convert android.graphics.Bitmap to java.io.File

Question

I want to upload edited Bitmap image to server using multipart uploading like this,

multipartEntity.addPart("ProfilePic", new FileBody(file));

But I can't convert Bitmap(android.graphics.Bitmap) image to File(java.io.File).

I tried to convert it to byte array but It also didn't worked.

Does anybody know inbuilt function of android or any solution to convert Bitmap to File?

Please help...

Answer 1

This should do it:

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);
  }
}

Change the Bitmap.CompressFormat and extension to suit your purpose.

Answer 2

Although the selected answer is correct but for those who are looking for Kotlin code. Here I have already written a detailed article on the topic for both Java and Kotlin. 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
        }
    }