Android: Creating a high quality thumbnail image

Question

I have some difficulties creating a high quality thumbnail for my captured images. I understand that there are many snippet codes and tutorials in the web to create a thumbnail. I tried them and my problem is I can't produce a high quality thumbnail image. The output is always pixelated. Any suggestion ,library or links guys? thanks in advance.

I tried this one but its low quality also.

 public static Bitmap scaleBitmap(Bitmap bitmap, int wantedWidth, int wantedHeight) {
        Bitmap output = Bitmap.createBitmap(wantedWidth, wantedHeight, Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        Matrix m = new Matrix();

        m.setScale((float) wantedWidth / bitmap.getWidth(), (float) wantedHeight / bitmap.getHeight());

        canvas.drawBitmap(bitmap, m, new Paint());

        return output;
    }

Which language version and which platform are you developing on? Are you developing web application that serves content to an android browser? — Benedikt, Dec 10 '13 at 08:05
Im using java in android. I have this native android application with a custom camera and I want to create a thumbnail of my captured image. — Erick, Dec 10 '13 at 08:11
Show us some code of what you tried. I could define nice thumbnails using only android apis. — Snicolas, Dec 10 '13 at 08:19
You should have a look at this : http://developer.android.com/training/displaying-bitmaps/load-bitmap.html. And this http://stackoverflow.com/a/19486896/693752 — Snicolas, Dec 10 '13 at 12:18

score 0 · Answer 1 · answered Aug 25 '16 at 11:34

Use RapidDecoder library. It is simple as follow:

import rapid.decoder.BitmapDecoder;
...
Bitmap bitmap = BitmapDecoder.from(getResources(), R.drawable.image)
                             .scale(width, height)
                             .useBuiltInDecoder(true)
                             .decode();

Don't forget to use builtin decoders if you want to scale down less than 50% and a HQ result.

score -1 · Answer 2 · answered Dec 10 '13 at 09:36

-1

Did you try this,

Bitmap src = Thumbnails.getThumbnail(getContentResolver(), ContentUris.parseId(sourceUri), Thumbnails.MINI_KIND, options);

answered Dec 10 '13 at 09:36

Shashika

1,151
1
9
21

score -2 · Answer 3 · answered Oct 02 '14 at 05:26

-2

Try this

Bitmap ThumbImage =ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(imagePath),THUMBSIZE, THUMBSIZE);

This Utility is available from API_LEVEl 8. [Source]

answered Oct 02 '14 at 05:26

Vipul Divyanshu

196
2
6

Android: Creating a high quality thumbnail image

3 Answers3