What code do I use to create a Validate class on Androidstudio?

Question

I want to create a class to check the 2 fields EditText are filled, called Validacao. I wanted to call like:

if (Validacao(TextoA, TextoB) == true) {
    executa código;

I don’t know what the class code looks like Validacao. You have to have a builder Validacao()? What the code would look like?

import android.widget.EditText;
import android.widget.Toast;

public class Validacao {
    private boolean x = true;
    private boolean y = true;
    private boolean z = true;
    private boolean a = false;

    public Validacao(EditText textA, EditText textB) {
        // Valida para ter todos os 2 campos preenchidos
        if ((textA.getText().toString().isEmpty()) && (textB.getText().toString().isEmpty())) {
            z = false;
            Toast toast = Toast.makeText(this, "Informe os números." , Toast.LENGTH_SHORT);
            toast.show();
        } else if (textA.getText().toString().isEmpty()) {
            x = false;
            Toast toast = Toast.makeText(this, "Informe o primeiro número." , Toast.LENGTH_SHORT);
            toast.show();
        } else if (textB.getText().toString().isEmpty()) {
            y = false;
            Toast toast = Toast.makeText(this, "Informe o segundo número." , Toast.LENGTH_SHORT);
            toast.show();
        }
    }
    if (x && y && z)
        a = true;
    return a;
}

Answer 1

When a function with the same class name is defined, that function shall be the constructor of that class, and shall be invoked through the operator new

As you are creating a validation class, I suggest you use static functions and the logic of checking how many valid variables are made where these methods are called

For example:

public class Validacao {
    public Validacao() {  }

    public static boolean isValid(EditText et, String msg, Context context) {
        if (et.getText().toString().isEmpty()) {
            Toast toast = Toast.makeText(context, msg, Toast.LENGTH_SHORT);
            toast.show();

            return false;
        } else {
            return true;
        }
    }
}

To use:

if (Validacao.isValid(x, "Informe o primeiro número", getApplicationContext()) && Validacao.isValid(y, , "Informe o segundo número", getApplicationContext()) && Validacao.isValid(z, "Informe o terceiro número", getApplicationContext())) {
    // Faz alguma coisa
}

You can also create a custom function for each variable