How to make Bitmap compress without change the bitmap size

Question

I use this method to compress an image   if bitmapObject compress Bitmap CompressFormat PNG  100  fOut                  But the image I get is much smaller   in the dimension   that was before the compress action    My application need to send the compressed image thru the network - so i want to send as less data as I can     but I must to keep the original size of the image    Is there some other way to keep the original bitmap dimension with some compress

User · Answer

Here s a short means I used to reduce the size of Images that have a high byteCount  basically pixels  fun resizeImage image  Bitmap   Bitmap        val width   image width     val height   image height      val scaleWidth   width   10     val scaleHeight   height   10      if  image byteCount  lt   1000000          return image      return Bitmap createScaledBitmap image  scaleWidth  scaleHeight  false     This returns a scaled Bitmap that is over 10 times smaller than the Bitmap passed as a parameter  Might not be the most ideal solution but it works

User · Answer

If you are using PNG format then it will not compress your image because PNG is a lossless format  use JPEG  for compressing your image and use 0 instead of 100 in quality   Quality Accepts 0 - 100  0   MAX Compression  Least Quality which is suitable for Small images   100   Least Compression  MAX Quality which is suitable for Big images

User · Answer

I have done this way   Get Compressed Bitmap from Singleton class   ImageView imageView    ImageView findViewById R id imageView   Bitmap bitmap   ImageUtils getInstant   getCompressedBitmap  Your Image Path Here    imageView setImageBitmap bitmap     ImageUtils java    public class ImageUtils        public static ImageUtils mInstant       public static ImageUtils getInstant            if mInstant  null               mInstant   new ImageUtils                      return mInstant             public  Bitmap getCompressedBitmap String imagePath            float maxHeight   1920 0f          float maxWidth   1080 0f          Bitmap scaledBitmap   null          BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          Bitmap bmp   BitmapFactory decodeFile imagePath  options            int actualHeight   options outHeight          int actualWidth   options outWidth          float imgRatio    float  actualWidth    float  actualHeight          float maxRatio   maxWidth   maxHeight           if  actualHeight  gt  maxHeight    actualWidth  gt  maxWidth                if  imgRatio  lt  maxRatio                    imgRatio   maxHeight   actualHeight                  actualWidth    int   imgRatio   actualWidth                   actualHeight    int  maxHeight                else if  imgRatio  gt  maxRatio                    imgRatio   maxWidth   actualWidth                  actualHeight    int   imgRatio   actualHeight                   actualWidth    int  maxWidth                else                   actualHeight    int  maxHeight                  actualWidth    int  maxWidth                                    options inSampleSize   calculateInSampleSize options  actualWidth  actualHeight           options inJustDecodeBounds   false          options inDither   false          options inPurgeable   true          options inInputShareable   true          options inTempStorage   new byte 16   1024            try               bmp   BitmapFactory decodeFile imagePath  options             catch  OutOfMemoryError exception                exception printStackTrace                       try               scaledBitmap   Bitmap createBitmap actualWidth  actualHeight  Bitmap Config ARGB 8888             catch  OutOfMemoryError exception                exception printStackTrace                       float ratioX   actualWidth    float  options outWidth          float ratioY   actualHeight    float  options outHeight          float middleX   actualWidth   2 0f          float middleY   actualHeight   2 0f           Matrix scaleMatrix   new Matrix            scaleMatrix setScale ratioX  ratioY  middleX  middleY            Canvas canvas   new Canvas scaledBitmap           canvas setMatrix scaleMatrix           canvas drawBitmap bmp  middleX - bmp getWidth     2  middleY - bmp getHeight     2  new Paint Paint FILTER BITMAP FLAG             ExifInterface exif   null          try               exif   new ExifInterface imagePath               int orientation   exif getAttributeInt ExifInterface TAG ORIENTATION  0               Matrix matrix   new Matrix                if  orientation    6                    matrix postRotate 90                 else if  orientation    3                    matrix postRotate 180                 else if  orientation    8                    matrix postRotate 270                             scaledBitmap   Bitmap createBitmap scaledBitmap  0  0  scaledBitmap getWidth    scaledBitmap getHeight    matrix  true             catch  IOException e                e printStackTrace                      ByteArrayOutputStream out   new ByteArrayOutputStream            scaledBitmap compress Bitmap CompressFormat JPEG  85  out            byte   byteArray   out toByteArray             Bitmap updatedBitmap   BitmapFactory decodeByteArray byteArray  0  byteArray length            return updatedBitmap             private int calculateInSampleSize BitmapFactory Options options  int reqWidth  int reqHeight            final int height   options outHeight          final int width   options outWidth          int inSampleSize   1           if  height  gt  reqHeight    width  gt  reqWidth                final int heightRatio   Math round  float  height    float  reqHeight               final int widthRatio   Math round  float  width    float  reqWidth               inSampleSize   heightRatio  lt  widthRatio   heightRatio   widthRatio                    final float totalPixels   width   height          final float totalReqPixelsCap   reqWidth   reqHeight   2           while  totalPixels    inSampleSize   inSampleSize   gt  totalReqPixelsCap                inSampleSize                      return inSampleSize            Dimensions are same after compressing Bitmap   How did I checked    Bitmap beforeBitmap   BitmapFactory decodeFile  Your Image Path Here    Log i  Before Compress Dimension   beforeBitmap getWidth    -  beforeBitmap getHeight      Bitmap afterBitmap   ImageUtils getInstant   getCompressedBitmap  Your Image Path Here    Log i  After Compress Dimension   afterBitmap getWidth      -    afterBitmap getHeight       Output   Before  Compress     Dimension  1080-1452 After  Compress     Dimension  1080-1452   Hope this will help you

User · Answer

i think you use this method to compress the bitmap  BitmapFactory Option imageOpts   new BitmapFactory Options     imageOpts inSampleSize   2       for 1 2 the image to be loaded Bitmap thumb   Bitmap createScaledBitmap  BitmapFactory decodeFile photoPath  imageOpts   96  96  false

User · Answer

Are you sure it is smaller   Bitmap original   BitmapFactory decodeStream getAssets   open  1024x768 jpg     ByteArrayOutputStream out   new ByteArrayOutputStream    original compress Bitmap CompressFormat PNG  100  out   Bitmap decoded   BitmapFactory decodeStream new ByteArrayInputStream out toByteArray       Log e  Original   dimensions   original getWidth       original getHeight     Log e  Compressed dimensions   decoded getWidth       decoded getHeight       Gives   12-07 17 43 36 333  E Original   dimensions 278   1024 768 12-07 17 43 36 333  E Compressed dimensions 278   1024 768   Maybe you get your bitmap from a resource  in which case the bitmap dimension will depend on the phone screen density  Bitmap bitmap   BitmapDrawable getResources   getDrawable R drawable img 1024x768   getBitmap    Log e  Dimensions   bitmap getWidth       bitmap getHeight      12-07 17 43 38 733  E Dimensions 278   768 576

[android] How to make Bitmap compress without change the bitmap size?

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