ELS.rar_android

package com.ophone.chapter4_4; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.VelocityTracker; import android.view.View; import android.view.ViewConfiguration; import android.view.WindowManager; public class Screen extends View implements Runnable { // Event ID public static final int EVENT_DOWN = 0; // Guess public static final int CLICK = 10; public static final int UP_LIMIT = 50; private VelocityTracker tracker = null; private int clickX = -1; private int clickY = -1; private int mLeft = 0; private int mTop = 0; private int mBottom = 0; private int duration = 1000; private Thread thread = null; //游戏的状态变量与常量 private int state = 0; public static final int READY = 0; public static final int RUNNING = 1; public static final int FALLING = 2; public static final int PAUSE = -1; // 背景的行数和列数 public static final int COL = 10; public static final int ROW = 24; public static final int BORDER = 5; private Paint paint = new Paint(); private Brick next; private Brick current; private int score; private GameListener listener; private int right; //存储背景的砖块值，0或者1 private int[][] bricks = new int[ROW][COL]; //背景砖块值的副本 private int[][] copy = new int[ROW][COL]; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { int action = msg.what; switch (action) { case EVENT_DOWN: { if (state == RUNNING) down(); break; } default: break; } } }; public Screen(Context context, AttributeSet attrs) { super(context, attrs); } public Screen(Context context) { super(context); reset(); } //初始化游戏数据 private void reset() { //计算方块运行区域的边界 mLeft = 0; mTop = 0; mBottom = mTop + ROW * Brick.WIDTH; right = Brick.WIDTH * COL + mLeft; //初始化下一个方块 next = new Brick(this); next.setShape(Shape.random()); next.left = right + BORDER; next.top = mTop; //初始化当前方块 current = new Brick(this); current.setShape(Shape.random()); current.left = 3 * Brick.WIDTH + mLeft; current.top = mTop; int mt = current.getShape().marginTop(); current.top -= mt * Brick.WIDTH; //初始化方块运行区域的数组 initializeBricks(); state = READY; thread = null; this.score = 0; //设置屏幕背景图片 setBackgroundResource(R.drawable.sea); } private void initializeBricks() { for (int i = 0; i < ROW; i++) { for (int j = 0; j < COL; j++) { bricks[i][j] = 0; } } } public void setGameListener(GameListener listener) { this.listener = listener; } public int getLeftBorder() { return mLeft; } public int getRightBorder() { return right; } public int getTopBorder() { return 0; } public int getBottomBorder() { return mBottom; } public int[][] copyBricks() { for (int i = 0; i < ROW; i++) { for (int j = 0; j < COL; j++) { copy[i][j] = bricks[i][j]; } } return copy; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); paint.setColor(Color.CYAN); int _w = ((WindowManager) getContext().getSystemService( Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth(); paint.setColor(Color.BLACK); //绘制左右游戏区域分割线 canvas.drawLine(right, mTop, right, mTop + getHeight(), paint); if (next != null) { //画下一个砖块 next.draw(canvas); } int color = paint.getColor(); int m_left = next.left; int m_top = next.top + Brick.WIDTH * 6; paint.setColor(Color.parseColor("#FFFFFF")); paint.setTextSize(20); //画得分 canvas.drawText(score + "", m_left, m_top, paint); int s_left = next.left; int s_top = m_top + Brick.WIDTH * 2; //画游戏砖块，暂停，游戏中... canvas.drawText(getStateText(state), s_left, s_top, paint); if (current != null) //画当前的砖块 current.draw(canvas); paint.setColor(color); color = paint.getColor(); //画屏幕上的砖块 for (int i = 0; i < ROW; i++) { for (int j = 0; j < COL; j++) { if (bricks[i][j] == 1) { int r = i; int c = j; int l = c * Brick.WIDTH; int t = r * Brick.WIDTH; paint.setColor(Color.parseColor("#f7faf3")); canvas.drawRect(l, t, l + Brick.WIDTH, t + Brick.WIDTH, paint); paint.setColor(Color.parseColor("#4c8e0b")); canvas.drawRect(l + 1, t + 1, l + Brick.WIDTH - 1, t + Brick.WIDTH - 1, paint); } } } paint.setColor(color); } private String getStateText(int state) { int id = -1; switch (state) { case READY: id = R.string.ready; break; case RUNNING: id = R.string.playing; break; case PAUSE: id = R.string.pause; break; } return getContext().getResources().getString(id); } public void down() { current.moveDown(); invalidate(); } private void remove() { int[] mark = new int[4]; int count = 0; //判断是否有整行都填满砖块的 for (int i = ROW - 1; i >= 0; i--) { int total = 0; for (int j = 0; j < COL; j++) { total += bricks[i][j]; if (total == 10) { mark[count++] = i; } } } if (count > 0) { for (int i = 0; i < count; i++) { //删除整行砖块 removeBricks(mark[i] + i); } //通知监听者删除了count行砖块 if (listener != null) listener.onRemove(count); } //加分 score += count * 10; addScore(score); } private void removeBricks(int row) { for (int i = row; i >= 0; i--) { int p = i - 1; if (p >= 0) { for (int j = 0; j < COL; j++) { bricks[i][j] = bricks[p][j]; } } else { for (int j = 0; j < COL; j++) { bricks[0][j] = 0; } } } } //判断是否游戏结束 private boolean end() { for (int i = 0; i < COL; i++) { if (bricks[0][i] == 1) return true; } return false; } public void onMerge(Brick b) { //将砖块的数组值与背景merge int c = b.left / Brick.WIDTH; int r = b.top / Brick.WIDTH; int[] data = b.getShape().getData(); for (int i = 0; i < data.length; i++) { if (data[i] == 1) { int _r = i / 4; int _c = i % 4; if (r + _r < ROW & c + _c < COL & c + _c >= 0 & r + _r >= 0) bricks[r + _r][c + _c] = 1; } } // end remove(); if (end()) { if (listener != null) { listener.gameOver(score); } reset(); } else { current.setShape(next.getShape()); current.left = 3 * Brick.WIDTH + mLeft; current.top = mTop; int mt = current.getShape().marginTop(); current.top -= mt * Brick.WIDTH; next.setShape(Shape.random()); state = RUNNING; invalidate(); } } @Override public boolean onTouchEvent(MotionEvent event) { if (tracker == null) tracker = VelocityTracker.obtain(); //将event加入到tracker中以便计算 tracker.addMovement(event); int action = event.getAction(); switch (action) { //ACTION_DOWN时记录clickX和clickY的值 case MotionEvent.ACTION_DOWN: clickX = (int) event.getX(); clickY = (int) event.getY(); break; //ACTION_UP，开始计算 case MotionEvent.ACTION_UP: tracker.computeCurrentVelocity(1000); //获得y轴方向的速度 float vy = tracker.getYVelocity(); //获得x轴方向的速度 float vx = tracker.getXVelocity(); //最新的x,y坐标 int x = (int) event.getX(); int y = (int) event.getY(); if (Math.abs(vy) > ViewConfiguration.getMinimumFlingVelocity() & vy < 0 & Math.abs(y - clickY) > UP_LIMIT) { //根据上述条件判断为向上滑动 if (state == READY) { start(); } else { pause(false); } tracker.recycle(); break; } //游戏正在运行中 if (state == RUNNING) {