Android Question problem calling a JavaObject methode

Kronberger Reinhard · Sunday at 1:46 PM

Hello,
i want to show on a sunmi D3 Mini device the price on the 7 digits customerdisplay.
The sunmi developer documtents show that the method showDigital(String digital) from LcdApi do this.

I have tried different things in my b4a project but always with errors.

Attched the sunmisdk.jar which i have included and copied to the \Anywhere Software\B4A\Libraries folder.

the method calling with error

any idea what i have done wrong?

thanks

Pendrush · Sunday at 1:52 PM

You should post error as text.
Most important line missing part of text on your screenshot.

Kronberger Reinhard · Sunday at 2:00 PM

the method which i am calling.

Sub ShowPriceSunmiD3(Price As Double)
Dim jo As JavaObject
jo.InitializeStatic("com.sunmi.printerx.api.LcdApi").RunMethod("showDigital", Array(NumberFormat2(Price, 1, 2, 2, False)))
End Sub

Including the jar

#Region Project Attributes
#ApplicationLabel: EASY_POS
#VersionCode: 40
#VersionName: Easy-Pos131224
'SupportedOrientations possible values: unspecified, landscape or portrait.
#SupportedOrientations: landscape
#CanInstallToExternalStorage: False
#End Region
#AdditionalJar: sunmisdk

The Errormessage

Error occurred on line: 956 (Main)
java.lang.IllegalArgumentException: Expected receiver of type com.sunmi.printerx.api.LcdApi, but got java.lang.Class<com.sunmi.printerx.api.LcdApi>
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:132)
at anywheresoftware.b4j.object.JavaObject.RunMethodJO(JavaObject.java:139)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:777)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:354)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
at kro4pro.software.easy_pos_neu.main._betraganzeigen(main.java:8949)
at kro4pro.software.easy_pos_neu.main._artikelbuttonclick(main.java:8672)
at kro4pro.software.easy_pos_neu.main._b2_click(main.java:9872)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7506)
at android.view.View.performClickInternal(View.java:7483)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:29345)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7935)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)

Daestrum · Sunday at 4:00 PM

In the IDE screenshot you are calling RunMethodJO not RunMethod. That would pass an Object and not a value.

teddybear · Sunday at 4:02 PM

Kronberger Reinhard said:
Sub ShowPriceSunmiD3(Price As Double)
Dim jo As JavaObject
jo.InitializeStatic("com.sunmi.printerx.api.LcdApi").RunMethod("showDigital", Array(NumberFormat2(Price, 1, 2, 2, False)))
End Sub

Try this code

B4X:

    Dim jo As JavaObject
    jo.InitializeNewInstance("com.sunmi.printerx.api.LcdApi",Null).RunMethod("showDigital", Array(NumberFormat2(Price, 1, 2, 2, False)))

Erel · Sunday at 4:03 PM

RunMethodJO is not the problem. It simply returns a JavaObject and allows method chaining.

@teddybear was faster. The error means that you are calling an instance method, not a static method. You need to have an instance.

Kronberger Reinhard · Sunday at 4:25 PM

teddybear said:

Try this code

B4X:

    Dim jo As JavaObject
    jo.InitializeNewInstance("com.sunmi.printerx.api.LcdApi",Null).RunMethod("showDigital", Array(NumberFormat2(Price, 1, 2, 2, False)))

Get

Error occurred on line: 956 (Main)
java.lang.InstantiationException: java.lang.Class<com.sunmi.printerx.api.LcdApi> cannot be instantiated
at java.lang.Class.newInstance(Native Method)
at anywheresoftware.b4j.object.JavaObject.InitializeNewInstance(JavaObject.java:86)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
at kro4pro.software.easy_pos_neu.main._showpricesunmid3(main.java:10699)
at kro4pro.software.easy_pos_neu.main._betraganzeigen(main.java:8992)
at kro4pro.software.easy_pos_neu.main._artikelbuttonclick(main.java:8672)
at kro4pro.software.easy_pos_neu.main._b1_click(main.java:9477)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7506)
at android.view.View.performClickInternal(View.java:7483)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:29345)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7935)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)

drgottjr · 2025-01-13T01:11:20+0000

com.sunmi.printerx.api.LcdApi isn't a class; it's an interface. something else has to implement the showdigital() method.

Erel · 2025-01-13T05:55:12+0000

You need to provide the relevant Java code snippet.

