CODEWITHSUNDEEP
androidandroid-canvassurfaceview
Ara Badalyan
Ara Badalyan

Reputation: 1624

Draw multiple canvases in SurfaceView

Can I use two or more canvases to draw in SurfaceView ?

For example 

Canvas canvas1 = holder.lockCanvas;
canvas1.drawPath(path1, paint1);
holder.unlockCanvasAndPost(canvas1);

Canvas canvas2 = holder.lockCanvas;
canvas2.drawPath(path2, paint2);
holder.unlockCanvasAndPost(canvas2);

This code shows incorrect picture.

Upvotes: 0

Views: 784

Answers (1)

fadden
fadden

Reputation: 52353

An Android Canvas is just a way to issue drawing commands. The SurfaceHolder hands you a Canvas that is only valid between the lock() and unlockCanvasAndPost() calls.

You're getting a different Canvas each time you lock the SurfaceHolder. SurfaceView is double- or triple-buffered, so you'll be rotating through a series of buffers as well.

Make sure you're not confusing the Android definition of "Canvas" with its use in other contexts.

Upvotes: 1

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