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How can I get continuous location updates in android, like on Google Maps?

I am creating an Android application to track friends. While my friend activated the application and left with his GPS and cellular data, I need to track it on my device. This is a concept.

I have implemented the LocationListener class, and now I can get the latest updated location either from Gps or from the network, but it does not update if I do not start Google Maps and return to my application. After googling, I found out that the location cache is only updated with GMaps.!

  • Is there an alternative way to keep location updated?
  • What if I need to get the location after locking the device without using Wakelock?

This is my listener class of my location:

package com.amazinginside;

/** AMAZING LOCATION SUPPORT CLASS, Devoloped By SANGEETH NANDAKUMAR */

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;

public class AmazingLocation extends Service implements LocationListener
{
    private final Context mContext;
    boolean isGPSEnabled = false;
    boolean isNetworkEnabled = false;
    boolean canGetLocation = false;

    Location location;
    double latitude=0.0;
    double longitude=0.0;

    //MINIMUM DISTANCE FOR UPDATE (meters)
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0; // 0 Meters

    //MINIMUM TIME BETWEEN UPDATES
    private static final long MIN_TIME_BW_UPDATES = 1000 * 0; // 0 Seconds

    //LOCATION MANAGER
    protected LocationManager locationManager;

    //CONSTRUCTOR
    public AmazingLocation(Context context)
    {
        this.mContext = context;
        getLocation();
    }

    //LOCATION PROVISION
    public Location getLocation()
    {
        try
        {
            //GET LOCATION MANAGER
            locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
            //CHECK GPS STATE
            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
            //CHECK NETWORK STATE
            isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled && !isNetworkEnabled)
            {
                //NO LOCATION PROVIDERS
            }
            else
            {
                this.canGetLocation = true;

                /** GET LOCATION FROM NETWORK */
                //FIRST GET LOCATION FROM NETWORK
                if (isNetworkEnabled)
                {
                    //REQUEST LOCATION
                    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    if (locationManager != null)
                    {
                        //START WITH LAST KNOWN LOCATION
                        location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        //EXTRACT LOCATION
                        if (location != null)
                        {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }

                /** GET LOCATION FROM GPS SENSOR */
                //THEN GET LOCATION FROM GPS
                if (isGPSEnabled)
                {
                    if (location == null)
                    {
                        //REQUEST GPS LOCATION
                        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                        if (locationManager != null)
                        {
                            //EXTRACT LAST KNOWN LOCATION
                            location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            //RETURN LOCATION
                            if (location != null)
                            {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                }
            }

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

        return location;
    }

    //STOP GPS SENSOR
    public void stopUsingGPS()
    {
        if(locationManager != null)
        {
            locationManager.removeUpdates(AmazingLocation.this);
        }
    }

    //EXTRACT LATTITUDE
    public double getLatitude()
    {
        if(location != null)
        {
            latitude = location.getLatitude();
        }

        // return latitude
        return latitude;
    }

    //EXTACT LONGITUDE
    public double getLongitude()
    {
        if(location != null)
        {
            longitude = location.getLongitude();
        }

        // return longitude
        return longitude;
    }

    //CAN I GET THE LOCATION.?
    public AmazingStatus canGetLocation()
    {
        AmazingStatus status=new AmazingStatus();
        if(this.canGetLocation)
        {
            status.setStatus(true);
            status.setErrorcode(0);
            status.setErrormsg("Task completed");
        }
        else
        {
            status.setStatus(false);
            status.setErrorcode(145);
            status.setErrormsg("Please turn on GPS access manually");
        }
        return status;
    }

    //SHOW LOCATION SETTINGS
    public AmazingStatus showSettingsAlert()
    {
        final AmazingStatus status=new AmazingStatus();
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
        alertDialog.setTitle("REQUIRES LOCATION ACCESS");
        alertDialog.setMessage("Please allow GPS access to this app");

        //POSSITIVE REPLY
        alertDialog.setPositiveButton("Allow", new DialogInterface.OnClickListener()
        {
            public void onClick(DialogInterface dialog,int which)
            {
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                mContext.startActivity(intent);
                status.setStatus(true);
                status.setErrorcode(0);
                status.setErrormsg("Task completed");
            }
        });

        //NEGATIVE REPLY
        alertDialog.setNegativeButton("Deny", new DialogInterface.OnClickListener()
        {
            public void onClick(DialogInterface dialog, int which)
            {
                status.setStatus(false);
                status.setErrorcode(408);
                status.setErrormsg("User denied permission");
                dialog.cancel();
            }
        });

        // Showing Alert Message
        alertDialog.show();
        return status;
    }

    //UNUSED OVERRIDE METHORDS...
    @Override
    public void onLocationChanged(Location location)
    {
        getLocation();
    }

    @Override
    public void onProviderDisabled(String provider)
    {
    }

    @Override
    public void onProviderEnabled(String provider)
    {
        getLocation();
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras)
    {
        getLocation();
    }

    @Override
    public IBinder onBind(Intent arg0)
    {
        return null;
    }

}

onCreate():

@Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //CREATE A BUTTON HANDLER
    Button start_btn=(Button)findViewById(R.id.start_location_streaming);
    //ON BUTTON CLICK EVENT
    start_btn.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            //REPEAT A METHORD AT SPECIFIC INTERVALS
            Timer myTimer = new Timer();
            myTimer.schedule(new TimerTask()
            {
                @Override
                public void run()
                {
                    TimerMethod();
                }

