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：
我要评论
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sdk2.1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
cmyiptaobaoip
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api3.2 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。
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