android, how to convert bitmap to file object

Question

I want to convert a bitmap object to a file object. However, I want to store the file object on memory, not in SDcard or internal storage, so that I can use the image file without saving in gallery.

The code below is just for acquiring the bitmap and converting it into smaller image

 public void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);

    if(resultCode != RESULT_OK)
        return;

    if(requestCode == PICK_FROM_CAMERA){

        imageUri = data.getData();



        Cursor c = this.getContentResolver().query(imageUri, null, null, null, null);
        c.moveToNext();
        absolutePath = c.getString(c.getColumnIndex(MediaStore.MediaColumns.DATA));

        Glide.with(this).load(imageUri).into(image);


        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 4;
        bitmap = BitmapFactory.decodeFile(absolutePath, options);



    }

`not in SDcard or internal storage, so that I can use the image file`. Impossible. There are no other places for files. — greenapps, Jan 23 '17 at 10:44

score 21 · Accepted Answer · answered Jan 23 '17 at 05:33

21

Hope this will help you

private static void persistImage(Bitmap bitmap, String name) {
File filesDir = getAppContext().getFilesDir();
File imageFile = new File(filesDir, name + ".jpg");

OutputStream os;
try {
  os = new FileOutputStream(imageFile);
  bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
  os.flush();
  os.close();
} catch (Exception e) {
  Log.e(getClass().getSimpleName(), "Error writing bitmap", e);
  }
}

answered Jan 23 '17 at 05:33

Akash

961
6
15

1

@ thanks!!!!!!!!!` ???? How can you approve this solution so loud? You said `not in SDcard or internal storage`, – greenapps Jan 23 '17 at 10:41
what is bitmap.compress? why this function give JPEG format? and what is 100? – roghayeh hosseini Feb 04 '19 at 17:56
@roghayehhosseini its the quality – Eldhopj Jun 20 '19 at 09:38
1

how to we create a temp file for a bitmap and post it to server – pb007 Nov 23 '19 at 10:05

score 3 · Answer 2 · answered Jun 22 '20 at 09:39

For those how are looking for 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

fun bitmapToFile(bitmap: Bitmap, fileNameToSave: String): File? { // File name like "image.png"
        //create a file to write bitmap data
        var file: File? = null
        return try {
            file = File(Environment.getExternalStorageDirectory().toString() + File.separator + fileNameToSave)
            file.createNewFile()

            //Convert bitmap to byte array
            val bos = ByteArrayOutputStream()
            bitmap.compress(Bitmap.CompressFormat.PNG, 0, bos) // YOU can also save it in JPEG
            val bitmapdata = bos.toByteArray()

            //write the bytes in file
            val fos = FileOutputStream(file)
            fos.write(bitmapdata)
            fos.flush()
            fos.close()
            file
        } catch (e: Exception) {
            e.printStackTrace()
            file // it will return null
        }
    }

android, how to convert bitmap to file object

2 Answers2

Linked