android 获取手机GPS当前位置的经纬度

sancaiodm Android应用 2021-08-23 3302 0

Android平台在开发过程中主要使用LocationManager和LocationProviders对象。

- LocationManager：

用来管理Location功能相关

- LocationProviders：

提供四种不能的定位功集合

public static final String GPS_PROVIDER = "gps"; //GPS方式定位

public static final String NETWORK_PROVIDER = "network"; //网络定位

public static final String PASSIVE_PROVIDER = "passive"; //被动定位

public static final int LOCATION_MODE_SENSORS_ONLY = 1;

public static final int LOCATION_MODE_BATTERY_SAVING = 2;

public static final int LOCATION_MODE_HIGH_ACCURACY = 3;

低版本的android源码中

case LOCATION_MODE_OFF:

break;

case LOCATION_MODE_SENSORS_ONLY:

gps = true;

break;

case LOCATION_MODE_BATTERY_SAVING:

network = true;

break;

case LOCATION_MODE_HIGH_ACCURACY:

gps = true;

network = true;

break;

default:

	使用GPS、WLAN和移动网络	使用WLAN和移动网络	仅使用GPS
截图
特点	同时使用GPS、WIFI及基站定位，速度快、精度高，室内定位效果好。缺点：耗流量、耗电量	只使用WIFI和基站定位，需要WIFI或者基站才行，室内效果好。缺点：依赖WIFI或基站，精度一般	不依赖WIFI和基站，室内效果差，户外可靠性好。缺点：室内效果差
代码	LocationManager.GPS_PROVIDER = true； LocationManager.NETWORK_PROVIDER = true;	LocationManager.GPS_PROVIDER = false； LocationManager.NETWORK_PROVIDER = true;	LocationManager.GPS_PROVIDER = true； LocationManager.NETWORK_PROVIDER = false;
是否打开定位服务	Settings.Secure.LOCATION_MODE = 3	Settings.Secure.LOCATION_MODE = 2	Settings.Secure.LOCATION_MODE = 1

aosp/frameworks/base/core/java/android/provider/Settings.java

@Deprecated

public static boolean isLocationProviderEnabled(ContentResolver cr, String provider) {

String allowedProviders = Settings.Secure.getStringForUser(cr,

LOCATION_PROVIDERS_ALLOWED, cr.getUserId());

return TextUtils.delimitedStringContains(allowedProviders, ',', provider);

}

/**

* Thread-safe method for enabling or disabling a single location provider. This will have

* no effect on Android Q and above.

* @param cr the content resolver to use

* @param provider the location provider to enable or disable

* @param enabled true if the provider should be enabled

* @deprecated This API is deprecated

@Deprecated

public static void setLocationProviderEnabled(ContentResolver cr,

String provider, boolean enabled) {

}

@TestApi

public static final String FUSED_PROVIDER = "fused"; //测试API接口，是一个系统级隐藏API,开发过程中可直接忽略，

1 //判断指定方式的定位服务是否开启

1 Log.i("androidodm", "GPS是否打开 " + mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER));

2 Log.i("androidodm", "网络定位是否打开 " + mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER));

2 //判断系统是否开启定位服务（不限指定位置服务提供者）

boolean enable = mLocationManager.isLocationEnabled();

//代码开启GPS方式位置服务

Log.d(TAG, "Enable GPS time sync");

LocationManager mLocationManager = (LocationManager) mContext.getSystemService( Context.LOCATION_SERVICE);

boolean gpsEnabled = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

if (!gpsEnabled) {

Log.d(TAG, "Enable GPS time sync gpsEnabled =" + gpsEnabled);

int currentUserId = ActivityManager.getCurrentUser();

Settings.Secure.putIntForUser(mContext.getContentResolver(),

Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_SENSORS_ONLY,currentUserId);

}

///aosp/frameworks/base/services/core/java/com/android/server/location/SettingsHelper.java 开启定位服务的API接口实现，

/**

* Location mode is off.

