本文實(shí)例為大家分享了Android實(shí)現(xiàn)電影院選座效果展示的具體代碼，供大家參考，具體內(nèi)容如下
這是一個簡單的電影院選座效果，實(shí)現(xiàn)該效果大致分為三步：
1.自定義view進(jìn)行繪制；
2.手勢縮放效果的實(shí)現(xiàn)；
3.手勢觸摸被選和未被選效果的實(shí)現(xiàn)；
先來看第一步，效果的繪制；
public class MoveSeatView extends View { private final boolean DBG = false; private Paint paint = new Paint(); private Matrix matrix = new Matrix(); private Matrix tempMatrix = new Matrix(); //座位水平間距 private int spacing; //座位垂直間距 private int verSpacing; //行號寬度 private int numberWidth; //行數(shù) private int row; //列數(shù) private int column; //可選座位的圖片 private Bitmap seatBitmap; //選中時座位的圖片 private Bitmap checkedSeatBitmap; private int lastX; private int lastY; //整個座位圖的寬度 private int seatBitmapWidth; private int seatBitmapHeight; private float screenHeight; //屏幕的最小寬度 private int defaultScreenWidth; //標(biāo)識是否正在縮放 private boolean isScaling; private float scaleX, scaleY; //是否是第一次縮放 private boolean firstScale = true; private boolean isOnClick; private int downX, downY; private boolean pointer; //用于存儲已經(jīng)選在好的座位 public ArrayList<Point> list; /** * 默認(rèn)的座位圖片的寬度，如果使用的自己的座位的圖片比這個尺寸大或者小，會縮放到這個大小 */ private float defaultImgW = 40; private float defaultImgH = 34; /** * 座位圖片的寬度 */ private int seatWidth = 40; /** * 座位圖片的高度 */ private int seatHeight = 34; private float zoom; float xScalel = 1; float yScalel = 1; public MoveSeatView(Context context) { this(context, null); } public MoveSeatView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public MoveSeatView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } private void init() { spacing = (int) dip2px(5); verSpacing = (int) dip2px(10); defaultScreenWidth = (int) dip2px(80); seatBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seat_default); xScalel = defaultImgW / seatBitmap.getWidth(); yScalel = defaultImgH / seatBitmap.getHeight(); checkedSeatBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seat_green); seatBitmapWidth = (int) (column * seatBitmap.getWidth() * xScalel + (column - 1) * spacing); seatBitmapHeight = (int) (row * seatBitmap.getHeight() * yScalel + (row - 1) * verSpacing); paint.setColor(Color.RED); numberWidth = (int) dip2px(20); screenHeight = dip2px(20); list = new ArrayList<>(); matrix.postTranslate(numberWidth + spacing, screenHeight + 1 + verSpacing); }}上面這些都是一些初始化動作，接下來在onDraw方法中進(jìn)行繪制；
@Override protected void onDraw(Canvas canvas) { if (row <= 0 || column <= 0) { return; } drawSeat(canvas); super.onDraw(canvas); }具體的繪制邏輯實(shí)在drawSeat(),方法中實(shí)現(xiàn)的；
/** * 繪制 * * @param canvas */ private void drawSeat(Canvas canvas) { zoom = getMatrixScaleX(); float translateX = getTranslateX(); float translateY = getTranslateY(); float scaleX = zoom; float scaleY = zoom; for (int i = 0; i < row; i++) { float top = i * seatBitmap.getHeight() * yScalel * scaleY + i * verSpacing * scaleY + translateY; float bottom = top + seatBitmap.getHeight() * yScalel * scaleY; for (int j = 0; j < column; j++) { float left = j * seatBitmap.getWidth() * xScalel * scaleX + j * spacing * xScalel * scaleX + translateX; float right = left + seatBitmap.getWidth() * xScalel * scaleX; tempMatrix.setTranslate(left, top); tempMatrix.postScale(xScalel, yScalel, left, top); tempMatrix.postScale(scaleX, scaleY, left, top); if (isHave(i, j)) { //繪制被選 canvas.drawBitmap(checkedSeatBitmap, tempMatrix, paint); //繪制文字 drawText(canvas, i, j, top, left); } else { //繪制普通 canvas.drawBitmap(seatBitmap, tempMatrix, paint); } } } }主要是計(jì)算繪制的位置，矩陣的縮放，根據(jù)是否被選進(jìn)行繪制不同的效果；
