如何在Android中以离线和在线模式构建Tic Tac Toe游戏？

在本文中，我们将制作一个具有在线和离线模式的井字游戏。因此对于这个项目，我们将使用Kotlin和XML 。井字游戏是一款两人游戏。每个玩家都有X或O。两位玩家同时玩一局。一口气，玩家需要在3×3网格中选择一个位置并将其标记放置在该位置。游戏会持续运行直到有人获胜。在上一篇文章中，我们在Android中构建了一个简单的Tic Tac Toe Game，但在本文中，我们在应用程序内部具有以下附加功能：

• 单人玩家
• 多人
  • 在线游戏
    • 通过输入游戏代码创建和加入
  • 离线游戏

下面提供了一个示例视频，以使您对本文中的工作有个大概的了解。

基本术语

• XML：它的完整格式是一种可扩展的标记语言，并且是一组代码和标签。
• Kotlin：这是由JetBrains开发的一种免费的开源编程语言。
• Android Studio： Android Studio是用于Android应用程序开发的官方集成开发环境。
• Firebase：这是Google提供的后端服务。

分步实施

步骤1：创建一个新项目

要在Android Studio中创建新项目，请参阅如何在Android Studio中创建/启动新项目。请注意，选择Kotlin作为编程语言。

步骤2：使用activity_main.xml文件

导航到应用程序> res>布局> activity_main.xml，然后将以下代码添加到该文件中。以下是activity_main.xml文件的代码。

编写了这么多代码之后，UI看起来像这样：

步骤3：使用MainActivity.kt文件

转到MainActivity.kt文件，并参考以下代码。下面是MainActivity.kt文件的代码。在代码内部添加了注释，以更详细地了解代码。在这里，我们将向我们的应用程序添加功能。

科特林

class MainActivity : AppCompatActivity() {
  
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
          
        // reset button listener
        button10.setOnClickListener {
            reset()
  
        }
    }
      
    // player winning count 
    var player1Count = 0
    var player2Count = 0
    
      // this function handle the click event on the board.
    fun clickfun(view:View)
    {
        if(playerTurn) {
            val but = view as Button
            var cellID = 0
            when (but.id) {
                R.id.button -> cellID = 1
                R.id.button2 -> cellID = 2
                R.id.button3 -> cellID = 3
                R.id.button4 -> cellID = 4
                R.id.button5 -> cellID = 5
                R.id.button6 -> cellID = 6
                R.id.button7 -> cellID = 7
                R.id.button8 -> cellID = 8
                R.id.button9 -> cellID = 9
            }
            playerTurn = false;
            Handler().postDelayed(Runnable { playerTurn = true } , 600)
            playnow(but, cellID)
        }
    }
    var player1 = ArrayList()
    var player2 = ArrayList()
    var emptyCells = ArrayList()
    var activeUser = 1
    
      // this function update update the game board after every move.
    fun playnow(buttonSelected:Button , currCell:Int)
    {   val audio = MediaPlayer.create(this , R.raw.poutch)
        if(activeUser == 1)
        {
            buttonSelected.text = "X"
            buttonSelected.setTextColor(Color.parseColor("#EC0C0C"))
            player1.add(currCell)
            emptyCells.add(currCell)
            audio.start()
            buttonSelected.isEnabled = false
            Handler().postDelayed(Runnable { audio.release() } , 200)
            val checkWinner = checkwinner()
            if(checkWinner == 1){
                Handler().postDelayed(Runnable { reset() } , 2000)
            }
            else if(singleUser){
                Handler().postDelayed(Runnable { robot() } , 500)
            }
            else
                activeUser = 2
        }
        else
        {
            buttonSelected.text = "O"
            audio.start()
            buttonSelected.setTextColor(Color.parseColor("#D22BB804"))
            activeUser = 1
            player2.add(currCell)
            emptyCells.add(currCell)
            Handler().postDelayed(Runnable { audio.release() } , 200)
            buttonSelected.isEnabled = false
            val checkWinner  = checkwinner()
            if(checkWinner == 1)
                Handler().postDelayed(Runnable { reset() } , 4000)
        }
    }
      
