使用C ++ Builder Bridge文件时出错

Question

I'm developing a mobile app using C++ Builder Berlin 10.1 which use a Jar library to scan barcodes. With Java2OP, I obtained a Delphi Bridge File to use the functions of the Jar. I translated it to C++ and include it to my project with the associated Jar. Here are my files:

Delphi:

{*******************************************************}
{                                                       }
{           CodeGear Delphi Runtime Library             }
{ Copyright(c) 2014 Embarcadero Technologies, Inc.      }
{                                                       }
{*******************************************************}

unit Android.JNI.ATScanLib;

interface

uses
  Androidapi.JNIBridge,
  Androidapi.JNI.JavaTypes;

type
// ===== Forward declarations =====

  JAsyncTask = interface;//android.os.AsyncTask
  JAsyncTask_Status = interface;//android.os.AsyncTask$Status
  JATScanLib = interface;//com.atid.lib.ATScanLib
  JATScanLib_OnResponseListener = interface;//com.atid.lib.ATScanLib$OnResponseListener
  JATScanLib_TagSequenceTask = interface;//com.atid.lib.ATScanLib$TagSequenceTask
  JVoid = interface;//java.lang.Void

// ===== Interface declarations =====

  JAsyncTaskClass = interface(JObjectClass)
    ['{73C141D6-F8D7-4FE4-BFA3-3441B6367189}']
    {class} function _GetSERIAL_EXECUTOR: JExecutor;
    {class} function _GetTHREAD_POOL_EXECUTOR: JExecutor;
    {class} function init: JAsyncTask; cdecl;
    {class} procedure execute(runnable: JRunnable); cdecl; overload;
    {class} property SERIAL_EXECUTOR: JExecutor read _GetSERIAL_EXECUTOR;
    {class} property THREAD_POOL_EXECUTOR: JExecutor read _GetTHREAD_POOL_EXECUTOR;
  end;

  [JavaSignature('android/os/AsyncTask')]
  JAsyncTask = interface(JObject)
    ['{8BC49850-F199-4620-BCFF-ACDA1D69417A}']
    function cancel(mayInterruptIfRunning: Boolean): Boolean; cdecl;
    function &get: JObject; cdecl; overload;
    function &get(timeout: Int64; unit_: JTimeUnit): JObject; cdecl; overload;
    function getStatus: JAsyncTask_Status; cdecl;
    function isCancelled: Boolean; cdecl;
  end;
  TJAsyncTask = class(TJavaGenericImport<JAsyncTaskClass, JAsyncTask>) end;

  JAsyncTask_StatusClass = interface(JEnumClass)
    ['{16452E24-44D5-4E84-990E-3C1916FB372B}']
    {class} function _GetFINISHED: JAsyncTask_Status;
    {class} function _GetPENDING: JAsyncTask_Status;
    {class} function _GetRUNNING: JAsyncTask_Status;
    {class} function valueOf(name: JString): JAsyncTask_Status; cdecl;
    {class} function values: TJavaObjectArray<JAsyncTask_Status>; cdecl;
    {class} property FINISHED: JAsyncTask_Status read _GetFINISHED;
    {class} property PENDING: JAsyncTask_Status read _GetPENDING;
    {class} property RUNNING: JAsyncTask_Status read _GetRUNNING;
  end;

  [JavaSignature('android/os/AsyncTask$Status')]
  JAsyncTask_Status = interface(JEnum)
    ['{96B0BCE7-1312-49B9-9F33-43541680B0E7}']
  end;
  TJAsyncTask_Status = class(TJavaGenericImport<JAsyncTask_StatusClass, JAsyncTask_Status>) end;

  JATScanLibClass = interface(JObjectClass)
    ['{9A209D1D-07C6-4309-88AD-8A2EF359CF34}']
    {class} function _GetREAD_ENCODING_ERROR: Integer;
    {class} function _GetREAD_ERROR: Integer;
    {class} function _GetREAD_OK: Integer;
    {class} function _GetREAD_TIMEOUT: Integer;
    {class} function init: JATScanLib; cdecl;
    {class} property READ_ENCODING_ERROR: Integer read _GetREAD_ENCODING_ERROR;
    {class} property READ_ERROR: Integer read _GetREAD_ERROR;
    {class} property READ_OK: Integer read _GetREAD_OK;
    {class} property READ_TIMEOUT: Integer read _GetREAD_TIMEOUT;
  end;