/** * 繪制文字 * * @param canvas * @param row * @param column * @param top * @param left */ private void drawText(Canvas canvas, int row, int column, float top, float left) { String txt = (row + 1) + "排"; String txt1 = (column + 1) + "座"; //實(shí)例化文字畫筆 TextPaint txtPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG); txtPaint.setColor(Color.WHITE); //設(shè)置字體樣式 txtPaint.setTypeface(Typeface.DEFAULT_BOLD); float seatHeight = this.seatHeight * getMatrixScaleX(); float seatWidth = this.seatWidth * getMatrixScaleX(); txtPaint.setTextSize(seatHeight / 3); //獲取中間線 float center = seatHeight / 2; float txtWidth = txtPaint.measureText(txt); float startX = left + seatWidth / 2 - txtWidth / 2; //只繪制一行文字 if (txt1 == null) { canvas.drawText(txt, startX, getBaseLine(txtPaint, top, top + seatHeight), txtPaint); } else { canvas.drawText(txt, startX, getBaseLine(txtPaint, top, top + center), txtPaint); canvas.drawText(txt1, startX, getBaseLine(txtPaint, top + center, top + center + seatHeight / 2), txtPaint); } if (DBG) { Log.d("drawTest", "top" + top); } }這里是使用TextPaint畫筆進(jìn)行文字的繪制，在繪制文字的時候要注意基準(zhǔn)線；
/** * 獲取基準(zhǔn)線 * @param p * @param top * @param bottom * @return */ private float getBaseLine(Paint p, float top, float bottom) { Paint.FontMetrics fontMetrics = p.getFontMetrics(); int baseLine = (int) ((bottom + top - fontMetrics.bottom - fontMetrics.top) / 2); return baseLine; }這樣大致的繪制做完成了，剩下的第二步和第三步都涉及到手勢觸摸，在onTouchEvent方法中去實(shí)現(xiàn)具體的邏輯；
@Override public boolean onTouchEvent(MotionEvent event) { int x = (int) event.getX(); int y = (int) event.getY(); //手勢縮放 scaleGuestureDetector.onTouchEvent(event); //手勢 gestureDetector.onTouchEvent(event); //獲取當(dāng)前操作的手指數(shù)量 int pointerCount = event.getPointerCount(); if (pointerCount > 1) { //多手指操作 pointer = true; } switch (event.getAction()) { case MotionEvent.ACTION_DOWN: pointer = false; downX = x; downY = y; invalidate(); break; case MotionEvent.ACTION_UP: autoScale(); break; case MotionEvent.ACTION_MOVE: if (!isScaling && !isOnClick) { int downDX = Math.abs(x - downX); int downDY = Math.abs(y - downY); if ((downDX > 10 || downDY > 10) && !pointer) { int dx = x - lastX; int dy = y - lastY; matrix.postTranslate(dx, dy); invalidate(); } } lastX = x; lastY = y; isOnClick = false; break; } return true; }剛觸摸去選擇的時候會有個手勢縮放的效果，手勢縮放系統(tǒng)提供了ScaleGestureDetector類可以很容易的實(shí)現(xiàn)，具體的邏輯系統(tǒng)都已經(jīng)處理好了，在對應(yīng)的回調(diào)方法里面去實(shí)現(xiàn)就可以了；
/** * 手勢縮放 */ ScaleGestureDetector scaleGuestureDetector = new ScaleGestureDetector(getContext(), new ScaleGestureDetector.OnScaleGestureListener() { @Override public boolean onScale(ScaleGestureDetector detector) { //正在縮放的時候回調(diào) isScaling = true; float scaleFactor = detector.getScaleFactor(); if (getMatrixScaleY() * scaleFactor > 3) { scaleFactor = 3 / getMatrixScaleY(); } if (firstScale) { scaleX = detector.getCurrentSpanX(); scaleY = detector.getCurrentSpanY(); firstScale = false; } if (getMatrixScaleY() * scaleFactor < 0.5) { scaleFactor = 0.5f * getMatrixScaleY(); } matrix.postScale(scaleFactor, scaleFactor, scaleX, scaleY); invalidate(); return true; } @Override public boolean onScaleBegin(ScaleGestureDetector detector) { //開始縮放的時候回調(diào) return false; } @Override public void onScaleEnd(ScaleGestureDetector detector) { //縮放完成回調(diào) isScaling = false; firstScale = true; } });其他的手勢操作系統(tǒng)還提供了GestureDetector類，可以使用GestureDetector來實(shí)現(xiàn)具體的效果；
GestureDetector gestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { @Override public boolean onSingleTapConfirmed(MotionEvent e) { int x = (int) e.getX(); int y = (int) e.getY(); for (int i = 0; i < row; i++) { for (int j = 0; j < column; j++) { int tempX = (int) ((j * seatWidth + j * spacing) * getMatrixScaleX() + getTranslateX()); int maxTempX = (int) (tempX + seatWidth * getMatrixScaleX()); int tempY = (int) ((seatHeight * i + i * verSpacing) * getMatrixScaleY() + getTranslateY()); int maxTempY = (int) (tempY + seatHeight * getMatrixScaleY()); if (x >= tempX && x <= maxTempX && y >= tempY && y <= maxTempY) { if (isHave(i, j)) { remove(i, j); } else { list.add(new Point(i, j)); } } } } float currentScaleY = getMatrixScaleY(); if (currentScaleY < 1.7) { scaleX = x; scaleY = y; zoomAnimate(currentScaleY, 1.9f); } invalidate(); return true; } });完成上面三步，效果也就大致實(shí)現(xiàn)了，提供外部設(shè)置的方法供調(diào)用就可以了；
/** * 對外界提供的設(shè)置方法 * @param row * @param column */ public void setData(int row, int column) { this.row = row; this.column = column; init(); invalidate(); }源碼地址：Android實(shí)現(xiàn)電影院選座效果
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