Android Question code modules, activities and scopes

[sorex]

Hello,

Since the switching between activities is rather slow I was thinking of going for code modules to have my code seperated as much as possible and work with swappable panels instead.

I remember from a previous project that code modules behave different so I have a few questions about them.

As my main activity can't be used with commands like main.addview() I tried to pass the activity to the sub and store it in a variable so that it's reachable from the other sub in the code module aswell without the need to pass it to all subs.

Dim dst As Activity

Sub downloaddata(dstact)
dst=dstact
End Sub

but then I get "Can not access activity from sub"

is there a way to add view to my "Main" activity from in a code module?

or do I have to call a sub in my main activity just for the view adding?

 

[klaus]

main.addview() ?
In Main it should be Activity.AddView()

Your sub declaration should be Sub downloaddata(dstact As Activity)
To pass the current activity to the routine use ModuleName.downloaddata(Me.

 

[sorex]

I know, but as I can access variables with Main.variable name I hoped that Main.addview would work aswell.

if I want to store that parameter so that other subs know the activity aswell what type do I need? Activity or Object?

Dim dst As Activity in the globals still gives that "Can not access activity from sub" error

 

[Erel]

You can pass an activity to a code module sub and then add a view to it. However you cannot store an activity in a process global variable as it will cause a memory leak.

You can use a class instead.

 

[sorex]

I was affraid to get this answer.

If I call a sub in my main activity will the scope still be the code module or is the scope where the "remote" sub is located?

 

[Erel]

Note that that I understand. A code module is just a set of subs. The context of a code module sub is the context of the calling module (note that this is not the case in B4J).

 

[sorex]

another weird issue.

in my code module I have this

Sub downloaddata()
Log("download file")
Main.dljob.Initialize("update","Main")
Main.dljob.Download("http://someurl")
End Sub

when I place the job done sub in Main it works right.

when I change the code to

dljob.Initialize("update","maindata")  'maindata = codemodulename
dljob.Download("http://someurl")

and place the jobdone inside the codemodule the app crashes.


Is this another limitation or did I do something wrong?

 

[sorex]

Klaus,

When I use

Sub getcontent(act As Activity,img As View)

and

  maindata.getcontent(Me,imgLogo)

as call I get compile errors...

maindata.getcontent(Me,imgLogo)
javac 1.7.0_07
src\xxx\com\main.java:470: error: inconvertible types
mostCurrent._maindata._getcontent(mostCurrent.activityBA,(anywheresoftware.b4a.objects.ActivityWrapper) anywheresoftware.b4a.AbsObjectWrapper.ConvertToWrapper(new anywheresoftware.b4a.objects.ActivityWrapper(), (anywheresoftware.b4a.BALayout)(main.getObject())),(anywheresoftware.b4a.objects.ConcreteViewWrapper) anywheresoftware.b4a.AbsObjectWrapper.ConvertToWrapper(new anywheresoftware.b4a.objects.ConcreteViewWrapper(), (android.view.View)(mostCurrent._imglogo.getObject())));
^
required: BALayout
found: Class<CAP#1>
where CAP#1 is a fresh type-variable:
CAP#1 extends Object from capture of ?

I started to happen when I added the activity parameter.

 

[klaus]

Sorry, my error .
It should simply be:

Sub getcontent(img As View)

In my example Me means the calling module and not the activity !

 

[thedesolatesoul]

I think you should use a class instead of a code module.

The fact is that what you are refactoring is all going to be executed in the context of the activity. (I hardly ever need to use code modules anymore).

 

[sorex]

I forgot to say that (img) is a view where the placement of the new buttons depends on.

So I still need an addview to the activity there aswell.

How would I reference to the main activity when ME ain't right?

The "problem code" is below...

For i = 0 To content.Size - 1
rowmap = content.Get(i)
btnMenu.Initialize("menubutton")
Main.AddView(btnMenu,0,0,0,0)    ' <- I need this to work
btnMenu.Width=bw
btnMenu.Height=bh
btnMenu.Left=(100%x-bw)/2
btnMenu.Top=(img.Top+img.Height)+20+(bh*i)
btnMenu.Text=rowmap.Get("cName")
btnMenu.Tag=rowmap.Get("cName")
Next

 

[thedesolatesoul]

maindata.getcontent(Me,imgLogo) >> maindata.getcontent(Activity,imgLogo)

 

[sorex]

you hit the nail on the head TDS, thanks!

 

[Dirceu Renato Macan]

This code ( maindata.getcontent(Activity,imgLogo) ) is not currently running.
Is there another way to solve this problem?

 

[sorex]

did you rename it to your own class & sub names ?