Address to Lat/Long

MainActivity.java

package com.example.locationfromaddress;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.util.Pair;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import java.io.IOException;
import java.util.List;

public class MainActivity extends AppCompatActivity {

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

    public String convertPostcodeToAddress(String postcode, Context context) throws IOException {
        Geocoder coder = new Geocoder(context);
        List<Address> address;
        String fin;
        try {
            address = coder.getFromLocationName(postcode, 5);
            if (address == null) {
                return null;
            }
            Address location = address.get(0);
            String x = Double.toString(location.getLatitude());
            String y = Double.toString(location.getLongitude());
            fin = x + " " + y;

        } catch (Exception ex) {
            ex.printStackTrace();
            fin = "no address found";
        }
        return fin;
    }
    public void sendMessage(View view) throws IOException {
        EditText editText = (EditText)findViewById(R.id.editTextTextPersonName2);
        String editTextStr = editText.getText().toString();
        TextView tv1 = (TextView)findViewById(R.id.textView);
        String addr = convertPostcodeToAddress(editTextStr, getBaseContext());
        tv1.setText(addr);

    }
}

editTextTextPersonName2 and textView are both defined in the xml
A button is wired to sendMessage.