    // this function resets the game.
    fun reset()
    {
        player1.clear()
        player2.clear()
        emptyCells.clear()
        activeUser = 1;
        for(i in 1..9)
        {
            var buttonselected : Button?
            buttonselected = when(i){
                1 -> button
                2 -> button2
                3 -> button3
                4 -> button4
                5 -> button5
                6 -> button6
                7 -> button7
                8 -> button8
                9 -> button9
                else -> {button}
            }
            buttonselected.isEnabled = true
            buttonselected.text = ""
            textView.text = "Player1 : $player1Count"
            textView2.text = "Player2 : $player2Count"
        }
    }
      
    // this function disable all the button on the board for a while.
       fun disableReset()
    {
        button10.isEnabled = false
        Handler().postDelayed(Runnable { button10.isEnabled = true } , 2200)
    }
}

编写了这么多代码之后，我们的应用就可以使用基本功能了。现在，让我们为单人游戏模式添加机器人功能：

科特林

// This function automatically make a move at a random postion.
fun robot()
    {
        val rnd = (1..9).random()
        if(emptyCells.contains(rnd))
            robot()
        else {
                val buttonselected : Button?
                buttonselected = when(rnd) {
                    1 -> button
                    2 -> button2
                    3 -> button3
                    4 -> button4
                    5 -> button5
                    6 -> button6
                    7 -> button7
                    8 -> button8
                    9 -> button9
                    else -> {button}
                }
            emptyCells.add(rnd);
              // move audio
            val audio = MediaPlayer.create(this , R.raw.poutch)
            audio.start()
            Handler().postDelayed(Runnable { audio.release() } , 500)
            buttonselected.text = "O"
            buttonselected.setTextColor(Color.parseColor("#D22BB804"))
            player2.add(rnd)
            buttonselected.isEnabled = false
            var checkWinner = checkwinner()
            if(checkWinner == 1)
                Handler().postDelayed(Runnable { reset() } , 2000)
     }
}

让我们尝试以单模式播放：

第4步：现在，让我们实现我们应用的主要功能，即在线模式

在这里，我们将使用Firebase来实现我们的后端功能。因此，我们在这里正在侦听特定的代码数据库，如果数据库中有任何更改，则在客户端运行一个事件以更新对手的举动。

科特林

// Here we are using firebase method addChildEventListener to listen the database for events.
FirebaseDatabase.getInstance().reference.child("data").child(code).addChildEventListener(object : ChildEventListener{
            override fun onCancelled(error: DatabaseError) {
                TODO("Not yet implemented")
            }
  
            override fun onChildMoved(snapshot: DataSnapshot, previousChildName: String?) {
                TODO("Not yet implemented")
            }
  
            override fun onChildChanged(snapshot: DataSnapshot, previousChildName: String?) {
                TODO("Not yet implemented")
            }
            // this event happens when a new data added to a database.
            override fun onChildAdded(snapshot: DataSnapshot, previousChildName: String?) {
                var data = snapshot.value
                if(isMyMove==true){
                    isMyMove = false
                    moveonline(data.toString() , isMyMove)
                }
                else{
                    isMyMove = true
                    moveonline(data.toString() , isMyMove)
                }
  
            }
            // this will happen when any player click on the reset button
            override fun onChildRemoved(snapshot: DataSnapshot) {
                reset()
                errorMsg("Game Reset")
            }
     })
}

步骤5：建立4个新的空白活动

请参阅本文如何使用快捷方式在Android Studio中创建新活动并创建4个新的空活动并将该活动命名为Firstpage ，SecondPage，ThirdPage和CodeActivity。以下是分别用于XML和Kotlin文件的该活动文件的代码。

