How to compress image size

Question

I want to capture image in low resolution using android camera api but when I captured image it will take default resolution of device camera So I want to capture image in low resolution or small size at time of capture or how can I compress big image into small size in android

User · Answer

You can use this awesome library to compress. Add dependency in app-level gradel:

    dependencies {
    implementation 'id.zelory:compressor:3.0.0'
}

And then just compress the actual image file like this:

val compressedImageFile = Compressor.compress(context, actualImageFile)

User · Answer

use this class to compress image   import android content Context import android graphics Bitmap import android graphics BitmapFactory import android graphics Canvas import android graphics Matrix import android graphics Paint import android net Uri import android os Environment import java io     class ImageFile val uri  Uri  name  String         val filename  String      init           val file   File Environment getExternalStorageDirectory   toString       Documents           if   file exists                  file mkdirs                     val fileNoMedia   File file absolutePath      nomedia           if   fileNoMedia exists                fileNoMedia createNewFile           if  name toLowerCase   endsWith   pdf                  filename   file absolutePath         System currentTimeMillis       pdf            else               filename   file absolutePath         System currentTimeMillis       jpg                        Throws IOException  class      fun copyFileStream context  Context  uri  Uri   String           if  filename endsWith   pdf      filename endsWith   PDF                  var ins  InputStream    null             var os  OutputStream    null             try                   ins   context getContentResolver   openInputStream uri                  os   FileOutputStream filename                  val buffer   ByteArray 1024                  var length  Int   ins read buffer                  while  length  gt  0                        os write buffer  0  length                       length   ins read buffer                                  catch  e  Exception                    e printStackTrace                  finally                   ins  close                   os  close                           else               var ins  InputStream    null             var os  OutputStream    null             try                   ins   context getContentResolver   openInputStream uri                  var scaledBitmap  Bitmap    null                 val options   BitmapFactory Options                   options inJustDecodeBounds   true                 var bmp   BitmapFactory decodeStream ins  null  options                  var actualHeight   options outHeight                 var actualWidth   options outWidth                          max Height and width values of the compressed image is taken as 816x612                 val maxHeight   816 0f                 val maxWidth   612 0f                 var imgRatio    actualWidth   actualHeight  toFloat                   val maxRatio   maxWidth   maxHeight                          width and height values are set maintaining the aspect ratio of the image                 if  actualHeight  gt  maxHeight    actualWidth  gt  maxWidth                        if  imgRatio  lt  maxRatio                            imgRatio   maxHeight   actualHeight                         actualWidth    imgRatio   actualWidth  toInt                           actualHeight   maxHeight toInt                         else if  imgRatio  gt  maxRatio                            imgRatio   maxWidth   actualWidth                         actualHeight    imgRatio   actualHeight  toInt                           actualWidth   maxWidth toInt                         else                           actualHeight   maxHeight toInt                           actualWidth   maxWidth toInt                                                                     setting inSampleSize value allows to load a scaled down version of the original image                 options inSampleSize   calculateInSampleSize options  actualWidth  actualHeight                           inJustDecodeBounds set to false to load the actual bitmap                 options inJustDecodeBounds   false                          this options allow android to claim the bitmap memory if it runs low on memory                 options inPurgeable   true                 options inInputShareable   true                 options inTempStorage   ByteArray 16   1024                    try                                   load the bitmap from its path                     ins close                       ins   context getContentResolver   openInputStream uri                      bmp   BitmapFactory decodeStream ins  null  options                    catch  exception  OutOfMemoryError                        exception printStackTrace                                       try                       scaledBitmap   Bitmap createBitmap actualWidth  actualHeight  Bitmap Config ARGB 8888                    catch  exception  OutOfMemoryError                        exception printStackTrace                                      val ratioX   actualWidth   options outWidth toFloat                   val ratioY   actualHeight   options outHeight toFloat                   val middleX   actualWidth   2 0f                 val middleY   actualHeight   2 0f                  val scaleMatrix   Matrix                   scaleMatrix setScale ratioX  ratioY  middleX  middleY                   val canvas   Canvas scaledBitmap                    canvas matrix   scaleMatrix                 canvas drawBitmap bmp  middleX - bmp width   2  middleY - bmp height   2  Paint Paint FILTER BITMAP FLAG                    os   FileOutputStream filename                  scaledBitmap compress Bitmap CompressFormat JPEG  80  os                  val buffer   ByteArray 1024                  var length  Int   ins read buffer                  while  length  gt  0                        os write buffer  0  length                       length   ins read buffer                                  catch  e  Exception                    e printStackTrace                  finally                   ins  close                   os  close                                   return filename            fun calculateInSampleSize options  BitmapFactory Options  reqWidth  Int  reqHeight  Int   Int           val height   options outHeight         val width   options outWidth         var inSampleSize   1         if  height  gt  reqHeight    width  gt  reqWidth                val heightRatio   Math round height toFloat     reqHeight toFloat                val widthRatio   Math round width toFloat     reqWidth toFloat                inSampleSize   if  heightRatio  lt  widthRatio  heightRatio else widthRatio                   val totalPixels    width   height  toFloat           val totalReqPixelsCap    reqWidth   reqHeight   2  toFloat           while  totalPixels    inSampleSize   inSampleSize   gt  totalReqPixelsCap                inSampleSize                      return inSampleSize           https   lalitjadav007 blogspot in 2017 08 compress-image-in-android html

