一、手机App定位在我看来有三种方法：
1.通过Android自带的API:LocationManager获取到经纬度，再通过Geocoder反地理位置查询到所在的地址。
2.外接SDK，如高德SDK，百度SDK直接获得到经纬度和地址
3.通过外部接口获取到外网IP,再通过百度API或者聚合数据的API得出地址
1、Android自带API,它有三种定位方式可以通过GPS，网络和WIFI定位。
1.1步骤：
a.清单文件中配置权限：
b.定位util（从stackoverflow扒来的~顺带改了下）
package co.chexiao.itwarehouse.util;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import java.util.Timer;
import java.util.TimerTask;
import co.chexiao.itwarehouse.app.App;
/**
* Author: xx
* Time:2018/4/23 19:37.
* Description:stackoverflower上的定位
*/
public class MyLocation {
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled = false;
boolean network_enabled = false;
boolean passive_enabled = false;
public boolean getLocation(Context context, LocationResult result) {
// I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult = result;
if (lm == null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//是否可用
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
}
try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {
}
try {
passive_enabled = lm.isProviderEnabled(LocationManager.PASSIVE_PROVIDER);
} catch (Exception ex) {
}
//如果gps和网络还有wifi不行就不开监听
if (!gps_enabled && !network_enabled&& !passive_enabled)
return false;
//压制警告
if (ActivityCompat.checkSelfPermission(App.getInstance(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(App.getInstance(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return true;
}
if (gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
if(passive_enabled)
lm.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, 0, 0, locationListenerpassive);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 20000);
return true;
}
//关闭定位
public void cancelTimer() {
timer1.cancel();
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
lm.removeUpdates(locationListenerpassive);
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
lm.removeUpdates(locationListenerpassive);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerpassive);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerpassive = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
class GetLastLocation extends TimerTask {
@Override
public void run() {
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
lm.removeUpdates(locationListenerpassive);
Location net_loc=null, gps_loc=null,passive_loc=null;
//压制警告
if (ActivityCompat.checkSelfPermission(App.getInstance(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(App.getInstance(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
if(gps_enabled)
gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if(passive_enabled)
passive_loc=lm.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);
//使用最近的一条
if(gps_loc!=null && net_loc!=null&&passive_loc!=null){
if(gps_loc.getTime()>net_loc.getTime()&&gps_loc.getTime()>passive_loc.getTime()){
locationResult.gotLocation(gps_loc);
} else if (net_loc.getTime()>gps_loc.getTime()&&net_loc.getTime()>passive_loc.getTime()){
locationResult.gotLocation(net_loc);
}else {
locationResult.gotLocation(passive_loc);
}
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
if(passive_loc!=null){
locationResult.gotLocation(passive_loc);
return;
}
locationResult.gotLocation(null);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}
c.申请权限获取到经纬度
private void requirePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(MyApplication.getInstance(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
}else{
MyLocation.LocationResult locationResult = new MyLocation.LocationResult(){
@Override
public void gotLocation(Location location){
setLocation(location);
}
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(MainActivity.this, locationResult);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == MY_PERMISSIONS_REQUEST_CALL_PHONE){
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
//判断是否勾选禁止后不再询问
boolean showRequestPermission = ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, permissions[i]);
if (showRequestPermission) {
MyToast.showToast("权限未申请");
}
}else {
MyLocation.LocationResult locationResult = new MyLocation.LocationResult(){
@Override
public void gotLocation(Location location){
setLocation(location);
}
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(MainActivity.this, locationResult);
}
}
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
d.将经纬度查询到地址
private void setLocation(Location location) {
if (location!=null) {
String mfeatureName = null;
Geocoder geocoder = new Geocoder(MainActivity.this);
List
addList = null;// 解析经纬度try {
addList = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
} catch (IOException e) {
e.printStackTrace();
}
if (addList != null && addList.size() > 0) {
for (int i = 0; i < addList.size(); i++) {
Address add = addList.get(i);
mfeatureName = add.getFeatureName();
tvLocaiton.setText(mfeatureName);
}
}
}
}e.关闭定时器
myLocation.cancelTimer();
1.2评价：精确度较强，稳定性一般，300行代码搞定，对app体积影响较小，基本满足普通用户的需求。
2、外接sdk
2.1步骤：自己去高德sdk，百度sdk官网接入吧，文档都写的很好。
2.2评价：精确度强，稳定性强，因为需要导入第三方sdk，只用定位这个功能app会增加3、400k的大小，如果需要精准快速定位可以外接SDK
3.通过外部接口获取到外网ip,通过百度api或者聚合数据api将ip解析地址
3.1步骤：
a.请求下面的两个接口，将返回结果通过匹配正则表达式获取到外网IP
CMYIP
TAOBAOIP
public static String getOuterNetFormCmyIP(String response) {
Pattern pattern = Pattern .compile("((?:(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d)))\\.){3}(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d))))");
Matcher matcher = pattern.matcher(response.toString());
if (matcher.find()) {
String group = matcher.group(); return group;
}
return null;
}或者直接请求这个接口获取到IP
CHANAZ
b.获取到IP后，再通过百度API或者聚合数据API将IP解析为地址
聚合数据API
百度API
3.2 评价：精确度差，稳定性差，代码量少，对app体积影响较小，不建议使用。
二、说点啥
以上的三种方法都是我瞎编的...哈哈哈