Display the user's location

package com.mapbox.maps.testapp.examples
 
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.content.res.AppCompatResources
import com.mapbox.android.gestures.MoveGestureDetector
import com.mapbox.maps.CameraOptions
import com.mapbox.maps.MapView
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.expressions.dsl.generated.interpolate
import com.mapbox.maps.plugin.LocationPuck2D
import com.mapbox.maps.plugin.gestures.OnMoveListener
import com.mapbox.maps.plugin.gestures.gestures
import com.mapbox.maps.plugin.locationcomponent.OnIndicatorBearingChangedListener
import com.mapbox.maps.plugin.locationcomponent.OnIndicatorPositionChangedListener
import com.mapbox.maps.plugin.locationcomponent.location
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.utils.LocationPermissionHelper
import java.lang.ref.WeakReference
 
/**
* Tracks the user location on screen, simulates a navigation session.
*/
class LocationTrackingActivity : AppCompatActivity() {
 
private lateinit var locationPermissionHelper: LocationPermissionHelper
 
private val onIndicatorBearingChangedListener = OnIndicatorBearingChangedListener {
mapView.getMapboxMap().setCamera(CameraOptions.Builder().bearing(it).build())
}
 
private val onIndicatorPositionChangedListener = OnIndicatorPositionChangedListener {
mapView.getMapboxMap().setCamera(CameraOptions.Builder().center(it).build())
mapView.gestures.focalPoint = mapView.getMapboxMap().pixelForCoordinate(it)
}
 
private val onMoveListener = object : OnMoveListener {
override fun onMoveBegin(detector: MoveGestureDetector) {
onCameraTrackingDismissed()
}
 
override fun onMove(detector: MoveGestureDetector): Boolean {
return false
}
 
override fun onMoveEnd(detector: MoveGestureDetector) {}
}
private lateinit var mapView: MapView
 
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
mapView = MapView(this)
setContentView(mapView)
locationPermissionHelper = LocationPermissionHelper(WeakReference(this))
locationPermissionHelper.checkPermissions {
onMapReady()
}
}
 
private fun onMapReady() {
mapView.getMapboxMap().setCamera(
CameraOptions.Builder()
.zoom(14.0)
.build()
)
mapView.getMapboxMap().loadStyleUri(
Style.MAPBOX_STREETS
) {
initLocationComponent()
setupGesturesListener()
}
}
 
private fun setupGesturesListener() {
mapView.gestures.addOnMoveListener(onMoveListener)
}
 
private fun initLocationComponent() {
val locationComponentPlugin = mapView.location
locationComponentPlugin.updateSettings {
this.enabled = true
this.locationPuck = LocationPuck2D(
bearingImage = AppCompatResources.getDrawable(
this@LocationTrackingActivity,
R.drawable.mapbox_user_puck_icon,
),
shadowImage = AppCompatResources.getDrawable(
this@LocationTrackingActivity,
R.drawable.mapbox_user_icon_shadow,
),
scaleExpression = interpolate {
linear()
zoom()
stop {
literal(0.0)
literal(0.6)
}
stop {
literal(20.0)
literal(1.0)
}
}.toJson()
)
}
locationComponentPlugin.addOnIndicatorPositionChangedListener(onIndicatorPositionChangedListener)
locationComponentPlugin.addOnIndicatorBearingChangedListener(onIndicatorBearingChangedListener)
}
 
private fun onCameraTrackingDismissed() {
Toast.makeText(this, "onCameraTrackingDismissed", Toast.LENGTH_SHORT).show()
mapView.location
.removeOnIndicatorPositionChangedListener(onIndicatorPositionChangedListener)
mapView.location
.removeOnIndicatorBearingChangedListener(onIndicatorBearingChangedListener)
mapView.gestures.removeOnMoveListener(onMoveListener)
}
 
override fun onDestroy() {
super.onDestroy()
mapView.location
.removeOnIndicatorBearingChangedListener(onIndicatorBearingChangedListener)
mapView.location
.removeOnIndicatorPositionChangedListener(onIndicatorPositionChangedListener)
mapView.gestures.removeOnMoveListener(onMoveListener)
}
 
override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<String>,
grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
locationPermissionHelper.onRequestPermissionsResult(requestCode, permissions, grantResults)
}
}