Kotlin Copilot: Jetpack compose get device ID

Kotlin Copilot: Jetpack Compose Get Device ID

In this example, you'll learn how to retrieve the unique device ID within a Jetpack Compose app using Kotlin. Accessing the device ID can be useful for analytics, user identification, or device-specific features, while respecting Android's permission model.

Code

import android.content.Context
import android.provider.Settings
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.platform.LocalContext

@Composable
fun DeviceIdDisplay() {
  val context = LocalContext.current
  // Remember the device ID to avoid recomputing on recomposition
  val deviceId = remember {
    getDeviceId(context)
  }
  Text(text = "Device ID: $deviceId")
}

// Function to get the ANDROID_ID, a unique device identifier
fun getDeviceId(context: Context): String {
  return Settings.Secure.getString(
    context.contentResolver,
    Settings.Secure.ANDROID_ID
  ) ?: "Unknown"
}

Key Points

• Use Settings.Secure.ANDROID_ID to retrieve a unique device identifier without special permissions.
• Access the Context inside a composable via LocalContext.current.
• Use remember to cache the device ID and prevent unnecessary recomputations during recomposition.
• The ANDROID_ID is stable for the device but can reset after a factory reset or on some devices.
• Always consider user privacy and avoid using device IDs for tracking without consent.