            }, 0, 8000);
        }
    });  }

:

private void TimerMethod()
{
    //START METHORD
    this.runOnUiThread(Timer_Tick);
}

//LOCATION REPORTING METHORD
private Runnable Timer_Tick = new Runnable()
{
    public void run()
    {
        Toast.makeText(MainActivity.this, "Current latitude : "+Double.toString(getLocation().latitude), Toast.LENGTH_SHORT).show();
        Toast.makeText(MainActivity.this, "Current longitude : "+Double.toString(getLocation().longitude), Toast.LENGTH_SHORT).show();
    }
};

private LatLng getLocation()
{
    //CREATE A LOCATION CLASS INSTANCE
    AmazingLocation gps = new AmazingLocation(this);
    //RETRIVE LOCATION
    double latitude = gps.getLatitude();
    double longitude = gps.getLongitude();
    //RETURN LOCATION
    LatLng loc=new LatLng(latitude,longitude);
    return loc;
}

, , Google .

.

+7
6

Android, :

:

public class LocationActivity extends Activity implements
        LocationListener,
        GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener {

    private static final String TAG = "LocationActivity";
    private static final long INTERVAL = 1000 * 10;
    private static final long FASTEST_INTERVAL = 1000 * 5;
    Button btnFusedLocation;
    TextView tvLocation;
    LocationRequest mLocationRequest;
    GoogleApiClient mGoogleApiClient;
    Location mCurrentLocation;
    String mLastUpdateTime;

    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(INTERVAL);
        mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG, "onCreate ...............................");
        //show error dialog if GoolglePlayServices not available
        if (!isGooglePlayServicesAvailable()) {
            finish();
        }
        createLocationRequest();
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

        setContentView(R.layout.activity_main);
        tvLocation = (TextView) findViewById(R.id.tvLocation);

        btnFusedLocation = (Button) findViewById(R.id.btnShowLocation);
        btnFusedLocation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                updateUI();
            }
        });

    }

    @Override
    public void onStart() {
        super.onStart();
        if (mGoogleApiClient.isConnected()) {
            startLocationUpdates();
            Log.d(TAG, "Location update resumed .....................");
        }
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.d(TAG, "onStop fired ..............");
        mGoogleApiClient.disconnect();
        Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected());
    }

    private boolean isGooglePlayServicesAvailable() {
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
        if (ConnectionResult.SUCCESS == status) {
            return true;
        } else {
            GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
            return false;
        }
    }

    @Override
    public void onConnected(Bundle bundle) {
        Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
        startLocationUpdates();
    }

    protected void startLocationUpdates() {
        PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
                mGoogleApiClient, mLocationRequest, this);
        Log.d(TAG, "Location update started ..............: ");
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.d(TAG, "Connection failed: " + connectionResult.toString());
    }

    @Override
    public void onLocationChanged(Location location) {
        Log.d(TAG, "Firing onLocationChanged..............................................");
        mCurrentLocation = location;
        mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
        updateUI();
    }

    private void updateUI() {
        Log.d(TAG, "UI update initiated .............");
        if (null != mCurrentLocation) {
            String lat = String.valueOf(mCurrentLocation.getLatitude());
            String lng = String.valueOf(mCurrentLocation.getLongitude());
            tvLocation.setText("At Time: " + mLastUpdateTime + "\n" +
                    "Latitude: " + lat + "\n" +
                    "Longitude: " + lng + "\n" +
                    "Accuracy: " + mCurrentLocation.getAccuracy() + "\n" +
                    "Provider: " + mCurrentLocation.getProvider());
        } else {
            Log.d(TAG, "location is null ...............");
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        stopLocationUpdates();
    }

    protected void stopLocationUpdates() {
        LocationServices.FusedLocationApi.removeLocationUpdates(
                mGoogleApiClient, this);
        Log.d(TAG, "Location update stopped .......................");
    }

    @Override
    public void onResume() {
        super.onResume();
        if (mGoogleApiClient.isConnected()) {
            startLocationUpdates();
            Log.d(TAG, "Location update resumed .....................");
        }
    }
}

Google:

+25

, , , , . SmartLocation. build.gradle(app), .

compile 'io.nlopez.smartlocation:library:3.2.9'

, .

.

Button start_btn=(Button)findViewById(R.id.start_location_streaming);

Context context = start_btn.getContext();

Handler handler = new Handler();

start_btn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        SmartLocation.with(context).location().start(locationListener);
    }
});

OnLocationUpdatedListener locationListener = new OnLocationUpdatedListener({
    @Override
    public void onLocationUpdated(Location location) {
        double lat = location.getLatitude();
        double lng = location.getLongitude();
        handler.postDelayed(locationRunnable,8000);
    }
});

Runnable locationRunnable = new Runnable({
    @Override
    public void run() {
        SmartLocation.with(context).location().start(locationListener);
    }
});

onStop()

@Override
public void onStop() {
    SmartLocation.with(context).location().stop();
    super.onStop();
}

SmartLocation , , .

. , ACCESS_FINE_LOCATION ACCESS_COARSE_LOCATION (), . Android 6.0 .

+4

. GPSTracker. , . http://gabesechansoftware.com/location-tracking/ , (ProviderLocationTracker FallbackLocationTracker).

0

Want to get user locations without using GPS or ON (without any permission) every 30 minutes. and send it by email at the end of the day, and save it in a database. Any help would be great for me. I am new to Android. suggest a code.

0
source

Source: https://habr.com/ru/post/1665962/

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