  [JavaSignature('com/atid/lib/ATScanLib')]
  JATScanLib = interface(JObject)
    ['{74B37E9E-F88A-4EB0-AEDF-538A472223A0}']
    function Read(P1: TJavaArray<Byte>): Integer; cdecl;
    function getReadResults: JString; cdecl;
    procedure init; cdecl;
    procedure setEncoding(P1: JString); cdecl;
    procedure setOnResponseListener(P1: JATScanLib_OnResponseListener); cdecl;
    procedure start; cdecl;
    procedure stop; cdecl;
  end;
  TJATScanLib = class(TJavaGenericImport<JATScanLibClass, JATScanLib>) end;

  JATScanLib_OnResponseListenerClass = interface(IJavaClass)
    ['{654B87BA-B4EE-4102-85E9-9FDFF3C82BAA}']
  end;

  [JavaSignature('com/atid/lib/ATScanLib$OnResponseListener')]
  JATScanLib_OnResponseListener = interface(IJavaInstance)
    ['{35AC182B-7684-47EA-9BA8-07B504F85943}']
    procedure onResponse(P1: Integer); cdecl;
  end;
  TJATScanLib_OnResponseListener = class(TJavaGenericImport<JATScanLib_OnResponseListenerClass, JATScanLib_OnResponseListener>) end;

  JATScanLib_TagSequenceTaskClass = interface(JAsyncTaskClass)
    ['{1CF84DF6-6115-4FB5-9967-B55E74A3155C}']
  end;

  [JavaSignature('com/atid/lib/ATScanLib$TagSequenceTask')]
  JATScanLib_TagSequenceTask = interface(JAsyncTask)
    ['{B83D8A9F-C1C4-4023-B1D8-3D9ABFB1FD2C}']
  end;
  TJATScanLib_TagSequenceTask = class(TJavaGenericImport<JATScanLib_TagSequenceTaskClass, JATScanLib_TagSequenceTask>) end;

  JVoidClass = interface(JObjectClass)
    ['{E5AB6B2B-2580-469B-BBF6-C226984DFEBE}']
    {class} function _GetTYPE: Jlang_Class;
    {class} property &TYPE: Jlang_Class read _GetTYPE;
  end;

  [JavaSignature('java/lang/Void')]
  JVoid = interface(JObject)
    ['{013CC63A-938C-46BE-ACAC-BA854F2F6AC8}']
  end;
  TJVoid = class(TJavaGenericImport<JVoidClass, JVoid>) end;

implementation

procedure RegisterTypes;
begin
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JAsyncTask', TypeInfo(Android.JNI.ATScanLib.JAsyncTask));
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JAsyncTask_Status', TypeInfo(Android.JNI.ATScanLib.JAsyncTask_Status));
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JATScanLib', TypeInfo(Android.JNI.ATScanLib.JATScanLib));
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JATScanLib_OnResponseListener', TypeInfo(Android.JNI.ATScanLib.JATScanLib_OnResponseListener));
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JATScanLib_TagSequenceTask', TypeInfo(Android.JNI.ATScanLib.JATScanLib_TagSequenceTask));
  TRegTypes.RegisterType('Android.JNI.ATScanLib.JVoid', TypeInfo(Android.JNI.ATScanLib.JVoid));
end;

initialization
  RegisterTypes;
end.

C++:

#ifndef Android_JNI_ATScanLibH
#define Android_JNI_ATScanLibH

#pragma delphiheader begin
#pragma option push
#pragma option -w-      // All warnings off
#pragma option -Vx      // Zero-length empty class member
#pragma pack(push,8)

#include <Androidapi.JNIBridge.hpp>
#include <Androidapi.JNI.JavaTypes.hpp>

#include <System.hpp>
#include <SysInit.hpp>

namespace Android{
namespace Jni{
namespace Atscanlib{

__interface JAsyncTask;
typedef System::DelphiInterface<JAsyncTask> _di_JAsyncTask;

__interface JAsyncTaskClass;
typedef System::DelphiInterface<JAsyncTaskClass> _di_JAsyncTaskClass;

__interface JAsyncTask_Status;
typedef System::DelphiInterface<JAsyncTask_Status> _di_JAsyncTask_Status;

__interface JAsyncTask_StatusClass;
typedef System::DelphiInterface<JAsyncTask_StatusClass> _di_JAsyncTask_StatusClass;

__interface JATScanLib;
typedef System::DelphiInterface<JATScanLib> _di_JATScanLib;

__interface JATScanLibClass;
typedef System::DelphiInterface<JATScanLibClass> _di_JATScanLibClass;

__interface JATScanLib_OnResponseListener;
typedef System::DelphiInterface<JATScanLib_OnResponseListener> _di_JATScanLib_OnResponseListener;

