有效地调整位图的大小，而又不损失android的质量

Question

I want to reduce the size of an image on disk without losing quality. I don't want to change the width and height of original image.

I want to do something like https://tinyjpg.com/

It reduces the size of image without changing the width and height of image.

Answer 1

You need to compress with jpeg, if you want to reduce size without change measurements. Try this;

String file = ...
OutputStream s = new FileOutputStream(file);
BitmapFactory.decodeFile(file).compress(CompressFormat.JPEG, 80, s);
s.close();

80 is compression factor which between 0-100 (0 lowest quality, 100 highest quality). Try to find best for your situation.