2048游戏是一款经典的数字合成益智游戏，2048游戏以其简单的规则、易于上手的操作和富有挑战性的玩法而受到广大玩家的喜爱。不仅锻炼了玩家的逻辑思维和策略规划能力，还提供了放松和娱乐的休闲方式。

游戏说明

游戏规则

得分规则

游戏策略

实现思路1.使用2维数组表示游戏棋盘，在界面中形成一个4*4的棋盘，在布局中添加GridLayout显示棋盘，添加TextView用来显示游戏分数

private val board = Array(4) { IntArray(4) }

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FAF8EF">
    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:text="2048"
        android:textColor="#776E65"
        android:textSize="48sp"
        android:textStyle="bold"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <TextView
        android:id="@+id/scoreTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:text="Score: 0"
        android:textColor="#776E65"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/titleTextView" />
    <GridLayout
        android:id="@+id/gridLayout"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="16dp"
        android:background="#BBADA0"
        android:columnCount="4"
        android:padding="4dp"
        android:rowCount="4"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/titleTextView" />
androidx.constraintlayout.widget.ConstraintLayout>

2.通过手势检测来触发移动操作

private lateinit var gestureDetector: GestureDetector

gestureDetector用于检测手势的GestureDetector，拦截触摸事件并计算出手势的方向，调用相应的移动函数 (moveLeft, moveRight, moveUp, moveDown)进行游戏控制

override fun onTouchEvent(event: MotionEvent): Boolean {
    return gestureDetector.onTouchEvent(event) || super.onTouchEvent(event)
}
override fun onDown(e: MotionEvent): Boolean = true
override fun onFling(
    e1: MotionEvent?,
    e2: MotionEvent,
    velocityX: Float,
    velocityY: Float
): Boolean {
    val diffX = e2.x - (e1?.x ?: 0f)
    val diffY = e2.y - (e1?.y ?: 0f)
    if (Math.abs(diffX) > Math.abs(diffY)) {
        if (diffX > 0) {
            moveRight()
        } else {
            moveLeft()
        }
    } else {
        if (diffY > 0) {
            moveDown()
        } else {
            moveUp()
        }
    }
    addNewTile()
    updateUI()
    return true
}

3.每次移动后，检查并合并相同的数字

以moveLeft为例，对每一行进行操作，过滤掉0，将非0数字靠左排列，合并相邻的相同数字

private fun moveLeft() {
    var changed = false
    for (i in 0 until 4) {
        val row = board[i].filter { it != 0 }.toMutableList()
        var j = 0

        while (j < row.size - 1) {
            if (row[j] == row[j + 1]) {
                row[j] *= 2
                score += row[j]
                row.removeAt(j + 1)
                changed = true
            }
            j++
        }
        while (row.size < 4) {
            row.add(0)
        }
        if (board[i] != row.toIntArray()) {
            changed = true
        }
        board[i] = row.toIntArray()
    }
    if (changed) {
        addNewTile()
    }
    checkGameOver()
}

填充0到4个格子，如果检测到有变化，添加新方块格子

4.每次有效移动后，在空白位置随机添加新的数字(2或4)

private fun addNewTile() {
    val emptyTiles = mutableListOfInt, Int>>()
    for (i in 0 until 4) {
        for (j in 0 until 4) {
            if (board[i][j] == 0) {
                emptyTiles.add(Pair(i, j))
            }
        }
    }
    if (emptyTiles.isNotEmpty()) {
        val (i, j) = emptyTiles[Random.nextInt(emptyTiles.size)]
        board[i][j] = if (Random.nextFloat() < 0.9f) 2 else 4
    }
}

90%概率放置2，10%概率放置4

5.实时更新UI以反映游戏状态

private fun updateUI() {
    gridLayout.removeAllViews()
    for (i in 0 until 4) {
        for (j in 0 until 4) {
            val tileView = TextView(this)
            tileView.text = if (board[i][j] != 0) board[i][j].toString() else ""
            tileView.setBackgroundResource(getTileBackground(board[i][j]))
            tileView.setTextColor(ContextCompat.getColor(this, getTileTextColor(board[i][j])))
            tileView.textSize = 24f
            tileView.gravity = android.view.Gravity.CENTER
            val params = GridLayout.LayoutParams()
            params.width = 0
            params.height = 0
            params.columnSpec = GridLayout.spec(j, 1f)
            params.rowSpec = GridLayout.spec(i, 1f)
            params.setMargins(4, 4, 4, 4)
            tileView.layoutParams = params
            gridLayout.addView(tileView)
        }
    }
    scoreTextView.text = "分数: $score"
}

清空gridLayout，根据board数组重新生成所有方块，设置方块的背景颜色和文字颜色，最后更新分数显示

6.持续检查游戏是否结束

private fun isGameOver(): Boolean {
    for (i in 0 until 4) {
        for (j in 0 until 4) {
            if (board[i][j] == 0) {
                return false
            }
        }
    }
    for (i in 0 until 4) {
        for (j in 0 until 4) {
            if (i < 3 && board[i][j] == board[i + 1][j]) {
                return false
            }
            if (j < 3 && board[i][j] == board[i][j + 1]) {
                return false
            }
        }
    }
    return true
}

检查是否还有空格，检查是否有相邻的相同数字，如果两者都没有游戏结束

完整代码

/Reathin/Sam…