SMS(MainActivity.java).java

package com.example.gateotp;

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MainActivity2 extends AppCompatActivity  {
    private TextView textView;
    TextView textView3;
    String msgName = "";
    String smsmessage="";
    String date="";
    String Name="xyz";                                                   // Type any text which you want to search for in SMS(Messages) app..
    Pattern pattern = Pattern.compile("(\\d{4})");                       // will show if NAME string couldn't be found..
    String val = "No "+Name+" found ";
    String t;
    String username2="";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        textView = findViewById(R.id.textView);
    }
    @RequiresApi(api = Build.VERSION_CODES.N)
    public void ReadSms(View view) {
        Intent intent=getIntent();
        String username=intent.getStringExtra(MainActivity.EXTRA_NAME);
        username2+=username;

        Cursor cursor = getContentResolver().query(Uri.parse("content://sms"), null, null, null, null);
        int x = cursor.getCount();
        cursor.moveToFirst();
        for (int i = 1; i <= x; i++) {                                    //Reading Sms from Our phone...
            msgName = cursor.getString(2);
            smsmessage = cursor.getString(12);

            if (msgName.equals(Name)) {
                Matcher matcher = pattern.matcher(smsmessage);               //This line will seacrh for 4 digit number in the whole message which you have typed NAME(String) above ..

                if (matcher.find()) {
                    val = matcher.group(0);



                }
                else {
                    val = "Not Found !";
                }
                textView.setText(val);

            } else {
                cursor.moveToNext();
            }
            textView.setText(val);
        }

        if (!val.equals("Not Found !") && !val.equals("No "+Name+" found ")){
            gotoUrl("https://api.telegram.org/bot[ Type bot id ]/sendMessage?chat_id=[ Type chat id ]?????&text=Todays OTP of "+" "+ val);

        }         /*
                    Above if condition is for Telegram API entre your bot id and chat id of your choice...
                    above condition will only work if message will be founded in your phone ..
                    
                  */



    }




    private void gotoUrl(String s) {
        Uri uri=Uri.parse(s);
        startActivity(new Intent(Intent.ACTION_VIEW,uri));
    }
}