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Utility for binding a local android service in compose
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package com.example.app | |
import android.app.Service | |
import android.content.Intent | |
import android.os.Binder | |
import android.os.IBinder | |
import androidx.compose.material.Text | |
import androidx.compose.runtime.Composable | |
import kotlin.random.Random | |
class RandomNumberService : Service() { | |
private val binder = LocalBinder() | |
private val randomNumberGenerator = Random(seed = 100) | |
val randomNumber: Int | |
get() = randomNumberGenerator.nextInt() | |
inner class LocalBinder : Binder() { | |
val service: RandomNumberService | |
get() = this@RandomNumberService | |
} | |
override fun onBind(intent: Intent): IBinder = binder | |
} | |
@Composable | |
fun RandomNumberServiceExample() { | |
val randomNumberService = rememberBoundLocalService<RandomNumberService, RandomNumberService.LocalBinder> { service } | |
Text( | |
text = randomNumberService?.randomNumber?.toString().orEmpty(), | |
) | |
} |
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package com.example.app | |
import android.app.Service | |
import android.content.ComponentName | |
import android.content.Context | |
import android.content.Intent | |
import android.content.ServiceConnection | |
import android.os.Binder | |
import android.os.IBinder | |
import androidx.compose.runtime.Composable | |
import androidx.compose.runtime.DisallowComposableCalls | |
import androidx.compose.runtime.DisposableEffect | |
import androidx.compose.runtime.getValue | |
import androidx.compose.runtime.mutableStateOf | |
import androidx.compose.runtime.remember | |
import androidx.compose.runtime.setValue | |
import androidx.compose.ui.platform.LocalContext | |
@Composable | |
inline fun <reified BoundService : Service, reified BoundServiceBinder : Binder> rememberBoundLocalService( | |
crossinline getService: @DisallowComposableCalls BoundServiceBinder.() -> BoundService, | |
): BoundService? { | |
val context: Context = LocalContext.current | |
var boundService: BoundService? by remember(context) { mutableStateOf(null) } | |
val serviceConnection: ServiceConnection = remember(context) { | |
object : ServiceConnection { | |
override fun onServiceConnected(className: ComponentName, service: IBinder) { | |
boundService = (service as BoundServiceBinder).getService() | |
} | |
override fun onServiceDisconnected(arg0: ComponentName) { | |
boundService = null | |
} | |
} | |
} | |
DisposableEffect(context, serviceConnection) { | |
context.bindService(Intent(context, BoundService::class.java), serviceConnection, Context.BIND_AUTO_CREATE) | |
onDispose { context.unbindService(serviceConnection) } | |
} | |
return boundService | |
} |
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