Android ListView Shows Confusion problem

When using a custom ListView View, it is often used to improve slide and display efficiency by reusing the view in the ListView, but one problem is that the data in the ListView often shows confusion.

In general, the method we override is this:

Inflater = Layoutinflater.from (context); @Override public  View getView (int position, view Convertview, ViewGroup Parent) {    Viewholder holder;    if (Convertview = = null) {      Convertview = inflater.inflate (R.layout.book_item, null);      Holder = new Viewholder (convertview);      Book book = Books.get (position);      Holder.bookName.setText (Book.getname ());      Holder.bookTime.setText (Book.gettime ());      Convertview.settag (holder);    } else {      holder = (viewholder) convertview.gettag ();    }    return convertview;  }  Class Viewholder {    ImageView bookpic;    TextView BookName;    TextView Booktime;    Public Viewholder (view view) {      bookpic = (ImageView) View.findviewbyid (r.id.iv_book_pic);      BookName = (TextView) View.findviewbyid (r.id.tv_book_name);      Booktime = (TextView) View.findviewbyid (r.id.tv_book_time);    }  }

This usually causes the list to show confusion because we do not reload the data when we reuse the view but convertview! = null, as in this form the data is reloaded:

@Override public  View getView (int position, view Convertview, ViewGroup parent) {    Viewholder holder;    if (Convertview = = null) {      Convertview = inflater.inflate (R.layout.book_item, null);      Holder = new Viewholder (convertview);      Convertview.settag (holder);    } else {      holder = (viewholder) convertview.gettag ();    }    Book book = Books.get (position);//Reset Data    Holder.bookName.setText (Book.getname ()) regardless of whether the view is reused;    Holder.bookTime.setText (Book.gettime ());    return convertview;  }

Android ListView Shows Confusion problem