It should be something like:

B4X:

Dim PrinterSdk As JavaObject
PrinterSdk = PrinderSdk.InitializeStatic("com.sunmi.printerx.PrinterSdk").RunMethod("getInstance", Null)
Dim ctxt As JavaObject
ctxt.InitializeContext
Dim Listener As Object = PrinterSdk.CreateEventFromUI("com.sunmi.printerx.PrinterSdk$PrintListen", "PrinterListener", Null)
PrinterSdk.RunMethod("getPrinter", Array(ctxt, Listener))


Private Sub Listen_Event(MethodName As String, Args() As Object) As Object

  Log(MethodName & ", " & Args)
  Return Null
End Sub

You will get the printer object in the event.

Kronberger Reinhard · 2025-01-13T10:08:04+0000

drgottjr said:
com.sunmi.printerx.api.LcdApi isn't a class; it's an interface. something else has to implement the showdigital() method.

yes i think so because it has a link to the source in the LcdApi but it is named LcdApi.class .Unfortunately it is very hard to get good informations from sunmi.thanks

teddybear · 2025-01-13T16:08:13+0000

Kronberger Reinhard said:
yes i think so because it has a link to the source in the LcdApi but it is named LcdApi.class .Unfortunately it is very hard to get good informations from sunmi.thanks

Erel has already provided you with a solution in the post#9, I have not the device, so I got the error com.sunmi.printerx.SdkException: Not found print service,
as long as you get the PrinterSdk.Printer object, you can use the lcdApi to showDigital.
This is the SDK documentation
Java code snippet looks like this:

Java:

               PrinterSdk.Printer Printer;
                try {
                    LcdApi api = Printer.lcdApi();
                    api.showDigital("1.3.5.7.9.0.1");
                } catch (SdkException e) {
                    e.printStackTrace();
                }

Kronberger Reinhard · 2025-01-14T11:16:40+0000

Error occurred on line: 963 (Main)
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:132)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:777)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:354)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
at kro4pro.software.easy_pos_neu.main._showpricesunmid3(main.java:10699)
at kro4pro.software.easy_pos_neu.main._betraganzeigen(main.java:8992)
at kro4pro.software.easy_pos_neu.main._artikelbuttonclick(main.java:8672)
at kro4pro.software.easy_pos_neu.main._b2_click(main.java:9873)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7506)
at android.view.View.performClickInternal(View.java:7483)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:29345)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7935)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
Caused by: com.sunmi.printerx.SdkException: Not found print service
at com.sunmi.printerx.PrinterSdk.connectService(PrinterSdk.java:23)
at com.sunmi.printerx.PrinterSdk.getPrinter(PrinterSdk.java:8)
... 35 more

Erel said:

You need to provide the relevant Java code snippet.

It should be something like:

B4X:

Dim PrinterSdk As JavaObject
PrinterSdk = PrinderSdk.InitializeStatic("com.sunmi.printerx.PrinterSdk").RunMethod("getInstance", Null)
Dim ctxt As JavaObject
ctxt.InitializeContext
Dim Listener As Object = PrinterSdk.CreateEventFromUI("com.sunmi.printerx.PrinterSdk$PrintListen", "PrinterListener", Null)
PrinterSdk.RunMethod("getPrinter", Array(ctxt, Listener))


Private Sub Listen_Event(MethodName As String, Args() As Object) As Object

  Log(MethodName & ", " & Args)
  Return Null
End Sub

You will get the printer object in the event.

get this

Error occurred on line: 963 (Main)
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:132)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:777)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:354)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
at kro4pro.software.easy_pos_neu.main._showpricesunmid3(main.java:10699)
at kro4pro.software.easy_pos_neu.main._betraganzeigen(main.java:8992)
at kro4pro.software.easy_pos_neu.main._artikelbuttonclick(main.java:8672)
at kro4pro.software.easy_pos_neu.main._b2_click(main.java:9873)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:7506)
at android.view.View.performClickInternal(View.java:7483)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:29345)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7935)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
Caused by: com.sunmi.printerx.SdkException: Not found print service
at com.sunmi.printerx.PrinterSdk.connectService(PrinterSdk.java:23)
at com.sunmi.printerx.PrinterSdk.getPrinter(PrinterSdk.java:8)
... 35 more

teddybear · 2025-01-14T12:22:36+0000

I have compiled the demo of sunmi sdk.
Download the sample-debug.apk and install it on the D3 Mini device , see if it works

Android Question problem calling a JavaObject methode

Kronberger Reinhard

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Pendrush

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Daestrum

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teddybear

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Erel

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Kronberger Reinhard

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drgottjr

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Erel

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Kronberger Reinhard

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teddybear

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Kronberger Reinhard

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teddybear

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