Android实现九宫格图案解锁

private static final int POINT_SIZE = 5;private Point[][] points = new Point[3][3];private boolean isInit,isSelect,isFinish,movePoint;private Matrix matrix = new Matrix();private float width,height,offstartX,offstartY,moveX,moveY;;private Bitmap bitmap_pressed,bitmap_normal,bitmap_error,bitmap_line,bitmap_line_error;private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);private List pointList = new ArrayList();private OnPatterChangeLister onPatterChangeLister;public LockPatterView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}

public LockPatterView(Context context, AttributeSet attrs) {super(context, attrs);}

public LockPatterView(Context context) {super(context);}

@Override protected void onDraw(Canvas canvas) {if (!isInit) {initPoints();}points2Canvas(canvas);

if (pointList.size() > 0) {Point a = pointList.get(0);for (int i = 0; i < pointList.size(); i++) {Point b = pointList.get(i);line2Canvas(canvas, a, b);a = b;}if (movePoint) {line2Canvas(canvas, a, new Point(moveX, moveY));}}}

/*** @param canvas*/ private void points2Canvas(Canvas canvas) {for (int i = 0; i < points.length; i++) {for (int j = 0; j < points[i].length; j++) {Point point = points[i][j];if (point.state == Point.STATE_PRESSED) {canvas.drawBitmap(bitmap_pressed, point.x - bitmap_normal.getWidth()/2, point.y - bitmap_normal.getHeight() / 2, paint);}else if (point.state == Point.STATE_ERROR) {canvas.drawBitmap(bitmap_error, point.x - bitmap_normal.getWidth()/2, point.y - bitmap_normal.getHeight() / 2, paint);}else{canvas.drawBitmap(bitmap_normal, point.x - bitmap_normal.getWidth()/2, point.y - bitmap_normal.getHeight() / 2, paint);}}}}

/**** @param canvas* @param* @param*/ public void line2Canvas(Canvas canvas,Point a,Point b){float linelength = (float) Point.distance(a, b);float degress = getDegrees(a,b);canvas.rotate(degress, a.x, a.y);

if (a.state == Point.STATE_PRESSED) {matrix.setScale(linelength / bitmap_line.getWidth(), 1);matrix.postTranslate(a.x, a.y);canvas.drawBitmap(bitmap_line, matrix, paint);}else{matrix.setScale(linelength / bitmap_line.getWidth(), 1);matrix.postTranslate(a.x, a.y);canvas.drawBitmap(bitmap_line_error, matrix, paint);}canvas.rotate(-degress, a.x, a.y);}

public float getDegrees(Point pointA, Point pointB) {return (float) Math.toDegrees(Math.atan2(pointB.y - pointA.y, pointB.x - pointA.x));}

/***/ private void initPoints() {

width = getWidth();height = getHeight();

if (width > height) {offstartX = (width - height) / 2;width = height;}else{offstartY = (height - width) / 2;height = width;}

bitmap_normal = BitmapFactory.decodeResource(getResources(), R.mipmap.normal);bitmap_pressed = BitmapFactory.decodeResource(getResources(), R.mipmap.press);bitmap_error = BitmapFactory.decodeResource(getResources(), R.mipmap.error);bitmap_line = BitmapFactory.decodeResource(getResources(), R.mipmap.line_normal);bitmap_line_error = BitmapFactory.decodeResource(getResources(), R.mipmap.line_error);

points[0][0] = new Point(offstartX + width / 4,offstartY + height / 4);points[0][1] = new Point(offstartX + width / 2,offstartY + height / 4);points[0][2] = new Point(offstartX + width - width / 4,offstartY + height / 4);

points[1][0] = new Point(offstartX + width / 4,offstartY + width / 2);points[1][1] = new Point(offstartX + width / 2,offstartY + width / 2);points[1][2] = new Point(offstartX + width - width / 4,offstartY + width / 2);

points[2][0] = new Point(offstartX + width / 4,offstartY + width - width / 4);points[2][1] = new Point(offstartX + width / 2,offstartY + width - width / 4);points[2][2] = new Point(offstartX + width - width / 4,offstartY + width - width / 4);

isInit = true;}

@Override public boolean onTouchEvent(MotionEvent event) {moveX = event.getX();moveY = event.getY();movePoint = false;isFinish = false;

Point point = null;

switch (event.getAction()) {case MotionEvent.ACTION_DOWN:if (onPatterChangeLister != null) {onPatterChangeLister.onPatterStart(true);}resetPoint();

point = chechSelectPoint();if (point != null) {isSelect = true;}break;case MotionEvent.ACTION_MOVE:if (isSelect) {point = chechSelectPoint();if (point == null) {movePoint = true;}}break;case MotionEvent.ACTION_UP:isFinish = true;isSelect = false;break;

}if (!isFinish && isSelect && point != null) {if (crossPoint(point)) {movePoint = true;}else{point.state = Point.STATE_PRESSED;pointList.add(point);}}

if (isFinish) {if (pointList.size() == 1) {errorPoint();}else if(pointList.size() < POINT_SIZE && pointList.size() > 0 ){errorPoint();if (onPatterChangeLister != null) {onPatterChangeLister.onPatterChange(null);}}else{if (onPatterChangeLister != null) {String pass = "";for (int i = 0; i < pointList.size(); i++) {pass = pass + pointList.get(i).index;}if (!TextUtils.isEmpty(pass)) {onPatterChangeLister.onPatterChange(pass);}}}}

postInvalidate();return true;}

/*** @param point* @return*/ private boolean crossPoint(Point point){if (pointList.contains(point)) {return true;}else{return false;}}

/***/ public void resetPoint(){for (int i = 0; i < pointList.size(); i++) {Point point = pointList.get(i);point.state = Point.STATE_NORMAL;}pointList.clear();}

/***/ public void errorPoint(){for (Point point : pointList) {point.state = Point.STATE_ERROR;}}

/*** @return*/ private Point chechSelectPoint(){for (int i = 0; i < points.length; i++) {for (int j = 0; j < points[i].length; j++) {Point point = points[i][j];if (Point.with(point.x, point.y, bitmap_normal.getWidth() / 2, moveX, moveY)) {return point;}}}

return null;}

public static class Point{public static int STATE_NORMAL = 0;public static int STATE_PRESSED = 1;public static int STATE_ERROR = 2;public float x,y;public int index = 0,state = 0;public Point(){};

public Point(float x,float y){this.x = x;this.y = y;}

/*** @param a* @param b* @return*/ public static double distance(Point a,Point b){return Math.sqrt(Math.abs(a.x - b.x) * Math.abs(a.x - b.x) + Math.abs(a.y - b.y) * Math.abs(a.y - b.y)) ;}

/**** @param paintX* @param pointY* @param r* @param moveX* @param moveY* @return*/ public static boolean with(float paintX,float pointY,float r,float moveX,float moveY){return Math.sqrt((paintX - moveX) * (paintX - moveX) + (pointY - moveY) * (pointY - moveY)) < r ;}}