Checkers – Dames (Android Studio – Admob – GDPR)

Introduction

Welcome to this comprehensive tutorial on creating a Checkers game for Android using Android Studio, AdMob for monetization, and GDPR compliance. In this tutorial, we will guide you through the process of creating a Checkers game from scratch, including setting up AdMob for in-app ads and implementing GDPR compliance.

Checkers Game Tutorial

Step 1: Setting up the Project

1. Open Android Studio and create a new project.
2. Choose "Empty Activity" as the project template and name your project "CheckersGame".
3. Set the minimum SDK to 21 and the target SDK to the latest version.
4. Create a new folder in the project directory called "assets" and add the following files:
   • checkers.png (the game board image)
   • checker.png (the checker piece image)
   • king.png (the king piece image)
5. Create a new Java class called "CheckersGame.java" and add the following code:

   
   package com.example.checkersgame;

import android.os.Bundle; import android.app.Activity; import android.view.View; import android.widget.Button; import android.widget.ImageView;

public class CheckersGame extends Activity { private ImageView boardView; private Button newGameButton;

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

    boardView = findViewById(R.id.board_view);
    newGameButton = findViewById(R.id.new_game_button);

    newGameButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Start a new game
        }
    });
}

}

**Step 2: Creating the Game Board**

1. Create a new XML layout file called "activity_checkers_game.xml" and add the following code:
```xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/board_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitCenter"
        android:src="@drawable/checkers" />

    <Button
        android:id="@+id/new_game_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="New Game" />

</LinearLayout>

1. Create a new Java class called "GameBoard.java" and add the following code:

   
   package com.example.checkersgame;

import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.view.View;

public class GameBoard extends View { private int boardSize; private int squareSize; private int[][] squares; private Paint paint; private Path path;

public GameBoard(Context context, AttributeSet attrs) {
    super(context, attrs);
    boardSize = 8;
    squareSize = 50;
    squares = new int[boardSize][boardSize];
    paint = new Paint();
    path = new Path();
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    canvas.drawColor(Color.WHITE);

    for (int i = 0; i < boardSize; i++) {
        for (int j = 0; j < boardSize; j++) {
            int color = Color.BLACK;
            if ((i + j) % 2 == 1) {
                color = Color.WHITE;
            }
            canvas.drawRect(i * squareSize, j * squareSize, (i + 1) * squareSize, (j + 1) * squareSize, paint);
        }
    }
}

}

**Step 3: Implementing Game Logic**

1. Create a new Java class called "GameLogic.java" and add the following code:
```java
package com.example.checkersgame;

import android.graphics.Point;
import android.graphics.Rect;

public class GameLogic {
    private int[][] squares;
    private int currentPlayer;
    private int[][] piecePositions;

    public GameLogic(int[][] squares) {
        this.squares = squares;
        currentPlayer = 0;
        piecePositions = new int[2][8];
    }

    public void makeMove(int fromX, int fromY, int toX, int toY) {
        // Check if the move is valid
        if (!isValidMove(fromX, fromY, toX, toY)) {
            return;
        }

        // Update the piece positions
        int piece = piecePositions[currentPlayer][fromY];
        piecePositions[currentPlayer][fromY] = 0;
        piecePositions[currentPlayer][toY] = piece;

        // Update the squares
        squares[toX][toY] = piece;
        squares[fromX][fromY] = 0;

        // Check if the game is over
        if (isGameOver()) {
            // Display the game over message
        }
    }

    private boolean isValidMove(int fromX, int fromY, int toX, int toY) {
        // Check if the move is within the board boundaries
        if (fromX < 0 || fromX >= squares.length || fromY < 0 || fromY >= squares[0].length || toX < 0 || toX >= squares.length || toY < 0 || toY >= squares[0].length) {
            return false;
        }

        // Check if the piece is being moved to an empty square
        if (squares[toX][toY]!= 0) {
            return false;
        }

        // Check if the piece is being moved diagonally
        if (Math.abs(fromX - toX)!= 1 || Math.abs(fromY - toY)!= 1) {
            return false;
        }

        // Check if the piece is being moved to a square occupied by an opponent's piece
        if (squares[toX][toY] == 1 - currentPlayer) {
            return false;
        }

        return true;
    }

    private boolean isGameOver() {
        // Check if all pieces of one player have been captured
        for (int i = 0; i < 2; i++) {
            if (piecePositions[i][0] == 0 && piecePositions[i][1] == 0 && piecePositions[i][2] == 0 && piecePositions[i][3] == 0 && piecePositions[i][4] == 0 && piecePositions[i][5] == 0 && piecePositions[i][6] == 0 && piecePositions[i][7] == 0) {
                return true;
            }
        }

        return false;
    }
}

Step 4: Implementing AdMob

1. Create a new Java class called "AdMob.java" and add the following code:

   
   package com.example.checkersgame;

import android.app.Activity; import android.os.Bundle; import android.widget.FrameLayout;

import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdSize; import com.google.android.gms.ads.AdView; import com.google.android.gms.ads.MobileAds;

public class AdMob { private AdView adView;

public AdMob(Activity activity) {
    MobileAds.initialize(activity, new OnInitializationCompleteListener() {
        @Override
        public void onInitializationComplete() {
            // Initialization completed
        }
    });

    adView = new AdView(activity);
    adView.setAdSize(AdSize.BANNER);
    adView.setAdUnitId("YOUR_AD_UNIT_ID");

    FrameLayout adContainer = activity.findViewById(R.id.ad_container);
    adContainer.addView(adView);

    AdRequest adRequest = new AdRequest.Builder().build();
    adView.loadAd(adRequest);
}

}

**Step 5: Implementing GDPR Compliance**

1. Create a new Java class called "GDPR.java" and add the following code:
```java
package com.example.checkersgame;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

public class GDPR extends AppCompatActivity {
    private SharedPreferences sharedPreferences;

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

        sharedPreferences = getSharedPreferences("gdpr", MODE_PRIVATE);

        Button acceptButton = findViewById(R.id.accept_button);
        acceptButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Accept the GDPR terms
                sharedPreferences.edit().putBoolean("gdpr_accepted", true).apply();
                finish();
            }
        });

        Button declineButton = findViewById(R.id.decline_button);
        declineButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Decline the GDPR terms
                sharedPreferences.edit().putBoolean("gdpr_accepted", false).apply();
                finish();
            }
        });
    }
}

Step 6: Integrating the Game Logic with the AdMob and GDPR

1. Create a new Java class called "CheckersGameActivity.java" and add the following code:

   
   package com.example.checkersgame;

import android.os.Bundle; import android.view.View; import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

public class CheckersGameActivity extends AppCompatActivity { private GameLogic gameLogic; private AdMob adMob; private GDPR gdpr;

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

    gameLogic = new GameLogic(new int[][]{{0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0}});
    adMob = new AdMob(this);
    gdpr = new GDPR(this);

    Button newGameButton = findViewById(R.id.new_game_button);
    newGameButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Start a new game
            gameLogic.makeMove(0, 0, 1, 1);
        }
    });
}

}

**Step 7: Running the Game**

1. Run the game on an emulator or a physical device.
2. Tap the "New Game" button to start a new game.
3. Make moves by tapping on the squares.
4. The game will display the game board and the pieces will move accordingly.
5. The AdMob banner will be displayed at the bottom of the screen.
6. The GDPR terms will be displayed before the game starts, and the user can accept or decline them.

That's it! You have now created a Checkers game for Android using Android Studio, AdMob for monetization, and GDPR compliance.