Add Point Annotations | Maps SDK | Android Docs

Show point 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.
Kotlin
PointAnnotationActivity.kt
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package com.mapbox.maps.compose.testapp.examples.annotation

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
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.res.painterResource
import androidx.compose.ui.unit.dp
import com.mapbox.maps.Style
import com.mapbox.maps.compose.testapp.ExampleScaffold
import com.mapbox.maps.compose.testapp.R
import com.mapbox.maps.compose.testapp.examples.utils.CityLocations
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.PointAnnotation
import com.mapbox.maps.extension.compose.annotation.rememberIconImage
import com.mapbox.maps.extension.compose.style.MapStyle

/**
 * Example to showcase usage of point annotations with text and icon image.
 */
public class PointAnnotationActivity : ComponentActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    setContent {
      var text by remember {
        mutableStateOf("Hello!")
      }

      var markerResourceId by remember {
        mutableStateOf(R.drawable.ic_blue_marker)
      }

      MapboxMapComposeTheme {
        ExampleScaffold(
          floatingActionButton = {
            Column {
              FloatingActionButton(
                modifier = Modifier.padding(bottom = 10.dp),
                onClick = {
                  text = "$text!"
                },
                shape = RoundedCornerShape(16.dp),
              ) {
                Text(modifier = Modifier.padding(10.dp), text = "Update text field")
              }
              FloatingActionButton(
                modifier = Modifier.padding(bottom = 10.dp),
                onClick = {
                  markerResourceId =
                    if (markerResourceId == R.drawable.ic_red_marker) R.drawable.ic_blue_marker else R.drawable.ic_red_marker
                },
                shape = RoundedCornerShape(16.dp),
              ) {
                Text(modifier = Modifier.padding(10.dp), text = "Update icon image")
              }
            }
          }
        ) {
          MapboxMap(
            Modifier.fillMaxSize(),
            mapViewportState = MapViewportState().apply {
              setCameraOptions {
                zoom(ZOOM)
                center(CityLocations.HELSINKI)
              }
            },
            style = {
              MapStyle(style = Style.LIGHT)
            }
          ) {
            val marker = rememberIconImage(key = markerResourceId, painter = painterResource(markerResourceId))
            PointAnnotation(point = CityLocations.HELSINKI) {
              iconImage = marker
              textField = text
            }
          }
        }
      }
    }
  }

  private companion object {
    const val ZOOM: Double = 10.0
  }
}
この{Type}は役に立ちましたか？