Styjun

I am working on an android application that shows bar specials in the area and I want to make sure the only users that are using our app are 21+ years old. I have created a login/registration activity using edit texts and the information typed into the edit texts is sent to a mySQL database.

I have already searched for tutorials on youtube/stack overflow/google for help on this and I have only found datepicker tutorials. I am not sure how I would implement a datepicker tutorial into my project using edit texts.

Here is part of my RegisterActivity.java file that I want to validate the data when the user clicks on register. I have already figured out how to validate email/password but do not know how to add date difference into my code. I have also added my submitForm function that is called....

I am not sure what the output is supposed to look like or how to implement age validation into my project as a I am still fairly new to using Android Studio and I am open to new ideas etc. on how to best implement this into my project.

Here is part of my RegisterActivity.java file that I want to validate the data when the user clicks on register. I have already figured out how to validate email/password but do not know how to add date difference into my code. I have also added my submitForm function that is called....

buttonSignup.setOnClickListener(new View.OnClickListener() 
@Override
 public void onClick(View view) 

 String email = signupInputEmail.getText().toString();
 String password = signupInputPassword.getText().toString();
 if (password.length()< 8)
 signupInputPassword.setError("Your password must be at least 8 characters");
 else if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()) 
 signupInputEmail.setError("You must enter a valid email address");
 else 

 submitForm();
 

 
 );

submitForm()

private void submitForm() 

 int selectedId = genderRadioGroup.getCheckedRadioButtonId();
 String gender;
 if(selectedId == R.id.female_radio_btn)
 gender = "Female";
 else
 gender = "Male";

 registerUser(signupInputName.getText().toString(),
 signupInputEmail.getText().toString(),
 signupInputPassword.getText().toString(),
 gender,
 signup_input_DOB.getText().toString());
 

Convert the date of birth on the sign up input from String to Date like this:

String DOB = signup_input_DOB.getText().toString(); 

Date dateOfBirth=new SimpleDateFormat("dd/MM/yyyy").parse(DOB); 

Then pass the date of birth to a method computing for the age:

int age = currentDate.getYear() - dateOfBirth.getYear();

Looks like you are following a long way to do this task. You can simply use DatePicker (Android Date Picker Official Docs

and set the selection range for the date, set the selected date (by the user) on the TextView. User Interface for handling the click event.

Create Interface.

public interface IOnItemClickListenerCountryStates 
 void onAgeClick(String Date);