Programmatically change reading mode of HoneyWell scanner (Android 6)

Kast2k · July 17, 2020

Good day, dear colleagues!

I'm writing a software for QR data parsing from Honeywell CT50 (Android 6).

I'm sorry for may be big lists of code but i was simplifiying as much as possible.

Main form:

TMainForm = class(TForm)
    Label1: TLabel;
    btnSaveToStore: TButton;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    FAutomaticMode:Boolean;

    procedure ActivateScanner;
  public
    property AutomaticMode: Boolean read FAutomaticMode write FAutomaticMode;

    procedure onBarCodeCompleteThreadSwitcher;
    procedure onBarCodeFailThreadSwitcher;

    procedure ShowInformationMessage(const AText:string);
    { Public declarations }
  end;

uses
  FMX.Helpers.Android,  Androidapi.NativeActivity,  Androidapi.JNI.Widget,
  formScanTakeOnStore, PSTypes, PSVars;

procedure TMainForm.ActivateScanner;
begin
  RegisterDelphiNativeMethods;
  TJNASC.Activate;
  Log.d('Scanner ready');
end;

procedure TMainForm.btnSaveToStoreClick(Sender: TObject);
begin
  Barcode.DelayInSeconds:=2;
  frmScanTakeOnStore:=TfrmScanTakeOnStore.Create(Application);  //is it correct declaration or may be i need Free on Close?
  frmScanTakeOnStore.Show;
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  Barcode:=TBarcode.Create;
  Barcode.DelayInSeconds:=2;
  ActivateScanner; 
end;

procedure TMainForm.onBarCodeCompleteThreadSwitcher;
begin
  if AutomaticMode then
    TJNASC.Start
  else
    TJNASC.Stop;
end;

procedure TMainForm.onBarCodeFailThreadSwitcher;
begin

end;

procedure TMainForm.ShowInformationMessage(const AText: string);
begin
  CallInUiThread (
        procedure
        begin
          TJToast.JavaClass.makeText (TAndroidHelper.Context,
              StrToJCharSequence(AText), TJToast.JavaClass.LENGTH_LONG).show;
        end
  );
end;

PSTypes

unit PSTypes;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.ScrollBox,
  FMX.Memo, FMX.Controls.Presentation, FMX.StdCtrls,
  Androidapi.JNI.App,  Androidapi.JNI,  Androidapi.JNIBridge,  Androidapi.JNI.JavaTypes,
  DateUtils,  System.Character;

type
  JNativeActivitySubclass = interface;

  JNativeActivitySubclassClass = interface(JActivityClass)
  ['{361C7073-E0A2-4A0D-B5E4-8403E5214275}']
    {Methods}
    //function init: JFMXNativeActivity; cdecl;
  end;

  [JavaSignature('com/winarhi/nativeactivitysubclass/NativeActivitySubclass')]
  JNativeActivitySubclass = interface(JActivity)
  ['{7141B1C4-508D-46F3-A767-E0BFCE22C9CE}']
    {Methods}
//    procedure WA_75e_DoScan(paramBoolean :JBoolean);
    procedure WA_75e_Create_aidcManager;
    procedure WA_75e_Destroy_aidcManager;
    procedure WA_75eStart;
    procedure WA_75eStop;
  end;
  TJNativeActivitySubclass = class(TJavaGenericImport<JNativeActivitySubclassClass, JNativeActivitySubclass>)
  public
    procedure Activate;
    procedure DeActivate;
    procedure Start;
    procedure Stop;
  end;

  TBarcodeData=record
  end;

  TBarcodeResult=procedure(const BarcodeData:TBarcodeData) of object;

  TBarcode=class
  private
    FBarcodeData : TBarcodeData;
    FOnBarcodeResult : TBarcodeResult;

    procedure SetReceivedBarcodeData(const Value: string);
  public
    property OnBarcodeResult: TBarcodeResult read FOnBarcodeResult write FOnBarcodeResult;
  end;

procedure RegisterDelphiNativeMethods;

implementation

uses
  FMX.Helpers.Android,
  Androidapi.NativeActivity, PSVars, formMain;

{ TJNativeActivitySubclass }

procedure onBarCodeCompleteNative(PEnv: PJNIEnv; This: JNIObject; BarCode: JNIString); cdecl;
begin
  PSVars.Barcode.ReceivedBarcodeData := JNIStringToString(PEnv, BarCode);
  TThread.Synchronize(TThread.CurrentThread, MainForm.onBarCodeCompleteThreadSwitcher);
end;

procedure onBarCodeFailNative(PEnv: PJNIEnv; This: JNIObject; BarCode: JNIString); cdecl;
begin
  TThread.Synchronize(TThread.CurrentThread, MainForm.onBarCodeFailThreadSwitcher);
end;

procedure RegisterDelphiNativeMethods;
var
  PEnv: PJNIEnv;
  ActivityClass: JNIClass;
  NativeMethods: array[0..1] of JNINativeMethod;
begin
  Log.d('Starting the registration JNI stuff');

