ListView Display in Android and its optimization benefits

Display effect:

The middle item entry is able to swipe up and down.

Code implementation:

1 @Override2          PublicView GetView (intposition, View Convertview, ViewGroup parent) {3 4 Viewholder Holder;5             if(Convertview = =NULL) {6Convertview = View.inflate (cleancacheactivity. This,7R.layout.list_item_cacheinfo,NULL);8Holder =NewViewholder ();9 TenHolder.tvname =(TextView) Convertview One . Findviewbyid (r.id.tv_name); AHolder.tvcache =(TextView) Convertview - . Findviewbyid (R.id.tv_cache); -Holder.ivicon =(ImageView) Convertview the . Findviewbyid (R.id.iv_icon); -Holder.ivclean =(ImageView) Convertview - . Findviewbyid (R.id.iv_clean); -  + Convertview.settag (holder); -}Else { +Holder =(Viewholder) Convertview.gettag (); A             } at             FinalCacheinfo info =GetItem (position); - Holder.tvName.setText (info.name); -Holder.ivIcon.setImageDrawable (Info.icon);
26//...
Convertview return;
28}

1     //ListView Property Encapsulation2     classViewholder {3          PublicTextView Tvname;4          PublicTextView Tvcache;5          PublicImageView Ivicon;6          PublicImageView Ivclean;7     }8 9     //Cache Information EncapsulationTen     classCacheinfo { One          PublicString name; A          PublicString PackageName; -          Publicdrawable icon; -          Public LongcacheSize; the}

Optimization Features:

1.

Reduce the number of Findviewbyid

2.

Reduce the number of objects created (Holder = new viewholder ();)

3.

achieve paging load, save consumption.

ListView Display in Android and its optimization benefits