删除绘图路径

Question

欢迎你们， 我正在使用以下代码创建绘图应用程序：

public class DrawingPanel extends View implements OnTouchListener {

        private Canvas mCanvas;
        private Path mPath;
        private Paint mPaint, circlePaint, outercirclePaint;

        // private ArrayList<Path> undonePaths = new ArrayList<Path>();
        private float xleft, xright, xtop, xbottom;

        public DrawingPanel(Context context) {
            super(context);
            setFocusable(true);
            setFocusableInTouchMode(true);

            this.setOnTouchListener(this);

            init();

        }

        public void delete() {
            paths.remove(paths.size() - 1);
            invalidate();
        }

        public void init() {
            circlePaint = new Paint();
            mPaint = new Paint();
            outercirclePaint = new Paint();
            outercirclePaint.setAntiAlias(true);
            circlePaint.setAntiAlias(true);
            mPaint.setAntiAlias(true);
            mPaint.setColor(Color.BLACK);
            outercirclePaint.setColor(0x44FFFFFF);
            circlePaint.setColor(0xAADD5522);
            outercirclePaint.setStyle(Paint.Style.STROKE);
            circlePaint.setStyle(Paint.Style.FILL);
            mPaint.setStyle(Paint.Style.STROKE);
            mPaint.setStrokeJoin(Paint.Join.ROUND);
            mPaint.setStrokeCap(Paint.Cap.ROUND);
            mPaint.setStrokeWidth(6);
            outercirclePaint.setStrokeWidth(6);
            mCanvas = new Canvas();
            mPath = new Path();
            paths.add(mPath);

        }

        public void colorChanged(int color) {
            mPaint.setColor(color);
        }

        @Override
        protected void onSizeChanged(int w, int h, int oldw, int oldh) {
            super.onSizeChanged(w, h, oldw, oldh);
        }

        @Override
        protected void onDraw(Canvas canvas) {

            for (Path p : paths) {
                canvas.drawPath(p, mPaint);

            }

        }

        private float mX, mY;
        private static final float TOUCH_TOLERANCE = 0;

        private void touch_start(float x, float y) {
            mPath.reset();
            mPath.moveTo(x, y);
            mX = x;
            mY = y;
        }

        private void touch_move(float x, float y) {
            float dx = Math.abs(x - mX);
            float dy = Math.abs(y - mY);
            if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
                mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
                mX = x;
                mY = y;
            }
        }

        private void touch_up() {
            mPath.lineTo(mX, mY);
            // commit the path to our offscreen
            mCanvas.drawPath(mPath, mPaint);

            RectF rectF = new RectF();

            mPath.computeBounds(rectF, true);
            if(!rectF.isEmpty()){
                Log.d("Here", "Empty");
            }

            regions.add(rectF);

            // kill this so we don't double draw
            mPath = new Path();
            paths.add(mPath);
        }

        @Override
        public boolean onTouch(View arg0, MotionEvent event) {
            float x = event.getX();
            float y = event.getY();

            invalidate();
            if (!isErasing) {
                switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    touch_start(x, y);
                    invalidate();
                    break;
                case MotionEvent.ACTION_MOVE:
                    touch_move(x, y);
                    invalidate();
                    break;
                case MotionEvent.ACTION_UP:
                    touch_up();
                    invalidate();
                    break;
                }
            } else {
                for (int i = 0; i < regions.size(); i++) {
                    if (regions.get(i).contains((int) x, (int) y)) {
                        Log.d("Here", "Here");

                    }
                }
            }

            return true;
        }
    }

现在我可以真正撤消和重做 我希望能够删除和触摸路径（是的，像三星写在屏幕应用程序上的整个路径） 出于这个原因，我尝试了如上所示的RectF并包含但是我可以告诉RectF选择包含路径的矩形（它不仅包含路径的区域，但如果它是弯曲的RectF将包含路径和它周围的区域），我也试过了区域。

我无法在删除模式中获得唯一触及的路径

所以任何建议都将受到赞赏：）