While loading the images from net you can do a lazy load. One of the sample is http://open-pim.com/tmp/LazyList.zip Good sample on how to display the list and then load images. But you would have to customize it to your needs.
On Thu, Dec 23, 2010 at 3:00 PM, Kostya Vasilyev <[email protected]> wrote: > Johannes, > > Take a look at code in your onCreate, to see what's taking too long. > > Add logging statements at entry to onCreate and after each step of the work > it does. > > Another reason could be that you kick off a thread in onCreate, and that > thread does a lot of processing right away - using too much of the CPU, thus > slowing down the main thread. > > To test this theory, add a delay for a few seconds at the beginning of the > thread's work function (call Thread.sleep or wait), and see if it makes a > difference. > > -- Kostya > > 23.12.2010 12:14, Johannes De Smedt пишет: > > I have an application that loads a list of items with thumbnails from >> a server, and shows those items in a ListView. >> >> The laoding of the data is done before the ListViewActivity is started >> and while that is being done, a ProgressDialog is shown. When the >> loading of the data is done, I start an activity with a ListView that >> displays the items. The thumbnails are downloaded in a seperate thread >> when they are needed in the getView method of ListView. >> >> This is my problem: When the loading of the data is done, I call >> startActivity with an Intent to start the ListActivity and in that >> intent I put the data. >> My problem is that this takes a few seconds sometimes. How can I speed >> this up? >> >> Below is the sequence + where it goes wrong: >> >> The items are downloaded with an AsyncTask that shows a >> ProgressDialog. >> The progressDialog is dissmissed, and startactivity is called. >> >> Intent in = new Intent(CategoryListScreen.this, >> VideoListScreen.class); >> in.putParcelableArrayListExtra("items", items); >> startActivity(in); >> >> The listAdapter is created in the onCreate method of my >> VideoListScreen >> getView is called a few times... >> The VideoListScreen is displayed (a few seconds after the >> progressDialog has been dissmissed) >> >> Also the Logcat output from the ActivityManager indicates it takes a >> few seconds for my activity to start: >> E.g: >> 10:13:22.254 - ActivityManager - Starting activity: VideoListScreen >> 10:13:25.424 - ActivityManager - Displayed activity: VideoListScreen: >> 3166 ms >> >> How can I make that the activity is displayed faster? >> >> > > -- > Kostya Vasilyev -- WiFi Manager + pretty widget -- > http://kmansoft.wordpress.com > > > -- > 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]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- 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
