如何在kotlin中从收到的短信中获得完整的正文文本？

<uses-permission android:name="android.permission.RECEIVE_SMS" />

<application>
    ...
    <receiver android:name=".SmsReceiver">
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>
</application>

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.provider.Telephony
import android.telephony.SmsMessage

class SmsReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent) {
        if (Telephony.Sms.Intents.SMS_RECEIVED_ACTION == intent.action) {
            val bundle = intent.extras
            if (bundle != null) {
                val pdus = bundle.get("pdus") as Array<Any>?
                if (pdus != null) {
                    for (pdu in pdus) {
                        val smsMessage = SmsMessage.createFromPdu(pdu as ByteArray)
                        val messageBody = smsMessage.messageBody
                        // 在这里可以对短信内容进行处理
                        // messageBody即为完整的正文文本
                    }
                }
            }
        }
    }
}