Save bitmap to external storage and use media scanner to display image in gallery

Save bitmap to external storage

private void savePalette(Bitmap bitmap) {

        String root = Environment.getExternalStorageDirectory().toString();
        File myDir = new File(root + "/palette.io");
        if(!myDir.exists()){
            myDir.mkdirs();
        }
        String fileName = "palette-io-generated-" + System.currentTimeMillis() + ".jpg";
        File file = new File(myDir, fileName);

        try {
            FileOutputStream out = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
            out.flush();
            out.close();
            MediaScannerConnection.scanFile(this,
                    new String[]{file.toString()}, null,
                    new MediaScannerConnection.OnScanCompletedListener() {
                        public void onScanCompleted(String path, Uri uri) {
                            Log.i("ExternalStorage", "Scanned " + path + ":");
                            Log.i("ExternalStorage", "-> uri=" + uri);
                        }
                    });
            Msg.build(this, "palette saved").show();
        } catch (Exception e) {
            e.printStackTrace();
            Msg.build(this, e.getMessage()).show();
        }
    }