ADF Mobile : task-flow navigation takes at least 500 milliseconds

hi
While navigating the CompGallery sample application [1] I noticed that navigation between (what looks like) simple pages/views was rather slow.
Surely, this can be caused by different things (possibly the device, the app implementation, the framework, ...).
To review this, I tried to build a simple example application using JDeveloper 11.1.2.3.0
at http://www.consideringred.com/files/oracle/2012/NavigationTimeMApp-v0.01.zip
and as APK at http://www.consideringred.com/files/oracle/2012/navigationtimemapp-v0.01.apk
It has a bounded task-flow with two views that allow to navigate to each other.
see the screenshot at http://www.consideringred.com/files/oracle/img/2012/navigationtimemapp-20121025.png
It has a simple TimerBean that allows to get an idea about how much time navigation requires:
public class TimerBean
     protected long fStartTimerMillis = 0;
     public void startTimer(ActionEvent pActionEvent)
          fStartTimerMillis = System.currentTimeMillis();
     public String getTimerInfo()
          if (fStartTimerMillis == 0)
               return "no timer info yet";
          long vMillisAgo = System.currentTimeMillis() - fStartTimerMillis;
          return "timer started " + vMillisAgo + " milliseconds ago";
}It allows for the following scenario (sc1):
- (sc1-a) start the app
- (sc1-b) click the "do goSecondView using a_TimerBean" button, which will navigate to "secondView" showing something like "timer started 621 milliseconds ago"
- (sc1-c) click the "do goFirstView using a_TimerBean" button, which will navigate to "firstView" showing something like "timer started 537 milliseconds ago"
- (sc1-d) if you care to stop the app, try a "Force stop" on the "App info" via "Apps" in the Android settings
On my HTC Sensation Z710e I always get at least 500 milliseconds for each navigation.
questions:
- (q1) Anyone who wants to try scenario (sc1) and share his observed navigation times?
- (q2) Which navigation times can be expected for simple navigation in ADF Mobile apps (like in scenario (sc1))?
- [1] http://docs.oracle.com/cd/E35521_01/doc.111230/e24475/demoapps.htm#BACGDHDJ
many thanks
Jan Vervecken

Thanks for your reply Joe Huang.
Joe Huang wrote:
... Did you change CVM logging settings? ...I have not changed any defaults. If I unzip "navigationtimemapp-v0.01.apk", I find:
- assets\storage\jvm\lib\cvm.properties having things like "java.debug.enabled=false" and "javascript.debug.enabled=false"
- assets\storage\jvm\lib\logging.properties having only "level=SEVERE" configurations
If you refer to something else, please specify.
- Did you deploy the application in release mode vs. debug mode in the deployment profile? You would want to deploy it in release mode.Looks like the default is debug, which I have used for "navigationtimemapp-v0.01.apk".
So, I configured on the Android Options the Build Mode as "Release" in the modified example application
at http://www.consideringred.com/files/oracle/2012/NavigationTimeMApp-v0.02.zip
and as APK at http://www.consideringred.com/files/oracle/2012/navigationtimemapp-v0.02.apk (now only 8 MB instead of 20 MB)
But, I don't see a big improvement, maybe about 50 milliseconds improvement per navigation (so, about 450 milliseconds instead of about 500 milliseconds).
... so page navigation performance (and overall UI performance) is primarily dictated by JS performance by the web engine on the device. ...How can I determine (in the app) which "JavaScript / web engine" a device uses?
At the end of the day, the actual performance of your application will be largely dictated by how you access data and the complexity of your screen. ...Sure, but I explicitly avoided those aspects here to have some kind of "base line" behaviour before introducing other complexities (that can slow things down).
regards
Jan

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Thanks for your reply Chris.
Chris Muir wrote:
a) When you say you've "used the deployment profile" I'm guessing you mean within JDeveloper and not via ojdeploy? ...That is correct.
... it seems you're doing the ADF Library generation inside JDev, not via ojdeploy via Ant correct? ...That is correct.
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... The relating bug numbers are 9340973 and 12940696. ...On My Oracle Support I have found:
- bug 9340973, "RESOURCE PALETTE FAILURE ON USING NETWORK PATHED FILE CONNECTIONS" (having "Base Bug 12940696" which does not seem to be published)
- for number 12940696 I got "No results found" (which might be an unpublished bug, or a wrong number)
So, about "I don't think these are related but let's rule them out", I think those are ruled out.
regards
Jan

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I can provide the project via email if needed.
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[Test Project Folder|https://docs.google.com/folder/d/0B5sTioNqfODuNWpfd3l3cEZfNU0/edit]

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Certainly... I've uploaded the sample application here: http://rapidshare.com/files/456317758/WebCenterTestApp.zip
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Cheers

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can we disable the browser back button by js?
help...