科特林

package com.example.tictactoeapp
  
import android.content.Intent
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import kotlinx.android.synthetic.main.activity_firstpage.*
  
var singleUser = false
  
class Firstpage : AppCompatActivity() {
  
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_firstpage)
  
        button11.setOnClickListener {
            startActivity(Intent(this, MainActivity::class.java))
            singleUser = true;
        }
        button12.setOnClickListener {
            startActivity(Intent(this, SecondPage::class.java))
            singleUser = false;
        }
    }
  
    override fun onBackPressed() {
        ActivityCompat.finishAffinity(this)
    }
}

科特林

package com.example.tictactoeapp
  
import android.content.Intent
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_second_page.*
  
var Online = true;
  
class SecondPage : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_second_page)
        buttonOnline.setOnClickListener {
            startActivity(Intent(this, CodeActivity::class.java))
            singleUser = true;
            Online = true;
        }
        buttonOffline.setOnClickListener {
            startActivity(Intent(this, MainActivity::class.java))
            singleUser = false;
            Online = false;
        }
    }
}

科特林

package com.example.tictactoeapp
  
import android.graphics.Color
import android.media.MediaPlayer
import android.os.Bundle
import android.os.Handler
import android.view.View
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import com.google.firebase.database.ChildEventListener
import com.google.firebase.database.DataSnapshot
import com.google.firebase.database.DatabaseError
import com.google.firebase.database.FirebaseDatabase
import kotlinx.android.synthetic.main.activity_third_page.*
import kotlin.system.exitProcess
  
var isMyMove = isCodeMaker;
  
class ThirdPage : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_third_page)
        button110.setOnClickListener {
            reset()
        }
        FirebaseDatabase.getInstance().reference.child("data").child(code)
            .addChildEventListener(object : ChildEventListener {
                override fun onCancelled(error: DatabaseError) {
                    TODO("Not yet implemented")
                }
  
                override fun onChildMoved(snapshot: DataSnapshot, previousChildName: String?) {
                    TODO("Not yet implemented")
                }
  
                override fun onChildChanged(snapshot: DataSnapshot, previousChildName: String?) {
                    TODO("Not yet implemented")
                }
  
                override fun onChildAdded(snapshot: DataSnapshot, previousChildName: String?) {
                    var data = snapshot.value
                    if (isMyMove == true) {
                        isMyMove = false
                        moveonline(data.toString(), isMyMove)
                    } else {
                        isMyMove = true
                        moveonline(data.toString(), isMyMove)
                    }
  
  
                }
  
                override fun onChildRemoved(snapshot: DataSnapshot) {
                    reset()
                    errorMsg("Game Reset")
                }
  
            })
    }
  
    var player1Count = 0
    var player2Count = 0
    fun clickfun(view: View) {
        if (isMyMove) {
            val but = view as Button
            var cellOnline = 0
            when (but.id) {
                R.id.button11 -> cellOnline = 1
                R.id.button12 -> cellOnline = 2
                R.id.button13 -> cellOnline = 3
                R.id.button14 -> cellOnline = 4
                R.id.button15 -> cellOnline = 5
                R.id.button16 -> cellOnline = 6
                R.id.button17 -> cellOnline = 7
                R.id.button18 -> cellOnline = 8
                R.id.button19 -> cellOnline = 9
                else -> {
                    cellOnline = 0
                }
  
            }
            playerTurn = false;
            Handler().postDelayed(Runnable { playerTurn = true }, 600)
            playnow(but, cellOnline)
            updateDatabase(cellOnline);
  
        } else {
            Toast.makeText(this, "Wait for your turn", Toast.LENGTH_LONG).show()
        }
    }
  
    var player1 = ArrayList()
    var player2 = ArrayList()
    var emptyCells = ArrayList()
    var activeUser = 1
    fun playnow(buttonSelected: Button, currCell: Int) {
        val audio = MediaPlayer.create(this, R.raw.poutch)
  
        buttonSelected.text = "X"
        emptyCells.remove(currCell)
        textView3.text = "Turn : Player 2"
        buttonSelected.setTextColor(Color.parseColor("#EC0C0C"))
        player1.add(currCell)
        emptyCells.add(currCell)
        audio.start()
        //Handler().postDelayed(Runnable { audio.pause() } , 500)
        buttonSelected.isEnabled = false
        Handler().postDelayed(Runnable { audio.release() }, 200)
        checkwinner()
        /*val checkWinner = checkwinner()
        if(checkWinner == 1) {
            Handler().postDelayed(Runnable { reset() }, 2000)
        }*/
  
