Connection SAP and Android through JCo

Question

I try to connect ANDROID with SAP system via RFC... Is that possible ? I think its possible because this video shows de connection but I don't know why JCo version (he uses strange classes)

I am working on Windows 7 (x86) and Eclipse IDE.

I have added sapjco.jar to the library project,

added these files to SYSTEM32 FOLDER( sapjcorfc.dll, librfc32.dll )

That´s my code:

package com.example.jco32;

import android.app.Activity;
import com.sap.mw.jco.*;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

    
      JCO.Client client = null;
      JCO.Function funcion = null;
      JCO.Table t_spfli = null;

      IRepository repositorio = null;
      IFunctionTemplate ftemplate = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Button clickButton = (Button) findViewById(R.id.button1);
        clickButton.setOnClickListener( new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub
                        ejecutarjco();
                    }
                
                });    
        
    }
    
   

> public void ejecutarjco() {

>      System.out.println("i entered to hte method");

       
       try {
           client = JCO.createClient("100",
                                     "USER",
                                     "PASS",
                                     "EN",
                                     "/H/111.22.52.198/W/TESTING/H/172.25.10.21",
                                     "02");
         
         //abre la conexion
           System.out.print("BEFORE CONNECT()");
            client.connect();
            Toast.makeText(getApplicationContext(), 
                    "connected", Toast.LENGTH_LONG).show();
            System.out.print("connected");
            
       
       } catch (Exception e) {
           System.out.println("Error:" +e.getMessage());
       }
    }
}

Unfortunately I got the next error (all lines below are actually prefixed 09-26 02:03:48.934: E/AndroidRuntime(670):, e.g. the first line FATAL EXCEPTION: main is actually 09-26 02:03:48.934: E/AndroidRuntime(670): FATAL EXCEPTION: main):

FATAL EXCEPTION: main
java.lang.ExceptionInInitializerError
    at com.example.jco32.MainActivity.ejecutarjco(MainActivity.java:46)
    at com.example.jco32.MainActivity$1.onClick(MainActivity.java:34)
    at android.view.View.performClick(View.java:3511)
    at android.view.View$PerformClick.run(View.java:14105)
    at android.os.Handler.handleCallback(Handler.java:605)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4424)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ExceptionInInitializerError: JCO.classInitialize():  Could not
    load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
null
    at com.sap.mw.jco.JCO.<clinit>(JCO.java:776)
  ... 13 more

I hope your help. Regards

Answer 1

This won't work. JCo requires a native library that is not available for Android platforms.