__interface JATScanLib_OnResponseListenerClass;
typedef System::DelphiInterface<JATScanLib_OnResponseListenerClass> _di_JATScanLib_OnResponseListenerClass;

__interface JATScanLib_TagSequenceTask;
typedef System::DelphiInterface<JATScanLib_TagSequenceTask> _di_JATScanLib_TagSequenceTask;

__interface JATScanLib_TagSequenceTaskClass;
typedef System::DelphiInterface<JATScanLib_TagSequenceTask> _di_JATScanLib_TagSequenceTaskClass;

__interface JVoid;
typedef System::DelphiInterface<JVoid> _di_JVoid;

__interface JVoidClass;
typedef System::DelphiInterface<JVoid> _di_JVoidClass;

__interface  INTERFACE_UUID("{73C141D6-F8D7-4FE4-BFA3-3441B6367189}") JAsyncTaskClass  : public Androidapi::Jni::Javatypes::JObjectClass
{
public:
    virtual JExecutor _GetSERIAL_EXECUTOR() = 0;
    virtual JExecutor _GetTHREAD_POOL_EXECUTOR() = 0;
    HIDESBASE virtual _di_JAsyncTask __cdecl init() = 0;
    virtual void __cdecl execute(JRunnable runnable) = 0;

    __property JExecutor SERIAL_EXECUTOR = {read = _GetSERIAL_EXECUTOR};
    __property JExecutor THREAD_POOL_EXECUTOR = {read = _GetTHREAD_POOL_EXECUTOR};

};

__interface  INTERFACE_UUID("{73C141D6-F8D7-4FE4-BFA3-3441B6367189}") JAsyncTask  : public Androidapi::Jni::Javatypes::JObject
{
public:
    virtual bool __cdecl cancel(bool mayInterruptIfRunning) = 0;
    virtual JObject __cdecl get() = 0;
    virtual JObject __cdecl get(__int64 timeout, JTimeUnit unit_) = 0;
    virtual _di_JAsyncTask_Status __cdecl getStatus() = 0;
    virtual bool __cdecl isCancelled() = 0;

};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJAsyncTask : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTaskClass, _di_JAsyncTask>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTaskClass, _di_JAsyncTask> inherited;
    public:
        inline __fastcall TJAsyncTask(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTaskClass, _di_JAsyncTask> (){}
        inline __fastcall virtual ~TJAsyncTask(void){}
};

#pragma pack(pop)


__interface  INTERFACE_UUID("{16452E24-44D5-4E84-990E-3C1916FB372B}") JAsyncTask_StatusClass  : public Androidapi::Jni::Javatypes::JEnumClass
{
public:
    virtual _di_JAsyncTask_Status _GetFINISHED() = 0;
    virtual _di_JAsyncTask_Status _GetPENDING() = 0;
    virtual _di_JAsyncTask_Status _GetRUNNING() = 0;
    virtual _di_JAsyncTask_Status __cdecl valueOf(JString name) = 0;
    virtual TJavaObjectArray__1<_di_JAsyncTask_Status> __cdecl values() = 0;


    __property _di_JAsyncTask_Status FINISHED = {read = _GetFINISHED};
    __property _di_JAsyncTask_Status PENDING = {read = _GetPENDING};
    __property _di_JAsyncTask_Status RUNNING = {read = _GetRUNNING};

};

__interface  INTERFACE_UUID("{96B0BCE7-1312-49B9-9F33-43541680B0E7}") JAsyncTask_Status  : public Androidapi::Jni::Javatypes::JEnum
{
};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJAsyncTask_Status : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTask_StatusClass, _di_JAsyncTask_Status>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTask_StatusClass, _di_JAsyncTask_Status> inherited;
    public:
        inline __fastcall TJAsyncTask_Status(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JAsyncTask_StatusClass, _di_JAsyncTask_Status> (){}
        inline __fastcall virtual ~TJAsyncTask_Status(void){}
};

#pragma pack(pop)