        /*else
        {
            buttonSelected.text = "O"
            audio.start()
            buttonSelected.setTextColor(Color.parseColor("#D22BB804"))
            //Handler().postDelayed(Runnable { audio.pause() } , 500)
            activeUser = 1
            player2.add(currCell)
            emptyCells.add(currCell)
            Handler().postDelayed(Runnable { audio.release() } , 200)
            buttonSelected.isEnabled = false
            val checkWinner  = checkwinner()
            if(checkWinner == 1)
                Handler().postDelayed(Runnable { reset() } , 4000)
        }*/
  
    }
  
    fun moveonline(data: String, move: Boolean) {
        val audio = MediaPlayer.create(this, R.raw.poutch)
  
        if (move) {
            var buttonselected: Button?
            buttonselected = when (data.toInt()) {
                1 -> button11
                2 -> button12
                3 -> button13
                4 -> button14
                5 -> button15
                6 -> button16
                7 -> button17
                8 -> button18
                9 -> button19
                else -> {
                    button11
                }
            }
            buttonselected.text = "O"
            textView3.text = "Turn : Player 1"
            buttonselected.setTextColor(Color.parseColor("#D22BB804"))
            player2.add(data.toInt())
            emptyCells.add(data.toInt())
            audio.start()
            //Handler().postDelayed(Runnable { audio.pause() } , 500)
            Handler().postDelayed(Runnable { audio.release() }, 200)
            buttonselected.isEnabled = false
            checkwinner()
        }
    }
  
    fun updateDatabase(cellId: Int) {
        FirebaseDatabase.getInstance().reference.child("data").child(code).push().setValue(cellId);
    }
  
    fun checkwinner(): Int {
        val audio = MediaPlayer.create(this, R.raw.success)
        if ((player1.contains(1) && player1.contains(2) && player1.contains(3)) || (player1.contains(
                1
            ) && player1.contains(4) && player1.contains(7)) ||
            (player1.contains(3) && player1.contains(6) && player1.contains(9)) || (player1.contains(
                7
            ) && player1.contains(8) && player1.contains(9)) ||
            (player1.contains(4) && player1.contains(5) && player1.contains(6)) || (player1.contains(
                1
            ) && player1.contains(5) && player1.contains(9)) ||
            player1.contains(3) && player1.contains(5) && player1.contains(7) || (player1.contains(2) && player1.contains(
                5
            ) && player1.contains(8))
        ) {
            player1Count += 1
            buttonDisable()
            audio.start()
            disableReset()
            Handler().postDelayed(Runnable { audio.release() }, 4000)
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Over")
            build.setMessage("Player 1 Wins!!" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                reset()
                audio.release()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                audio.release()
                removeCode()
                exitProcess(1)
  
            }
            Handler().postDelayed(Runnable { build.show() }, 2000)
            return 1
  
  
        } else if ((player2.contains(1) && player2.contains(2) && player2.contains(3)) || (player2.contains(
                1
            ) && player2.contains(4) && player2.contains(7)) ||
            (player2.contains(3) && player2.contains(6) && player2.contains(9)) || (player2.contains(
                7
            ) && player2.contains(8) && player2.contains(9)) ||
            (player2.contains(4) && player2.contains(5) && player2.contains(6)) || (player2.contains(
                1
            ) && player2.contains(5) && player2.contains(9)) ||
            player2.contains(3) && player2.contains(5) && player2.contains(7) || (player2.contains(2) && player2.contains(
                5
            ) && player2.contains(8))
        ) {
            player2Count += 1
            audio.start()
            buttonDisable()
            disableReset()
            Handler().postDelayed(Runnable { audio.release() }, 4000)
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Over")
            build.setMessage("Player 2 Wins!!" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                reset()
                audio.release()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                audio.release()
                removeCode()
                exitProcess(1)
            }
            Handler().postDelayed(Runnable { build.show() }, 2000)
            return 1
        } else if (emptyCells.contains(1) && emptyCells.contains(2) && emptyCells.contains(3) && emptyCells.contains(
                4
            ) && emptyCells.contains(5) && emptyCells.contains(6) && emptyCells.contains(7) &&
            emptyCells.contains(8) && emptyCells.contains(9)
        ) {
  
