As warned by our friend in the comments, I decided to improve the answer by posting two ways to capture GPS, using GoogleApiClient and using LocationManager . Under the conditions of Android 6.0 (Api level 23) there is the Requesting Permissions at Run Time which issue of permissions, which is very interesting you give read and learn more.
1. Google Location API
Location APIs make it easy to build applications with science
location and low power consumption. Like Google Maps Android
API, the Location API is distributed as part of the Google Play SDK
Services.
Main class
public class Main extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
GoogleApiClient mapGoogleApiClient;
EditText edtLat;
EditText edtLog;
Button btLocalizacao;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_get_localization);
edtLat = (EditText) findViewById(R.id.et1);
edtLog = (EditText) findViewById(R.id.et2);
btLocalizacao = (Button) findViewById(R.id.btLocalizacao);
if (mapGoogleApiClient == null) {
mapGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
btLocalizacao.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (GetLocalization(Main.this)) {
if (ActivityCompat.checkSelfPermission(Main.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(Main.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
return;
}
Location location = LocationServices.FusedLocationApi.getLastLocation(mapGoogleApiClient);
if (location != null) {
edtLat.setText(String.valueOf(location.getLatitude()));
edtLog.setText(String.valueOf(location.getLongitude()));
} else {
showSettingsAlert();
}
}
}
});
}
@Override
protected void onResume() {
super.onResume();
mapGoogleApiClient.connect();
}
@Override
protected void onPause() {
super.onPause();
if (mapGoogleApiClient.isConnected()) {
mapGoogleApiClient.disconnect();
}
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
public boolean GetLocalization(Context context){
int REQUEST_PERMISSION_LOCALIZATION = 221;
boolean res=true;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
res = false;
ActivityCompat.requestPermissions((Activity) context, new String[]{
Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_PERMISSION_LOCALIZATION);
}
}
return res;
}
/**
* Este metodo exite uma alerta para configuração do GPS
*/
public void showSettingsAlert(){
android.app.AlertDialog.Builder alertDialog = new android.app.AlertDialog.Builder(Main.this);
// Titulo do dialogo
alertDialog.setTitle("GPS");
// Mensagem do dialogo
alertDialog.setMessage("GPS não está habilitado. Deseja configurar?");
// On pressing Settings button
alertDialog.setPositiveButton("Configurar", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
Main.this.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// visualizacao do dialogo
alertDialog.show();
}
}
2. LocationManager
I did some testing and created a class called ObtainGPS to solve your problem, which would capture its current location (latitude / longitude). It also has a showSettingsAlert() method that verifies that the device's GPS is enabled, if not enabled, the app directs you to configure / enable it.
Well, on Main you just need to declare ObtainGPS in addition to creating a GetLocalization method. Then it would look like this:
Main class
public class Main extends AppCompatActivity {
ObtainGPS gps;
Button btLocalizacao;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_get_localization);
btLocalizacao = (Button) findViewById(R.id.button3);
btLocalizacao.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getLocalization();
}
});
}
public void getLocalization() {
gps = new ObtainGPS(Main.this);
if (GetLocalization(Main.this)) {
// check if GPS enabled
if (gps.canGetLocation()) {
AlertDialog erroLocation = new AlertDialog.Builder(this).create();
erroLocation.setTitle("Localização");
erroLocation.setMessage("Lat:" + gps.getLatitude() + " Lng:" + gps.getLongitude());
erroLocation.show();
} else {
AlertDialog erroLocation = new AlertDialog.Builder(this).create();
erroLocation.setTitle("Localização não encontrada");
erroLocation.setMessage("Sua Localização não foi encontrada!! Tente novamente!");
erroLocation.show();
gps.showSettingsAlert();
}
}
}
public boolean GetLocalization(Context context) {
int REQUEST_PERMISSION_LOCALIZATION = 221;
boolean res = true;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// public void requestPermissions(@NonNull String[] permissions, int requestCode)
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
res = false;
ActivityCompat.requestPermissions((Activity) context, new String[]{
Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_PERMISSION_LOCALIZATION);
}
}
return res;
}
}
One comment I'm using here is getLastKnownLocation
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
ObtainGPS class
public class ObtainGPS extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
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 = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public ObtainGPS(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.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
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// public void requestPermissions(@NonNull String[] permissions, int requestCode)
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
return null;
}
}
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// 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.d("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;
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS");
// Setting Dialog Message
alertDialog.setMessage("GPS não está habilitado. Você deseja configura-lo?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
Screenshots
Icreated a repository in Github named obtgps picking lambs using two shapes. You can download the project and do the proper checks.
Details
