Android Question How solv receiver type from JavaObject

[pcicom]

Hi

How solv receiver type from JavaObject

my code is

    Dim scan As JavaObject
    '**************************************   
'    scan.InitializeStatic("android.device.ScanManager")
    scan.InitializeNewInstance("android.device.ScanManager",Null)
    
    Dim joOpen As JavaObject
    Dim lOpen As Boolean
    joOpen = scan.RunMethodJO("openScanner",Null)
    lOpen = joOpen.as(Boolean)

the response of compiled is

java.lang.IllegalArgumentException: Expected receiver of type android.device.ScanManager, but got java.lang.Class<android.device.ScanManager>


tanks

 

[aeric]

scan.RunMethodJO

How about?

scan.RunMethod()

 

[teddybear]

Dim joOpen As JavaObject
Dim lOpen As Boolean
joOpen = scan.RunMethodJO("openScanner",Null)
lOpen = joOpen.as(Boolean)

It seems the openScanner returns a boolean, Try lOpen= scan.RunMethodJO("openScanner",Null)

 

[pcicom]

Thanks for answering.

i use the following sdk

UBX SDK API for Android V3.1.0326

I can already print through the SDK, doing the following

    lPrinterReady = False
    Dim GetPrinter as JavaObject
   
    GetPrinter.InitializeNewInstance("android.device.PrinterManager",Null) 
   
    ob = GetPrinter.RunMethodJO("open",Null)  
    nPrinterReady = ob.As(Int)
    If nPrinterReady=0 Then
        cDummy = GetPrinter.RunMethodJO("setupPage",Array As Object(nPW,nPH)).As(String)
        cDummy = GetPrinter.RunMethodJO("clearPage",Null).As(String)
        ....
        Printing CODE..
        ....
    end if

According to the instructions of the SDK and the way in which I obtain data is identical to the one I use with the printer, but with the scanner it does not work, it shows me that error.

   scan.InitializeNewInstance("android.device.ScanManager",Null)                <--   Ok no problem
    ob = scan.RunMethodJO("openScanner",Null)                                           <-- ERROR
    nPrinterReady = ob.As(Int)

    or

    scan.RunMethodJO("openScanner",Null)                                              <-- ERROR

    or

    scan.RunMethod("openScanner",Null)                                              <-- ERROR

 

[pcicom]

It seems the openScanner returns a boolean, Try lOpen= scan.RunMethodJO("openScanner",Null)

Yes I already did but it doesn't work

What the error message says is that the expected result is different from the returned type


java.lang.IllegalArgumentException: Expected receiver of type android.device.ScanManager, but got java.lang.Class<android.device.ScanManager>

 

[aeric]

Can it be the device is not supported? Is it a barcode scanner?

 

[stevel05]

java.lang.IllegalArgumentException:

Usually means that an argument passed to a method is of the wrong type, but I can't see why that would apply here. Can you copy and paste the whole error message from the log?

 

[pcicom]

Usually means that an argument passed to a method is of the wrong type, but I can't see why that would apply here. Can you copy and paste the whole error message from the log?

Hi, tanks for you support



ERROR 1: scan.InitializeNewInstance("android.device.ScanManager",Null)

ERROR 2: scan.InitializeStatic("android.device.ScanManager")

 

[aeric]

' scan.InitializeStatic("android.device.ScanManager")
scan.InitializeNewInstance("android.device.ScanManager",Null)

What happen if you use scan.InitializeStatic ?

Edit: Ops, you tried it in second image.

Dim joOpen As JavaObject = scan.RunMethod("openScanner", Null)

 

[agraham]

The second error is expected as openScanner is an instance, not a class,method. However I don't understand the first error as the code looks OK to me. Are you missing a permission?

 

[pcicom]

On SDK say

UBX SDK API for Android V3.1.0326

openScanner​

public boolean openScanner()
Turn on the power for the barcode reader.


Parameters:
none

Returns:
True if successful, false if failed.

Example:

ScanManager mScanManager = new ScanManager();
boolean ret = mScanManager.openScanner();
if(ret) {
//open successful
}

 

[stevel05]

This may be relevant: https://www.b4x.com/android/forum/threads/error-java-lang-runtimeexception-stub.138797/#content

 

[pcicom]

This may be relevant: https://www.b4x.com/android/forum/threads/error-java-lang-runtimeexception-stub.138797/#content

Thanks Steve.

I also tried like this.