  PEnv := TJNIResolver.GetJNIEnv;

  Log.d('Registering interop methods');

  NativeMethods[0].Name := 'onBarCodeCompleteNative';
  NativeMethods[0].Signature := '(Ljava/lang/String;)V';
  NativeMethods[0].FnPtr := @onBarCodeCompleteNative;

  NativeMethods[1].Name := 'onBarCodeFailNative';
  NativeMethods[1].Signature := '()V';
  NativeMethods[1].FnPtr := @onBarCodeFailNative;

  ActivityClass := PEnv^.GetObjectClass(
    PEnv, PANativeActivity(System.DelphiActivity).clazz);

  PEnv^.RegisterNatives(PEnv, ActivityClass, @NativeMethods[0], 2);

  PEnv^.DeleteLocalRef(PEnv, ActivityClass);

  Log.d('Interop Methods Registered');
end;

procedure TJNativeActivitySubclass.Activate;
begin
  Wrap(PANativeActivity(System.DelphiActivity)^.clazz).WA_75e_Create_aidcManager;
end;

procedure TJNativeActivitySubclass.DeActivate;
begin
  Wrap(PANativeActivity(System.DelphiActivity)^.clazz).WA_75e_Destroy_aidcManager;
end;

procedure TJNativeActivitySubclass.Start;
begin
  Wrap(PANativeActivity(System.DelphiActivity)^.clazz).WA_75eStart;
end;

procedure TJNativeActivitySubclass.Stop;
begin
  Wrap(PANativeActivity(System.DelphiActivity)^.clazz).WA_75eStop;
end;

end.

PSVars

unit PSVars;

interface

uses
  PSTypes ;

var
  Barcode:TBarcode;
  TJNASC:TJNativeActivitySubclass;

implementation

end.

formScanTakeOnStore

unit formScanTakeOnStore;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  FMX.Controls.Presentation, FMX.StdCtrls, FMX.ScrollBox, FMX.Memo,
  Androidapi.JNI.App,  Androidapi.JNI,  Androidapi.JNIBridge,  Androidapi.JNI.JavaTypes,
  Androidapi.Helpers, FMX.DialogService, System.Rtti, FMX.Grid.Style,
  FMX.Grid, FMX.TextLayout, DateUtils, PSTypes, FMX.Objects;

type
  TfrmScanTakeOnStore = class(TForm)
    Label1: TLabel;
    btnFinish: TButton;
    Panel1: TPanel;
    Panel2: TPanel;
    Panel3: TPanel;
    btnContinuous: TButton;
    btnManual: TButton;
    Panel4: TPanel;
    lblReceived: TLabel;
    StyleBook1: TStyleBook;
    btnTable: TButton;
    lblMaterial: TLabel;
    lblBankaCounts: TLabel;
    lblTotalLeft: TLabel;
    tmrSleep: TTimer;
    rectStatus: TRectangle;
    Button1: TButton;
    procedure btnFinishClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure btnContinuousClick(Sender: TObject);
    procedure btnManualClick(Sender: TObject);
    procedure btnTableClick(Sender: TObject);
    procedure tmrSleepTimer(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    FNewDataExist:Boolean;

    BarcodeData:TBarcodeData;

    procedure OnBarcodeResult(const ABarcodeData:TBarcodeData);
    procedure CloseFrm(Sender: TObject; const AResult: TModalResult);
    procedure MaterialAddedNG(Sender: TObject; const AResult: TModalResult);
    procedure MaterialAddedOK(Sender: TObject; const AResult: TModalResult);
    procedure StopScannerAndColor(CL:Cardinal);
  public
    { Public declarations }
  end;

var
  frmScanTakeOnStore: TfrmScanTakeOnStore;

implementation

uses
  FMX.Helpers.Android,  Androidapi.NativeActivity, formScanComplete, dmData, formAgreeAction,
  formScanTakeOnStoreTable, PSVars, formMain;

