Hi forandroid, I guess you're talking about the class TwoLineListItem [1], right? Out of curiosity, not because I am trying to be a smart ass: Why would this be faster?
Cheers, Mariano [1] http://developer.android.com/reference/android/widget/TwoLineListItem.html On Wed, Jan 14, 2009 at 10:51 AM, for android <[email protected]> wrote: > use the efficient list adapter > > And also you can use the TwoLineListitem.... > > > On Wed, Jan 14, 2009 at 2:23 PM, Mariano Kamp <[email protected]>wrote: > >> *bump* ;-) >> >> >> On Sun, Jan 11, 2009 at 7:10 PM, Mariano Kamp <[email protected]>wrote: >> >>> Hi, >>> I have a performance problem in a ListView. The problem seems to be >>> that it takes too long to setup each individual row. It scrolls very, very >>> painfully slow, because of that. >>> >>> The actual code renders an Entry differently depending on the read >>> state and if it is changed. When not using this code and just plainly called >>> setText() on the TextViews it is reasonable fast. Also the content is HTML. >>> >>> Am I doing something terribly wrong here? >>> >>> >>> <?xml version="1.0" encoding="utf-8"?> >>> <RelativeLayout xmlns:android=" >>> http://schemas.android.com/apk/res/android"; >>> android:layout_width="fill_parent" android:layout_height="wrap_content" >>> > >>> >>> <TextView android:id="@+id/feed_title" android:layout_width= >>> "fill_parent" >>> android:layout_height="wrap_content" android:textSize="11sp" >>> android:paddingTop="3px" /> >>> <TextView android:id="@+id/entry_title" android:layout_width= >>> "fill_parent" >>> android:layout_height="wrap_content" android:layout_below= >>> "@id/feed_title" >>> android:textSize="15sp" android:paddingBottom="3px" /> >>> </RelativeLayout> >>> >>> class EntryListAdapter extends BaseAdapter { >>> >>> [..] >>> >>> public View getView(int position, View convertView, ViewGroup parent) { >>> View rowView = convertView != null ? convertView : activity >>> .findViewById(R.layout.entry_row); >>> >>> if (rowView == null) >>> rowView = inflater.inflate(R.layout.entry_row, parent, false); >>> >>> Entry entry = entries.get(position); >>> --> slow version >>> EntryViewHelper.populateEntryView(rowView, entry); >>> <-- >>> -- OR -- >>> --> (somewhat) fast version >>> TextView entryTitleView = (TextView) rowView.findViewById(R.id. >>> entry_title); >>> TextView feedTitleView = (TextView) rowView.findViewById(R.id. >>> feed_title); >>> >>> >>> feedTitleView.setText(entry.getFeedTitle()); >>> entryTitleView.setText(entry.getTitle()); >>> <-- >>> return rowView; >>> } >>> } >>> >>> class EntryViewHelper { >>> [..] >>> >>> static void populateEntryView(View view, Entry entry) { >>> >>> TextView entryTitleView = (TextView) view >>> .findViewById(R.id.entry_title); >>> TextView feedTitleView = (TextView) view.findViewById(R.id.feed_title); >>> >>> feedTitleView.setText(U.renderTitleToSpannedString( >>> entry.getFeedTitle(), entry.getFeedTitleType())); >>> entryTitleView.setText(U.renderTitleToSpannedString(entry.getTitle(), >>> entry.getTitleType())); >>> >>> int style = Typeface.NORMAL; >>> if (!entry.isRead()) >>> style |= Typeface.BOLD; >>> if (entry.isReadStatePending()) >>> style |= Typeface.ITALIC; >>> >>> entryTitleView.setText(U.renderTitleToSpannedString(entry.getTitle(), >>> entry >>> .getTitleType())); >>> feedTitleView.setText(U.renderTitleToSpannedString( >>> entry.getFeedTitle(), entry.getFeedTitleType())); >>> >>> entryTitleView.setTypeface(Typeface.DEFAULT, style); >>> } >>> } >>> >>> .. >>> import android.text.Html; >>> import android.text.Spanned; >>> import android.text.SpannedString; >>> .. >>> class U { >>> static Spanned renderTitleToSpannedString(String titleString, >>> String titleType) { >>> Spanned title = null; >>> if ("html".equals(titleType) || "xhtml".equals(titleType)) >>> title = Html.fromHtml(titleString); >>> else >>> title = new SpannedString(titleString); >>> return title; >>> } >>> } >>> >>> Btw. I re-use the convert view etc. The performance degradation only >>> happens when I style the output. >>> >>> Cheers, >>> Mariano >>> >> >> >> >> > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
