How to create an app image folder to show in Android gallery

Well I found the answer in the end.

It turned out to be what I suspected. The saved image needs to have some metadata added in order to be seen in the gallery (at least in my device).

This is what I did:

OutputStream fOut = null;
    File file = new File(imagePath,"GE_"+ System.currentTimeMillis() +".jpg");

    try {
        fOut = new FileOutputStream(file);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
    try {
        fOut.flush();
        fOut.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    ContentValues values = new ContentValues();
    values.put(Images.Media.TITLE, this.getString(R.string.picture_title));
    values.put(Images.Media.DESCRIPTION, this.getString(R.string.picture_description));
    values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis ());
    values.put(Images.ImageColumns.BUCKET_ID, file.toString().toLowerCase(Locale.US).hashCode());
    values.put(Images.ImageColumns.BUCKET_DISPLAY_NAME, file.getName().toLowerCase(Locale.US));
    values.put("_data", file.getAbsolutePath());

    ContentResolver cr = getContentResolver();
    cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

I have had the same problem. The second way is the correct way, but you don't see the images in the Gallery because the gallery needs to be refreshed. So, you can wait a while until it refreshes itself, or you can use the MediaScanner - look here

Hope this helped!

Try this

private void createDirectoryAndSaveFile(Bitmap imageToSave, String fileName) {

    File direct = new File(Environment.getExternalStorageDirectory() + "/DirName");

    if (!direct.exists()) {
        File wallpaperDirectory = new File("/sdcard/DirName/");
        wallpaperDirectory.mkdirs();
    }

        File file = new File(new File("/sdcard/DirName/"), fileName);
        if (file.exists())
            file.delete();
        try {
            FileOutputStream out = new FileOutputStream(file);
            imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
 }

I did the following to get it to work:

public void galleryAddPic() {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_MOUNTED);
    String mCurrentPhotoPath = "file:" + image.getAbsolutePath(); // image is the created file image
    File file = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(file);
    mediaScanIntent.setData(contentUri);
    sendBroadcast(mediaScanIntent);
}