how to serialize an object of android.graphics.Path

Question

I\'m trying to store objects of Android.graphics.Path in internal device memory. Does anyone know how to serialize a android.graphics.Path object? And also, is there any oth

Answer 1

I've just managed to solve this. My application is based off the FingerPaintDemo, so makes use of just moveTo and quadTo, but I think you can apply this approach to any Path functions.

First, extend Path as follows:

import android.graphics.Path;

import java.util.ArrayList;

import java.io.Serializable;

public class SerializablePath extends Path implements Serializable {

    private ArrayList pathPoints;

    public SerializablePath() {
        super();
        pathPoints = new ArrayList();
    }

    public SerializablePath(SerializablePath p) {
        super(p);
        pathPoints = p.pathPoints;
    }

    public void addPathPoints(float[] points) {
        this.pathPoints.add(points);
    }

    public void loadPathPointsAsQuadTo() {
        float[] initPoints = pathPoints.remove(0);
        this.moveTo(initPoints[0], initPoints[1]);
        for (float[] pointSet : pathPoints) {
            this.quadTo(pointSet[0], pointSet[1], pointSet[2], pointSet[3]);
        } 
    }
}

I don't think I need to paste the implementation code, but if you want to see it let me know. Basically just as you call something like myPath.quadTo(x1, y1, x2, y2), also call myPath.addPathPoints(new float[]{x1, y1, x2, y2}).

Serialize the object to disk as normal, and when you read it back in, just be sure to call myPath.loadPathPointsAsQuadTo().