Automatic search of user address

Take a look at the Geocoder class and your method getFromLocation .

You have a complete example on the website for Android developers, but in summary, it is something like:

Geocoder geocoder = new Geocoder(this, Locale.getDefault());
List<Address> addresses = null;

try {
    addresses = geocoder.getFromLocation(latitude, longitude, 1);
} catch (IOException ioException) {
    Log.e(TAG, "Serviço indisponível", ioException);
} catch (IllegalArgumentException illegalArgumentException) {
    Log.e(TAG, "Localização inválida", illegalArgumentException);
}

if(addresses != null && addresses.size() > 0) {
    Address address = addresses.get(0);
    // Esse é o endereço.
}

For more details, and a complete functional example, I recommend reading from the guide

Well, I'll separate my answer into 2 parts:

• Perform the search when the user enters the zip code in the form field:

cep.setOnFocusChangeListener(OnFocusChangeListener { _, hasFocus -> if (!hasFocus) { if(Utils.validCep(cep.text.toString())){ //Request para o serviço de consulta do CEP } } })

where: the zip code is my EditText . I used the OnFocusChangeListener method in this case because the way I mounted my form was the most appropriate in my view. But you can control via IMEOptions or TextChangedListener , as you prefer.

I'll also leave the function that validates the zip code below.

fun validCep(cep: String): Boolean {
        val pattern = Pattern.compile("^[0-9]{5}-[0-9]{3}$")
        val matcher = pattern.matcher(cep)
        return matcher.find()
    }

• Search for zip code data

I like to use ViaCEP to do this.

Just send a request to the address viacep.com.br/ws/01001000/json/ , where 01001000 would be the zip code to query, and it returns you a JSON in this format:

 {
  "cep": "01001-000",
  "logradouro": "Praça da Sé",
  "complemento": "lado ímpar",
  "bairro": "Sé",
  "localidade": "São Paulo",
  "uf": "SP",
  "unidade": "",
  "ibge": "3550308",
  "gia": "1004"
}

Just take the return and set the address fields to your form in case of return 200 .

If you do not have a form to enter the ZIP code, the best way is to follow the answer using Geocoder, where you would get the location of the device for consultation.