CODEWITHSUNDEEP
javaandroidgraphicsbitmap
Flynn
Flynn

Reputation: 6211

Combine Bitmaps?

So I'm really new to the world of graphics and for an app I'm working on I need to convert an 2d array of int values into a 2d image where the int values correspond to a color. For example a value of (1) at spot [0][0] would equate to that square on the image being "Red". I was looking at the Android sample code of Snake, because what they are doing there looks similar to what I want to do, but I have been having trouble figuring out what they are doing. Could you hep me figure out how I can make a class that converts a 2d array of ints into a corresponding 2d image the size of the user's screen?

Thanks

Upvotes: 1

Views: 388

Answers (1)

Tassos Bassoukos
Tassos Bassoukos

Reputation: 16152

There are two ways you could go:

  1. Simply draw into an android.graphics.Bitmap using an android.graphics.Canvas, painting pixels or squares or anything you need into it, then passing the finished bitmap to a View (like an ImageView).

  2. Create an android.graphics.Bitmap with the dimensions you require, then use either #setPixels() or #copyPixelsFromBuffer() to set the required pixels. Note that you have a 2-dimensional array, so you will need to either have it in a 1-d form, or loop on one dimension to processit in 1-d slices.

Edit: Just noticed that the integers correspond to colors - You want to use an indexed mode for the bitmap you created, and give the color maps at creation time.

Upvotes: 1

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