Convert Bitmap to File

Question

I understand that using BitmapFactory can convert a File to a Bitmap  but is there any way to convert a Bitmap image to a File

User · Accepted Answer

Try this   bitmap compress Bitmap CompressFormat PNG  quality  outStream     See this

User · Answer

Converting Bitmap to File needs to be done in background  NOT IN THE MAIN THREAD  it hangs the UI specially if the bitmap was large  File file   public class fileFromBitmap extends AsyncTask lt Void  Integer  String gt         Context context      Bitmap bitmap      String path external   Environment getExternalStorageDirectory     File separator    temporary file jpg        public fileFromBitmap Bitmap bitmap  Context context            this bitmap   bitmap          this context  context              Override     protected void onPreExecute             super onPreExecute               before executing doInBackground            update your UI            exp  make progressbar visible             Override     protected String doInBackground Void    params             ByteArrayOutputStream bytes   new ByteArrayOutputStream            bitmap compress Bitmap CompressFormat JPEG  100  bytes           file   new File Environment getExternalStorageDirectory     File separator    temporary file jpg            try               FileOutputStream fo   new FileOutputStream file               fo write bytes toByteArray                 fo flush                fo close              catch  IOException e                e printStackTrace                       return null               Override     protected void onPostExecute String s            super onPostExecute s              back to main thread after finishing doInBackground            update your UI or take action after            exp  make progressbar gone           sendFile file              Calling it  new fileFromBitmap my bitmap  getApplicationContext    execute      you MUST use the file in onPostExecute    To change directory of file to be stored in cache replace line     file   new File Environment getExternalStorageDirectory     File separator    temporary file jpg      with    file    new File context getCacheDir     temporary file jpg

User · Answer

Hope it will help u     create a file to write bitmap data File f   new File context getCacheDir    filename   f createNewFile       Convert bitmap to byte array Bitmap bitmap   your bitmap  ByteArrayOutputStream bos   new ByteArrayOutputStream    bitmap compress CompressFormat PNG  0   ignored for PNG    bos   byte   bitmapdata   bos toByteArray       write the bytes in file FileOutputStream fos   new FileOutputStream f   fos write bitmapdata   fos flush    fos close

User · Answer

File file   new File  path    OutputStream os   new BufferedOutputStream new FileOutputStream file    bitmap compress Bitmap CompressFormat JPEG  100  os   os close

User · Answer

Hope this helps u    class MainActivity   AppCompatActivity      override fun onCreate savedInstanceState  Bundle         super onCreate savedInstanceState      setContentView R layout activity main          Get the bitmap from assets and display into image view     val bitmap   assetsToBitmap  tulip jpg          If bitmap is not null     bitmap  let           image view bitmap setImageBitmap bitmap                 Click listener for button widget     button setOnClickListener          if bitmap  null                  Save the bitmap to a file and display it into image view             val uri   bitmapToFile bitmap              image view file setImageURI uri                  Display the saved bitmap s uri in text view             text view text   uri toString                   Show a toast message             toast  Bitmap saved in a file             else              toast  bitmap not found                           Method to get a bitmap from assets private fun assetsToBitmap fileName String  Bitmap       return try          val stream   assets open fileName          BitmapFactory decodeStream stream       catch  e IOException           e printStackTrace           null              Method to save an bitmap to a file private fun bitmapToFile bitmap Bitmap   Uri          Get the context wrapper     val wrapper   ContextWrapper applicationContext          Initialize a new file instance to save bitmap object     var file   wrapper getDir  Images  Context MODE PRIVATE      file   File file    UUID randomUUID    jpg        try             Compress the bitmap and save in jpg format         val stream OutputStream   FileOutputStream file          bitmap compress Bitmap CompressFormat JPEG 100 stream          stream flush           stream close        catch  e IOException           e printStackTrace                 Return the saved bitmap uri     return Uri parse file absolutePath

User · Answer

Most of the answers are too lengthy or too short not fulfilling the purpose  For those how are looking for Java or Kotlin code to Convert bitmap to File Object  Here is the detailed article I have written on the topic  Convert Bitmap to File in Android public static File bitmapToFile Context context Bitmap bitmap  String fileNameToSave       File name like  quot image png quot            create a file to write bitmap data         File file   null          try               file   new File Environment getExternalStorageDirectory     File separator   fileNameToSave               file createNewFile       Convert bitmap to byte array             ByteArrayOutputStream bos   new ByteArrayOutputStream                bitmap compress Bitmap CompressFormat PNG  0   bos      YOU can also save it in JPEG             byte   bitmapdata   bos toByteArray       write the bytes in file             FileOutputStream fos   new FileOutputStream file               fos write bitmapdata               fos flush                fos close                return file           catch  Exception e               e printStackTrace                return file     it will return null

[android] Convert Bitmap to File

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