CODEWITHSUNDEEP
androidmemoryserializationpathparcelable
Schadenfreude
Schadenfreude

Reputation: 1950

Can android.graphics.Path be made Parcelable?

I've found a few topics about making Path a Serializable object but I couldn't find anything about making it Parcelable. From what I've read, Parcelable objects are more efficient for packing and unpacking in a Bundle.

I've made a new object called ParcelablePath, which extends 'Path' and implements Parcelable and have overridden the required methods, but I'm not really sure what to do in the overridden methods.

My question is, is it even possible to make Path a Parcelable object? If so how can I do it?

Here is some sample code:

public class ParcelablePath extends Path implements Parcelable {
    protected ParcelablePath(Parcel in) {
    }

    public static final Creator<ParcelablePath> CREATOR = new Creator<ParcelablePath>() {
        @Override
        public ParcelablePath createFromParcel(Parcel in) {
            return new ParcelablePath(in);
        }

        @Override
        public ParcelablePath[] newArray(int size) {
            return new ParcelablePath[size];
        }
    };

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

    }
}

Upvotes: 4

Views: 926

Answers (2)

Eugen Pechanec
Eugen Pechanec

Reputation: 38243

If you need to build a path consisting only of straight lines and marshal it to another process, you can use Gesture.

Gesture implements Parcelable so can be sent accross process boundaries in a Parcel and provides a toPath method to construct a Path at the other end.

// build path
val points = ArrayList<GesturePoint>()
points += GesturePoint(x = 0f, y = 0f, timestamp = 0L)
// make parcelable
val stroke = GestureStroke(points)
val gesture = Gesture().apply { addStroke(stroke) }
// send away

You could make this an implementation detail of your ParcelablePath which would no longer extend Path and only expose toPath and a limited subset of the Path API.

Upvotes: 1

sliminem
sliminem

Reputation: 7

If you are using Android Studio there's a nice plugin which will solve your issue and automate the process for making a class Parcelable.

You can have a look here: Quickly Create Parcelable Class in Android Studio Android Tutorials Mobile Development

Upvotes: -2

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