在Android開發當中，經常需要用到定位功能，尤其是依賴于地理位置功能的應用，很多人喜歡使用百度地圖，高德地圖提供的sdk，開放API，但是在僅僅需要經緯度，或者城市，街道地址等信息，并不需要提供預覽地圖，地圖界面的應用中，這時，不需要使用百度地圖，高德地圖，這樣做只會增加apk的體積。
其實LocationManager，Geocoder這些Android API給我們提供的這些類就可以滿足了。下面我們就來講講如何利用LocationManager獲取經緯度
LocationUtils類代碼：
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)實現單例
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.獲取位置管理器
locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
//2.獲取位置提供器，GPS或是NetWork
List<String> providers = locationManager.getProviders(true);
if (providers.contains(LocationManager.NETWORK_PROVIDER)){
//如果是網絡定位
Log.d(TAG, "如果是網絡定位");
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, "沒有可用的位置提供器");
return;
}
// 需要檢查權限,否則編譯報錯,想抽取成方法都不行,還是會報錯。只能這樣重復 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.獲取上次的位置，一般第一次運行，此值為null
Location location = locationManager.getLastKnownLocation(locationProvider);
if (location!=null){
setLocation(location);
}
// 監視地理位置變化，第二個和第三個參數分別為更新的最短時間minTime和最短距離minDistace
locationManager.requestLocationUpdates(locationProvider, 5000, 3,locationListener);
}
private void setLocation(Location location){
this.location =location;
String address = "緯度："+location.getLatitude()+"經度："+location.getLongitude();
Log.d(TAG,address);
}
//獲取經緯度
public Location showLocation(){
return location;
}
// 移除定位監聽
public void removeLocationUpdatesListener() {
// 需要檢查權限,否則編譯不過
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監聽器
* 參數：地理位置提供器、監聽位置變化的時間間隔、位置變化的距離間隔、LocationListener監聽器
*/
LocationListener locationListener = new LocationListener() {
/**
* 當某個位置提供者的狀態發生改變時
*/
@Override
public void onStatusChanged(String provider, int status, Bundle arg2) {
}
/**
* 某個設備打開時
*/
@Override
public void onProviderEnabled(String provider) {
}
/**
* 某個設備關閉時
*/
@Override
public void onProviderDisabled(String provider) {
}
/**
* 手機位置發生變動
*/
@Override
public void onLocationChanged(Location location) {
location.getAccuracy();//精確度
setLocation(location);
}
};
}
MainActivity測試代碼：
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 = "緯度："+location.getLatitude()+"經度："+location.getLongitude();
Log.d("FLY.onCreate",address);
textView.setText(address);
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
LocationUtils.getInstance(MainActivity.this).removeLocationUpdatesListener();
}
}
希望對你們有幫助！！！！！
項目地址：https://github.com/MapleSunFLY/PositionLongitudeLatitude.git
