视频加载中...
在APP开发中，有时需要获取用户的地理位置，那么，怎样用代码实现呢？
只需要一个类：
package com.tool;
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.util.Log;
import java.util.List;
public class LocationUtils {
private volatile static LocationUtils uniqueInstance;
private LocationManager locationManager;
private String locationProvider;
private Location location;
private Context mContext;
private String TAG="嗯";
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, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED &&
// ActivityCompat.checkSelfPermission( mContext, 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, 0, 0, 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, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED &&
// ActivityCompat.checkSelfPermission( mContext, 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 );
}
};
}
在ACTYVITY中调用就可以
btn.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
Location location = LocationUtils.getInstance( MainActivity.this ).showLocation();
if (location != null) {
String address = "纬度：" + location.getLatitude() + "经度：" + location.getLongitude();
Log.d( "FLY.LocationUtils", address );
text.setText( address );
}
}
} );