User · Answer

Just you try this one   byte   data   null      ByteArrayOutputStream baos   new ByteArrayOutputStream        bi compress Bitmap CompressFormat JPEG  100  baos       data   baos toByteArray

User · Answer

Use Compressor  Image compression library   Visit zetbaitsu Compressor for code and documentation   add dependency in gradle  app level  dependencies       implementation  id zelory compressor 3 0 0      To Compress Image use one of these approaches     Compress Image File        val compressedImageFile   Compressor compress context  actualImageFile    Compress Image File to Bitmap        val compressedImageFile   Compressor compress context  actualImageFile        val bitmap   BitmapFactory decodeFile compressedImageFile path

User · Answer

please have look at compressImage method i have used for compressing image   public static String compressImage String imageUri  Activity activity        String filename           try           String filePath   getRealPathFromURI imageUri  activity           Bitmap scaledBitmap   null           BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          Bitmap bmp   BitmapFactory decodeFile filePath  options            int actualHeight   options outHeight          int actualWidth   options outWidth          float maxHeight   816 0f          float maxWidth   612 0f          float imgRatio   actualWidth   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 filePath  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          if  scaledBitmap    null                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          try               exif   new ExifInterface filePath                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                              if  scaledBitmap    null                    scaledBitmap   Bitmap createBitmap scaledBitmap  0  0  scaledBitmap getWidth    scaledBitmap getHeight    matrix  true                           catch  IOException e                e printStackTrace                      FileOutputStream out          filename   getFilename activity           try               out   new FileOutputStream filename               if  scaledBitmap    null                    scaledBitmap compress Bitmap CompressFormat JPEG  80  out                            catch  FileNotFoundException e                e printStackTrace                    catch  Exception e            e printStackTrace               return filename     private static 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     private static String getRealPathFromURI String contentURI  Activity activity        Uri contentUri   Uri parse contentURI       Cursor cursor   activity getContentResolver   query contentUri  null  null  null  null       if  cursor    null            return contentUri getPath          else           cursor moveToFirst            int idx   cursor getColumnIndex MediaStore Images ImageColumns DATA           return cursor getString idx

User · Answer

I think you are asking about Shrinking image size         public Bitmap ShrinkBitmap String file  int width  int height        BitmapFactory Options bmpFactoryOptions   new BitmapFactory Options        bmpFactoryOptions inJustDecodeBounds   true      Bitmap bitmap   BitmapFactory decodeFile file  bmpFactoryOptions        int heightRatio    int  Math ceil bmpFactoryOptions outHeight    float  height       int widthRatio    int  Math ceil bmpFactoryOptions outWidth    float  width        if heightRatio  gt  1    widthRatio  gt  1                if heightRatio  gt  widthRatio                        bmpFactoryOptions inSampleSize   heightRatio                    else                       bmpFactoryOptions inSampleSize   widthRatio                       bmpFactoryOptions inJustDecodeBounds   false      bitmap   BitmapFactory decodeFile file  bmpFactoryOptions       return bitmap

