Add animated weather data | Maps SDK | Android

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

activity_animated_imagesource

<?xml version="1.0" encoding="utf-8"?>
<com.mapbox.maps.MapView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:id="@id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:mapbox_cameraTargetLat="43.043493218594804"
mapbox:mapbox_cameraTargetLng="-76.1255491524373"
mapbox:mapbox_cameraZoom="6" />

AnimatedImageSourceActivity.kt

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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.Image
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
import java.nio.ByteBuffer
 
/**
* 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.getMapboxMap()
mapboxMap.loadStyle(
style(styleUri = Style.MAPBOX_STREETS) {
+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 ->
val byteBuffer = ByteBuffer.allocate(bitmap.byteCount)
bitmap.copyPixelsToBuffer(byteBuffer)
imageSource.updateImage(Image(bitmap.width, bitmap.height, byteBuffer.array()))
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"
}
}