onActivityResult 未从 startActivityForResult 调用（C++ Builder 11.2）

Question

我正在 C++ Builder 中在 android 上生成一个应用程序，它安装一个 APK 并重新启动已安装的应用程序。我可以在我们的平板电脑（货运应用程序）上单独完成这两项操作。但是，由于安装需要安装用户确认，这可能需要一段时间。问题是我希望在开始应用程序之前完成意图并获得结果。

我从来没有离开这里的 While 循环。下面是调用 apk 安装意图的主要代码和允许我退出 while 循环的方法“onActivityResult”。我已经看到将覆盖 onActivityResult 的 Delphi 代码，但我似乎无法让 C++ Builder 允许我覆盖成员函数。请原谅多个注释掉的代码，它们是我尝试过但也没有用的方法。我也留下了 messageManager 代码，但是消息处理程序也从未被调用过。

在此方面的任何帮助将不胜感激。

void __fastcall TForm5::Button3Tap(TObject *Sender, const TPointF &Point)
{
//GetDirs();     Works, so comment out for now to concentrate on intent function
UnicodeString filePath = 
   "/storage/emulated/0/Android/data/com.embarcadero.Immixt/files/Download/Immixt.apk";

if (TFile::Exists(filePath)) {

    _di_JContext Context = TAndroidHelper::Context;

    // Create the intent to install the APK file
    // Set the path to the APK file in the app's data directory
    _di_JString ApkFilePath = StringToJString(filePath);
    UnicodeString mimeType = "application/vnd.android.package-archive";
    _di_JString mimeType1 = StringToJString(mimeType);

    // Create the intent to install the APK file
    intent = TJIntent::JavaClass->init();
    intent->setAction(TJIntent::JavaClass->ACTION_INSTALL_PACKAGE);

    //intent->setAction(TJIntent::JavaClass->ACTION_INSTALL_PACKAGE);
    intent->addFlags(TJIntent::JavaClass->FLAG_ACTIVITY_NEW_TASK);
    intent->addFlags(TJIntent::JavaClass->FLAG_GRANT_READ_URI_PERMISSION);
    intent->addFlags(TJIntent::JavaClass->FLAG_GRANT_WRITE_URI_PERMISSION);
    intent->putExtra(TJIntent::JavaClass->EXTRA_NOT_UNKNOWN_SOURCE, true);
    intent->putExtra(TJIntent::JavaClass->EXTRA_RETURN_RESULT, true);


    _di_Jnet_Uri Uri1;
    _di_JFile APKFile = TJFile::JavaClass->init(ApkFilePath);
    try {
       Uri1 = TAndroidHelper::JFileToJURI(APKFile);
    } catch (const Exception& e) {
            //CLog::d(TAG, e);
        _di_Jnet_Uri Uri1 = TJnet_Uri::JavaClass->parse(ApkFilePath);

    }

    //_di_Jnet_Uri Uri1 = TJnet_Uri::JavaClass->parse(ApkFilePath);
    intent->setDataAndType(Uri1, mimeType1);

    // Start the activity to install the APK file
    activityResult = -1;
    //Context->startActivity(intent);
    FMessageSubscriptionID = TMessageManager::DefaultManager-
            >SubscribeToMessage(__classid(TMessageResultNotification), HandleActivityMessage);
    //TAndroidHelper::OnActivityResult = &onActivityResult;
    //TAndroidHelper::Activity->startActivityForResult(intent, 0);
    SharedActivity()->startActivityForResult(intent, 1234);

    /*
    TAndroidHelper::Activity->startActivityForResult(intent, 1234,
    [this](int requestCode, int resultCode, _di_JIntent data)
    {
        Form5->onActivityResult(requestCode, resultCode, data);
    });
    */

    while (activityResult == -1)
    {
        Sleep(100);
    }
      // Wait for the activity to complete



}
  /---------------------------------------------------------------------------------------

void onActivityResult(int i, int i1, Androidapi::Jni::Graphicscontentviewtext::_di_JIntent
intent)
{
TMessageManager::DefaultManager->Unsubscribe(__classid(TMessageResultNotification), 
    Form5->FMessageSubscriptionID);
Form5->FMessageSubscriptionID = 0;

// For more info see https://github.com/zxing/zxing/wiki/Scanning-Via-Intent
if (i == 1234)
{
    if (i1 == TJActivity::JavaClass->RESULT_OK)
    {
            Form5->activityResult =0;
    }
    else if (i1 == TJActivity::JavaClass->RESULT_CANCELED)
    {
            Form5->activityResult =0;
    }


}


 }

我期待下面的代码等待，直到 activityResult 被更改为退出 while 循环。 activityResult 在 onActivityResult 中被修改，根据所有文档，它应该由 SharedActivity()->startActivityForResult(intent, 1234) 调用。但它从来没有