Save bitmap to file function

Question

I m trying to save a bitmap to file and a specific directly using a function I ve created  It s not working  It crashes after bitmap compress part  before here3        File dir   new File filepath        if  dir exists   dir mkdirs         File file   new File Environment getExternalStorageDirectory     filepath  side     png        FileOutputStream fOut   new FileOutputStream file        bitmap compress Bitmap CompressFormat PNG  85  fOut       fOut flush        fOut close         System out println filepath        bitmap recycle        System gc        Error log   06-29 00 16 38 089  D AndroidRuntime 3260   Shutting down VM 06-29 00 16 38 089  W dalvikvm 3260   threadid 1  thread exiting with uncaught exception  group 0xb587f4f0  06-29 00 16 38 089  E AndroidRuntime 3260   FATAL EXCEPTION  main 06-29 00 16 38 089  E AndroidRuntime 3260   java lang RuntimeException  Failure delivering result ResultInfo who null  request 0  result -1  data Intent   act android intent action VIEW dat content   org openintents filemanager mimetype  mnt sdcard download 02977 awreckedboatintheocean 1280x1024 jpg    to activity  com polygonattraction testbirds com polygonattraction testbirds functions SelectImageSource   java lang IllegalStateException  Can t compress a recycled bitmap 06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread deliverResults ActivityThread java 2532  06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread handleSendResult ActivityThread java 2574  06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread access 2000 ActivityThread java 117  06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread H handleMessage ActivityThread java 961  06-29 00 16 38 089  E AndroidRuntime 3260       at android os Handler dispatchMessage Handler java 99  06-29 00 16 38 089  E AndroidRuntime 3260       at android os Looper loop Looper java 130  06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread main ActivityThread java 3683  06-29 00 16 38 089  E AndroidRuntime 3260       at java lang reflect Method invokeNative Native Method  06-29 00 16 38 089  E AndroidRuntime 3260       at java lang reflect Method invoke Method java 507  06-29 00 16 38 089  E AndroidRuntime 3260       at com android internal os ZygoteInit MethodAndArgsCaller run ZygoteInit java 839  06-29 00 16 38 089  E AndroidRuntime 3260       at com android internal os ZygoteInit main ZygoteInit java 597  06-29 00 16 38 089  E AndroidRuntime 3260       at dalvik system NativeStart main Native Method  06-29 00 16 38 089  E AndroidRuntime 3260   Caused by  java lang IllegalStateException  Can t compress a recycled bitmap 06-29 00 16 38 089  E AndroidRuntime 3260       at android graphics Bitmap checkRecycled Bitmap java 180  06-29 00 16 38 089  E AndroidRuntime 3260       at android graphics Bitmap compress Bitmap java 581  06-29 00 16 38 089  E AndroidRuntime 3260       at com polygonattraction testbirds functions Functions SaveToFile Functions java 144  06-29 00 16 38 089  E AndroidRuntime 3260       at com polygonattraction testbirds functions SelectImageSource onActivityResult SelectImageSource java 113  06-29 00 16 38 089  E AndroidRuntime 3260       at android app Activity dispatchActivityResult Activity java 3908  06-29 00 16 38 089  E AndroidRuntime 3260       at android app ActivityThread deliverResults ActivityThread java 2528

User · Answer

Two example works for me  for your reference   Bitmap bitmap   Utils decodeBase64 base64   try       File file   new File filePath       FileOutputStream fOut   new FileOutputStream file       bitmap compress Bitmap CompressFormat PNG  85  fOut       fOut flush        fOut close      catch  Exception e        e printStackTrace        LOG i null   Save file error         return false      and this one  Bitmap savePic   Utils decodeBase64 base64   File file   new File filePath   File path   new File file getParent      if  savePic    null        try              build directory         if  file getParent      null  amp  amp   path isDirectory                  path mkdirs                         output image to file         FileOutputStream fos   new FileOutputStream filePath           savePic compress Bitmap CompressFormat PNG  90  fos           fos close            ret   true        catch  Exception e            e printStackTrace            else       LOG i TAG   savePicture image parsing error

User · Answer

Here is the function which help you   private void saveBitmap Bitmap bitmap String path           if bitmap  null               try                   FileOutputStream outputStream   null                  try                       outputStream   new FileOutputStream path     here is set your file path where you want to save or also here you can set file object directly                      bitmap compress Bitmap CompressFormat PNG  100  outputStream      bitmap is your Bitmap instance  if you want to compress it you can compress reduce percentage                        PNG is a lossless format  the compression factor  100  is ignored                   catch  Exception e                        e printStackTrace                      finally                       try                           if  outputStream    null                                outputStream close                                                    catch  IOException e                            e printStackTrace                                                          catch  Exception e                    e printStackTrace

