Android客户端“ com.embarcadero.javaandroid.DBXException”

Question

我想使用带有Android的Delphi服务器作为客户端。但是我遇到了com.embarcadero.javaandroid.DBXException错误。

我已经在Android清单中请求了Internet权限，应用程序和服务器上的IP和端口相同，并且服务器正在工作，因为如果在资源管理器中执行它，就会看到响应。 / p>

如果我将Android设备与网络断开连接，则会遇到相同的错误，因此我认为问题出在Android上，但我不知道为什么会这样。

我使用本教程：

Android apps connected to Delphi DataSnap Server

这是我的主班：

//This method gets the connection to the server
private DSRESTConnection getConnection() {
        DSRESTConnection conn = new DSRESTConnection();
        conn.setHost("192.168.2.106");
        conn.setPort(Integer.valueOf(puerto.getText().toString()));
        return conn;
    }

    //This method calls another which is supposed to return the same string
    private void insert()
    {
        DSRESTConnection conn = getConnection();
        DSProxy.TServerMethods1 sm = new DSProxy.TServerMethods1(conn);

        try {
            String re;
            re = sm.EchoString(buscar.getText().toString());
            Toast.makeText(getApplicationContext(), " Resultado" + re, Toast.LENGTH_LONG).show();

        } catch (DBXException e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), " ERROR "+e, Toast.LENGTH_LONG).show();
        }

这是我正在调用的方法：

package com.embarcadero.javaandroid;

public class DSProxy {
  public static String valor;
  public static class TServerMethods1 extends DSAdmin {
    public TServerMethods1(DSRESTConnection Connection) {
      super(Connection);
    }


    private DSRESTParameterMetaData[] TServerMethods1_EchoString_Metadata;
    private DSRESTParameterMetaData[] get_TServerMethods1_EchoString_Metadata() {
      if (TServerMethods1_EchoString_Metadata == null) {
        TServerMethods1_EchoString_Metadata = new DSRESTParameterMetaData[]{
          new DSRESTParameterMetaData("Value", DSRESTParamDirection.Input, DBXDataTypes.WideStringType, "string"),
          new DSRESTParameterMetaData("", DSRESTParamDirection.ReturnValue, DBXDataTypes.WideStringType, "string"),
        };
      }
      return TServerMethods1_EchoString_Metadata;
    }

    /**
     * @param Value [in] - Type on server: string
     * @return result - Type on server: string
     */
    public String EchoString(String Value) throws DBXException {
      DSRESTCommand cmd = getConnection().CreateCommand();
      cmd.setRequestType(DSHTTPRequestType.GET);
      cmd.setText("TServerMethods1.EchoString");
      cmd.prepare(get_TServerMethods1_EchoString_Metadata());
      cmd.getParameter(0).getValue().SetAsString(Value);
      getConnection().execute(cmd);
      return  cmd.getParameter(1).getValue().GetAsString();

    }

  }

}

这是我从调试器得到的：

    W/System.err: com.embarcadero.javaandroid.DBXException
    W/System.err:     at com.embarcadero.javaandroid.DSRESTConnection.execute(DSRESTConnection.java:336)
            at com.embarcadero.javaandroid.DSProxy$TServerMethods1.EchoString(DSProxy.java:41)
            at com.expertos.conexionconservidor.MainActivity.insert(MainActivity.java:58)
            at com.expertos.conexionconservidor.MainActivity.access$000(MainActivity.java:15)
            at com.expertos.conexionconservidor.MainActivity$1.onClick(MainActivity.java:36)
            at android.view.View.performClick(View.java:5637)
            at android.view.View$PerformClick.run(View.java:22433)
            at android.os.Handler.handleCallback(Handler.java:751)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:154)
    W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6130)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
    W/IInputConnectionWrapper: finishComposingText on inactive InputConnection

最后，此方法会产生错误：

public void execute(DSRESTCommand command) throws DBXException {
        HttpClient client = null;

        HttpUriRequest method = CreateRequest(command);
        try {
            if (isHttps) {
                if (SSLFactory != null) {
                    client = SSLFactory.getHttpClient(connectionTimeout,
                            communicationTimeout);
                } else {
                    throw new DBXException("Cannot create https connection");
                }
            } else
                client = getHttpClient(); // fallback to the http one

            HttpResponse response = client.execute(method);
            setSessionIdentifier(response);
            throwExceptionIfNeeded(response);
            if (isThereOnlyOneStreamInOutput(command.getParameters())) {
                InputStream inputstream = response.getEntity().getContent();
                byte[] b1 = DBXTools.streamToByteArray(inputstream);
                TStream is = new TStream(b1);
                for (DSRESTParameter param : command.getParameters()) {
                    if ((param.Direction == DSRESTParamDirection.ReturnValue)
                            || (param.Direction == DSRESTParamDirection.InputOutput)
                            || (param.Direction == DSRESTParamDirection.Output)) {
                        if (param.TypeName.startsWith("TDBX")
                                && param.TypeName.endsWith("Value")) {
                            param.getValue().GetAsDBXValue().SetAsStream(is);
                        } else {
                            param.getValue().SetAsStream(is);
                        }
                        break;
                    } // if
                } // for
            } else {
                try {
                    String s = EntityUtils.toString(response.getEntity());
                    TJSONObject json = TJSONObject.Parse(s);
                    throwExceptionIfNeeded(json);
                    TJSONArray results = json.getJSONArray("result");
                    int returnParIndex = 0;
                    for (DSRESTParameter param : command.getParameters()) {
                        if ((param.Direction == DSRESTParamDirection.ReturnValue)
                                || (param.Direction == DSRESTParamDirection.InputOutput)
                                || (param.Direction == DSRESTParamDirection.Output)) {
                            DBXJSONTools.JSONtoDBX(results.get(returnParIndex),
                                    param.getValue(), param.TypeName);
                            returnParIndex++;
                        } // if
                    } // for
                } catch (DBXException e) {
                    throw new DBXException(e);
                }
            }
        } catch (Exception e) {
            throw new DBXException(e);
        }
    }