在Android开发当中，经常需要用到定位功能，尤其是依赖于地理位置功能的应用，很多人喜欢使用百度地图，高德地图提供的sdk，开放API，但是在仅仅需要经纬度，或者城市，街道地址等信息，并不需要提供预览地图，地图界面的应用中，这时，不需要使用百度地图，高德地图，这样做只会增加apk的体积。
其实LocationManager，Geocoder这些Android API给我们提供的这些类就可以满足了。下面我们就来讲讲如何利用LocationManager获取经纬度
LocationUtils类代码：
package com.kf.position.positionlibrary;
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.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import java.util.List;
/**
* Created by "FLY" on 2017/3/2.
*/
public class LocationUtils {
String TAG = "FLY.LocationUtils";
private volatile static LocationUtils uniqueInstance;
private LocationManager locationManager;
private String locationProvider;
private Location location;
private Context mContext;
private LocationUtils(Context context) {
mContext = context;
getLocation();
}
//采用Double CheckLock(DCL)实现单例
public static LocationUtils getInstance(Context context) {
if (uniqueInstance == null) {
synchronized (LocationUtils.class) {
if (uniqueInstance == null) {
uniqueInstance = new LocationUtils( context );
}
}
}
return uniqueInstance;
}
private void getLocation(){
//1.获取位置管理器
locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
//2.获取位置提供器，GPS或是NetWork
List<String> providers = locationManager.getProviders(true);
if (providers.contains(LocationManager.NETWORK_PROVIDER)){
//如果是网络定位
Log.d(TAG, "如果是网络定位");
locationProvider = LocationManager.NETWORK_PROVIDER;
}else if (providers.contains(LocationManager.GPS_PROVIDER)){
//如果是GPS定位
Log.d(TAG, "如果是GPS定位");
locationProvider = LocationManager.GPS_PROVIDER;
}else {
Log.d(TAG, "没有可用的位置提供器");
return;
}
// 需要检查权限,否则编译报错,想抽取成方法都不行,还是会报错。只能这样重复 code 了。
if ( Build.VERSION.SDK_INT >= 23 &&
ActivityCompat.checkSelfPermission( mContext, android.Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission( mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return ;
}
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
//3.获取上次的位置，一般第一次运行，此值为null
Location location = locationManager.getLastKnownLocation(locationProvider);
if (location!=null){
setLocation(location);
}
// 监视地理位置变化，第二个和第三个参数分别为更新的最短时间minTime和最短距离minDistace
locationManager.requestLocationUpdates(locationProvider, 5000, 3,locationListener);
}
private void setLocation(Location location){
this.location =location;
String address = "纬度："+location.getLatitude()+"经度："+location.getLongitude();
Log.d(TAG,address);
}
//获取经纬度
public Location showLocation(){
return location;
}
// 移除定位监听
public void removeLocationUpdatesListener() {
// 需要检查权限,否则编译不过
if ( Build.VERSION.SDK_INT >= 23 &&
ActivityCompat.checkSelfPermission( mContext, android.Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission( mContext, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return ;
}
if (locationManager != null) {
uniqueInstance=null;
locationManager.removeUpdates(locationListener);
}
}
/**
* LocationListern监听器
* 参数：地理位置提供器、监听位置变化的时间间隔、位置变化的距离间隔、LocationListener监听器
*/
LocationListener locationListener = new LocationListener() {
/**
* 当某个位置提供者的状态发生改变时
*/
@Override
public void onStatusChanged(String provider, int status, Bundle arg2) {
}
/**
* 某个设备打开时
*/
@Override
public void onProviderEnabled(String provider) {
}
/**
* 某个设备关闭时
*/
@Override
public void onProviderDisabled(String provider) {
}
/**
* 手机位置发生变动
*/
@Override
public void onLocationChanged(Location location) {
location.getAccuracy();//精确度
setLocation(location);
}
};
}
MainActivity测试代码：
package com.kf.position.positionlongitudelatitude;
import android.app.Activity;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.kf.position.positionlibrary.LocationUtils;
public class MainActivity extends Activity {
private TextView textView;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.text);
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Location location = LocationUtils.getInstance(MainActivity.this).showLocation();
if (location!=null){
String address = "纬度："+location.getLatitude()+"经度："+location.getLongitude();
Log.d("FLY.onCreate",address);
textView.setText(address);
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
LocationUtils.getInstance(MainActivity.this).removeLocationUpdatesListener();
}
}
希望对你们有帮助！！！！！
项目地址：https://github.com/MapleSunFLY/PositionLongitudeLatitude.git
