How to resize Image in Android

Question

I am creating an application and want to setup a gallery view  I do not want the images in the gallery view to be full size  How do I resize images in Android

User · Answer

public Bitmap resizeBitmap String photoPath  int targetW  int targetH        BitmapFactory Options bmOptions   new BitmapFactory Options        bmOptions inJustDecodeBounds   true      BitmapFactory decodeFile photoPath  bmOptions       int photoW   bmOptions outWidth      int photoH   bmOptions outHeight       int scaleFactor   1      if   targetW  gt  0      targetH  gt  0                 scaleFactor   Math min photoW targetW  photoH targetH                      bmOptions inJustDecodeBounds   false      bmOptions inSampleSize   scaleFactor      bmOptions inPurgeable   true    Deprecated API 21      return BitmapFactory decodeFile photoPath  bmOptions

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bm   Bitmap createScaledBitmap bitmapSource  width  height  true

User · Answer

resized   Bitmap createScaledBitmap yourImageBitmap  int  yourImageBitmap getWidth   0 9    int  yourBitmap getHeight   0 9   true

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BitmapFactory Options options new BitmapFactory Options                options inSampleSize   10              FixBitmap   BitmapFactory decodeFile ImagePath  options                 FixBitmap   BitmapFactory decodeResource getResources    R drawable gv               byteArrayOutputStream   new ByteArrayOutputStream               FixBitmap compress Bitmap CompressFormat JPEG  80  byteArrayOutputStream     compress to 50  of original image quality            byteArray   byteArrayOutputStream toByteArray                ConvertImage   Base64 encodeToString byteArray  Base64 DEFAULT

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You can use Matrix to resize your camera image                             BitmapFactory Options options new BitmapFactory Options    InputStream is   getContentResolver   openInputStream currImageURI   bm   BitmapFactory decodeStream is null options   int Height   bm getHeight    int Width   bm getWidth    int newHeight   300  int newWidth   300  float scaleWidth     float  newWidth    Width  float scaleHeight     float  newHeight    Height  Matrix matrix   new Matrix    matrix postScale scaleWidth  scaleHeight   Bitmap resizedBitmap   Bitmap createBitmap bm  0  0 Width  Height  matrix  true   BitmapDrawable bmd   new BitmapDrawable resizedBitmap

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Try   Bitmap yourBitmap  Bitmap resized   Bitmap createScaledBitmap yourBitmap  newWidth  newHeight  true     or   resized   Bitmap createScaledBitmap yourBitmap  int  yourBitmap getWidth   0 8    int  yourBitmap getHeight   0 8   true

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photo is bitmap image  Bitmap btm00   Utils getResizedBitmap photo  200  200     setimage setImageBitmap btm00      And in Utils class    public static Bitmap getResizedBitmap Bitmap bm  int newHeight  int newWidth        int width   bm getWidth        int height   bm getHeight        float scaleWidth     float  newWidth    width      float scaleHeight     float  newHeight    height      Matrix matrix   new Matrix           RESIZE THE BIT MAP     matrix postScale scaleWidth  scaleHeight          RECREATE THE NEW BITMAP     Bitmap resizedBitmap   Bitmap createBitmap bm  0  0  width  height              matrix  false       return resizedBitmap

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Following is the function to resize bitmap by keeping the same Aspect Ratio  Here I have also written a detailed blog post on the topic to explain this method  Resize a Bitmap by Keeping the Same Aspect Ratio      public static Bitmap resizeBitmap Bitmap source  int maxLength           try              if  source getHeight    gt   source getWidth                     int targetHeight   maxLength                 if  source getHeight    lt   targetHeight       if image already smaller than the required height                    return source                                   double aspectRatio    double  source getWidth      double  source getHeight                   int targetWidth    int   targetHeight   aspectRatio                   Bitmap result   Bitmap createScaledBitmap source  targetWidth  targetHeight  false                  if  result    source                                    return result               else                  int targetWidth   maxLength                  if  source getWidth    lt   targetWidth       if image already smaller than the required height                    return source                                   double aspectRatio     double  source getHeight        double  source getWidth                    int targetHeight    int   targetWidth   aspectRatio                   Bitmap result   Bitmap createScaledBitmap source  targetWidth  targetHeight  false                  if  result    source                                    return result                                catch  Exception e                      return source

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BitmapFactory Options options new BitmapFactory Options    options inSampleSize 2    try to decrease decoded image  Bitmap bitmap BitmapFactory decodeStream is  null  options    bitmap compress Bitmap CompressFormat JPEG  70  fos     compressed bitmap to file

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Capture the image and resize it   Bitmap image2    Bitmap  data getExtras   get  data    img setImageBitmap image2   String incident ID   IncidentFormActivity incident id   imagepath   sdcard RDMS   incident ID  x     PNG   File file   new File imagepath       try           double xFactor   0          double width   Double valueOf image2 getWidth             Log v  WIDTH   String valueOf width            double height   Double valueOf image2 getHeight             Log v  height   String valueOf height            if width gt height           xFactor   841 width            else          xFactor   595 width          Log v  Nheight   String valueOf width xFactor    Log v  Nweight   String valueOf height xFactor    int Nheight    int    xFactor height    int NWidth   int   xFactor   width      bm   Bitmap createScaledBitmap  image2 NWidth  Nheight  true   file createNewFile    FileOutputStream ostream   new FileOutputStream file   bm compress CompressFormat PNG  100  ostream   ostream close

[android] How to resize Image in Android?

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