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Draw")
            build.setMessage("Nobody Wins" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                audio.release()
                reset()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                audio.release()
                exitProcess(1)
                removeCode()
            }
            build.show()
            return 1
  
        }
        return 0
    }
  
    fun reset() {
        player1.clear()
        player2.clear()
        emptyCells.clear()
        activeUser = 1;
        for (i in 1..9) {
            var buttonselected: Button?
            buttonselected = when (i) {
                1 -> button11
                2 -> button12
                3 -> button13
                4 -> button14
                5 -> button15
                6 -> button16
                7 -> button17
                8 -> button18
                9 -> button19
                else -> {
                    button11
                }
            }
            buttonselected.isEnabled = true
            buttonselected.text = ""
            textView.text = "Player1 : $player1Count"
            textView2.text = "Player2 : $player2Count"
            isMyMove = isCodeMaker
            //startActivity(Intent(this,ThirdPage::class.java))
            if (isCodeMaker) {
                FirebaseDatabase.getInstance().reference.child("data").child(code).removeValue()
            }
  
  
        }
    }
  
    fun buttonDisable() {
        for (i in 1..9) {
            val buttonSelected = when (i) {
                1 -> button11
                2 -> button12
                3 -> button13
                4 -> button14
                5 -> button15
                6 -> button16
                7 -> button17
                8 -> button18
                9 -> button19
                else -> {
                    button11
                }
  
            }
            if (buttonSelected.isEnabled == true)
                buttonSelected.isEnabled = false
        }
    }
  
    fun buttoncelldisable() {
        emptyCells.forEach {
            val buttonSelected = when (it) {
                1 -> button11
                2 -> button12
                3 -> button13
                4 -> button14
                5 -> button15
                6 -> button16
                7 -> button17
                8 -> button18
                9 -> button19
                else -> {
                    button11
                }
  
            }
            if (buttonSelected.isEnabled == true)
                buttonSelected.isEnabled = false;
        }
    }
  
    fun removeCode() {
        if (isCodeMaker) {
            FirebaseDatabase.getInstance().reference.child("codes").child(keyValue).removeValue()
        }
    }
  
    fun errorMsg(value: String) {
        Toast.makeText(this, value, Toast.LENGTH_SHORT).show()
    }
  
    fun disableReset() {
        button110.isEnabled = false
        Handler().postDelayed(Runnable { button110.isEnabled = true }, 2200)
    }
  
    override fun onBackPressed() {
        removeCode()
        if (isCodeMaker) {
            FirebaseDatabase.getInstance().reference.child("data").child(code).removeValue()
        }
        exitProcess(0)
    }
}

科特林

package com.example.tictactoeapp
  
import android.content.Intent
import android.os.Bundle
import android.os.Handler
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.google.firebase.database.DataSnapshot
import com.google.firebase.database.DatabaseError
import com.google.firebase.database.FirebaseDatabase
import com.google.firebase.database.ValueEventListener
import kotlinx.android.synthetic.main.activity_code.*
  
var isCodeMaker = true;
var code = "null";
var codeFound = false
var checkTemp = true
var keyValue: String = "null"
  
class CodeActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_code)
        Create.setOnClickListener {
            code = "null";
            codeFound = false
            checkTemp = true
            keyValue = "null"
            code = GameCode.text.toString()
            Create.visibility = View.GONE
            Join.visibility = View.GONE
            GameCode.visibility = View.GONE
            textView4.visibility = View.GONE
            progressBar.visibility = View.VISIBLE
            if (code != "null" && code != null && code != "") {
  
                isCodeMaker = true;
                FirebaseDatabase.getInstance().reference.child("codes")
                    .addValueEventListener(object : ValueEventListener {
                        override fun onCancelled(error: DatabaseError) {
                            TODO("Not yet implemented")
                        }
  
