CODEWITHSUNDEEP
androidbitmapcompression
dd101110
dd101110

Reputation: 11

android inSampleSize of BitmapFactory.Options()

When I tried to compress the size(width & height) of the picture, I have a question about the inSampleSize property of BitmapFactory.Options(). when inSampleSize value is 1, the result is not compressed, when inSampleSize value of 2, image compression half, when inSampleSize value of 3, image compression half also, when inSampleSize value of 4 image compression of 1/4, when inSampleSize value of 6, the compression effect is equivalent to inSampleSize = 4, when inSampleSize is 8, image compression 1/8. so, I come to the preliminary conclusion : does the comopression only take effect when inSampleSize value must be 2^n?

Upvotes: 1

Views: 484

Answers (1)

dauruy
dauruy

Reputation: 329

Yes, from Javadocs in Android source code

Note: the decoder uses a final value based on powers of 2, any other value will be rounded down to the nearest power of 2.

Upvotes: 1

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