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

You can just write some REST/SOAP webService which connects via JCo to SAP and then you just have to send standard HTTP request to your WS, there you fetch data from SAP and return it to Android as JSON/XML response.

Answer 2

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