                        override fun onDataChange(snapshot: DataSnapshot) {
                            var check = isValueAvailable(snapshot, code)
  
                            Handler().postDelayed({
                                if (check == true) {
                                    Create.visibility = View.VISIBLE
                                    Join.visibility = View.VISIBLE
                                    GameCode.visibility = View.VISIBLE
                                    textView4.visibility = View.VISIBLE
                                    progressBar.visibility = View.GONE
  
                                } else {
                                    FirebaseDatabase.getInstance().reference.child("codes").push()
                                        .setValue(code)
                                    isValueAvailable(snapshot, code)
                                    checkTemp = false
                                    Handler().postDelayed({
                                        accepted()
                                        errorMsg("Please don't go back")
                                    }, 300)
  
                                }
                            }, 2000)
  
  
                        }
  
                    })
            } else {
                Create.visibility = View.VISIBLE
                Join.visibility = View.VISIBLE
                GameCode.visibility = View.VISIBLE
                textView4.visibility = View.VISIBLE
                progressBar.visibility = View.GONE
                errorMsg("Enter Code Properly")
            }
        }
        Join.setOnClickListener {
            code = "null";
            codeFound = false
            checkTemp = true
            keyValue = "null"
            code = GameCode.text.toString()
            if (code != "null" && code != null && code != "") {
                Create.visibility = View.GONE
                Join.visibility = View.GONE
                GameCode.visibility = View.GONE
                textView4.visibility = View.GONE
                progressBar.visibility = View.VISIBLE
                isCodeMaker = false;
                FirebaseDatabase.getInstance().reference.child("codes")
                    .addValueEventListener(object : ValueEventListener {
                        override fun onCancelled(error: DatabaseError) {
                            TODO("Not yet implemented")
                        }
  
                        override fun onDataChange(snapshot: DataSnapshot) {
                            var data: Boolean = isValueAvailable(snapshot, code)
  
                            Handler().postDelayed({
                                if (data == true) {
                                    codeFound = true
                                    accepted()
                                    Create.visibility = View.VISIBLE
                                    Join.visibility = View.VISIBLE
                                    GameCode.visibility = View.VISIBLE
                                    textView4.visibility = View.VISIBLE
                                    progressBar.visibility = View.GONE
                                } else {
                                    Create.visibility = View.VISIBLE
                                    Join.visibility = View.VISIBLE
                                    GameCode.visibility = View.VISIBLE
                                    textView4.visibility = View.VISIBLE
                                    progressBar.visibility = View.GONE
                                    errorMsg("Invalid Code")
                                }
                            }, 2000)
  
  
                        }
  
  
                    })
  
            } else {
                errorMsg("Enter Code Properly")
            }
        }
  
    }
  
    fun accepted() {
        startActivity(Intent(this, ThirdPage::class.java));
        Create.visibility = View.VISIBLE
        Join.visibility = View.VISIBLE
        GameCode.visibility = View.VISIBLE
        textView4.visibility = View.VISIBLE
        progressBar.visibility = View.GONE
  
    }
  
    fun errorMsg(value: String) {
        Toast.makeText(this, value, Toast.LENGTH_SHORT).show()
    }
  
    fun isValueAvailable(snapshot: DataSnapshot, code: String): Boolean {
        var data = snapshot.children
        data.forEach {
            var value = it.getValue().toString()
            if (value == code) {
                keyValue = it.key.toString()
                return true;
            }
        }
        return false
    }
}