__interface  INTERFACE_UUID("{9A209D1D-07C6-4309-88AD-8A2EF359CF34}") JATScanLibClass  : public Androidapi::Jni::Javatypes::JObjectClass
{
public:
    virtual int _GetREAD_ENCODING_ERROR() = 0;
    virtual int _GetREAD_ERROR() = 0;
    virtual int _GetREAD_OK() = 0;
    virtual int _GetREAD_TIMEOUT() = 0;
    HIDESBASE virtual _di_JATScanLib __cdecl init() = 0;

    __property int READ_ENCODING_ERROR = {read = _GetREAD_ENCODING_ERROR};
    __property int READ_ERROR = {read = _GetREAD_ERROR};
    __property int READ_OK = {read = _GetREAD_OK};
    __property int READ_TIMEOUT = {read = _GetREAD_TIMEOUT};

};

__interface  INTERFACE_UUID("{74B37E9E-F88A-4EB0-AEDF-538A472223A0}") JATScanLib  : public Androidapi::Jni::Javatypes::JObject
{
public:
    virtual int __cdecl Read(TJavaArray__1<Byte> P1) = 0;
    virtual JString __cdecl getReadResults() = 0;
    virtual void __cdecl init() = 0;
    virtual void __cdecl setEncoding(JString P1) = 0;
    virtual void __cdecl setOnResponseListener(_di_JATScanLib_OnResponseListener P1) = 0;
    virtual void __cdecl start() = 0;
    virtual void __cdecl stop() = 0;
};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJATScanLib : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLibClass, _di_JATScanLib>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLibClass, _di_JATScanLib> inherited;
    public:
        inline __fastcall TJATScanLib(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLibClass, _di_JATScanLib> (){}
        inline __fastcall virtual ~TJATScanLib(void){}
};

#pragma pack(pop)

__interface  INTERFACE_UUID("{654B87BA-B4EE-4102-85E9-9FDFF3C82BAA}") JATScanLib_OnResponseListenerClass  : public Androidapi::Jnibridge::IJavaClass
{
};

__interface  INTERFACE_UUID("{35AC182B-7684-47EA-9BA8-07B504F85943}") JATScanLib_OnResponseListener  : public Androidapi::Jnibridge::IJavaInstance
{
public:
    virtual void __cdecl onResponse(int P1) = 0;
};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJATScanLib_OnResponseListener : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_OnResponseListenerClass, _di_JATScanLib_OnResponseListener>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_OnResponseListenerClass, _di_JATScanLib_OnResponseListener> inherited;
    public:
        inline __fastcall TJATScanLib_OnResponseListener(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_OnResponseListenerClass, _di_JATScanLib_OnResponseListener> (){}
        inline __fastcall virtual ~TJATScanLib_OnResponseListener(void){}
};

#pragma pack(pop)

__interface  INTERFACE_UUID("{1CF84DF6-6115-4FB5-9967-B55E74A3155C}") JATScanLib_TagSequenceTaskClass  : public _di_JAsyncTaskClass
{
};

__interface  INTERFACE_UUID("{B83D8A9F-C1C4-4023-B1D8-3D9ABFB1FD2C}") JATScanLib_TagSequenceTask  : public _di_JAsyncTask
{
};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJATScanLib_TagSequenceTask : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_TagSequenceTaskClass, _di_JATScanLib_TagSequenceTask>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_TagSequenceTaskClass, _di_JATScanLib_TagSequenceTask> inherited;
    public:
        inline __fastcall TJATScanLib_TagSequenceTask(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JATScanLib_TagSequenceTaskClass, _di_JATScanLib_TagSequenceTask> (){}
        inline __fastcall virtual ~TJATScanLib_TagSequenceTask(void){}
};

#pragma pack(pop)

__interface  INTERFACE_UUID("{E5AB6B2B-2580-469B-BBF6-C226984DFEBE}") JVoidClass : public Androidapi::Jni::Javatypes::JObjectClass
{
public:
    virtual Jlang_Class _GetTYPE() = 0;
    __property Jlang_Class TYPE = {read = _GetTYPE};

};

