如何像Facebook和WhatApp做优化图像？ [英] how to optimize image like Facebook and WhatApp does?

问题描述

我想优化像WhatsApp的和Facebook的图片文件的大小都在做。我有送5MB图片上的WhatsApp，而接收到的图像具有80KB的大小。接收到的图像看起来与原有的但分辨率小于原来的

I want to optimize the Image file size like whatsapp and facebook are doing. I have send 5MB Image on whatsapp, And received image has size of 80KB. Received image looks identical to the original ones but resolution is less than the original one.

我几乎尝试了所有的源$ C ​​$ CS的机器人形象融为一体$ P $适用于计算器pssion但是，这并不为我工作。然后，我遇到了此链接优化形象，这是做好工作，但仍没有得到结果类似WhatsApp的。

I tried almost all the source codes of android image compression available on stackoverflow but that doesn't work for me. And then i came across this link to optimize the image, which is doing good work but still not getting the result like whatsapp.

我怎样才能实现最大图像融为一体pression不降低图像的质量，同样喜欢WhatsApp的那样？

How can i achieve maximum image compression without degrading the quality of image, Same like whatsapp did?

答与源$ C ​​$ C将是非常有益的。

Answer with a source code will be very helpful.

在此先感谢。

推荐答案

您需要取消code图像（位图）

You need to decode Image (bitmap)

下面是code。

public Bitmap  decodeFile(String path) {
        // Decode image size
        int orientation;
        try {
            if (path == null) {
                return null ;
            }
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            // Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE = 70;
            int width_tmp = o.outWidth, height_tmp = o.outHeight;
            int scale = 0;
            while (true) {
                if (width_tmp / 2 < REQUIRED_SIZE
                        || height_tmp / 2 < REQUIRED_SIZE)
                    break;
                width_tmp /= 2;
                height_tmp /= 2;
                scale++;
            }
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            Bitmap bm = BitmapFactory.decodeFile(path, o2);
            Bitmap bitmap = bm;
            ExifInterface exif = new ExifInterface(path);
            orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);

            Log.e("orientation", "" + orientation);
            bitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),bm.getHeight(), null, true);
            ImageViewChooseImage.setImageBitmap(bitmap);
            bitmapfinal = bitmap;
            return bitmap ;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }

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