Minesweeper for Android

An Android Minesweeper game built with Kotlin and Jetpack Compose.

The Kotlin app running on an Android emulator. Revealing an empty cell opens its connected neighborhood. View full size (new tab): Minesweeper on Android with an opened area, adjacent-mine counts, and remaining hidden cells

A board drawn on Canvas

The game uses a 5 × 5 board with three mines. A single Compose Canvas draws the checkerboard tiles, numbers, mines, and flags. Tap coordinates are converted into a row and column; a long press selects the flag action. The ViewModel holds the board and game state, while the activity draws the current state.

A safe first move

Mines are placed only after the first tap, excluding that selected square. The game then calculates each cell’s neighboring-mine count. The timer starts with that first reveal and stops when the game ends.

Before the first tap: the board is covered, the timer is stopped, and no mines have been placed. View full size (new tab): Unopened five-by-five Minesweeper board with three flags remaining and timer at zero

Revealing an area

If a revealed cell has no neighboring mines, a recursive flood fill visits its neighbors. Already revealed cells and board boundaries stop recursion; numbered cells are revealed but do not expand further. The captured game shows the open area produced by this rule.

Winning, losing, and restarting

The assignment has two win conditions: reveal all 22 safe cells or flag all three mines. Revealing a mine loses the game, and flagging a safe cell also ends it. At the end, the app reveals every mine and shows a result dialog. Further board input is ignored until New Game resets the board and timer.