Re: [mono-android] cant get my head around progress bar

[John Murray]

Many tx SRI

I solved it by putting the code into it's own method 
Viz 
Whilst this does not work (code in eventhandler ) 
t1.Text = "loading";
>
>                      ThreadPool.QueueUserWorkItem(o
> =>WXclass5.getwindmap(ds, WXclass5.altsel.ToString()));
>
>                 t1.Text = "";

This does work 
            ThreadPool.QueueUserWorkItem(o => progbarMethod(ds));  //called
from click eventhandler

//Then 
   private void probarMethod(string ds)
     {
         
         WXclass5.getwindmap2(this,ds);
       RunOnUiThread( () =>t1.Text = WXclass5.getaltstring());
       RunOnUiThread( () =>i1.SetImageBitmap(WXclass5.windmap));
         RunOnUiThread( () =>pb.Visibility=ViewStates.Invisible);
     }  
        




-----Original Message-----
From: SRI [mailto:sri...@gmail.com] 
Sent: 18 September 2011 12:25
To: j...@murray.gb.com; Discussions related to Mono for Android
Subject: Re: [mono-android] cant get my head around progress bar

Hi
         Problem 1 : Showing a Progress Bar

         I am doing everything programatically You can also use axml to do
this.

         Declare the folowing globally in your activity.

         static bool showActivity =false;
         ProgressBar _activityIndicator;
         private static System.Timers.Timer _periodicTimer ;

         In the OnCreate method or where you initialise you views do
the following

            _activityIndicator = new ProgressBar(this);
            _activityIndicator.Visibility = ViewStates.Invisible;
            RelativeLayout.LayoutParams
activityProgressAnimationParams = new RelativeLayout.LayoutParams(100,
100);
 
activityProgressAnimationParams.AddRule(LayoutRules.CenterHorizontal);
 
activityProgressAnimationParams.AddRule(LayoutRules.CenterVertical);
            [relativeLayout].AddView(_activityIndicator,
activityProgressAnimationParams);

            I am adding this to a RelativeLayout View. You may need to
adjust this to what ever is
            your main Layout.

            Alternative if you have declared this in axml, you can do
the following,

           _activityIndicator =
FindViewById<ProgressBar>(Resource.Id.progressBar)

            Also initialise the Periodic Timer
             _periodicTimer = = new System.Timers.Timer();
             _periodicTimer.Elapsed += new
ElapsedEventHandler(PeriodicTimer_Tick);
            _periodicTimer.Interval = 500;

          Declare the Period Timer Event Handler
        private void PeriodicTimer_Tick(object sender, ElapsedEventArgs e)
        {


        }






On Sat, Sep 17, 2011 at 6:32 PM, John Murray <j...@murray.gb.com> wrote:
> I’ve cracked a number of things along the learning curve of Mandroid but I
> am being really thick here
>
> I just cannot get my head around the implementation of a progress bar –
can
> some kind soul help  me with some idiot proof code?
>
>
>
> I have a static class method which fetches some meteorological diagrams
from
> a webserver and places resulting bitmap in a static  which is later
accessed
> by an imageview
>
> Takes 4 or 5 seconds but a lot longer over a GSM network therefore I want
to
> put up a progress thingy
>
>
>
> For the time being I’ve got a textview just saying loading
>
>
>
> These lines of code are called  when a user selects something  from a
> spinner
>
> Obviously this doesn’t do much
>
>  t1.Text = "loading";
>
>                      WXclass5.getwindmap(ds, WXclass5.altsel.ToString());
>
>                 t1.Text = "";
>
> but why cant I do this
>
> t1.Text = "loading";
>
>                      ThreadPool.QueueUserWorkItem(o
> =>WXclass5.getwindmap(ds, WXclass5.altsel.ToString()));
>
>                 t1.Text = "";
>
> there’s no UI code in the ‘getwindmap’ – just a webclient call and some
> bitmap/byte manipulation
>
> but implementing the threadpool.QueueWorkItem does not seem to fetch
> anything or do anything – I can’t seem to debug into it to see what’s
> happening (is there a special method of debugging on separate threads?
>
>
>
> With regards to implementing the progress bar instead of text saying
loading
>  I presume I just replace the text.t1 with a progressbar  -and set it
>  visible  before the threadpoolqueue and non-visible after?
>
>
>
> I suspect it is not that simple
>
>
>
> Sorry to seem so  stupid but I’ve read all the android stuff on
progressbars
> and I’ve developed a complete mental block – the more I read the less I
> understand.
>
> Can someone please explain in baby language please?
>
>
>
>
>
> _______________________________________________
> Monodroid mailing list
> Monodroid@lists.ximian.com
>
> UNSUBSCRIBE INFORMATION:
> http://lists.ximian.com/mailman/listinfo/monodroid
>
>



-- 
Sridharan Srinivasan
Alias Sri
Ph:(65)98255785/(65)63922439
www.arshu.com

_______________________________________________
Monodroid mailing list
Monodroid@lists.ximian.com

UNSUBSCRIBE INFORMATION:
http://lists.ximian.com/mailman/listinfo/monodroid