Android扫雷游戏源码分析.doc

No.27第1章 游戏源码1.1 MinesweeperGamepackage com.VertexVerveInc.Games;import java.util.Random;import android.app.Activity;import android.graphics.Typeface;import android.os.Bundle;import android.os.Handler;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnLongClickListener;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TableRow.LayoutParams;import android.widget.TableLayout;import android.widget.TableRow;import android.widget.TextView;import android.widget.Toast;public class MinesweeperGame extends Activityprivate TextView txtMineCount;private TextView txtTimer;private ImageButton btnSmile;private TableLayout mineField; / table layout to add mines toprivate Block blocks; / blocks for mine fieldprivate int blockDimension = 24; / width of each blockprivate int blockPadding = 2; / padding between blocksprivate int numberOfRowsInMineField = 9;private int numberOfColumnsInMineField = 9;private int totalNumberOfMines = 10;/ timer to keep track of time elapsedprivate Handler timer = new Handler();private int secondsPassed = 0;private boolean isTimerStarted; / check if timer already started or notprivate boolean areMinesSet; / check if mines are planted in blocksprivate boolean isGameOver;private int minesToFind; / number of mines yet to be discoveredOverridepublic void onCreate(Bundle savedInstanceState)super.onCreate(savedInstanceState);setContentView(R.layout.main);txtMineCount = (TextView) findViewById(R.id.MineCount);txtTimer = (TextView) findViewById(R.id.Timer);/ set font style for timer and mine count to LCD styleTypeface lcdFont = Typeface.createFromAsset(getAssets(),fonts/lcd2mono.ttf);txtMineCount.setTypeface(lcdFont);txtTimer.setTypeface(lcdFont);btnSmile = (ImageButton) findViewById(R.id.Smiley);btnSmile.setOnClickListener(new OnClickListener()Overridepublic void onClick(View view)endExistingGame();startNewGame(););mineField = (TableLayout)findViewById(R.id.MineField);showDialog(Click smiley to start New Game, 2000, true, false);private void startNewGame()/ plant mines and do rest of the calculationscreateMineField();/ display all blocks in UIshowMineField();minesToFind = totalNumberOfMines;isGameOver = false;secondsPassed = 0;private void showMineField()/ remember we will not show 0th and last Row and Columns/ they are used for calculation purposes onlyfor (int row = 1; row numberOfRowsInMineField + 1; row+)TableRow tableRow = new TableRow(this); tableRow.setLayoutParams(new LayoutParams(blockDimension + 2 * blockPadding) * numberOfColumnsInMineField, blockDimension + 2 * blockPadding);for (int column = 1; column numberOfColumnsInMineField + 1; column+)blocksrowcolumn.setLayoutParams(new LayoutParams( blockDimension + 2 * blockPadding, blockDimension + 2 * blockPadding); blocksrowcolumn.setPadding(blockPadding, blockPadding, blockPadding, blockPadding);tableRow.addView(blocksrowcolumn);mineField.addView(tableRow,new TableLayout.LayoutParams( (blockDimension + 2 * blockPadding) * numberOfColumnsInMineField, blockDimension + 2 * blockPadding); private void endExistingGame()stopTimer(); / stop if timer is runningtxtTimer.setText(000); / revert all texttxtMineCount.setText(000); / revert mines countbtnSmile.setBackgroundResource(R.drawable.smile);/ remove all rows from mineField TableLayoutmineField.removeAllViews();/ set all variables to support end of gameisTimerStarted = false;areMinesSet = false;isGameOver = false;minesToFind = 0;private void createMineField()/ we take one row extra row for each side/ overall two extra rows and two extra columns/ first and last row/column are used for calculations purposes only/ x|xxxxxxxxxxxxxx|x/ -/ x| |x/ x| |x/ -/ x|xxxxxxxxxxxxxx|x/ the row and columns marked as x are just used to keep counts of near by minesblocks = new BlocknumberOfRowsInMineField + 2numberOfColumnsInMineField + 2;for (int row = 0; row numberOfRowsInMineField + 2; row+)for (int column = 0; column 0) & !isGameOver)int nearbyFlaggedBlocks = 0;for (int previousRow = -1; previousRow 2; previousRow+)for (int previousColumn = -1; previousColumn 2; previousColumn+)if (blockscurrentRow + previousRowcurrentColumn + previousColumn.isFlagged()nearbyFlaggedBlocks+;/ if flagged block count is equal to nearby mine count/ then open nearby blocksif (nearbyFlaggedBlocks = blockscurrentRowcurrentColumn.getNumberOfMinesInSorrounding()for (int previousRow = -1; previousRow 2; previousRow+)for (int previousColumn = -1; previousColumn 2; previousColumn+)/ dont open flagged blocksif (!blockscurrentRow + previousRowcurrentColumn + previousColumn.isFlagged()/ open blocks till we get numbered blockrippleUncover(currentRow + previousRow, currentColumn + previousColumn);/ did we clicked a mineif (blockscurrentRow + previousRowcurrentColumn + previousColumn.hasMine()/ oops game overfinishGame(currentRow + previousRow, currentColumn + previousColumn);/ did we win the gameif (checkGameWin()/ mark game as winwinGame();/ as we no longer want to judge this gesture so return/ not returning from here will actually trigger other action/ which can be marking as a flag or question mark or blankreturn true;/ if clicked block is enabled, clickable or flaggedif (blockscurrentRowcurrentColumn.isClickable() & (blockscurrentRowcurrentColumn.isEnabled() | blockscurrentRowcurrentColumn.isFlagged()/ for long clicks set:/ 1. empty blocks to flagged/ 2. flagged to question mark/ 3. question mark to blank/ case 1. set blank block to flaggedif (!blockscurrentRowcurrentColumn.isFlagged() & !blockscurrentRowcurrentColumn.isQuestionMarked()blockscurrentRowcurrentColumn.setBlockAsDisabled(false);blockscurrentRowcurrentColumn.setFlagIcon(true);blockscurrentRowcurrentColumn.setFlagged(true);minesToFind-; /reduce mine countupdateMineCountDisplay();/ case 2. set flagged to question markelse if (!blockscurrentRowcurrentColumn.isQuestionMarked()blockscurrentRowcurrentColumn.setBlockAsDisabled(true);blockscurrentRowcurrentColumn.setQuestionMarkIcon(true);blockscurrentRowcurrentColumn.setFlagged(false);blockscurrentRowcurrentColumn.setQuestionMarked(true);minesToFind+; / increase mine countupdateMineCountDisplay();/ case 3. change to blank squareelseblockscurrentRowcurrentColumn.setBlockAsDisabled(true);blockscurrentRowcurrentColumn.clearAllIcons();blockscurrentRowcurrentColumn.setQuestionMarked(false);/ if it is flagged then increment mine countif (blockscurrentRowcurrentColumn.isFlagged()minesToFind+; / increase mine countupdateMineCountDisplay();/ remove flagged statusblockscurrentRowcurrentColumn.setFlagged(false);updateMineCountDisplay(); / update mine displayreturn true;);private boolean checkGameWin()for (int row = 1; row numberOfRowsInMineField + 1; row+)for (int column = 1; column numberOfColumnsInMineField + 1; column+)if (!blocksrowcolumn.hasMine() & blocksrowcolumn.isCovered()return false;return true;private void updateMineCountDisplay()if (minesToFind 0)txtMineCount.setText(Integer.toString(minesToFind);else if (minesToFind 10)txtMineCount.setText(00 + Integer.toString(minesToFind);else if (minesToFind 100)txtMineCount.setText(0 + Integer.toString(minesToFind);elsetxtMineCount.setText(Integer.toString(minesToFind);private void winGame()stopTimer();isTimerStarted = false;isGameOver = true;minesToFind = 0; /set mine count to 0/set icon to cool dudebtnSmile.setBackgroundResource(R.drawable.cool);updateMineCountDisplay(); / update mine count/ disable all buttons/ set flagged all un-flagged blocksfor (int row = 1; row numberOfRowsInMineField + 1; row+)for (int column = 1; column numberOfColumnsInMineField + 1; column+)blocksrowcolumn.setClickable(false);if (blocksrowcolumn.hasMine()blocksrowcolumn.setBlockAsDisabled(false);blocksrowcolumn.setFlagIcon(true);/ show messageshowDialog(You won in + Integer.toString(secondsPassed) + seconds!, 1000, false, true);private void finishGame(int currentRow, int currentColumn)isGameOver = true; / mark game as overstopTimer(); / stop timerisTimerStarted = false;btnSmile.setBackgroundResource(R.drawable.sad);/ show all mines/ disable all blocksfor (int row = 1; row numberOfRowsInMineField + 1; row+)for (int column = 1; column numberOfColumnsInMineField + 1; column+)/ disable blockblocksrowcolumn.setBlockAsDisabled(false);/ block has mine and is not flaggedif (blocksrowcolumn.hasMine() & !blocksrowcolumn.isFlagged()/ set mine iconblocksrowcolumn.setMineIcon(false);/ block is flagged and doesnt not have mineif (!blocksrowcolumn.hasMine() & blocksrowcolumn.isFlagged()/ set flag iconblocksrowcolumn.setFlagIcon(false);/ block is flaggedif (blocksrowcolumn.isFlagged()/ disable the blockblocksrowcolumn.setClickable(false);/ trigger mineblockscurrentRowcurrentColumn.triggerMine();/ show messageshowDialog(You tried for + Integer.toString(secondsPassed) + seconds!, 1000, false, false);private void setMines(int currentRow, int currentColumn)/ set mines excluding the location where user clickedRandom rand = new Random();int mineRow, mineColumn;for (int row = 0; row totalNumberOfMines; row+)mineRow = rand.nextInt(numberOfColumnsInMineField);mineColumn = rand.nextInt(numberOfRowsInMineField);if (mineRow + 1 != currentColumn) | (mineColumn + 1 != currentRow)if (blocksmineColumn + 1mineRow + 1.hasMine()row-; / mine is already there, dont repeat for same block/ plant mine at this locationblocksmineColumn + 1mineRow + 1.plantMine();/ exclude the user clicked locationelserow-;int nearByMineCount;/ count number of mines in surrounding blocks for (int row = 0; row