Slow image loading

Question

I have an application connected to the server, and when downloading photos seems so slow, and when scrolling up and down seems slippery, you want to read the image again! This is my slip adapter:

Dataadapter

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
    private Context context;
    private ArrayList<AndroidVersion> android;


    public DataAdapter(Context context,ArrayList<AndroidVersion> android) {
        this.context = context;
        this.android = android;
    }


    @Override
    public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(DataAdapter.ViewHolder viewHolder, int i) {

        viewHolder.tv_name.setText(android.get(i).getName());
        viewHolder.tv_version.setText(android.get(i).getVer());
        viewHolder.tv_api_level.setText(android.get(i).getApi());

        // load image into imageview using glide
        Glide.with(context).load("http://memaraneha.ir/Erfan/images/"+android.get(i).getPic())
                .placeholder(R.drawable.truiton)
                .error(R.drawable.truiton)
                .into(viewHolder.tv_image);
    }

    @Override
    public int getItemCount() {
        return android.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder{
        private TextView tv_name,tv_version,tv_api_level;
        public ImageView tv_image;
        public ViewHolder(View view) {
            super(view);

            tv_name = (TextView)view.findViewById(R.id.tv_name);
            tv_version = (TextView)view.findViewById(R.id.tv_version);
            tv_api_level = (TextView)view.findViewById(R.id.tv_api_level);
            tv_image= (ImageView) view.findViewById(R.id.img);

        }
    }

}

If anyone can help please do it!

Answer 1

Just add this when you get the image from URL, this code reduces the size of this image

You can also do this,

ByteArrayOutputStream bytes = new ByteArrayOutputStream();

    //save scaled down image to cache dir
    newBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

    File imageFile = new File(filePath);

    // write the bytes in file
    FileOutputStream fo = new FileOutputStream(imageFile);
    fo.write(bytes.toByteArray());

check this example

Answer 2

dontTransform(), . .

Answer 3

diskCacheStrategy (DiskCacheStrategy.ALL).

Answer 4

(JPEG, 4608 × 3456 ) - : 6 149,64 (6 297 232 )

Glide 4.7.1. , . , , Glide.