XO, 16-23.10.2021, GameActivity.java

package com.example.myxogame;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;

public class GameActivity extends AppCompatActivity implements View.OnClickListener {
    int rows, cols, winCount;
    String player;
    TableLayout tblBoard;
    TextView tvPlayerTurn;
    int counter = 0;

    Button[][] btns;
    boolean gameOver = false;
    int clickedRow, clickedCol;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        Intent intent = getIntent();
        rows = intent.getIntExtra("ROWS_COUNT", -1);
        cols = intent.getIntExtra("COLS_COUNT", -1);
        winCount = intent.getIntExtra("WIN_COUNT", -1);

        if (rows == -1 || cols == -1 || winCount == -1) {
            // handle exception
            Toast.makeText(this, "Error! missing or error data.", Toast.LENGTH_LONG).show();
            finish();
        }
        setContentView(R.layout.activity_game);
        //Toast.makeText(this, rows + "," + cols + "," + winCount, Toast.LENGTH_LONG).show();
        btns = new Button[rows][cols];
        tblBoard = findViewById(R.id.tblBoard);
        tvPlayerTurn = findViewById(R.id.tvPlayerTurn);

        for (int r = 0; r < rows; r++) {
            TableRow newRow = new TableRow(this);
            TableLayout.LayoutParams rowParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, 0, 1);
            newRow.setLayoutParams(rowParams);
            for (int c = 0; c < cols; c++) {
                Button newButton = new Button(this);

                TableRow.LayoutParams buttonParams = new TableRow.LayoutParams(0, TableRow.LayoutParams.MATCH_PARENT, 1);
                newButton.setLayoutParams(buttonParams);

                newButton.setOnClickListener(this);

                newRow.addView(newButton);
                btns[r][c] = newButton;
            }

            tblBoard.addView(newRow);

        }

        player = "X";
        tvPlayerTurn.setText(player + " : playing");
    }

    @Override
    public void onClick(View v) {
        if (!gameOver) {
            Button btn = (Button) v;
            if (btn.getText().toString().length() == 0) {
                btn.setText(player);
                counter++;

                findClickedPosition(btn); // update cliked row and clicked col

                if (win()) {
                    // player has win the game
                    Toast.makeText(this, player + " is winner!", Toast.LENGTH_LONG).show();
                    gameOver = true;
                } else {
                    if (counter < rows * cols) {
                        if (player.equals("X")) {
                            player = "O";
                        } else {
                            player = "X";
                        }

                        tvPlayerTurn.setText(player + " : playing");
                    } else {
                        // board is full, stop the game
                        // TODO ask the player for new game
                        Toast.makeText(this, "Game is over!", Toast.LENGTH_SHORT).show();
                        gameOver = true;
                    }
                }
            }
        }
    }

    private void findClickedPosition(Button btn) {
        for (int r = 0; r < rows; r++) {
            for (int c = 0; c < cols; c++) {
                if (btns[r][c].getId() == btn.getId()) {
                    clickedRow = r;
                    clickedCol = c;
                    return;
                }
            }
        }
    }

    private boolean win() {
        return (winRow() || winCol() || winDiag());
    }

    private boolean winDiag() {
        // TODO for next lesson
        while (clickedCol > 0 && clickedRow > 0) {
            clickedRow--;
            clickedCol--;
        }
        return false;
    }

    private boolean winCol() {
        for (int c = 0; c < cols; c++) {
            int playCount = 0;
            for (int r = 0; r < rows; r++) {
                if (btns[r][c].getText().toString().equals(player)) {
                    playCount++;
                    if (playCount == winCount) {
                        return true;
                    }
                } else {
                    playCount = 0;
                }
            }
        }
        return false;
    }

    private boolean winRow() {
        for (int r = 0; r < rows; r++) {
            int playCount = 0;
            for (int c = 0; c < cols; c++) {
                if (btns[r][c].getText().toString().equals(player)) {
                    playCount++;
                    if (playCount == winCount) {
                        return true;
                    }
                } else {
                    playCount = 0;
                }
            }
        }
        return false;
    }
}