Poor performance in the Listview with Images

Question

I did a lot of research before opening this title, but somehow I didn't get the result I wanted. My Listview has accelerated, but it's not enough.

When I make the listview up and down, sometimes it slows down and there are little frosts.

Is this because the Listview only consists of pictures? But when I examine other applications, I see that there is no problem in them.

Would you please review?

This is my adapter code :

public class pop_Adapter extends BaseAdapter  {
    private LayoutInflater userInflater;
    private List<pop_User> userList;
    Activity aa;
    public pop_Adapter(Activity activity, List<pop_User> userList) {
        userInflater = (LayoutInflater) activity.getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
        aa = activity;
        this.userList = userList;
    }

    @Override
    public int getCount() {
        return userList.size();
    }

    @Override
    public Object getItem(int i) {
        return userList.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    class ViewYerTutucu{

        RelativeLayout rela1;
        LinearLayout activity_main,lin1;
        TextView indir;
        ImageView imageViewUserPicture;

        ViewYerTutucu(View v){
            activity_main = (LinearLayout) v.findViewById(R.id.activity_main);
            indir = (TextView) v.findViewById(R.id.indirmeSayisi);
            imageViewUserPicture = (ImageView) v.findViewById(R.id.resim);
            lin1 = (LinearLayout) v.findViewById(R.id.lin1);

            rela1 = (RelativeLayout) v.findViewById(R.id.rela1);
            rela1.getLayoutParams().height = (int) ( (MainActivity.height / MainActivity.width) * MainActivity.width/2 );  //(int)MainActivity.width/2-36;
            indir.setTextSize(MainActivity.pxToDp((int)MainActivity.width/23));

        }

    }


    @Override
    public View getView(final int i, View view, ViewGroup viewGroup) {

        View lineView = view;

        ViewYerTutucu tutucu=null;

        if (lineView == null) {
            lineView = userInflater.inflate(R.layout.custom_pop, viewGroup, false);
            tutucu=new ViewYerTutucu(lineView);
            lineView.setTag(tutucu);
        }
        else{
            tutucu= (ViewYerTutucu) lineView.getTag();
        }

        final pop_User user = userList.get(i);

        tutucu.indir.setText(user.getIndirme());

        Glide.with(aa).load(user.getTags()).into(tutucu.imageViewUserPicture);

        final ViewYerTutucu finalTutucu = tutucu;
        tutucu.lin1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MainActivity.hangiBolum = "pop-"+(i*2);
                fragoyunsifir.ResimDegistir(user.getTags());
                fragoyunsifir.paylas.setTag(user.getId());
                fragoyunsifir.indir.setTag(user.getTags());
                fragoyunsifir.button1.setTag(user.getResim());
                Animation fadeOut = AnimationUtils.loadAnimation(aa, R.anim.fade_in_acilis);
                fragoyunsifir.activity_main.startAnimation(fadeOut);
                fadeOut.setAnimationListener(new Animation.AnimationListener() {
                    @Override
                    public void onAnimationStart(Animation animation) {

                    }

                    @Override
                    public void onAnimationEnd(Animation animation) {
                        fragoyunsifir.gorunurYap();
                    }

                    @Override
                    public void onAnimationRepeat(Animation animation) {

                    }
                });
            }
        });



        tutucu.indir.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(aa, finalTutucu.indir.getText()+" downloads", Toast.LENGTH_SHORT).show();
            }
        });

        if(reachedEndOfList(i)) loadMoreData();

        return lineView;
    }




    private boolean reachedEndOfList(int position) {
        // can check if close or exactly at the end
        return position == getCount() - 1;
    }

    private void loadMoreData() {

        MainActivity.News();

    }
}

Sample picture loaded :https://source.unsplash.com/-hI5dX2ObAs/540x720

Make use of either Picasso or Glide image loading library, and then if the images are small, as in thumbnail, load thumbnails rather and load full image on big preview. — Janwilx72, Oct 22 '18 at 12:08
Unsplash has very high definition images. This can cause problems in your scrolling as well — Janwilx72, Oct 22 '18 at 12:12
@Janwilx72 i think, the cause of the problem is not in your answer. — MuDa Oyunu, Oct 22 '18 at 12:13

allycat · Answer 1 · 2018-10-22T12:16:56.133

1

It would be best for you to use a RecyclerView for smooth scrolling and performance. Have a look at this guide to implement it in your app. Also consider using an image loading library like picasso. This is because unsplash has high resolution images, which take time to download. However, an image loader library allows you to cache and compress images so that they can load quickly into your views.

edited Oct 22 '18 at 12:16

answered Oct 22 '18 at 12:09

allycat

105
5

already i have glide.. also i tried recylerview but result didn't change. – MuDa Oyunu Oct 22 '18 at 12:16
Are you populating your List with data from network requests made to the unsplash api? – allycat Oct 22 '18 at 12:20
Oh okay, and how are making those requests and how are you parsing them? – allycat Oct 22 '18 at 12:36
I send link to the adapter from activity and load it with glide. – MuDa Oyunu Oct 22 '18 at 12:39
Alright, so you're not using a networking library to make requests and a JSON parsing library? – allycat Oct 22 '18 at 12:49
Thanks for your advice, i will see.. but do you have any opinion for this subject ? listview not very fast.. – MuDa Oyunu Oct 22 '18 at 13:03
True, RecyclerView is faster than ListView, please have a look at this [question](https://stackoverflow.com/questions/26728651/recyclerview-vs-listview) – allycat Oct 22 '18 at 13:23

score 0 · Answer 2 · answered Oct 22 '18 at 13:04

For smooth scrolling and performance add Recyclerview inside ScrollView and set

 android:nestedScrollingEnabled="false"

This will load all content inside your recyclerview.. otherwise it will only load when you scroll down. This is what i think.

And also set

    @Override
    public int getItemViewType(int position) {
    return position;
   }

inside your recyclerview adapter.
It is to prevent position of the image that will change if you further scroll down and got to top.

Poor performance in the Listview with Images

2 Answers2