numberOfRowsInMineField + 2; row+)for (int column = 0; column numberOfColumnsInMineField + 2; column+)/ for each block find nearby mine countnearByMineCount = 0;if (row != 0) & (row != (numberOfRowsInMineField + 1) & (column != 0) & (column != (numberOfColumnsInMineField + 1)/ check in all nearby blocksfor (int previousRow = -1; previousRow 2; previousRow+)for (int previousColumn = -1; previousColumn 2; previousColumn+)if (blocksrow + previousRowcolumn + previousColumn.hasMine()/ a mine was found so increment the counternearByMineCount+;blocksrowcolumn.setNumberOfMinesInSurrounding(nearByMineCount);/ for side rows (0th and last row/column)/ set count as 9 and mark it as openedelseblocksrowcolumn.setNumberOfMinesInSurrounding(9);blocksrowcolumn.OpenBlock();private void rippleUncover(int rowClicked, int columnClicked)/ dont open flagged or mined rowsif (blocksrowClickedcolumnClicked.hasMine() | blocksrowClickedcolumnClicked.isFlagged()return;/ open clicked blockblocksrowClickedcolumnClicked.OpenBlock();/ if clicked block have nearby mines then dont open furtherif (blocksrowClickedcolumnClicked.getNumberOfMinesInSorrounding() != 0 )return;/ open next 3 rows and 3 columns recursivelyfor (int row = 0; row 3; row+)for (int column = 0; column 0) & (columnClicked + column - 1 0)& (rowClicked + row - 1 numberOfRowsInMineField + 1) & (columnClicked + column - 1 numberOfColumnsInMineField + 1)rippleUncover(rowClicked + row - 1, columnClicked + column - 1 ); return;public void startTimer()if (secondsPassed = 0) timer.removeCallbacks(updateTimeElasped);/ tell timer to run call back after 1 secondtimer.postDelayed(updateTimeElasped, 1000);public void stopTimer()/ disable call backstimer.removeCallbacks(updateTimeElasped);/ timer call back when timer is tickedprivate Runnable updateTimeElasped = new Runnable()public void run()long currentMilliseconds = System.currentTimeMillis();+secondsPassed;if (secondsPassed 10)txtTimer.setText(00 + Integer.toString(secondsPassed);else if (secondsPassed 100)txtTimer.setText(0 + Integer.toString(secondsPassed);elsetxtTimer.setText(Integer.toString(secondsPassed);/ add notificationtimer.postAtTime(this, currentMilliseconds);/ notify to call back after 1 seconds/ basically to remain in the timer looptimer.postDelayed(updateTimeElasped, 1000);private void showDialog(String message, int milliseconds, boolean useSmileImage, boolean useCoolImage)/ show messageToast dialog = Toast.makeText(getApplicationContext(),message,Toast.LENGTH_LONG);dialog.setGravity(Gravity.CENTER, 0, 0);LinearLayout dialogView = (LinearLayout) dialog.getView();ImageView coolImage = new ImageView(getApplicationContext();if (useSmileImage)coolImage.setImageResource(R.drawable.smile);else if (useCoolImage)coolImage.setImageResource(R.drawable.cool);elsecoolImage.setImageResource(R.drawable.sad);dialogView.addView(coolImage, 0);dialog.setDuration(milliseconds);dialog.show();1.2 Blockpackage com.VertexVerveInc.Games;import android.content.Context;import android.graphics.Color;import android.graphics.Typeface;import android.util.AttributeSet;import android.widget.Button;public class Block extends Buttonprivate boolean isCovered; / is block covered yetprivate boolean isMined; / does the block has a mine underneathprivate boolean isFlagged; / is block flagged as a potential mineprivate boolean isQuestionMarked; / is block question markedprivate boolean isClickable; / can block accept click eventsprivate int numberOfMinesInSurrounding; / number of mines in nearby blockspublic Block(Context context)super(context);public Block(Context context, AttributeSet attrs)super(context, attrs);public Block(Context context, AttributeSet attrs, int defStyle)super(context, attrs, defStyle);/ set default properties for the blockpublic void setDefaults()isCovered = true;isMined = false;isFlagged = false;isQuestionMarked = false;isClickable = true;numberOfMinesInSurrounding = 0;this.setBackgroundResource(R.drawable.square_blue);setBoldFont();/ mark the block as disabled/opened/ update the number of nearby minespublic void setNumberOfSurroundingMines(int number)this.setBackgroundResource(R.drawable.square_grey);updateNumber(number);/ set mine icon for block/ set block as disabled/opened if false is passedpublic void setMineIcon(boolean enabled)this.setText(M);if (!enabled)this.setBackgroundResource(R.drawable.square_grey);this.setTextColor(Color.RED);elsethis.setTextColor(Color.BLACK);/ set mine as flagged/ set block as disabled/opened if false is passedpublic void setFlagIcon(boolean enabled)this.setText(F);if (!enabled)this.setBackgroundResource(R.drawable.square_grey);this.setTextColor(Color.RED);elsethis.setTextColor(Color.BLACK);/ set mine as question mark/ set block as disable