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fix(android): switch Ktor CIO engine to OkHttp for stable background WebSocket

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CIO uses Java NIO selectors which Android's power management freezes
when the app is backgrounded, dropping the WebSocket connection. OkHttp
is Android-native and maintains connections through the OS network stack.
This commit is contained in:
Somasundaram Mahesh
2026-02-18 18:49:14 +05:30
parent 0b36d92fef
commit 45766621f2
3 changed files with 4 additions and 12 deletions
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2
android/app/build.gradle.kts
View File

@@ -48,7 +48,7 @@ dependencies {
implementation(libs.androidx.compose.material3)
// Ktor WebSocket
implementation(libs.ktor.client.cio)
implementation(libs.ktor.client.okhttp)
implementation(libs.ktor.client.websockets)
implementation(libs.ktor.client.content.negotiation)
implementation(libs.ktor.serialization.kotlinx.json)

12
android/app/src/main/java/com/thisux/droidclaw/connection/ReliableWebSocket.kt
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@@ -6,8 +6,7 @@ import com.thisux.droidclaw.model.ConnectionState
import com.thisux.droidclaw.model.DeviceInfoMsg
import com.thisux.droidclaw.model.ServerMessage
import io.ktor.client.HttpClient
import io.ktor.client.engine.cio.CIO
import io.ktor.client.engine.cio.endpoint
import io.ktor.client.engine.okhttp.OkHttp
import io.ktor.client.plugins.websocket.WebSockets
import io.ktor.client.plugins.websocket.webSocket
import io.ktor.websocket.Frame
@@ -78,14 +77,7 @@ class ReliableWebSocket(
}
private suspend fun connectOnce(serverUrl: String, apiKey: String, deviceInfo: DeviceInfoMsg) {
val httpClient = HttpClient(CIO) {
engine {
requestTimeout = 30_000
endpoint {
connectTimeout = 10_000
keepAliveTime = 30_000
}
}
val httpClient = HttpClient(OkHttp) {
install(WebSockets) {
pingIntervalMillis = 30_000
}

2
android/gradle/libs.versions.toml
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@@ -31,7 +31,7 @@ androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "u
androidx-compose-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
androidx-compose-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
ktor-client-cio = { group = "io.ktor", name = "ktor-client-cio", version.ref = "ktor" }
ktor-client-okhttp = { group = "io.ktor", name = "ktor-client-okhttp", version.ref = "ktor" }
ktor-client-websockets = { group = "io.ktor", name = "ktor-client-websockets", version.ref = "ktor" }
ktor-client-content-negotiation = { group = "io.ktor", name = "ktor-client-content-negotiation", version.ref = "ktor" }
ktor-serialization-kotlinx-json = { group = "io.ktor", name = "ktor-serialization-kotlinx-json", version.ref = "ktor" }