Android Gallery Thumbnail Images

Question

I am developing an application which loads images from local device storage. I used compression technique code:

FileOutputStream fo = new FileOutputStream(file);
picture.compress(Bitmap.CompressFormat.JPEG, 90, fo);
fo.flush();
fo.close();

where picture is a bitmap. This shows a low quality unreadable image.

Is there any efficient compression technique. Also, how does android gallery show thumbnail images which are readable and of smaller file size?

Have you tried changing `90` by increasing one by one ? – Shree Krishna May 26 '16 at 14:15 — Shree Krishna, May 26 '16 at 14:15
I also did 100. Then also I got a blurred image. – Bhaskar Gurram May 26 '16 at 14:16 — Bhaskar Gurram, May 26 '16 at 14:16

Nisarg · Answer 1 · 2016-05-26T14:28:33.753

1

Hope it will help you

Picasso.with(context)
            .load(imageUri) // will come from gallery
            .resize(imageWidth, imageWidth).centerInside()
            .into(imageview);

I have done this

    public static final int GRID_PADDING = 8; // in dp
    public static final int NUM_OF_COLUMNS  = 3; 
    Resources r = getResources();
        float padding =   TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,GRID_PADDING,r.getDisplayMetrics());
imageWidth = (int) ((getScreenWidth()) - ((NUM_OF_COLUMNS + 1) * padding)) /   NUM_OF_COLUMNS);

edited May 26 '16 at 14:28

answered May 26 '16 at 14:16

Nisarg

1,358
14
30

1

@Bhaskar Gurram you need to do some changes according to your need, for me its working. – Nisarg May 26 '16 at 14:22
Thank you for your answer. I found another hack which looks more efficient. Wrote it below http://stackoverflow.com/a/37463734/4158663 – Bhaskar Gurram May 26 '16 at 14:29
I will try this new method also @nisarg – Bhaskar Gurram May 26 '16 at 14:30
Okay no problem, I'll also try – Nisarg May 26 '16 at 14:32

score 1 · Accepted Answer · answered May 26 '16 at 14:27

1

Solved it using ThumbnailUtils:

   Bitmap picture = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(_path_to_your_file), FINAL_WIDTH, FINAL_HEIGHT);

Image size is reduced much

answered May 26 '16 at 14:27

Bhaskar Gurram

51
2
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Android Gallery Thumbnail Images

2 Answers2