLoc = true;
private String currentAddress;
private TextView conaddress;
GeoCoder mSearch = null; // 搜索模块，也可去掉地图模块独立使用
BaiduMap mBaiduMap = null;
MapView mMapView = null;
private double longitude;
private double latitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 在使用SDK各组件之前初始化context信息，传入ApplicationContext
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_jw_main);
init();
}
private void init() {
conaddress=(TextView) findViewById(R.id.conaddress);
// ss = (TextView) findViewById(R.id.ss);
// 获取地图控件引用
//mMapView = (MapView) findViewById(R.id.bmapView);
//mBaiduMap = mMapView.getMap();
// 设置地图初始Zoom大小
//mBaiduMap.setMapStatus(MapStatusUpdateFactory.zoomTo(15.0f));
// 定位初始化
LocationClient mLocClient = new LocationClient(this);
MyLocationListenner myListener = new MyLocationListenner();
mLocClient.registerLocationListener(myListener);
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);
option.setAddrType("all");
mLocClient.setLocOption(option);
mLocClient.start();
CharSequence titleLable = "地理编码功能";
setTitle(titleLable);
// 初始化搜索模块，注册事件监听
mSearch = GeoCoder.newInstance();
mSearch.setOnGetGeoCodeResultListener(this);
findViewById(R.id.geocode).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Geo搜索
mSearch.geocode(new GeoCodeOption().city("").address("太阳宫新纪园便民洗车房,朝阳区,望京,北京"));
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
// 在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理
//mMapView.onDestroy();
//mSearch.destroy();
}
@Override
protected void onResume() {
super.onResume();
// 在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理
//mMapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
// 在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理
//mMapView.onPause();
}
/**
* 定位SDK监听函数
*/
public class MyLocationListenner implements BDLocationListener {
@SuppressLint("NewApi")
@Override
public void onReceiveLocation(BDLocation location) {
// map view 销毁后不在处理新接收的位置
/*if (location == null || mMapView == null)
return;
address = location.getAddrStr();
*/ if (isFirstLoc) {
isFirstLoc = false;
//获取定位的详细地址
currentAddress = location.getAddrStr();
//获取市之前的地址
//if(!address=null){
String addres=currentAddress.substring(0, currentAddress.lastIndexOf('市'));
conaddress.setText(addres);
//}
StringBuffer sb = new StringBuffer(256);
sb.append("time : ");
sb.append(location.getTime());
sb.append("\nwd : ");
sb.append(location.getLatitude());
sb.append("\nj d : ");
sb.append(location.getLongitude());
sb.append("\nradius : ");
sb.append(location.getRadius());
longitude = location.getLongitude();
latitude = location.getLatitude();
System.out.println("location " + "经度 = " + longitude
+ "纬度 = " + latitude );
Toast.makeText(getApplicationContext(), location.getAddrStr(), Toast.LENGTH_LONG).show();
}
}
public void SearchButtonProcess(View v) {
mSearch.geocode(new GeoCodeOption().address("西城区大成广场"
));
}
}
//计算两者之间的距离
public double calculateJWD(double lng_a, double lat_a, double lng_b, double lat_b) {
double radLat1 = (lat_a * Math.PI / 180.0);
double radLat2 = (lat_b * Math.PI / 180.0);
double a = radLat1 - radLat2;
double b = (lng_a - lng_b) * Math.PI / 180.0;
double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)
+ Math.cos(radLat1) * Math.cos(radLat2)
* Math.pow(Math.sin(b / 2), 2)));
s = s * EARTH_RADIUS;
s = Math.round(s * 10000) / 10000;
System.out.println("is name Math.round------>"+ s);
//int jw = (int) (s*1000);
// System.out.println("is name Math.round------>"+ jw);
DecimalFormat df = new DecimalFormat("#######0");
String dfs = df.format(s);
//ss.setText("距离:"+dfs+"米");
return s;
}
@Override
public void onGetGeoCodeResult(GeoCodeResult result) {
if (result == null || result.error != SearchResult.ERRORNO.NO_ERROR) {
Toast.makeText(MainActivity.this, "抱歉，未能找到结果", Toast.LENGTH_LONG)
.show();
return;
}
//拿到经纬度
String strInfo = String.format("纬度：%f 经度：%f",
result.getLocation().latitude, result.getLocation().longitude);
//算距离
double calculateJWD = calculateJWD(longitude,latitude, result.getLocation().longitude, result.getLocation().latitude);
Toast.makeText(MainActivity.this, strInfo, Toast.LENGTH_SHORT).show();
Toast.makeText(MainActivity.this, calculateJWD+"", Toast.LENGTH_LONG).show();
}
@Override
public void onGetReverseGeoCodeResult(ReverseGeoCodeResult result) {
if (result == null || result.error != SearchResult.ERRORNO.NO_ERROR) {
Toast.makeText(MainActivity.this, "抱歉，未能找到结果", Toast.LENGTH_LONG)
.show();
return;
}
}
}activity_jw_main.xml<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<!-- <com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="invisible"
android:clickable="true" /> -->
<TextView
android:id="@+id/conaddress"
android:layout_width="fill_parent"
android:gravity="left|center_vertical"
android:paddingLeft="10dp"
android:layout_height="30dp"
android:textSize="13sp"
android:background="#45000000"
android:textColor="#FFFFFF"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/conaddress"
android:layout_marginTop="19dp"
android:orientation="horizontal" >
<Button
android:id="@+id/geocode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/button_style"
android:text="Geo" />
</LinearLayout>
</RelativeLayout>
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