以下是MainActivity.kt文件的完整代码。

科特林

package com.example.tictactoeapp
  
import android.graphics.Color
import android.media.MediaPlayer
import android.os.Bundle
import android.os.Handler
import android.view.View
import android.widget.Button
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*
import kotlin.system.exitProcess
  
var playerTurn = true
  
class MainActivity : AppCompatActivity() {
  
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        button10.setOnClickListener {
            reset()
  
        }
    }
  
    var player1Count = 0
    var player2Count = 0
    fun clickfun(view: View) {
        if (playerTurn) {
            val but = view as Button
            var cellID = 0
            //Toast.makeText(this,but.id.toString() , Toast.LENGTH_SHORT).show();
            when (but.id) {
                R.id.button -> cellID = 1
                R.id.button2 -> cellID = 2
                R.id.button3 -> cellID = 3
                R.id.button4 -> cellID = 4
                R.id.button5 -> cellID = 5
                R.id.button6 -> cellID = 6
                R.id.button7 -> cellID = 7
                R.id.button8 -> cellID = 8
                R.id.button9 -> cellID = 9
  
            }
            playerTurn = false;
            Handler().postDelayed(Runnable { playerTurn = true }, 600)
            playnow(but, cellID)
  
        }
    }
  
    var player1 = ArrayList()
    var player2 = ArrayList()
    var emptyCells = ArrayList()
    var activeUser = 1
    fun playnow(buttonSelected: Button, currCell: Int) {
        val audio = MediaPlayer.create(this, R.raw.poutch)
        if (activeUser == 1) {
            buttonSelected.text = "X"
            buttonSelected.setTextColor(Color.parseColor("#EC0C0C"))
            player1.add(currCell)
            emptyCells.add(currCell)
            audio.start()
            //Handler().postDelayed(Runnable { audio.pause() } , 500)
            buttonSelected.isEnabled = false
            Handler().postDelayed(Runnable { audio.release() }, 200)
            val checkWinner = checkwinner()
            if (checkWinner == 1) {
                Handler().postDelayed(Runnable { reset() }, 2000)
            } else if (singleUser) {
                Handler().postDelayed(Runnable { robot() }, 500)
                //Toast.makeText(this , "Calling Robot" , Toast.LENGTH_SHORT).show()
            } else
                activeUser = 2
  
        } else {
            buttonSelected.text = "O"
            audio.start()
            buttonSelected.setTextColor(Color.parseColor("#D22BB804"))
            //Handler().postDelayed(Runnable { audio.pause() } , 500)
            activeUser = 1
            player2.add(currCell)
            emptyCells.add(currCell)
            Handler().postDelayed(Runnable { audio.release() }, 200)
            buttonSelected.isEnabled = false
            val checkWinner = checkwinner()
            if (checkWinner == 1)
                Handler().postDelayed(Runnable { reset() }, 4000)
        }
  
    }
  
    fun checkwinner(): Int {
        val audio = MediaPlayer.create(this, R.raw.success)
        if ((player1.contains(1) && player1.contains(2) && player1.contains(3)) || (player1.contains(
                1
            ) && player1.contains(4) && player1.contains(7)) ||
            (player1.contains(3) && player1.contains(6) && player1.contains(9)) || (player1.contains(
                7
            ) && player1.contains(8) && player1.contains(9)) ||
            (player1.contains(4) && player1.contains(5) && player1.contains(6)) || (player1.contains(
                1
            ) && player1.contains(5) && player1.contains(9)) ||
            player1.contains(3) && player1.contains(5) && player1.contains(7) || (player1.contains(2) && player1.contains(
                5
            ) && player1.contains(8))
        ) {
            player1Count += 1
            buttonDisable()
            audio.start()
            disableReset()
            Handler().postDelayed(Runnable { audio.release() }, 4000)
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Over")
            build.setMessage("Player 1 Wins!!" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                reset()
                audio.release()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                audio.release()
                exitProcess(1)
  
            }
            Handler().postDelayed(Runnable { build.show() }, 2000)
            return 1
  
