View annotation with point annotation
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.
Android Examples App Available
This example code is part of the Maps SDK for Android Examples App, a working Android project available on GitHub. Android developers are encouraged to run the examples app locally to interact with this example in an emulator and explore other features of the Maps SDK.
See our Run the Maps SDK for Android Examples App tutorial for step-by-step instructions.
ViewAnnotationWithPointAnnotationActivity.kt
package com.mapbox.maps.testapp.examples.markersandcallouts.viewannotation
import android.annotation.SuppressLint
import android.graphics.Bitmap
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 androidx.appcompat.app.AppCompatActivity
import androidx.core.view.isVisible
import com.mapbox.geojson.Point
import com.mapbox.maps.CameraOptions
import com.mapbox.maps.MapView
import com.mapbox.maps.Style
import com.mapbox.maps.ViewAnnotationAnchor
import com.mapbox.maps.extension.style.layers.properties.generated.IconAnchor
import com.mapbox.maps.plugin.annotation.Annotation
import com.mapbox.maps.plugin.annotation.AnnotationConfig
import com.mapbox.maps.plugin.annotation.annotations
import com.mapbox.maps.plugin.annotation.generated.*
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.databinding.ActivityViewAnnotationShowcaseBinding
import com.mapbox.maps.testapp.databinding.ItemCalloutViewBinding
import com.mapbox.maps.testapp.utils.BitmapUtils
import com.mapbox.maps.viewannotation.ViewAnnotationManager
import com.mapbox.maps.viewannotation.ViewAnnotationUpdateMode
import com.mapbox.maps.viewannotation.annotationAnchor
import com.mapbox.maps.viewannotation.geometry
import com.mapbox.maps.viewannotation.viewAnnotationOptions
/**
* Example how to add view annotation to the point annotation.
*/
class ViewAnnotationWithPointAnnotationActivity : AppCompatActivity() {
private lateinit var viewAnnotationManager: ViewAnnotationManager
private lateinit var pointAnnotationManager: PointAnnotationManager
private lateinit var pointAnnotation: PointAnnotation
private lateinit var viewAnnotation: View
private lateinit var binding: ActivityViewAnnotationShowcaseBinding
@SuppressLint("SetTextI18n")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityViewAnnotationShowcaseBinding.inflate(layoutInflater)
setContentView(binding.root)
val iconBitmap = BitmapUtils.bitmapFromDrawableRes(
this@ViewAnnotationWithPointAnnotationActivity,
R.drawable.ic_blue_marker
)!!
viewAnnotationManager = binding.mapView.viewAnnotationManager
resetCamera()
binding.mapView.mapboxMap.loadStyle(Style.STANDARD) {
prepareAnnotationMarker(binding.mapView, iconBitmap)
prepareViewAnnotation()
// show / hide view annotation based on a marker click
pointAnnotationManager.addClickListener { clickedAnnotation ->
if (pointAnnotation == clickedAnnotation) {
viewAnnotation.toggleViewVisibility()
}
true
}
// show / hide view annotation based on marker visibility
binding.fabStyleToggle.setOnClickListener {
if (pointAnnotation.iconImage == null) {
pointAnnotation.iconImageBitmap = iconBitmap
viewAnnotation.isVisible = true
} else {
pointAnnotation.iconImageBitmap = null
viewAnnotation.isVisible = false
}
pointAnnotationManager.update(pointAnnotation)
}
// reset annotations and camera position
binding.fabReframe.setOnClickListener {
resetCamera()
pointAnnotation.point = POINT
pointAnnotationManager.update(pointAnnotation)
syncAnnotationPosition()
}
// update view annotation geometry if dragging the marker
pointAnnotationManager.addDragListener(object : OnPointAnnotationDragListener {
override fun onAnnotationDragStarted(annotation: Annotation<*>) {
}
override fun onAnnotationDrag(annotation: Annotation<*>) {
if (annotation == pointAnnotation) {
syncAnnotationPosition()
}
}
override fun onAnnotationDragFinished(annotation: Annotation<*>) {
}
})
}
}
private fun resetCamera() {
binding.mapView.mapboxMap.setCamera(
CameraOptions.Builder()
.center(POINT)
.pitch(45.0)
.zoom(12.5)
.bearing(-17.6)
.build()
)
}
private fun syncAnnotationPosition() {
viewAnnotationManager.updateViewAnnotation(
viewAnnotation,
viewAnnotationOptions {
geometry(pointAnnotation.geometry)
}
)
ItemCalloutViewBinding.bind(viewAnnotation).apply {
textNativeView.text = "lat=%.2f\nlon=%.2f".format(
pointAnnotation.geometry.latitude(),
pointAnnotation.geometry.longitude()
)
}
}
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)
}
}
private fun View.toggleViewVisibility() {
visibility = if (visibility == View.VISIBLE) View.GONE else View.VISIBLE
}
@SuppressLint("SetTextI18n")
private fun prepareViewAnnotation() {
viewAnnotation = viewAnnotationManager.addViewAnnotation(
resId = R.layout.item_callout_view,
options = viewAnnotationOptions {
geometry(pointAnnotation.geometry)
annotationAnchor {
anchor(ViewAnnotationAnchor.BOTTOM)
offsetY((pointAnnotation.iconImageBitmap?.height!!.toDouble()))
}
}
)
ItemCalloutViewBinding.bind(viewAnnotation).apply {
textNativeView.text = "lat=%.2f\nlon=%.2f".format(POINT.latitude(), POINT.longitude())
closeNativeView.setOnClickListener {
viewAnnotationManager.removeViewAnnotation(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 fun prepareAnnotationMarker(mapView: MapView, iconBitmap: Bitmap) {
val annotationPlugin = mapView.annotations
val pointAnnotationOptions: PointAnnotationOptions = PointAnnotationOptions()
.withPoint(POINT)
.withIconImage(iconBitmap)
.withIconAnchor(IconAnchor.BOTTOM)
.withDraggable(true)
pointAnnotationManager = annotationPlugin.createPointAnnotationManager(
AnnotationConfig(
layerId = LAYER_ID
)
)
pointAnnotation = pointAnnotationManager.create(pointAnnotationOptions)
}
private companion object {
const val SELECTED_ADD_COEF_PX = 25
val POINT: Point = Point.fromLngLat(0.381457, 6.687337)
val LAYER_ID = "layer-id"
}
}
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