问EditText:用户完成输入后如何更改可见性？

EN

    package com.example.android.monopolycredit;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

public class LoginLobby extends AppCompatActivity {

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

        final EditText usernameEditText = findViewById(R.id.usernameField);
        usernameEditText.setOnEditorActionListener(
                new EditText.OnEditorActionListener() {
                    @Override
                    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                        if (actionId == EditorInfo.IME_ACTION_SEARCH ||
                                actionId == EditorInfo.IME_ACTION_DONE ||
                                event.getAction() == KeyEvent.ACTION_DOWN &&
                                        event.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
                            if (!event.isShiftPressed()) {
                                // the user is done typing.
                                usernameEditText.setVisibility(View.GONE);
                                return true; // consume.
                            }
                        }
                        return false; // pass on to other listeners.
                    }
                });
    }

}