Android获取位置信息
Android中获取位置信息我们可以借助
LocationManager来获取
Google提供的最新方法可以参考这里
Medium参考
# 位置信息工具类
LocationManager主要使用的是该类
public class LocationFinder extends Service implements LocationListener {
Context context;
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 200 * 10 * 1; // 2 seconds
// Declaring a Location Manager
protected LocationManager locationManager;
public LocationFinder(Context context) {
this.context = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) context
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
// Log.e(“Network-GPS”, “Disable”);
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return null;
}
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
// Log.e(“Network”, “Network”);
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
} else
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
//Log.e(“GPS Enabled”, “GPS Enabled”);
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
return latitude;
}
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
return longitude;
}
public boolean canGetLocation() {
return this.canGetLocation;
}
public void showSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setTitle("提示");
alertDialog.setMessage("GPS未打开, 请开启后使用");
alertDialog.setPositiveButton("设置", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(intent);
}
});
alertDialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
/**
* Return the communication channel to the service. May return null if
* clients can not bind to the service. The returned
* {@link IBinder} is usually for a complex interface
* that has been <a href="{@docRoot}guide/components/aidl.html">described using
* aidl</a>.
*
* <p><em>Note that unlike other application components, calls on to the
* IBinder interface returned here may not happen on the main thread
* of the process</em>. More information about the main thread can be found in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html">Processes and
* Threads</a>.</p>
*
* @param intent The Intent that was used to bind to this service,
* as given to {@link Context#bindService
* Context.bindService}. Note that any extras that were included with
* the Intent at that point will <em>not</em> be seen here.
* @return Return an IBinder through which clients can call on to the
* service.
*/
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
/**
* Called when the location has changed.
*
* <p> There are no restrictions on the use of the supplied Location object.
*
* @param location The new location, as a Location object.
*/
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
/**
* Called when the provider is enabled by the user.
*
* @param provider the name of the location provider associated with this
* update.
*/
@Override
public void onProviderEnabled(String provider) {
}
/**
* Called when the provider is disabled by the user. If requestLocationUpdates
* is called on an already disabled provider, this method is called
* immediately.
*
* @param provider the name of the location provider associated with this
* update.
*/
@Override
public void onProviderDisabled(String provider) {
}
}
# 使用方法
LocationFinder finder;
public void testLocation() {
double longitude = 0.0, latitude = 0.0;
finder = new LocationFinder(this);
if (finder.canGetLocation()) {
latitude = finder.getLatitude();
longitude = finder.getLongitude();
Toast.makeText(this, "lng-lat" + longitude + " — " + latitude, Toast.LENGTH_LONG).show();
} else {
finder.showSettingsAlert();
}
}