README.md

OTP_sms-Reader-Android

reads User's incoming OTP Reading for Android, Reading incoming SMS messages for verification

You need to use Broadcast Receiver to perform it.

you can download Source Code Here

Add this code to your Manifest.XML

Create MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    otpOnlyTextView = (TextView) findViewById(R.id.opt_textView_ID);
    fullmessageTextView = (TextView) findViewById(R.id.fullmessage_textView_ID);
    Button sendMsg=(Button)findViewById(R.id.sendMsg_ID);
    sendMsg.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            //sendMessageAPILINK(); USE ANY API TO SEND MESSAGE OR SEND ANY NORMAL MESSAGE THROUGH YOUR ANOTHER NUMBER
            checkAndRequestPermissions();
        }
    });
}

private BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equalsIgnoreCase("otp")) {
            final String message = intent.getStringExtra("message");
            final String sender = intent.getStringExtra("Sender");
            otpOnlyTextView.setText(message.replaceAll("\\D+", ""));
            fullmessageTextView.setText(sender + " : " + message);
            Toast.makeText(getBaseContext(), message, Toast.LENGTH_LONG).show();
            Log.e("OTP MESSSGE", message);
        }
    }
};

private boolean checkAndRequestPermissions() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(android.Manifest.permission.READ_SMS) != PackageManager.PERMISSION_GRANTED) {
        int receiveSMS = ContextCompat.checkSelfPermission(this, android.Manifest.permission.RECEIVE_SMS);
        int readSMS = ContextCompat.checkSelfPermission(this, android.Manifest.permission.READ_SMS);
        List<String> listPermissionsNeeded = new ArrayList<>();
        if (receiveSMS != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.RECEIVE_SMS);
        }
        if (readSMS != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(android.Manifest.permission.READ_SMS);
        }
        if (!listPermissionsNeeded.isEmpty()) {
            ActivityCompat.requestPermissions(this,
                    listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), 1);
            return false;
        }
        return true;
    }
    return true;

}

@Override
public void onResume() {
    LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter("otp"));
    super.onResume();
}

@Override
public void onPause() {
    super.onPause();
    LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver);
}

create receivers.OTPBroadCastReceiver.java

@Override
public void onReceive(Context context, Intent intent)
{
    // Get Bundle object contained in the SMS intent passed in
    Bundle bundle = intent.getExtras();
    SmsMessage[] smsMsg = null;
    String smsStr ="";
    if (bundle != null)
    {
        // Get the SMS message
        Object[] pdus = (Object[]) bundle.get("pdus");
        smsMsg = new SmsMessage[pdus.length];
        for (int i=0; i<smsMsg.length; i++){
            smsMsg[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
            smsStr = smsMsg[i].getMessageBody().toString();

            String Sender = smsMsg[i].getOriginatingAddress();
            //Check here sender is yours
            Intent smsIntent = new Intent("otp");
            smsIntent.putExtra("message",smsStr);
            smsIntent.putExtra("Sender",Sender);
            LocalBroadcastManager.getInstance(context).sendBroadcast(smsIntent);
        }
    }
}