General :: Painting Multiline Text On Image

I'm trying to develop a simple application to add a caption into a image, but I have a problem.

The app is simple: I click on a TextView, an AlertDialog pops-up with a EditText, I insert some text, click at "ok" and it sets that text as the textview.

Then comes my problem: I click on a save button and it saves the image with that caption on my sd card. If it's a short text, everything's fine, but on text's that have more than one line it shows everything on only one line. So, if it's a long text, instead of breaking it according to the image's width and continuing into a new line, it just keeps going off the screen.

I'm using canvas.drawText to do it, but it doesn't support line breaks so I'm pretty lost about this.

Is there another way to do this that supports line break? Or a way to break the string into a new line and then use drawText?