Skip to main content

Add animated weather data

Additional Developer Resources
Load a raster image to a style using ImageSource and display it on a map as animated weather data using RasterLayer.
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.

AnimatedImageSourceActivity.kt
github View on GitHub
package com.mapbox.maps.testapp.examples

import android.content.Context
import android.graphics.Bitmap
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.maps.MapboxMap
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.layers.generated.rasterLayer
import com.mapbox.maps.extension.style.sources.generated.ImageSource
import com.mapbox.maps.extension.style.sources.generated.imageSource
import com.mapbox.maps.extension.style.sources.getSourceAs
import com.mapbox.maps.extension.style.sources.updateImage
import com.mapbox.maps.extension.style.style
import com.mapbox.maps.testapp.R
import com.mapbox.maps.testapp.databinding.ActivityAnimatedImagesourceBinding
import com.mapbox.maps.testapp.utils.BitmapUtils.bitmapFromDrawableRes

/**
 * Load a raster image to a style using ImageSource and display it on a map as
 * animated weather data using RasterLayer.
 */
class AnimatedImageSourceActivity : AppCompatActivity() {

  private val handler: Handler = Handler(Looper.getMainLooper())
  private lateinit var mapboxMap: MapboxMap
  private lateinit var runnable: Runnable

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val binding = ActivityAnimatedImagesourceBinding.inflate(layoutInflater)
    setContentView(binding.root)
    mapboxMap = binding.mapView.mapboxMap
    mapboxMap.loadStyle(
      style(style = Style.STANDARD) {
        +imageSource(ID_IMAGE_SOURCE) {
          coordinates(
            listOf(
              listOf(-80.425, 46.437),
              listOf(-71.516, 46.437),
              listOf(-71.516, 37.936),
              listOf(-80.425, 37.936)
            )
          )
        }
        +rasterLayer(ID_IMAGE_LAYER, ID_IMAGE_SOURCE) { }
      }
    )
  }

  override fun onStart() {
    super.onStart()
    mapboxMap.getStyle {
      val imageSource: ImageSource = it.getSourceAs(ID_IMAGE_SOURCE)!!
      runnable = RefreshImageRunnable(applicationContext, imageSource, handler)
      handler.postDelayed(runnable, 100)
    }
  }

  override fun onStop() {
    super.onStop()
    if (::runnable.isInitialized) {
      handler.removeCallbacks(runnable)
    }
  }

  private class RefreshImageRunnable constructor(
    appContext: Context,
    private val imageSource: ImageSource,
    private val handler: Handler
  ) :
    Runnable {
    private val drawables: Array<Bitmap?> = arrayOfNulls(4)
    private var drawableIndex: Int

    override fun run() {
      drawables[drawableIndex++]?.let { bitmap ->
        imageSource.updateImage(bitmap)
        if (drawableIndex > 3) {
          drawableIndex = 0
        }
      }
      handler.postDelayed(this, 1000)
    }

    init {
      drawables[0] = bitmapFromDrawableRes(appContext, R.drawable.southeast_radar_0)
      drawables[1] = bitmapFromDrawableRes(appContext, R.drawable.southeast_radar_1)
      drawables[2] = bitmapFromDrawableRes(appContext, R.drawable.southeast_radar_2)
      drawables[3] = bitmapFromDrawableRes(appContext, R.drawable.southeast_radar_3)
      drawableIndex = 1
    }
  }

  companion object {
    private const val ID_IMAGE_SOURCE = "animated_image_source"
    private const val ID_IMAGE_LAYER = "animated_image_layer"
  }
}
Additional Developer Resources
Was this example helpful?