User · Answer

You can try this code      public class ScalingUtilities                   Utility function for decoding an image resource  The decoded bitmap will        be optimized for further scaling to the requested destination dimensions        and scaling logic                 param res The resources object containing the image data         param resId The resource id of the image data         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Decoded bitmap             public static Bitmap decodeResource Resources res  int resId  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Options options   new Options            options inJustDecodeBounds   true          BitmapFactory decodeResource res  resId  options           options inJustDecodeBounds   false          options inSampleSize   calculateSampleSize options outWidth  options outHeight  dstWidth                  dstHeight  scalingLogic           Bitmap unscaledBitmap   BitmapFactory decodeResource res  resId  options            return unscaledBitmap            public static Bitmap decodeFile String path  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Options options   new Options            options inJustDecodeBounds   true          BitmapFactory decodeFile path  options           options inJustDecodeBounds   false          options inSampleSize   calculateSampleSize options outWidth  options outHeight  dstWidth                  dstHeight  scalingLogic           Bitmap unscaledBitmap   BitmapFactory decodeFile path  options            return unscaledBitmap                        Utility function for creating a scaled version of an existing bitmap                param unscaledBitmap Bitmap to scale         param dstWidth Wanted width of destination bitmap         param dstHeight Wanted height of destination bitmap         param scalingLogic Logic to use to avoid image stretching         return New scaled bitmap object             public static Bitmap createScaledBitmap Bitmap unscaledBitmap  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Rect srcRect   calculateSrcRect unscaledBitmap getWidth    unscaledBitmap getHeight                    dstWidth  dstHeight  scalingLogic           Rect dstRect   calculateDstRect unscaledBitmap getWidth    unscaledBitmap getHeight                    dstWidth  dstHeight  scalingLogic           Bitmap scaledBitmap   Bitmap createBitmap dstRect width    dstRect height                    Config ARGB 8888           Canvas canvas   new Canvas scaledBitmap           canvas drawBitmap unscaledBitmap  srcRect  dstRect  new Paint Paint FILTER BITMAP FLAG             return scaledBitmap                        ScalingLogic defines how scaling should be carried out if source and        destination image has different aspect ratio                CROP  Scales the image the minimum amount while making sure that at least        one of the two dimensions fit inside the requested destination area         Parts of the source image will be cropped to realize this                FIT  Scales the image the minimum amount while making sure both        dimensions fit inside the requested destination area  The resulting        destination dimensions might be adjusted to a smaller size than        requested              public static enum ScalingLogic           CROP  FIT                       Calculate optimal down-sampling factor given the dimensions of a source        image  the dimensions of a destination area and a scaling logic                 param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal down scaling sample size for decoding             public static int calculateSampleSize int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic FIT                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return srcWidth   dstWidth                else                   return srcHeight   dstHeight                          else               final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return srcHeight   dstHeight                else                   return srcWidth   dstWidth                                                Calculates source rectangle for scaling bitmap                param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal source rectangle             public static Rect calculateSrcRect int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic CROP                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    final int srcRectWidth    int  srcHeight   dstAspect                   final int srcRectLeft    srcWidth - srcRectWidth    2                  return new Rect srcRectLeft  0  srcRectLeft   srcRectWidth  srcHeight                 else                   final int srcRectHeight    int  srcWidth   dstAspect                   final int scrRectTop    int  srcHeight - srcRectHeight    2                  return new Rect 0  scrRectTop  srcWidth  scrRectTop   srcRectHeight                           else               return new Rect 0  0  srcWidth  srcHeight                                   Calculates destination rectangle for scaling bitmap                param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal destination rectangle             public static Rect calculateDstRect int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic FIT                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return new Rect 0  0  dstWidth   int  dstWidth   srcAspect                  else                   return new Rect 0  0   int  dstHeight   srcAspect   dstHeight                           else               return new Rect 0  0  dstWidth  dstHeight                         public static String decodeFile String path int DESIREDWIDTH  int DESIREDHEIGHT  int type            String strMyImagePath   null          Bitmap scaledBitmap   null          Bitmap rotated   null           try                  Part 1  Decode image             Bitmap unscaledBitmap   ScalingUtilities decodeFile path  DESIREDWIDTH  DESIREDHEIGHT  ScalingLogic FIT                  if    unscaledBitmap getWidth    lt   DESIREDWIDTH  amp  amp  unscaledBitmap getHeight    lt   DESIREDHEIGHT                          Part 2  Scale image                   scaledBitmap   ScalingUtilities createScaledBitmap unscaledBitmap  DESIREDWIDTH  DESIREDHEIGHT  ScalingLogic FIT                   else                     unscaledBitmap recycle                      return path                                  Store to tmp file             scaledBitmap   ScalingUtilities createScaledBitmap unscaledBitmap  DESIREDWIDTH  DESIREDHEIGHT  ScalingLogic FIT                String extr   Environment getExternalStorageDirectory   toString                File mFolder   new File extr   com vt vsmart utils Config SD PATH   image                if   mFolder exists                      mFolder mkdir                               String s   type  temp jpg                File f   new File mFolder getAbsolutePath    s                strMyImagePath   f getAbsolutePath                FileOutputStream fos   null              try                   fos   new FileOutputStream f                     scaledBitmap compress Bitmap CompressFormat JPEG  95  fos                       quay anh 90 do                 Matrix matrix   new Matrix                     matrix postRotate 90                    rotated   Bitmap createBitmap scaledBitmap  0  0  scaledBitmap getWidth    scaledBitmap getHeight    matrix  true                    rotated compress Bitmap CompressFormat JPEG  95  fos                    fos flush                    fos close                  catch  FileNotFoundException e                     e printStackTrace                  catch  Exception e                     e printStackTrace                                 scaledBitmap recycle                rotated recycle              catch  Throwable e                       if  strMyImagePath    null                return path                    return strMyImagePath                 check anh bi quay     public int getCameraPhotoOrientation Context context  Uri imageUri  String imagePath           int rotate   0          try               context getContentResolver   notifyChange imageUri  null               File imageFile   new File imagePath                ExifInterface exif   new ExifInterface imageFile getAbsolutePath                 int orientation   exif getAttributeInt ExifInterface TAG ORIENTATION  ExifInterface ORIENTATION NORMAL                switch  orientation                case ExifInterface ORIENTATION ROTATE 270                  rotate   270                  break              case ExifInterface ORIENTATION ROTATE 180                  rotate   180                  break              case ExifInterface ORIENTATION ROTATE 90                  rotate   90                  break                               Log i  RotateImage    Exif orientation      orientation                 Log i  RotateImage    Rotate value      rotate             catch  Exception e                e printStackTrace                      return rotate             It work for me  I hope it can hepl you

