Question

How can I add touch capabilities to a simple bitmap?

I’ve tried to create a wrapper class for a bitmap,
which implemented OnGestureListener,
but it didn’t work.

I want to avoid extending View class to achieve this.

Thanks!

Answer 1

A Bitmap per se is just a representation of an image… thus, in order to show it you will have to draw it somewhere (a View, in fact you always draw it on a View). Then, there’s no way to avoid using the View class since all user interface widgets extend it.

In conclusion, if you want to simply set touch listeners to a single Bitmap you can, for instance, draw it on a ImageView and set the appropriate listeners. On the other hand, if you have a set of bitmaps drawn somewhere (for instance, on a SurfaceView), you should locate the bitmap by its coordinates (in that case, the View which would receive the events will be the SurfaceView).