User · Answer

In kotlin    private fun File writeBitmap bitmap  Bitmap  format  Bitmap CompressFormat  quality  Int        outputStream   use   out - gt          bitmap compress format  quality  out          out flush             usage example   File exportDir   map png   writeBitmap bitmap  Bitmap CompressFormat PNG  85

User · Answer

implementation save bitmap and load bitmap directly  fast and ease on mfc class  void CMRSMATH1Dlg  Loadit TCHAR  destination  CDC  amp memdc    CImage img  PBITMAPINFO bmi  BITMAPINFOHEADER Info  BITMAPFILEHEADER bFileHeader  CBitmap bm       CFile file2  file2 Open destination  CFile  modeRead   CFile  typeBinary   file2 Read  amp bFileHeader  sizeof BITMAPFILEHEADER    file2 Read  amp Info  sizeof BITMAPINFOHEADER        BYTE ch  int width   Info biWidth  int height   Info biHeight  if  height  lt  0 height   -height  int size1   width height   3  int size2     width   24   31    32    4   height  int widthnew    size2 - size1    height  BYTE   buffer    BYTE   GlobalAlloc GPTR  size2                              HGDIOBJ old  unsigned char alpha   0      int z   0    z   0  int gap    size2 - size1    height  for  int y   0 y  lt  height y          for  int x   0 x  lt  width 3 x                  file2 Read  amp ch  1           buffer z    ch          z              for  int z1   0 z1  lt gap z1                  file2 Read  amp ch 1           bm CreateCompatibleBitmap  amp memdc  width  height   bm SetBitmapBits size1 buffer   old   memdc SelectObject  amp bm                                       bm SetBitmapBits size1  buffer         GetDC  - gt BitBlt 1  95  width  height   amp memdc  0  0  SRCCOPY    memdc SelectObject  amp old    bm DeleteObject     GlobalFree buffer         file2 Close        void CMRSMATH1Dlg  saveit CBitmap  amp bit1  CDC  amp memdc  TCHAR  destination           BITMAP bm  PBITMAPINFO bmi  BITMAPINFOHEADER Info  BITMAPFILEHEADER bFileHeader  CFile file1              CSize size   bit1 GetBitmap  amp bm    int z   0     BYTE ch   0   size cx   bm bmWidth   size cy   bm bmHeight   int width   size cx       int size1    size cx   size cy    int size2   size1   3     size1     size cx   24   31    32   4  size cy        BYTE   buffer    BYTE   GlobalAlloc GPTR  size2                   bFileHeader bfType    B      M   lt  lt  8     bFileHeader bfOffBits   sizeof BITMAPFILEHEADER    sizeof BITMAPINFOHEADER    bFileHeader bfSize   bFileHeader bfOffBits   size1   bFileHeader bfReserved1   0   bFileHeader bfReserved2   0      Info biSize   sizeof BITMAPINFOHEADER    Info biPlanes   1   Info biBitCount   24   bm bmBitsPixel   bitsperpixel                   32  Info biCompression   BI RGB   Info biWidth  bm bmWidth   Info biHeight  -bm bmHeight    reverse pic if negative height  Info biSizeImage  size1   Info biClrImportant   0   if  bm bmBitsPixel  lt   8          Info biClrUsed   1  lt  lt  bm bmBitsPixel    else  Info biClrUsed   0   Info biXPelsPerMeter   0   Info biYPelsPerMeter   0   bit1 GetBitmapBits size2  buffer          file1 Open destination  CFile  modeCreate   CFile  modeWrite  CFile  typeBinary 0    file1 Write  amp bFileHeader  sizeof BITMAPFILEHEADER     file1 Write  amp Info  sizeof BITMAPINFOHEADER     unsigned char alpha   0       for  int y   0 y lt size cy y            for  int x   0 x lt size cx x                      for reverse picture below            z      size cy - 1 - y  size cx     x     3                 z      y  size cx     x     3       file1 Write  amp buffer z   1        file1 Write  amp buffer z   1   1        file1 Write  amp buffer z   2   1                              for  int z   0 z  lt   size1 - size2    size cy z                    file1 Write  amp alpha  1                 GlobalFree buffer         file1 Close       file1 m hFile   NULL

User · Answer

You need an appropriate permission in manifest xml    lt uses-permission android name  android permission WRITE EXTERNAL STORAGE   gt   out flush   check the out is not null    String file path   Environment getExternalStorageDirectory   getAbsolutePath                                    PhysicsSketchpad   File dir   new File file path   if  dir exists        dir mkdirs    File file   new File dir   sketchpad    pad t id     png    FileOutputStream fOut   new FileOutputStream file    bmp compress Bitmap CompressFormat PNG  85  fOut   fOut flush    fOut close

[android] Save bitmap to file function

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