How to replace letters with accents for the same ones without accents? "á" for "a"

I am trying to get it to accept the accent marks but no one has managed to solve this problem for me, it does not directly read the letters with accent marks, therefore the only solution that I think is simpler is that if you enter an accent mark, it will change it for the same one without an accent mark, it is say, "á" for "a", "é" for "e" ... and so on.

I'm going to help you too because I found this code that does what I'm telling you, but I don't know how to put it in my code.

Character change example:

public static String remove1(String input) {
  // Cadena de caracteres original a sustituir.
  String original = "áàäéèëíìïóòöúùuñÁÀÄÉÈËÍÌÏÓÒÖÚÙÜÑçÇ";
  // Cadena de caracteres ASCII que reemplazarán los originales.
  String ascii = "aaaeeeiiiooouuunAAAEEEIIIOOOUUUNcC";
  String output = input;
  for (int i=0; i<original.length(); i++) {
      // Reemplazamos los caracteres especiales.
      output = output.replace(original.charAt(i), ascii.charAt(i));
  }//for i
  return output;
}

That is what I have found on the Internet, one of many, but my code is this (and it does work):

public class Admin extends AppCompatActivity {
EditText titulo_in;
EditText descripcion_in;
Button btnActualizarA;


String recuperado="";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.admin);

    titulo_in = (EditText)findViewById(R.id.titulo_in);
    descripcion_in = (EditText)findViewById(R.id.descripcion_in);

   // titu = titulo_in.getText().toString();
    //desc = descripcion_in.getText().toString();



    final Bundle recupera=getIntent().getExtras();
    if(recupera!=null){
        recuperado=recupera.getString("cod");
    }

    btnActualizarA=(Button)findViewById(R.id.publicar);
    btnActualizarA.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Thread tr2=new Thread(){
                @Override
                public void run() {
                    ActualizarPost(recuperado, titulo_in.getText().toString(), descripcion_in.getText().toString());

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(getApplicationContext(),"Se ha completado la publicación", Toast.LENGTH_SHORT).show();
                        }
                    });
                }
            };
            tr2.start();
        }
    });


}

public void ActualizarPost(String c, String tit, String des){
   // HttpURLConnection conection=null;
    try{
        String titleUtf8 = URLEncoder.encode(tit, "UTF-8").replaceAll("\\+","%20");
        String descriptionUtf8 = URLEncoder.encode(des, "UTF-8").replaceAll("\\+","%20");

        String urlParameters="cod="+c+"&tit="+titleUtf8+"&des="+descriptionUtf8;


        URL url=new URL("http://rudeboys.esy.es/ramiroconnect/publicar.php");
        HttpURLConnection conection = (HttpURLConnection) url.openConnection();
       // conection.setRequestProperty("Content-Type","UTF-8");

        //estableciendo el metodo
        conection.setRequestMethod("POST");

        //longitud de datos que se envian
        conection.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.getBytes().length));
       // conection.setRequestProperty("Content-Type", "application/json; charset=utf-8");


        //comando para la salida de datos
        conection.setDoOutput(true);

        DataOutputStream wr = new DataOutputStream(conection.getOutputStream());
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(wr, "UTF-8"));
        writer.write(urlParameters);
        writer.close();

        InputStream is =conection.getInputStream();
    }catch (Exception ex){}
}

}

How can I change the code so that it updates the data in the DB without accents?