Android Question Seekbar

Erel

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• Nov 3, 2015

• #2

Use CallSub or CallSubDelayed to call a sub in the Activity that will change the value.

 

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Arturs

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• Nov 3, 2015

• #3

I thought that I should use it.

CallSubDelayed needs the following parameters:Component as Object, Sub As String

My Sub is
Sub Seek_ValueChanged (Value As Int, UserChanged As Boolean)

How to pass parameters: Value and UserChanged ?

something I do not understand

 

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DonManfred

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• Nov 3, 2015

• #4

Create a sub in your Activity. for example in MAIN

B4X:

sub SetSeekbarValue(value As int)
  myseekbarname.value = value
end sub

And then from your Service

B4X:

CallSubDelayed2(Main,"SetSeekbarValue",Array as int(16))

 

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Arturs

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• Nov 3, 2015

• #5

I have the error : "java.lang.IllegalArgumentException: argument 1 should have type int, got int[]"

in the line myseekbarname.value = value

 

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DonManfred

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• Nov 3, 2015

• #6

try not using an array

B4X:

CallSubDelayed2(Main,"SetSeekbarValue",16)

 

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Arturs

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• Nov 3, 2015

• #7

It works and simple to use

I thought that I cannot pass int value because CallSubDelayed2 expects Object type.

Could you explain me why we can use Int ?


CallSubDelayed2 (Component As Object, Sub As String, Argument As Object)

 

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DonManfred

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• Nov 3, 2015

• #8

int, long, String, double... ALL of them are Objects

 

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Erel

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• Nov 4, 2015

• #9

As @DonManfred wrote primitive types can be treated as objects (it is called auto-boxing).

 

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