User · Answer

You can create bitmap with captured image as below   Bitmap bitmap   Bitmap createScaledBitmap capturedImage  width  height  true     Here you can specify width and height of the bitmap that you want to set to your ImageView  The height and width you can set according to the screen dpi of the device also  by reading the screen dpi of different devices programmatically

User · Answer

i resolve this problem in this way  later i will improve the code   protected Void doInBackground byte      data            FileOutputStream outStream   null              Write to Internal Storage         try               File dir   new File  context getFilesDir                 dir mkdirs                 String fileName   image jpg               File outFile   new File dir  fileName               outFile setExecutable true  false               outFile setWritable true  false               outStream   new FileOutputStream outFile               outStream write data 0                outStream flush                outStream close                InputStream in   new FileInputStream context getFilesDir    image jpg                Bitmap bm2   BitmapFactory decodeStream in               OutputStream stream   new FileOutputStream String valueOf context getFilesDir   pathImage     idPicture   jpg                 bm2 compress Bitmap CompressFormat JPEG  50  stream               stream close                in close               catch  FileNotFoundException e                e printStackTrace              catch  IOException e                e printStackTrace              finally                     return null

User · Answer

You can compress image bitmap like this way   ByteArrayOutputStream out   new ByteArrayOutputStream    bitmap compress Bitmap CompressFormat PNG  100  out     Here 100 is quality of image and you can change format of image to get low resolution image

User · Answer

You should use Googles native image format WebP  it will shrink the image without losing quality  You can compress 80  of the picture without losing quality   You can use CompressFormat WEBP to encode any bitmap in WEBP format  Example from file  const int quality   100   FileOutputStream out   new FileOutputStream path    bitmap compress Bitmap CompressFormat WEBP  quality  out   out close

User · Answer

Try this is working great with me   private String decodeFile String path            String strMyImagePath   null          Bitmap scaledBitmap   null           try                  Part 1  Decode image             Bitmap unscaledBitmap   ScalingUtilities decodeFile path  DESIREDWIDTH  DESIREDHEIGHT  ScalingLogic FIT                if    unscaledBitmap getWidth    lt   800  amp  amp  unscaledBitmap getHeight    lt   800                        Part 2  Scale image                 scaledBitmap   ScalingUtilities createScaledBitmap unscaledBitmap  DESIREDWIDTH  DESIREDHEIGHT  ScalingLogic FIT                 else                   unscaledBitmap recycle                    return path                                Store to tmp file              String extr   Environment getExternalStorageDirectory   toString                File mFolder   new File extr     myTmpDir                if   mFolder exists                      mFolder mkdir                               String s    tmp png                File f   new File mFolder getAbsolutePath    s                strMyImagePath   f getAbsolutePath                FileOutputStream fos   null              try                   fos   new FileOutputStream f                   scaledBitmap compress Bitmap CompressFormat PNG  70  fos                   fos flush                    fos close                  catch  FileNotFoundException e                     e printStackTrace                  catch  Exception e                     e printStackTrace                               scaledBitmap recycle              catch  Throwable e                       if  strMyImagePath    null                return path                    return strMyImagePath           Utility Class  public class ScalingUtilities                   Utility function for decoding an image resource  The decoded bitmap will        be optimized for further scaling to the requested destination dimensions        and scaling logic                 param res The resources object containing the image data         param resId The resource id of the image data         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Decoded bitmap             public static Bitmap decodeResource Resources res  int resId  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Options options   new Options            options inJustDecodeBounds   true          BitmapFactory decodeResource res  resId  options           options inJustDecodeBounds   false          options inSampleSize   calculateSampleSize options outWidth  options outHeight  dstWidth                  dstHeight  scalingLogic           Bitmap unscaledBitmap   BitmapFactory decodeResource res  resId  options            return unscaledBitmap            