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docs: demonstrate NonHierarchicalViewBasedAlgorithm for high-volume marker clustering #463

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merged 2 commits into from
Dec 20, 2023
Merged

docs: demonstrate NonHierarchicalViewBasedAlgorithm for high-volume marker clustering #463

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3b26ba4
docs: showcase usage of custom algorithm
kikoso Nov 27, 2023
94aa964
docs: switch algorithm parameters
kikoso Dec 12, 2023
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14 changes: 14 additions & 0 deletions app/src/main/java/com/google/maps/android/compose/MarkerClusteringActivity.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -31,13 +31,15 @@ import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalConfiguration
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.google.android.gms.maps.model.CameraPosition
import com.google.android.gms.maps.model.LatLng
import com.google.maps.android.clustering.ClusterItem
import com.google.maps.android.clustering.algo.NonHierarchicalViewBasedAlgorithm
import com.google.maps.android.compose.clustering.Clustering
import com.google.maps.android.compose.clustering.rememberClusterManager
import com.google.maps.android.compose.clustering.rememberClusterRenderer
Expand Down Expand Up @@ -171,7 +173,19 @@ private fun CustomUiClustering(items: List<MyItem>) {
@OptIn(MapsComposeExperimentalApi::class)
@Composable
fun CustomRendererClustering(items: List<MyItem>) {
val configuration = LocalConfiguration.current
val screenHeight = configuration.screenHeightDp.dp
val screenWidth = configuration.screenWidthDp.dp
val clusterManager = rememberClusterManager<MyItem>()

// Here the clusterManager is being customized with a NonHierarchicalViewBasedAlgorithm.
// This speeds up by a factor the rendering of items on the screen.
clusterManager?.setAlgorithm(
NonHierarchicalViewBasedAlgorithm(
screenHeight.value.toInt(),
screenWidth.value.toInt()
)
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)
val renderer = rememberClusterRenderer(
clusterContent = { cluster ->
CircleContent(
Expand Down