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Add Polygon Annotations

Additional Developer Resources
Show polygon annotations on a map.

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.

PolygonAnnotationActivity.kt
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package com.mapbox.maps.compose.testapp.examples.annotation

import android.os.Bundle
import android.widget.Toast
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.FloatingActionButton
import androidx.compose.material.Text
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import com.mapbox.geojson.Point
import com.mapbox.maps.Style
import com.mapbox.maps.compose.testapp.ExampleScaffold
import com.mapbox.maps.compose.testapp.ui.theme.MapboxMapComposeTheme
import com.mapbox.maps.extension.compose.MapboxMap
import com.mapbox.maps.extension.compose.animation.viewport.MapViewportState
import com.mapbox.maps.extension.compose.annotation.generated.PolygonAnnotation
import com.mapbox.maps.extension.compose.style.MapStyle

/**
 * Example to showcase usage of PolygonAnnotation with Jetpack Compose.
 */
public class PolygonAnnotationActivity : ComponentActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContent {
      var color by remember {
        mutableStateOf(Color.Red)
      }
      MapboxMapComposeTheme {
        ExampleScaffold(
          floatingActionButton = {
            FloatingActionButton(
              modifier = Modifier.padding(bottom = 10.dp),
              onClick = {
                color = if (color == Color.Red) Color.Blue else Color.Red
              },
              shape = RoundedCornerShape(16.dp),
            ) {
              Text(modifier = Modifier.padding(10.dp), text = "Toggle color")
            }
          }
        ) {
          MapboxMap(
            Modifier.fillMaxSize(),
            mapViewportState = MapViewportState().apply {
              setCameraOptions {
                zoom(ZOOM)
                center(CAMERA_CENTER)
              }
            },
            style = {
              MapStyle(style = Style.LIGHT)
            },
          ) {
            PolygonAnnotation(
              points = POLYGON_POINTS,
              onClick = {
                Toast.makeText(
                  this@PolygonAnnotationActivity,
                  "Clicked on Polygon Annotation: $it",
                  Toast.LENGTH_SHORT
                ).show()
                true
              }
            ) {
              fillColor = color
            }
          }
        }
      }
    }
  }

  private companion object {
    const val ZOOM: Double = 5.0
    val CAMERA_CENTER: Point = Point.fromLngLat(-88.90136, 25.04579)
    val POLYGON_POINTS = listOf(
      listOf(
        Point.fromLngLat(-89.857177734375, 24.51713945052515),
        Point.fromLngLat(-87.967529296875, 24.51713945052515),
        Point.fromLngLat(-87.967529296875, 26.244156283890756),
        Point.fromLngLat(-89.857177734375, 26.244156283890756),
        Point.fromLngLat(-89.857177734375, 24.51713945052515)
      )
    )
  }
}
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