app/build.gradle.kts

@@ -119,6 +119,11 @@ dependencies {
 
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.0")
 
+    // Ktor
+    val ktor_version = "2.3.1"
+    implementation("io.ktor:ktor-client-core:$ktor_version")
+    implementation("io.ktor:ktor-client-cio:$ktor_version")
+
     // Map Compose library
     implementation("ovh.plrapps:mapcompose:2.7.1")
 }

app/src/main/java/ru/nm17/narodmon/ui/pages/Sensors.kt

@@ -3,6 +3,7 @@ package ru.nm17.narodmon.ui.pages
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.FilterChip
@@ -13,6 +14,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
@@ -31,11 +33,16 @@ fun SensorsPage(navController: NavController) {
     val mapVM by remember { mutableStateOf(MapViewModel()) }
     var filter by remember { mutableStateOf(SensorsFilter.All) }
 
+    val scrConfig = LocalConfiguration.current
+    val scrHalfHeight = scrConfig.screenHeightDp / 2
+
     GenericNavScaffold(
         title = { Text(text = stringResource(R.string.sensors_page_title)) }
     ) {
         Column(modifier = Modifier.padding(it)) {
-            MapUI(state = mapVM.state)
+
+            MapUI(state = mapVM.state, modifier = Modifier.height(scrHalfHeight.dp))
+
             Row(
                 modifier = Modifier.padding(horizontal = 8.dp),
                 horizontalArrangement = Arrangement.spacedBy(8.dp),

app/src/main/java/ru/nm17/narodmon/ui/viewmodel/MapViewModel.kt

@@ -3,20 +3,32 @@ package ru.nm17.narodmon.ui.viewmodel
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.lifecycle.ViewModel
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.request.get
+import io.ktor.client.statement.bodyAsChannel
+import io.ktor.utils.io.jvm.javaio.toInputStream
 import ovh.plrapps.mapcompose.api.addLayer
 import ovh.plrapps.mapcompose.core.TileStreamProvider
 import ovh.plrapps.mapcompose.ui.state.MapState
+import java.io.InputStream
 import java.net.URL
 
 class MapViewModel : ViewModel() {
+    private val client = HttpClient(CIO)
+
     private val tileStreamProvider = TileStreamProvider { row, col, zoom ->
-        URL("https://tile.openstreetmap.org/${zoom}/${row}/${col}.png").openStream()
+        requestTile(row, col, zoom)
-        //URL("https://tile2.maps.2gis.com/poi?x=${row}&y=${col}&z=${zoom}&v=1&ts=online_sd").openStream()
     }
 
     val state: MapState by mutableStateOf(
-        MapState(4, 4, 4096).apply {
+        MapState(4, 4096, 4096).apply {
             addLayer(tileStreamProvider)
         }
     )
+
+    private suspend fun requestTile(row: Int, col: Int, zoom: Int): InputStream {
+        val response = client.get("https://tile.openstreetmap.org/${zoom}/${col}/${row}.png")
+        return response.bodyAsChannel().toInputStream()
+    }
 }