Android Learning image compression, high compression and low distortion

In the past to do the mobile phone upload pictures, direct access to the camera to capture the original image upload, the original size is generally 1~2m, so upload a waste of resources, some scenes also need to upload more than one picture, so recently looked at a lot of predecessors written about the image processing, and then try to change a picture compression method. The test is also good, the compression effect is ideal, mainly distortion is not obvious. Share it here.

Directly below the code:

/** * Upload the server when the image is called the following method compressed after saving to the temporary folder image compressed less than 200KB, distortion is not obvious * * @param path * @return * @throws ioexception */public static Bit Map Revitionimagesize (String path) throws IOException {Bufferedinputstream in = new Bufferedinputstream (new FileInputStream (new File)); Bitmapfactory.options Options = new Bitmapfactory.options (); options.injustdecodebounds = true; Bitmapfactory.decodestream (in, null, options); In.close (); int i = 0; Bitmap Bitmap = null;//Options.injustdecodebounds=true then will not return the actual Bitmap object, do not allocate memory space but can get some decoding boundary information, such as picture size information// Outheight (image original height) and outwidth (original width of the picture)//insamplesize represents a fraction of the size of the original picture//Options.outwidth >> I (right shift operator)  Represents: outwidth/(2^i) while (true) {if ((options.outwidth >> i <=) && (options.outheight >> i <= ) {in = new Bufferedinputstream (new FileInputStream (path)), options.insamplesize = (int) Math.pow (2.0D, i) ; The power operation I is several square options.injustdecodebounds = False;bitmap = Bitmapfactory.decodestream (in, null, options); i + = 1;} REturn bitmap;} 

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Android Learning image compression, high compression and low distortion