public static Bitmap decodeFile String path  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Options options   new Options            options inJustDecodeBounds   true          BitmapFactory decodeFile path  options           options inJustDecodeBounds   false          options inSampleSize   calculateSampleSize options outWidth  options outHeight  dstWidth                  dstHeight  scalingLogic           Bitmap unscaledBitmap   BitmapFactory decodeFile path  options            return unscaledBitmap                        Utility function for creating a scaled version of an existing bitmap                param unscaledBitmap Bitmap to scale         param dstWidth Wanted width of destination bitmap         param dstHeight Wanted height of destination bitmap         param scalingLogic Logic to use to avoid image stretching         return New scaled bitmap object             public static Bitmap createScaledBitmap Bitmap unscaledBitmap  int dstWidth  int dstHeight              ScalingLogic scalingLogic            Rect srcRect   calculateSrcRect unscaledBitmap getWidth    unscaledBitmap getHeight                    dstWidth  dstHeight  scalingLogic           Rect dstRect   calculateDstRect unscaledBitmap getWidth    unscaledBitmap getHeight                    dstWidth  dstHeight  scalingLogic           Bitmap scaledBitmap   Bitmap createBitmap dstRect width    dstRect height                    Config ARGB 8888           Canvas canvas   new Canvas scaledBitmap           canvas drawBitmap unscaledBitmap  srcRect  dstRect  new Paint Paint FILTER BITMAP FLAG             return scaledBitmap                        ScalingLogic defines how scaling should be carried out if source and        destination image has different aspect ratio                CROP  Scales the image the minimum amount while making sure that at least        one of the two dimensions fit inside the requested destination area         Parts of the source image will be cropped to realize this                FIT  Scales the image the minimum amount while making sure both        dimensions fit inside the requested destination area  The resulting        destination dimensions might be adjusted to a smaller size than        requested              public static enum ScalingLogic           CROP  FIT                       Calculate optimal down-sampling factor given the dimensions of a source        image  the dimensions of a destination area and a scaling logic                 param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal down scaling sample size for decoding             public static int calculateSampleSize int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic FIT                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return srcWidth   dstWidth                else                   return srcHeight   dstHeight                          else               final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return srcHeight   dstHeight                else                   return srcWidth   dstWidth                                                Calculates source rectangle for scaling bitmap                param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal source rectangle             public static Rect calculateSrcRect int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic CROP                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    final int srcRectWidth    int  srcHeight   dstAspect                   final int srcRectLeft    srcWidth - srcRectWidth    2                  return new Rect srcRectLeft  0  srcRectLeft   srcRectWidth  srcHeight                 else                   final int srcRectHeight    int  srcWidth   dstAspect                   final int scrRectTop    int  srcHeight - srcRectHeight    2                  return new Rect 0  scrRectTop  srcWidth  scrRectTop   srcRectHeight                           else               return new Rect 0  0  srcWidth  srcHeight                                   Calculates destination rectangle for scaling bitmap                param srcWidth Width of source image         param srcHeight Height of source image         param dstWidth Width of destination area         param dstHeight Height of destination area         param scalingLogic Logic to use to avoid image stretching         return Optimal destination rectangle             public static Rect calculateDstRect int srcWidth  int srcHeight  int dstWidth  int dstHeight              ScalingLogic scalingLogic            if  scalingLogic    ScalingLogic FIT                final float srcAspect    float srcWidth    float srcHeight              final float dstAspect    float dstWidth    float dstHeight               if  srcAspect  gt  dstAspect                    return new Rect 0  0  dstWidth   int  dstWidth   srcAspect                  else                   return new Rect 0  0   int  dstHeight   srcAspect   dstHeight                           else               return new Rect 0  0  dstWidth  dstHeight