Hi OX,
Have a look into this Re: Any way to disable browser back button?
Regards,
Suganth.G

Navigating among task flows

From a button which is in a region on a page (and therefore belongs to a task flow based on page fragments), how can we go about calling a page which belongs to another separate task flow (this one not being based on page fragments)? Is there a declarative way to do this? Is there a programmatic way to do this? Either way, giving or pointing to existing examples would be very helpful. Thank you.

There is a declarative approach for calling a page (not a page fragment) from a button within a region using what's called a task flow "URL View" activity. It will navigate the page containing the region to the new page. Therefore, the new page will not appear within the context of the region. Here's some more information on task flow URL View activities:
A task flow URL View Activity redirects the root view port to any URL addressable resource, even from within the context of an ADF Region. Possible URL addressable resources include ADF Bounded Task Flows, View Activities in ADF Unbounded Task Flows, and addresses external to the current web application (e.g. Google Search). When the URL View Activity is executed at runtime, its corresponding URL EL expression will be evaluated to get the appropriate URL. Any parameter value EL expressions will be evaluated and their resulting values will be added to the URL. Then the client will be redirected to the corresponding URL.
A URL View Activity will redirect the client regardless of which view port the URL View Activity is executed from (root view port or an ADF Region). This differs from using a regular View Activity with a <redirect> element since the <redirect> element of View Activities is ignored within the context of an ADF Region. It is only honored if the View Activity is within the root view port.
Redirecting elsewhere within the same application will be handled similar to a back button navigation since the task flow stack will get cleaned up. Redirecting out of the web application will be handled like dereferencing a URL to a site external to the application. Therefore, a URL View Activity is not always expected to redirect the whole page. When running with in a portal environment, redirects to external URLs (e.g. www.google.com) will redirect the whole page while redirects to resources within the same web application (e.g. /context/faces/some-view) will redirect just the portlet, not the whole portal page.
When constructing a URL for use in a URL View Activity, the URL can be constructed using one of the following approaches:
* By calling ControllerContext.getLocalViewActivityURL()
* By calling ControllerContext.getGlobalViewActivityURL() passing in the target viewId
* Be a fully qualified, absolute URL
* Be a URL relative to the current view (doesn't start with a '/')

ADF Task Flow: Using Task Flow Call as Application Entry Point

In our product we have a task flow structure very similar to the Fusion Order Demo application, but we are having serious trouble reproducing the documented functionality of ADF Task Flows.
Specifically, we cannot use a task flow call as an entry point for our application, which is very important for us to achieve.
The [Developer s Guide|http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/taskflows.htm#ADFFD1634] states about the [demo application|http://www.oracle.com/technology/products/jdev/samples/fod/index.html] :
"A Fusion web application always contains an ADF unbounded task flow, which contains the entry point or points to the application. Figure 14-3 displays the diagram for the unbounded task flow from the Fusion Order Demo Application. This task flow contains the Home, *MyOrders*, *checkout*, registerUser, and updateUserInfo *view activities, which are all entry points to the application*."
"The checkout-task-flow activity in Figure 14-3 is a call to an ADF bounded task flow."
When we run the Fusion Demo Application, we are only able to use home, updateUserInfo and register as entry points.
We cannot enter the application through any of the task flow call activities (MyOrders and checkout) as the documentation suggests.
What are the reasons for this and how do we fix it, so we can use task flow call activities as application entry points?
Thanks.
Edited by: Rune Glerup on Oct 9, 2009 2:51 AM
The forum did not display the link to "Developer's Guide" because the link contained the single quote char '. Single quote char removed.

Is what you mention here the case in the Fusion Order Demo application?
If the task flow call activities cannot be used as entry points, why is it stated in the documentation?
How do we solve this, so that the task flow call activities (including parameter bindings) can be used as entry points, like the documentation suggests?

ADF Mobile : task-flow navigation takes at least 500 milliseconds

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