Read Incoming message for verify otp in android

Nowadays application usually use SMS for authentication purpose, like OTP( One Time Password ),  for example when register or transfer amount, the backend application send SMS to authorized mobile. Android read SMS automatically when receive the SMS. it will helpful save time to switching application to messanger, copy OTP then back to application.   

Architecture

IncomingSms.class - this is a broadcast receiver, this is called when the SMS is receivd. 

Otp.class - this class used to fill the message to Textview

MainActivity.java - This is used to give permission to read message

Step 1) IncomingSms.class

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;
import android.util.Log;

public class IncomingSms extends BroadcastReceiver 
{
  @Override
  public void onReceive(Context context, Intent intent) 
  {

  final Bundle bundle = intent.getExtras();
  try {
  if (bundle != null) {

   final Object[] pdusObj = (Object[]) bundle.get("pdus");
   for (int i = 0; i < pdusObj .length; i++) {
    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[])                                                                                                    pdusObj[i]);
    String phoneNumber = currentMessage.getDisplayOriginatingAddress();
    String senderNum = phoneNumber ;
    String message = currentMessage .getDisplayMessageBody();
    try { 
     if (senderNum .equals("TA-DOCOMO")) {
            Otp Sms = new Otp();
            Sms.recivedSms(message );
     }
  }
  catch(Exception e){}
  
  }
   }

  } catch (Exception e) 
  {
                
 }
 }

}

Step 2).Otp.class

public class Otp extends Activity 
   {

       static EditText OtpNumber;
       protected void onCreate(Bundle savedInstanceState) 
         {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.otp);
            OtpNumber= (EditText) findViewById(R.id.txtName);
        }
      public void recivedSms(String message) 
        {
       try 
         {
          OtpNumber.setText(message);
         } 
         catch (Exception e) 
          {         
          }
       }

       } 

Step 3).MainActivity.java Add the below permissions and receiver to your manifest file

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

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