Tracking device location for Android

import android.annotation.SuppressLint;
import android.location.Location;
import android.util.Log;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.annotation.NonNull;
// Classes needed to initialize the map
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
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/**
* Use the Mapbox Core Library to listen to device location updates
*/
public class MainActivity extends AppCompatActivity implements
OnMapReadyCallback, PermissionsListener {
// Variables needed to initialize a map
private MapboxMap mapboxMap;
private MapView mapView;
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@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
 
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the mapview.
Mapbox.getInstance(this, getString(R.string.mapbox_access_token));
 
// This contains the MapView in XML and needs to be called after the access token is configured.
setContentView(R.layout.activity_main);
 
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
 
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
this.mapboxMap = mapboxMap;
 
mapboxMap.setStyle(Style.TRAFFIC_NIGHT,
new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
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}
});
}
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@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
 
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
 
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
 
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
 
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
 
@Override
protected void onDestroy() {
super.onDestroy();
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mapView.onDestroy();
}
 
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
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// Classes needed to handle location permissions 
import com.mapbox.android.core.permissions.PermissionsListener;
import com.mapbox.android.core.permissions.PermissionsManager;
import java.util.List;
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// Variables needed to handle location permissions 
private PermissionsManager permissionsManager;
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/**
* Initialize the Maps SDK's LocationComponent
*/
@SuppressWarnings( {"MissingPermission"})
private void enableLocationComponent(@NonNull Style loadedMapStyle) {
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}
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@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
permissionsManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
 
@Override
public void onExplanationNeeded(List<String> permissionsToExplain) {
Toast.makeText(this, R.string.user_location_permission_explanation, Toast.LENGTH_LONG).show();
}
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@Override
public void onPermissionResult(boolean granted) {
if (granted) {
if (mapboxMap.getStyle() != null) {
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}
} else {
Toast.makeText(this, R.string.user_location_permission_not_granted, Toast.LENGTH_LONG).show();
finish();
}
}
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// Check if permissions are enabled and if not request
if (PermissionsManager.areLocationPermissionsGranted(this)) {
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} else {
permissionsManager = new PermissionsManager(this);
permissionsManager.requestLocationPermissions(this);
}
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// Classes needed to add the location engine
import com.mapbox.android.core.location.LocationEngine;
import com.mapbox.android.core.location.LocationEngineCallback;
import com.mapbox.android.core.location.LocationEngineProvider;
import com.mapbox.android.core.location.LocationEngineRequest;
import com.mapbox.android.core.location.LocationEngineResult;
import java.lang.ref.WeakReference;
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// Variables needed to add the location engine
private LocationEngine locationEngine;
private long DEFAULT_INTERVAL_IN_MILLISECONDS = 1000L;
private long DEFAULT_MAX_WAIT_TIME = DEFAULT_INTERVAL_IN_MILLISECONDS * 5;
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/**
* Set up the LocationEngine and the parameters for querying the device's location
*/
@SuppressLint("MissingPermission")
private void initLocationEngine() {
locationEngine = LocationEngineProvider.getBestLocationEngine(this);
 
LocationEngineRequest request = new LocationEngineRequest.Builder(DEFAULT_INTERVAL_IN_MILLISECONDS)
.setPriority(LocationEngineRequest.PRIORITY_HIGH_ACCURACY)
.setMaxWaitTime(DEFAULT_MAX_WAIT_TIME).build();
 
locationEngine.requestLocationUpdates(request, callback, getMainLooper());
locationEngine.getLastLocation(callback);
}
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// Prevent leaks
if (locationEngine != null) {
locationEngine.removeLocationUpdates(callback);
}
mapView.onDestroy();
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// Classes needed to add the location component
import com.mapbox.mapboxsdk.location.LocationComponent;
import com.mapbox.mapboxsdk.location.LocationComponentActivationOptions;
import com.mapbox.mapboxsdk.location.modes.CameraMode;
import com.mapbox.mapboxsdk.location.modes.RenderMode;
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enableLocationComponent(style);
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// Get an instance of the component
LocationComponent locationComponent = mapboxMap.getLocationComponent();
 
// Set the LocationComponent activation options
LocationComponentActivationOptions locationComponentActivationOptions =
LocationComponentActivationOptions.builder(this, loadedMapStyle)
.useDefaultLocationEngine(false)
.build();
 
// Activate with the LocationComponentActivationOptions object
locationComponent.activateLocationComponent(locationComponentActivationOptions);
 
// Enable to make component visible
locationComponent.setLocationComponentEnabled(true);
 
// Set the component's camera mode
locationComponent.setCameraMode(CameraMode.TRACKING);
 
// Set the component's render mode
locationComponent.setRenderMode(RenderMode.COMPASS);
 
initLocationEngine();
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enableLocationComponent(mapboxMap.getStyle());
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// Variables needed to listen to location updates
private MainActivityLocationCallback callback = new MainActivityLocationCallback(this);
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private static class MainActivityLocationCallback
implements LocationEngineCallback<LocationEngineResult> {
 
private final WeakReference<MainActivity> activityWeakReference;
 
MainActivityLocationCallback(MainActivity activity) {
this.activityWeakReference = new WeakReference<>(activity);
}
 
/**
* The LocationEngineCallback interface's method which fires when the device's location has changed.
*
* @param result the LocationEngineResult object which has the last known location within it.
*/
@Override
public void onSuccess(LocationEngineResult result) {
MainActivity activity = activityWeakReference.get();
 
if (activity != null) {
Location location = result.getLastLocation();
 
if (location == null) {
return;
}
 
// Create a Toast which displays the new location's coordinates
Toast.makeText(activity, String.format(activity.getString(R.string.new_location),
String.valueOf(result.getLastLocation().getLatitude()), String.valueOf(result.getLastLocation().getLongitude())),
Toast.LENGTH_SHORT).show();
 
// Pass the new location to the Maps SDK's LocationComponent
if (activity.mapboxMap != null && result.getLastLocation() != null) {
activity.mapboxMap.getLocationComponent().forceLocationUpdate(result.getLastLocation());
}
}
}
 
/**
* The LocationEngineCallback interface's method which fires when the device's location can not be captured
*
* @param exception the exception message
*/
@Override
public void onFailure(@NonNull Exception exception) {
Log.d("LocationChangeActivity", exception.getLocalizedMessage());
MainActivity activity = activityWeakReference.get();
if (activity != null) {
Toast.makeText(activity, exception.getLocalizedMessage(),
Toast.LENGTH_SHORT).show();
}
}
}
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