[GTN} Main Activity

package local.example.guessthenumber;

import android.content.Intent;
import android.database.DataSetObserver;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.AppCompatButton;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

import org.w3c.dom.Text;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity
        implements View.OnClickListener {

    static class ViewHolder {
        TextView gameAttempts;
        TextView gameMessage;
    }

    class Message {
        public final String message;
        public final int attempts;

        public Message(String message, int attempts) {
            this.message = message;
            this.attempts = attempts;
        }
    }

    private final String TAG = "MAIN_ACTIVITY";
    Game game;

    Button btnAttempt;
    EditText etAttempt;
    TextView tvUserName;
    ListView lvResult;
    ArrayList<Message> messages;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lvResult = (ListView) findViewById(R.id.lv_result);
        messages = new ArrayList<>();
//        ListAdapter adapt = new ArrayAdapter<String>(
//                this,
//                android.R.layout.simple_list_item_1,
//                messages);
        ListAdapter adapt =
                new ArrayAdapter<Message>(this, 0, messages) {


                    @NonNull
                    @Override
                    public View getView(
                            int position,
                            @Nullable View convertView,
                            @NonNull ViewGroup parent) {
                        if (convertView == null) {
                            convertView = getLayoutInflater()
                                    .inflate(R.layout.custom_message, null, false);
                            TextView tvAttempt = (TextView) convertView.findViewById(R.id.tv_cm_attempt);
                            TextView tvMessage = (TextView) convertView.findViewById(R.id.tv_cm_message);
                            ViewHolder holder = new ViewHolder();
                            holder.gameAttempts = tvAttempt;
                            holder.gameMessage = tvMessage;
                            convertView.setTag(holder);
                        }
                        ViewHolder holder = (ViewHolder)convertView.getTag();
                        TextView tvAttempt = holder.gameAttempts;
                        TextView tvMessage = holder.gameMessage;
                        Message message = messages.get(position);
                        tvAttempt.setText("" + message.attempts);
                        tvMessage.setText(message.message);

                        return convertView;
                    }
                };
        lvResult.setAdapter(adapt);
        tvUserName = (TextView) findViewById(R.id.tv_user_name);

        Intent parent = getIntent();
        UserInfo user = (UserInfo) parent.getParcelableExtra("user");
        tvUserName.setText(user.userName);

        btnAttempt = (Button) findViewById(R.id.btn_attempt);
        btnAttempt.setOnClickListener(this);
//        btnAttempt.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View view) {
//                Log.d(TAG, "onClickListener anonimo");
//            }
//        });
        etAttempt = (EditText) findViewById(R.id.et_attempt);
        etAttempt.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                btnAttempt.setEnabled(charSequence.length() > 0);
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

        game = new Game();
    }

    protected void attempt(View view) {
        Log.d(TAG, view.toString());
    }

    @Override
    public void onClick(View view) {
        Log.d(TAG, "onClickListener");
        CharSequence s = etAttempt.getText();
        int attempt = Integer.parseInt(s.toString());
        int result = game.makeAttempt(attempt);

        switch (result) {
            case Game.WIN:
                addMessage("Hai vinto", false);
                endGame();
                break;
            case Game.LESS:
                addMessage(String.format("Il numero %d è troppo piccolo", attempt));
                break;
            case Game.GREATER:
                addMessage(String.format("Il numero %d è troppo grande", attempt));
                break;
            case Game.GAME_OVER:
                addMessage(String.format("Hai perso. Il numero da indovinare era %d", game.getTarget()), false);
                endGame();
                break;
        }
        etAttempt.selectAll();
        etAttempt.requestFocus();
    }

    private void endGame() {
        btnAttempt.setEnabled(false);
        etAttempt.setEnabled(false);
    }

    private void addMessage(String message) {
        addMessage(message, true);
    }

    private void addMessage(String message, boolean count) {
//        if (count)
//            message = String.format("%d) - %s\n\n", game.getAttempts() - 1, message);
        messages.add(0, new Message(message, game.getAttempts() - 1));
        lvResult.invalidateViews();
    }
}