public static final int LOCATION_MODE_OFF = 0;

public void setLocationEnabled(boolean enabled, int userId) {

long identity = Binder.clearCallingIdentity();

try {

Settings.Secure.putIntForUser(

mContext.getContentResolver(),

Settings.Secure.LOCATION_MODE,

enabled

? Settings.Secure.LOCATION_MODE_ON

: Settings.Secure.LOCATION_MODE_OFF,

userId);

} finally {

Binder.restoreCallingIdentity(identity);

}

//Q及Q以上版本

boolean nlpSuccess = Settings.Secure.setLocationProviderEnabled( cr, LocationManager.NETWORK_PROVIDER, true/false);

boolean gpsSuccess = Settings.Secure.setLocationProviderEnabled( cr, LocationManager.GPS_PROVIDER, true/false);

//end

public static boolean isLocationEnable(Context context) {

int mode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_OFF);

return mode != Settings.Secure.LOCATION_MODE_OFF;

}

public static void setLocationEnable(Context context, boolean enable) {

if (enable) {

Settings.Secure.putInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_HIGH_ACCURACY);

} else {

Settings.Secure.putInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF);

}

public static boolean isLocationGpsOnly(Context context) {

int mode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_SENSORS_ONLY);

return mode == Settings.Secure.LOCATION_MODE_SENSORS_ONLY;

}

public static void setLocationGpsOnly(Context context) {

Settings.Secure.putInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_SENSORS_ONLY);

}

private double latitude=0.0;
private double longitude =0.0;
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
if(locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){//判断设备的GPS定位功能是否开启

Criteria criteria = new Criteria();

criteria.setAccuracy(Criteria.ACCURACY_COARSE);

criteria.setAltitudeRequired(false);

criteria.setBearingRequired(false);

criteria.setCostAllowed(true);

criteria.setPowerRequirement(Criteria.POWER_LOW);

String provider = locationManager.getBestProvider(criteria, true);

Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

// Location location = locationManager.getLastKnownLocation(provider);

if(location != null){
latitude = location.getLatitude();
longitude = location.getLongitude();
               }
       }else{
           LocationListener locationListener = new LocationListener() {
               // Provider的状态在可用、暂时不可用和无服务三个状态直接切换时触发此函数
               @Override
               public void onStatusChanged(String provider, int status, Bundle extras) {
//doString

               }

               // Provider被enable时触发此函数，比如GPS被打开
               @Override
               public void onProviderEnabled(String provider) {
//doString
               }

               // Provider被disable时触发此函数，比如GPS被关闭
               @Override
               public void onProviderDisabled(String provider) {
  //doString

}

               //当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发
               @Override
               public void onLocationChanged(Location location) {
                   if (location != null) {
                       Log.e("Map", "Location changed : Lat: "   + location.getLatitude() + " Lng: " + location.getLongitude());
                   }
               }
           };

/**服务管理对象的监听器*/

//参数1：定位的方式参数2：监听更新间隔时间(ms) 参数3：监听更新的距离(m) 参数4：监听的方法

           locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);
           Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
           if(location != null){
               latitude = location.getLatitude(); //经度
               longitude = location.getLongitude(); //纬度
           }

}//else

另一个判断设备GPS定位是否开启的判断方式：

boolean gpsEnabled = Settings.Secure.isLocationProviderEnabled(context.getContentResolver(), LocationManager.GPS_PROVIDER );

当有一些特殊APP(如SOS功能APP)需要在不需人为介入的情况下自动开启GPS定位功能，则使用如下代码,需要android.permission.WRITE_SECURE_SETTINGS权限

Settings.Secure.setLocationProviderEnabled( context.getContentResolver(), LocationManager.GPS_PROVIDER, true );

自动跳转到Settings的GPS功能界面"设置-位置信息访问权限"进行设置.

Intent settingsIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);

settingsIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

context.startActivity(settingsIntent);

同时别忘了在AndroidManifest.xml文件中加入如下权限：

<uses-permission android:name="android.permission.INTERNET" />
    
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

//封装GPS功能成工具类 https://blog.csdn.net/u012810020/article/details/52517976/