Cara Membuat SMS Gateway Sederhana -Android

Spesifikasi source code SMS Gateway Sederhana :
- Bisa menjawab dan menerima SMS secara otomatis ketika sms diterima
- Menggunakan fungsi if sederhana dalam menjawab pesan
- Tanpa database

Gambar 1. Hasil running source code 

Source code:

1. Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="oddsaydev.smsgatewaysederhana">
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.READ_SMS" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".ReceiveSms" >
            <intent-filter>
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

2. ReceiveSms.java

/**
 * Created by Windows on 06/03/2017.
 */
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.ToneGenerator;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;

public class ReceiveSms extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle myBundle = intent.getExtras();
        SmsMessage [] messages = null;
        String strMessage = "";
        String nohp="";
        String pesan="";
        if (myBundle != null)
        {
            Object [] pdus = (Object[]) myBundle.get("pdus");
            messages = new SmsMessage[pdus.length];

            for (int i = 0; i < messages.length; i++)
            {
                messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

                nohp =messages[i].getOriginatingAddress();
                        pesan=messages[i].getMessageBody();
            }

           // Toast.makeText(context, strMessage, Toast.LENGTH_SHORT).show();
            String balasan="";
if(pesan.equals("reg")){

    balasan="Selamat datang, pilih 1 untuk bahasa Inggris, pilih 2 untuk bahasa Indonesia";
}else if(pesan.equals("1")){
    balasan="Anda memilih 1 untuk bahasa Inggris";
}else if(pesan.equals("2")){
    balasan="Anda memilih 1 untuk bahasa Indonesia";
}

     SmsManager smsManager = SmsManager.getDefault();
         smsManager.sendTextMessage(nohp, null, balasan, null, null);
        }
        ToneGenerator toneG = new ToneGenerator(AudioManager.STREAM_ALARM, 100);
        toneG.startTone(ToneGenerator.TONE_CDMA_ALERT_CALL_GUARD, 200);
    }


    }

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