User · Answer

Try this Method this will convert your Image file to compressed format and you can customized the compress level by varrying the value of x  amp   y in the code Indicated in comment line         File mImageFile   saveBitmapToFile ImageFile          public File saveBitmapToFile File file          try               BitmapFactory options to downsize the image         BitmapFactory Options o   new BitmapFactory Options            o inJustDecodeBounds   true          o inSampleSize   6             factor of downsizing the image          FileInputStream inputStream   new FileInputStream file             Bitmap selectedBitmap   null          BitmapFactory decodeStream inputStream  null  o           inputStream close                The new size we want to scale to         final int REQUIRED SIZE 200            x                         Find the correct scale value  It should be the power of 2          int scale   1          while o outWidth   scale   2  gt   REQUIRED SIZE  amp  amp                  o outHeight   scale   2  gt   REQUIRED SIZE                scale    2                     BitmapFactory Options o2   new BitmapFactory Options            o2 inSampleSize   scale          inputStream   new FileInputStream file            Bitmap selectedBitmap   BitmapFactory decodeStream inputStream  null  o2           inputStream close                here i override the original image file         File outPutFile   File createTempFile  abc   image            FileOutputStream outputStream   new FileOutputStream outPutFile                                                        y                selectedBitmap compress Bitmap CompressFormat JPEG  95   outputStream            return outPutFile        catch  Exception e            return null            Thanks

[android] How to compress image size?

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