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I’m loading a 489KB bitmap using the BitmapFactory.decodeFile.
and I check how much memory my program takes after loading it and I see it adds ~5000KB
why is that, and what should I do to avoid it?
Your bitmap is file is most likely compressed (PNG/JPG).
You can’t expect that loaded bitmap will be still compressed in memory.
Each decompressed pixel in memory takes usually 4 bytes.