{$R *.fmx}

procedure TfrmScanTakeOnStore.btnContinuousClick(Sender: TObject);
begin
  TJNASC.Start;
  btnContinuous.StyleLookup:='btnContinuousStyle1';
  btnManual.StyleLookup:='';
  MainForm.AutomaticMode:=True;
  MainForm.ShowInformationMessage('Automatic mode');
end;

procedure TfrmScanTakeOnStore.btnFinishClick(Sender: TObject);
begin
//  MainForm.SayTextToSpeech('Stop data reading process and exit?');
  TDialogService.MessageDialog(
    'Stop data reading process and exit?',
    TMsgDlgType.mtWarning,
    [TMsgDlgBtn.mbYes, TMsgDlgBtn.mbNo],
    TMsgDlgBtn.mbNo,
    0,
    CloseFrm);
end;

procedure TfrmScanTakeOnStore.btnManualClick(Sender: TObject);
begin
  TJNASC.Stop;
  btnManual.StyleLookup:='btnContinuousStyle1';
  btnContinuous.StyleLookup:='';
  MainForm.AutomaticMode:=False;
end;

procedure TfrmScanTakeOnStore.btnTableClick(Sender: TObject);
begin
  CallInUIThread(procedure begin
    frmScanTakeOnStoreTable:=TfrmScanTakeOnStoreTable.Create(Application); //Free ???
    frmScanTakeOnStoreTable.Show;
  end);
end;

procedure TfrmScanTakeOnStore.Button1Click(Sender: TObject); //simulation
var
  bc: TBarcodeData;
begin
  bc.Parsed:=True;
  bc.KPJCode:='80604358';
  bc.LotName:='testlot';
  OnBarcodeResult(bc);
end;

procedure TfrmScanTakeOnStore.CloseFrm(Sender: TObject; const AResult: TModalResult);
begin
  if AResult = mrYes then
    begin
      TJNASC.Stop;
      MainForm.AutomaticMode:=False;
      Close;
    end;
end;

procedure TfrmScanTakeOnStore.FormShow(Sender: TObject);
begin
  Log.d('Pre-activate');
  tmrSleep.Interval:=Barcode.DelayInSeconds*1000;

  Barcode.LastScanTimeUnix:=DateTimeToUnix(Now);
  Barcode.OnBarcodeResult:=OnBarcodeResult;
end;

procedure TfrmScanTakeOnStore.MaterialAddedNG(Sender: TObject;
  const AResult: TModalResult);
begin
  if AResult = mrYes then
    begin
      ///NG result parse
    end;
end;

procedure TfrmScanTakeOnStore.MaterialAddedOK(Sender: TObject;
  const AResult: TModalResult);
begin

end;

procedure TfrmScanTakeOnStore.OnBarcodeResult(const ABarcodeData: TBarcodeData);
begin
  if ABarcodeData.Parsed then
    begin
      StopScannerAndColor(TAlphaColors.Green);
    end
  else
    begin
      MainForm.ShowInformationMessage(ARNBarCode+' not recognized.');
      StopScannerAndColor(TAlphaColors.Red);
    end;
end;

procedure TfrmScanTakeOnStore.StopScannerAndColor(CL: Cardinal);
begin
  rectStatus.Fill.Color:=CL;
  TJNASC.Stop;
  TJNASC.DeActivate;
  Log.d('Scanner DeActivate');
  tmrSleep.Enabled:=True;
end;

procedure TfrmScanTakeOnStore.tmrSleepTimer(Sender: TObject);
begin
  TJNASC.Activate;
  Log.d('Scanner ready');
  if MainForm.AutomaticMode then
    begin
      MainForm.ShowInformationMessage('Starting scanner');

////NG
      {frmScanTakeOnStore.btnManual.OnClick(frmScanTakeOnStore.btnManual);
      Sleep(1000);
      frmScanTakeOnStore.btnContinuous.OnClick(frmScanTakeOnStore.btnContinuous);}
////NG
      {TJNASC.Stop;
      MainForm.AutomaticMode:=False;
      TJNASC.Start;
      MainForm.AutomaticMode:=True;}

      MainForm.ShowInformationMessage('Automatic mode');
    end;
  rectStatus.Fill.Color:=StrToInt('$FFE0E0E0');
  tmrSleep.Enabled:=False;
end;

end.

So after mainform show Honeywell is activated and possible to read QRs

After that i'm opening "frmScanTakeOnStore " and select Manual (btnManual) or Automatic (btnContinuous) scanning mode. Manual = operator presses HW button, Automatic = reading laser is always active

TJNASC.Start, TJNASC.Stop are responsible for Automatic scanning mode: Stop = Manual, Start = Automatic On

Now i have a request from user that when scanning in Automatic then after QR code reading and parsing device need to shutdown scanner on some interval (1-3 seconds) and re-activate it and continue scanning

Temporary i decided to do via FMX TTimer. It works normally, notification messages are shown, BUT! scanner is not running automatic mode until i press btnContinuous.

I tried 2 variants but same NG result. Also tried via CallInUIThread = same result.

So the problem is that i cant start Automatic reading without manual clicking on button

Dear collagues, may be i not fully understand FMX logic or doing\missing something wrong?

Edited July 17, 2020 by Kast2k
change of title

Kast2k · July 20, 2020

Problem was fixed by addition 2 new TTimer for async calls of TJNASC.Stop and TJNASC.Start parsing by HW scanner.

Topic can be closed.

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Programmatically change reading mode of HoneyWell scanner (Android 6)

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