Comments on: Speed up your Android UI

By: jraanamo

jraanamo — Thu, 27 Jan 2011 09:24:21 +0000

Hi,

I know this is a little of the topic but has to do with ListView and performance and I know that you Roman have the answer already :)

I have a ListView that displays different views depending on what is the content of the current record in the underlying Cursor (MergeCursor actually). The layout on each row is a little complex and I would normally use ViewHolder for this.

The question is: how can I use ListView’s caching with different types of items and avoid creating a new view each time Adapter.getView is called? I tried using CursorAdapter with newView and bindView but naturally bindView may be called with a view of type that was not intended for the current cursor row.

By: dekorasyon

dekorasyon — Sun, 05 Dec 2010 02:08:24 +0000

A ListView is totally transparent for instance..

By: Nils

Nils — Mon, 06 Sep 2010 05:14:31 +0000

What kind of file is “The source code of the first example”?
I think I need it because I got:
[2010-09-06 07:00:58 - com.android.ide.eclipse.adt.internal.project.AndroidManifestParser] Parser exception for /MyProject/AndroidManifest.xml: Attribute “theme” bound to namespace “http://schemas.android.com/apk/res/android” was already specified for element “activity”.

By: Kaylee Grines

Kaylee Grines — Sat, 08 May 2010 10:47:05 +0000

Damn, awesome website. I actually came across this on Yahoo, and I am happy I did. I will definately be returning here more often. Wish I could add to the conversation and bring a bit more to the table, but am just absorbing as much info as I can at the moment. Thank You Mobile Phones Deals

By: Sebastian

Sebastian — Thu, 06 May 2010 12:06:58 +0000

Just tested the code on the Nexus One and obtained only 33fps without touch and 28fps with touch. Am I doing something wrong?

By: Federico

Federico — Tue, 05 Jan 2010 17:08:40 +0000

Hi Romain,

I tried running your WindowBackground project on my phone (Motorola Milestone running Android 2.0) and I get only 15 fps. Tried setting the minSdkVersion to 5, 4, and 3 and they all produce similar results.

I also noticed that if I create an activity with nothing but a SurfaceView, it will take on average 21ms per frame, without any actual drawing on the canvas (not even drawing a solid color).

Is this normal? Is it a bug in 2.0 that has been fixed in 2.0.1? Or is it some problem with the phone itself?

Thanks.

By: Planet Android » Blog Archive » Speed up your Android UI

Planet Android » Blog Archive » Speed up your Android UI — Mon, 10 Aug 2009 23:02:12 +0000

[...] up your Android UI Posted by Admin August – 10 – 2009 – Monday Speed up your Android UI: Romain Guy’s continues his guide to Android UI and view components, with tricks to speed up your [...]

By: Greg Tong

Greg Tong — Thu, 18 Jun 2009 18:49:33 +0000

Romain, we exchanged email privately where you told me that code you publish is licensed under Apache 2.0.

Since we want to re-use this code, can you please make the licensing explicit in your posts? You need to display the Apache 2.0 license notice.

Thanks.

By: Ddorid

Ddorid — Mon, 16 Mar 2009 08:26:06 +0000

Very useful stuf. Can you write tutorial for transparent activity ?

By: Romain Guy

Romain Guy — Sun, 08 Mar 2009 05:48:12 +0000

Hi Greg,

Glad to see it’s useful!