Lower uri image quality to reduce file size

Question

I have a high resolution image Uri and I would like to reduce the image quality and size since i'm uploading it to a server and then load it afterwards as a smaller version of the original image.

I tried this:

Picasso.with(context).load(image).resize(100,100).get();

But it didn't work cause you need to do this from a separate Thread and I didn't find a listener that tells you when the resizing is over.

Does anyone has a solution that can reduce the image quality to get a smaller file size?

score 2 · Answer 1 · edited May 23 '17 at 12:09

2

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 50;
Bitmap bmpSample = BitmapFactory.decodeFile(fileUri.getPath(), options);

ByteArrayOutputStream out = new ByteArrayOutputStream();                
bmpSample.compress(Bitmap.CompressFormat.JPEG, 1, out);
byte[] byteArray = out.toByteArray();
return convertToUri(byteArray);

Thank you Android: Compress Bitmap from Uri

edited May 23 '17 at 12:09

Community

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answered Dec 25 '16 at 17:19

ben

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How do you convert byteArray to Uri in convertToUri? – Touré Holder Nov 09 '17 at 08:11

score 1 · Answer 2 · answered Dec 24 '16 at 19:13

Step #1: Call openInputStream() on a ContentResolver, passing in your Uri.

Step #2: Create a BitmapFactory.Options object, with an inSampleSize to control the degree of downsampling that you want to do, to create a lower-resolution Bitmap.

Step #3: Pass the stream and the BitmapFactory.Options object to decodeStream() on BitmapFactory, to get a downsampled Bitmap.

Step #4: Upload that Bitmap, where the details will vary a bit by whatever API you are using to do the upload (byte[], File, etc.).

Step #5: Do steps #1-4 on a background thread, as you should not be doing disk I/O, bitmap downsampling, and network operations on the main application thread.

Lower uri image quality to reduce file size

2 Answers2