XO, ver 1.0 - java

package com.example.myxogame;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private ImageButton[][] btns;
    private int player = 1;

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

        btns = new ImageButton[3][3];
        for (int r = 0; r < 3; r++) {
            for (int c = 0; c < 3; c++) {
                // btns[0][0] = findViewById(R.id.ibtn00);
                String name = "ibtn" + r + c;
                int id = getResources().getIdentifier(name, "id", getPackageName());
                btns[r][c] = findViewById(id);
                btns[r][c].setImageResource(R.drawable.ic_launcher_background);
                btns[r][c].setTag(R.drawable.ic_launcher_background);
            }
        }
    }

    public void btnClicked(View view) {
        if (player == 1) {
            ((ImageButton) view).setImageResource(R.drawable.x);
            view.setTag(R.drawable.x);
            if (win()) {
                Toast.makeText(this, "player " + player + " win", Toast.LENGTH_SHORT).show();
            } else
                player = 2;
        } else {
            ((ImageButton) view).setImageResource(R.drawable.o);
            view.setTag(R.drawable.o);
            if (win()) {
                Toast.makeText(this, "player " + player + " win", Toast.LENGTH_SHORT).show();
            } else
                player = 1;
        }
    }

    public boolean win() {
        if (winRow()) //|| winCol() || diag1() || diag2())
            return true;
        else
            return false;
    }

    private boolean winRow() {
        for (int r = 0; r < 3; r++) {
            boolean same1, same2;
            same1 = (int) (btns[r][0].getTag()) == (int) (btns[r][1].getTag());
            same2 = (int) (btns[r][1].getTag()) == (int) (btns[r][2].getTag());
            if (same1==true && same2==true)
                return true;
        }

        return false;
    }


}