Android real time graph adjustments user touch screen

Is there any existing graphing library for android that will allow me to draw a line with an adjustable amount of segments that can be touched and dragged in real time? I currently have a working application using androidplot that captures an image of what I'm scanning and graphs that data. I need adjustable line segment under the graph so the user can choose the area that will be integrated between the curves collected from the data and the adjustable line.

I was unable to find anythi开发者_如何学Cng in androidplot that might allow me to do this, I'm fine with switching graphing libraries if that is what is needed.

Try looking into Path. That is probably the easiest class to use.

class Graph extends View {
    Graph(Context context) {
        super(context);
        // ... Init paints
    }

    @Override public void onDraw(Canvas canvas) {
        canvas.save(MATRIX_SAVE_FLAG);

        // Draw Y-axis
        canvas.drawLine(axisOffset, axisOffset, axisOffset, canvasHeight-axisOffset, paint);
        // Draw X-axis
        canvas.drawLine(axisOffset, canvasHeight-axisOffset, canvasWidth-axisOffset, canvasHeight-axisOffset, paint);
        canvas.drawPath(new RectF(0.0f, 0.0f, 1.0f, 1.0f), mPath, paint);
        canvas.restore();
    }

    Path mPath = new Path(); // your open path
    float canvasWidth = 1.0f;
    float canvasHeight= 1.0f;
    float axisOffset = 0.1f; // The offset from the border of the canvas

    public void registerDataPlot(int xCoord, int yCoord) {
        // You need to convert the plot data to a location on the canvas
        // Just find the percent value from the base of the axis
        float x = xCoord / (canvasWidth - (2*axisOffset));
        float y = yCoord / (canvasHeight - (2*axisOffset));
        mPath.lineTo(x, y);
    }