Question

我正在尝试在Delphi Seattle中使用Honeywell SDK来控制Android设备上的扫描仪。

霍尼韦尔为我提供了一个名为DataCollection.jar的SDK jar。我使用Java2OP实用程序来创建我的JNI桥，但是遇到了麻烦。说实话，我是一个新手，我不知道在哪里看或如何实现这一点。我也搜索过类似的例子。

我知道我必须创建一个TJAidmanager类型的对象来访问条形码阅读器功能，它定义为：

JAidcManagerClass = interface(JObjectClass)
['{EE70EF80-4CA8-4FE0-B912-6453CA0336CD}']
{class} function _GetBARCODE_DEVICE_CONNECTED: Integer; cdecl;
{class} function _GetBARCODE_DEVICE_DISCONNECTED: Integer; cdecl;
{class} procedure addBarcodeDeviceListener(P1:      JAidcManager_BarcodeDeviceListener); cdecl;
{class} procedure close; cdecl;
{class} procedure create(P1: JContext; P2: JAidcManager_CreatedCallback);    cdecl;
{class} function createBarcodeReader: JBarcodeReader; cdecl; overload;
{class} function createBarcodeReader(P1: JString): JBarcodeReader; cdecl;     overload;
{class} function listBarcodeDevices: JList; cdecl;
{class} function listConnectedBarcodeDevices: JList; cdecl;
{class} procedure removeBarcodeDeviceListener(P1:    JAidcManager_BarcodeDeviceListener); cdecl;
{class} property BARCODE_DEVICE_CONNECTED: Integer read     _GetBARCODE_DEVICE_CONNECTED;
{class} property BARCODE_DEVICE_DISCONNECTED: Integer read   _GetBARCODE_DEVICE_DISCONNECTED;
end;

[JavaSignature('com/honeywell/aidc/AidcManager')]
JAidcManager = interface(JObject)
['{98A668C5-9204-4F0C-98B0-A8E1F1124738}']
end;
TJAidcManager = class(TJavaGenericImport<JAidcManagerClass, JAidcManager>)    end;

java示例代码如下所示：

import com.honeywell.aidc.*;
public class MainActivity extends Activity {
private AidcManager manager;
private BarcodeReader reader;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// create the AidcManager providing a Context and an
// CreatedCallback implementation.
AidcManager.create(this, new AidcManager.CreatedCallback() {

@Override
public void onCreated(AidcManager aidcManager) {
manager = aidcManager;
reader = manager.createBarcodeReader();
}
}
}

@Override
public void onDestroy() {
super.onDestroy();
// make sure that AidcManager isn't null
if (reader != null) {
// close BarcodeReader to clean up resources.
// once closed, the object can no longer be used.
reader.close();
}
if (manager != null) {
// close AidcManager to disconnect from the scanner service.
// once closed, the object can no longer be used.
manager.close();
}
}
}

现在当我尝试在delphi中使用它时，我已经尝试了这个但是得到了一个分段错误：

var cb : JAidcManager_CreatedCallback;
begin
      TJAidcManager.JavaClass.create(SharedActivity,TJAidcManager_CreatedCallback.Wrap((cb as ILocalObject).getobjectID));

JAidcManager_CreatedCallback定义为：

 JAidcManager_CreatedCallbackClass = interface(IJavaClass)
    ['{E27EF6BB-C642-42B6-98CA-6C270A1AD5D1}']
    {class} procedure onCreated(P1: JAidcManager); cdecl;//Deprecated
  end;

  [JavaSignature('com/honeywell/aidc/AidcManager$CreatedCallback')]
  JAidcManager_CreatedCallback = interface(IJavaInstance)
    ['{E2713D70-1CE6-43AA-9181-7054BD787F1B}']
  end;
  TJAidcManager_CreatedCallback =   class(TJavaGenericImport<JAidcManager_CreatedCallbackClass,   JAidcManager_CreatedCallback>) end;

我假设我必须为TJAidcManager类型的变量实现onCreated事件，但我不确定如何将它们全部链接在一起。

然后我尝试了这个：

var   cb : JObject;
begin
  cb := TjObject.Create;
  TJAidcManager.JavaClass.create(SharedActivityContext,TJAidcManager_CreatedCallback.Wrap((cb as ILocalObject).getobjectID));

我还在实现部分中将其添加到JNIBridge单元：

procedure onCreated(P1: JAidcManager); cdecl;//Deprecated
begin
   Form2.manager := P1;
end;

运行时，我得到一个＆＃34; java.lang.SecurityException：不允许绑定到服务Intent {acct = com.honeywell.decode.DecodeService cmp = com.intermec.datacollectionservice / .DataCollectionService}＆＃ 34;错误。我尝试添加＆＃34;绑定远程视图＆＃34;权限，但没有帮助。

如果有人可以告诉我或指出我如何在Delphi中创建AidcManager的正确方向，那将不胜感激。

Answer 1

这个问题已经解决了。我需要扩展com.embarcadero.firemonkey.FMXNativeActivity。

完整解决方案的详细信息可以在Embaradero Forum with link to Source

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在Delphi中使用第三方Android API

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