Enable NFC feature if device has it

NFC.kt

  fun turnOnNfc() {
      runBlocking {
          var count = 0
          NfcAdapter.getDefaultAdapter(get())?.run {
              enableNfc()
              while (!isEnabled) {
                  Log.i("TAG", "Waiting for NFC adapter to turn on")
                  delay(200)
                  count += 1
                  if(count > 10) {
                      Log.w("TAG", "No NFC adapter found after $count attempts")
                      return@runBlocking
                  }
              }
              Log.i("TAG", "NFC adapter turned on")
          } ?: run {
              Log.i("TAG", "No NFC adapter found, skipping turning NFC on")
          }
      }
  }
    
fun enableNfc() {
    nfcServiceCall(
            when {
                Build.VERSION.SDK_INT >= Build.VERSION_CODES.N -> 8
                else -> 7
            })
}

fun disableNfc() {
    nfcServiceCall(
            when {
                Build.VERSION.SDK_INT >= Build.VERSION_CODES.N -> 7
                else -> 6
            })
}

private fun nfcServiceCall(value: Int) {
    GlobalScope.launch {
        "service call nfc $value".runCommand()
    }
}

fun String.runCommand() = run {
    execCommands(this)
}

@Throws(IOException::class)
fun execCommands(vararg commands: String): Int {
    var result = 1
    val runTime = Runtime.getRuntime()
    val process = runTime.exec("su")
    val os = DataOutputStream(
        process.outputStream
    )
    try {
        for (element in commands) {
            os.writeBytes(
                """
                    $element
                    
                    """.trimIndent()
            )
            os.flush()
        }
        os.writeBytes("exit\n")
        os.flush()
        process.waitFor()
        result = process.exitValue()
    } catch (e: InterruptedException) {
        return result
    } finally {
        os.close()
    }
    return result
}