Otp verification in android

OTP verification in android and Easy SMS Verification in Android using Textlocal SMS API

Textlocal is India’s No. 1 Bulk SMS Platform 

To use API of Textlocal you need to sign up and create an API key and receive 10 free SMS credit.

To create Key Check out: https://www.textlocal.in/

Follow Below code:

//Set This code into your Button Click Event to send OTP and verify this randomly generated number with the user 


                        try {
                            // Construct data
                            String apiKey = "apikey=" + "Your API KEY";
                            Random random=new Random();
                            randomNumber=random.nextInt(999999);
                            String message = "&message=" + "Verify your account with otp "+randomNumber;
                            String sender = "&sender=" + "Developer";
                            String numbers = "&numbers=" + "919876543210"; // Phone number with country code

                          
                            HttpURLConnection conn = (HttpURLConnection) new URL ("https://api.textlocal.in/send/?").openConnection();
                            String data = apiKey + numbers + message + sender;
                            conn.setDoOutput(true);
                            conn.setRequestMethod("POST");
                            conn.setRequestProperty("Content-Length", Integer.toString(data.length()));
                            conn.getOutputStream().write(data.getBytes("UTF-8"));
                            final BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                            final StringBuffer stringBuffer = new StringBuffer();
                            String line;
                            while ((line = rd.readLine()) != null) {
                                stringBuffer.append(line);
                            }
                            rd.close();

                            SharedPreferences preferences=getSharedPreferences("checkscreen",MODE_PRIVATE);
                            SharedPreferences.Editor editor=preferences.edit();
                            editor.putString("otpnumber", String.valueOf(randomNumber));
                            editor.apply();
                            Toast.makeText(getApplicationContext(),"OTP SEND "+randomNumber,Toast.LENGTH_LONG).show();
                        } catch (Exception e) {
                            System.out.println("Error SMS "+e);
                            Toast.makeText(getApplicationContext(),"Error to OTP SEND",Toast.LENGTH_LONG).show();
                        }