How to clean up a bitmap?

Question

I'm creating a new empty transparent Bitmap and making some modifications to it.

Is there a way to clean up this (make transparent and empty again) without creating new instance of Bitmap ?

UPDATE: Thanks for your help. I have found answer.

// Fills the bitmap's pixels with the specified Color. 
bitmap.eraseColor(somecolor);

Answer 1

Try this:

myBitmap.eraseColor(android.graphics.Color.TRANSPARENT);

The constant int value of TRANSPARENT is 0x00000000.

Answer 2

Your Bitmap must be a mutable Bitmap.

when your bitmap like this

Bitmap bitmap=.......

then convert it into mutable bitmap by using below

Bitmap mutableBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);

then mutableBitmap.eraseColor(somecolor);