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View annotations - basic example

Add view annotation on a map click.

There are several ways to add markers, annotations, and other shapes to the map using the Maps SDK. To choose the appropriate approach for your application, read the Markers and annotations guide.

ViewAnnotationBasicAddActivity.kt
package com.mapbox.maps.testapp.examples.markersandcallouts.viewannotation

import android.annotation.SuppressLint
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.geojson.Point
import com.mapbox.maps.*
import com.mapbox.maps.plugin.animation.flyTo
import com.mapbox.maps.plugin.gestures.*
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.databinding.ActivityViewAnnotationShowcaseBinding
import com.mapbox.maps.testapp.databinding.ItemCalloutViewBinding
import com.mapbox.maps.viewannotation.ViewAnnotationManager
import com.mapbox.maps.viewannotation.ViewAnnotationUpdateMode
import com.mapbox.maps.viewannotation.geometry
import com.mapbox.maps.viewannotation.viewAnnotationOptions

/**
* Example how to add view annotations by clicking on the map.
*/
class ViewAnnotationBasicAddActivity : AppCompatActivity(), OnMapClickListener {

private lateinit var mapboxMap: MapboxMap
private lateinit var viewAnnotationManager: ViewAnnotationManager
private val viewAnnotationViews = mutableListOf<View>()

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val binding = ActivityViewAnnotationShowcaseBinding.inflate(layoutInflater)
setContentView(binding.root)

viewAnnotationManager = binding.mapView.viewAnnotationManager

mapboxMap = binding.mapView.mapboxMap.apply {
loadStyle(Style.STANDARD) {
addOnMapClickListener(this@ViewAnnotationBasicAddActivity)
binding.fabStyleToggle.setOnClickListener {
when (style?.styleURI) {
Style.STANDARD -> loadStyle(Style.SATELLITE_STREETS)
Style.SATELLITE_STREETS -> loadStyle(Style.STANDARD)
}
}
Toast.makeText(this@ViewAnnotationBasicAddActivity, STARTUP_TEXT, Toast.LENGTH_LONG).show()
}
}

binding.fabReframe.setOnClickListener {
if (viewAnnotationViews.isNotEmpty()) {
val cameraOptions = viewAnnotationManager.cameraForAnnotations(viewAnnotationViews)
cameraOptions?.let {
mapboxMap.flyTo(it)
}
} else {
Toast.makeText(this@ViewAnnotationBasicAddActivity, ADD_VIEW_ANNOTATION_TEXT, Toast.LENGTH_LONG).show()
}
}
}

override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.menu_view_annotation, menu)
return true
}

override fun onOptionsItemSelected(item: MenuItem): Boolean {
return when (item.itemId) {
R.id.action_view_annotation_fixed_delay -> {
viewAnnotationManager.setViewAnnotationUpdateMode(ViewAnnotationUpdateMode.MAP_FIXED_DELAY)
true
}
R.id.action_view_annotation_map_synchronized -> {
viewAnnotationManager.setViewAnnotationUpdateMode(ViewAnnotationUpdateMode.MAP_SYNCHRONIZED)
true
}
else -> super.onOptionsItemSelected(item)
}
}

override fun onMapClick(point: Point): Boolean {
addViewAnnotation(point)
return true
}

@SuppressLint("SetTextI18n")
private fun addViewAnnotation(point: Point) {
val viewAnnotation = viewAnnotationManager.addViewAnnotation(
resId = R.layout.item_callout_view,
options = viewAnnotationOptions {
geometry(point)
allowOverlap(true)
ignoreCameraPadding(true)
allowOverlapWithPuck(true)
}
)
viewAnnotationViews.add(viewAnnotation)
ItemCalloutViewBinding.bind(viewAnnotation).apply {
textNativeView.text = "lat=%.2f\nlon=%.2f".format(point.latitude(), point.longitude())
closeNativeView.setOnClickListener {
viewAnnotationManager.removeViewAnnotation(viewAnnotation)
viewAnnotationViews.remove(viewAnnotation)
}
selectButton.setOnClickListener { b ->
val button = b as Button
val isSelected = button.text.toString().equals("SELECT", true)
val pxDelta = if (isSelected) SELECTED_ADD_COEF_PX else -SELECTED_ADD_COEF_PX
button.text = if (isSelected) "DESELECT" else "SELECT"
viewAnnotationManager.updateViewAnnotation(
viewAnnotation,
viewAnnotationOptions {
selected(isSelected)
}
)
(button.layoutParams as ViewGroup.MarginLayoutParams).apply {
bottomMargin += pxDelta
rightMargin += pxDelta
leftMargin += pxDelta
}
button.requestLayout()
}
}
}

private companion object {
const val SELECTED_ADD_COEF_PX = 25
const val STARTUP_TEXT = "Click on a map to add a view annotation."
const val ADD_VIEW_ANNOTATION_TEXT = "Add view annotations to re-frame map camera"
}
}
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