RecyclerView scrolling very slow and laggy

Question

Hey I am using recyclerview with list-card design and on every card I have an image, not a large one it weights 1.5 mb I am loading 12 cards but the scrolling is so laggy I tried using PICASSO and it didn't helped, the thing is when I replace the image with a much smaller one (300 bytes) it scrolles well but it doesn't solve my problem..

the relevant part of the cards xml is:

 <android.support.v7.widget.CardView android:id="@+id/card_item" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:clickable="true" card_view:cardCornerRadius="4dp"> <RelativeLayout android:id="@+id/cont_card_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:clickable="true" android:background="#FFFFFF"> <ImageView android:id="@+id/im_item_icon" android:layout_width="wrap_content" android:layout_height="170dp" android:scaleType="fitXY" android:layout_alignParentTop="true" android:layout_alignParentStart="true" />

as I was saying I tried using PICASSO and it didn't helped

Picasso.with(context).load(R.drawable.bg_partyt).into(holder.imageView);

any ideas?

1.5mb is large so try using Picasso's .fit() method. fit() will measure the dimensions of the target ImageView (@+id/im_item_icon) and then uses Picasso's own resize() method to reduce the image size to the dimensions of the target ImageView. More info here: futurestud.io/tutorials/picasso-image-resizing-scaling-and-fit — MikeOscarEcho
– MikeOscarEcho, Commented Nov 23, 2016 at 20:23
I am trying to use the .fit() but it just doesn't show the image at all. — orisgoofo
– orisgoofo, Commented Nov 23, 2016 at 22:45

Matthew Shearer · Accepted Answer · 2016-11-23 20:59:27Z

your image is way to big.

You could try using Glide instead of picasso. It handles big images a little bit better https://github.com/bumptech/glide

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