__interface  INTERFACE_UUID("{013CC63A-938C-46BE-ACAC-BA854F2F6AC8}") JVoid  : public Androidapi::Jni::Javatypes::JObject
{
};
#pragma pack(push,4)

class PASCALIMPLEMENTATION TJVoid : public Androidapi::Jnibridge::TJavaGenericImport__2<_di_JVoidClass, _di_JVoid>{
    typedef Androidapi::Jnibridge::TJavaGenericImport__2<_di_JVoidClass, _di_JVoid> inherited;
    public:
        inline __fastcall TJVoid(void) : Androidapi::Jnibridge::TJavaGenericImport__2<_di_JVoidClass, _di_JVoid> (){}
        inline __fastcall virtual ~TJVoid(void){}
};
#pragma pack(pop)
}
}
}
#if !defined(DELPHIHEADER_NO_IMPLICIT_NAMESPACE_USE) && !defined(NO_USING_NAMESPACE_ANDROID_JNI_ATLIB)
    using namespace Android::Jni::Atscanlib;
#endif

#if !defined(DELPHIHEADER_NO_IMPLICIT_NAMESPACE_USE) && !defined(NO_USING_NAMESPACE_ANDROID_JNI)
    using namespace Android::Jni;
#endif

#if !defined(DELPHIHEADER_NO_IMPLICIT_NAMESPACE_USE) && !defined(NO_USING_NAMESPACE_ANDROID)
    using namespace Android;
#endif

#pragma pack(pop)
#pragma option pop

#pragma delphiheader end.
#endif

When I tried to use the functions like this :

TJATScanLib* scan = new TJATScanLib();
_di_JATScanLibClass scanner = TJATScanLib::JavaClass->init();

C++ Builder raised this link error :

[ldandroid Erreur] C:\\Users\\Public\\Documents\\Embarcadero\\Studio\\18.0\\CatalogRepository\\AndroidNDK-9c_x86_GIB.Build.22858.6822\\toolchains\\arm-linux-androideabi-4.6\\prebuilt\\windows\\bin\\arm-linux-androideabi-ld.exe: .\\Android\\Debug\\Connexion.o: in function TForm_Connexion::TForm_Connexion(System::Classes::TComponent*):C:\\Users\\dylan\\Documents\\Embarcadero\\Studio\\Projets\\PDA_Android/Connexion.cpp:28:error:

undefined reference to 'Androidapi::Jnibridge::TJavaGenericImport__2, System::DelphiInterface >::GetJavaClass()'

and

[ldandroid Erreur] C:\\Users\\Public\\Documents\\Embarcadero\\Studio\\18.0\\CatalogRepository\\AndroidNDK-9c_x86_GIB.Build.22858.6822\\toolchains\\arm-linux-androideabi-4.6\\prebuilt\\windows\\bin\\arm-linux-androideabi-ld.exe: .\\Android\\Debug\\Connexion.o: in function TForm_Connexion::TForm_Connexion(System::Classes::TComponent*):C:\\Users\\dylan\\Documents\\Embarcadero\\Studio\\Projets\\PDA_Android/Connexion.cpp:30:error:

undefined reference to 'vtable for Android::Jni::Atscanlib::TJATScanLib'

Did I use the function in the wrong way?

Answer 1

I had a response from Embarcadero. I had some files which are missing from the IDE. Here are the steps to follow:

• In C++ Builder, go to Project/Options/Delphi Compiler/Search path
• Enter "$(BDSLIB)\\$(PLATFORM)\\Release;$(BDSLIB)\\$(PLATFORM)\\Debug" (without the quotes)
• Save the project and THEN try the command line build (MSBuild /v:diag XXXX.cbproj)

If it still doesn't work, the Support sent me some bpl, jdgb and de files to copy in the Bin directory and two register to add. Unfortunately, I can't attach these files to a post. If you want these files, give me your mail address and I'll send them to you. If you have the files, here are the other steps:

• Unzip the files(Link to this post) to your \\Bin directory
• Shut the IDE
• run regedit
• Go to : HKEY_CURRENT_USER\\Software\\Embarcadero\\BDS\\18.0\\Known IDE Packages
• add a string value with the name "$(BDS)\\Bin\\delphiandroid32240.bpl" and value "Delphi Android Platform" (both without the quotes)
• Then go to: "HKEY_CURRENT_USER\\Software\\Embarcadero\\BDS\\18.0\\Known IDE Packages\\Delphi"
• Add "$(BDS)\\Bin\\delphiandroidservices240.bpl" and value of "Delphi Android Services"
• Start the IDE, you should now have the Delphi android support in the IDE so project should hopefully compile in IDE.

If it compiles but doesn't generate the HPP file:

• Go to Project/Options/Delphi Compiler/ C/C++ output
• Select "Generate C++ .objs, headers, namespaces, export"

I hope it will help others who are in my case.