  
        } else if ((player2.contains(1) && player2.contains(2) && player2.contains(3)) || (player2.contains(
                1
            ) && player2.contains(4) && player2.contains(7)) ||
            (player2.contains(3) && player2.contains(6) && player2.contains(9)) || (player2.contains(
                7
            ) && player2.contains(8) && player2.contains(9)) ||
            (player2.contains(4) && player2.contains(5) && player2.contains(6)) || (player2.contains(
                1
            ) && player2.contains(5) && player2.contains(9)) ||
            player2.contains(3) && player2.contains(5) && player2.contains(7) || (player2.contains(2) && player2.contains(
                5
            ) && player2.contains(8))
        ) {
            player2Count += 1
            audio.start()
            buttonDisable()
            disableReset()
            Handler().postDelayed(Runnable { audio.release() }, 4000)
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Over")
            build.setMessage("Player 2 Wins!!" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                reset()
                audio.release()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                audio.release()
                exitProcess(1)
            }
            Handler().postDelayed(Runnable { build.show() }, 2000)
            return 1
        } else if (emptyCells.contains(1) && emptyCells.contains(2) && emptyCells.contains(3) && emptyCells.contains(
                4
            ) && emptyCells.contains(5) && emptyCells.contains(6) && emptyCells.contains(7) &&
            emptyCells.contains(8) && emptyCells.contains(9)
        ) {
  
            val build = AlertDialog.Builder(this)
            build.setTitle("Game Draw")
            build.setMessage("Nobody Wins" + "\n\n" + "Do you want to play again")
            build.setPositiveButton("Ok") { dialog, which ->
                reset()
            }
            build.setNegativeButton("Exit") { dialog, which ->
                exitProcess(1)
            }
            build.show()
            return 1
  
        }
        return 0
    }
  
    fun reset() {
        player1.clear()
        player2.clear()
        emptyCells.clear()
        activeUser = 1;
        for (i in 1..9) {
            var buttonselected: Button?
            buttonselected = when (i) {
                1 -> button
                2 -> button2
                3 -> button3
                4 -> button4
                5 -> button5
                6 -> button6
                7 -> button7
                8 -> button8
                9 -> button9
                else -> {
                    button
                }
            }
            buttonselected.isEnabled = true
            buttonselected.text = ""
            textView.text = "Player1 : $player1Count"
            textView2.text = "Player2 : $player2Count"
        }
    }
  
    fun robot() {
        val rnd = (1..9).random()
        if (emptyCells.contains(rnd))
            robot()
        else {
            val buttonselected: Button?
            buttonselected = when (rnd) {
                1 -> button
                2 -> button2
                3 -> button3
                4 -> button4
                5 -> button5
                6 -> button6
                7 -> button7
                8 -> button8
                9 -> button9
                else -> {
                    button
                }
            }
            emptyCells.add(rnd);
            val audio = MediaPlayer.create(this, R.raw.poutch)
            audio.start()
            Handler().postDelayed(Runnable { audio.release() }, 500)
            buttonselected.text = "O"
            buttonselected.setTextColor(Color.parseColor("#D22BB804"))
            player2.add(rnd)
            buttonselected.isEnabled = false
            var checkWinner = checkwinner()
            if (checkWinner == 1)
                Handler().postDelayed(Runnable { reset() }, 2000)
  
        }
    }
  
    fun buttonDisable() {
        for (i in 1..9) {
            val buttonSelected = when (i) {
                1 -> button
                2 -> button2
                3 -> button3
                4 -> button4
                5 -> button5
                6 -> button6
                7 -> button7
                8 -> button8
                9 -> button9
                else -> {
                    button
                }
  
            }
            if (buttonSelected.isEnabled == true)
                buttonSelected.isEnabled = false
        }
    }
  
    fun disableReset() {
        button10.isEnabled = false
        Handler().postDelayed(Runnable { button10.isEnabled = true }, 2200)
    }
}

现在，在实现在线模式功能之后，我们就完成了Tic tac toe项目。

输出：

有关完整的源代码，请单击此处。

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