Bug with typing in the EditText field. When i type my first letter the text field retracts under the keyboard.

package com.victorcuc.signalsfrommars;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText nameField;
    private Button startButton;

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

        nameField = findViewById(R.id.nameEditText);
        startButton = findViewById(R.id.startButton);

        startButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String name = nameField.getText().toString();
                Toast.makeText(MainActivity.this, name, Toast.LENGTH_LONG).show();
            }
        });
    }
}