Developing SAP Android Mobile app from scratch – Part 4

Part 1

Part 2

Part 3

Part 4

Few lines of code

The screens of the android mobile application were designed in XML. Given below is the XML used in the start screen of the application that contains a TextView and a Button. The Textview carries a welcome text. The button click will trigger the connection with the Unwired Server and synchronizes.

Given below is the code used in the SettingsActivity Class, where it registers the user and sync the data to device.

package com.example.customers;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.ProgressDialog;

import android.content.DialogInterface;

import android.content.Intent;

import android.os.AsyncTask;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

import com.sybase.mobile.ConnectionProperties;

import com.sybase.mobile.RegistrationStatus;

import com.sybase.persistence.ConnectionProfile;

import com.sybase.persistence.LoginCredentials;

import com.sybase.sap.BAPI_CUSTOMER_GETLIST_IDRANGE;

import com.sybase.sap.CustomersDB;

import com.sybase.sap.PersonalizationParameters;

public class SettingsActivity extends Activity {

             com.sybase.mobile.Application app;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//Set the activity content to an explicit view.

setContentView(R.layout.activity_settings);                 

//Initializing button created in the layout

Button button = (Button)findViewById(R.id.button1);              

//when the button is pressed what should happen is written inside this method.

             button.setOnClickListener(new OnClickListener() {                                 

@Override

public void onClick(View v) {

try{

// Initializing Sybase mobile application

app = com.sybase.mobile.Application.getInstance();

if (app.getApplicationIdentifier() == null){

              app.setApplicationIdentifier(“Customers”);//Name of the MBO project

            app.setApplicationContext(SettingsActivity.this);

}

// An Async class is called once app is initialized

new getRegister().execute();

}catch (Exception e) {

          Toast.makeText(getBaseContext(),”ERROR–>”+e, Toast.LENGTH_SHORT).show();

}catch (ExceptionInInitializerError e) {

          Toast.makeText(getBaseContext(),”ERROR–>”+e, Toast.LENGTH_SHORT).show();

}

}

});

}

public class getRegister extends AsyncTask<Void, Void, String> {

ProgressDialog dialog = new ProgressDialog(getBaseContext());

@Override

protected void onPostExecute(String result) {

          super.onPostExecute(result);

          dialog.dismiss();

          AlertDialog.Builder builder = new AlertDialog.Builder(

          SettingsActivity.this);

if (result.equalsIgnoreCase(“success”)) {

Intent go = new Intent(SettingsActivity.this, CustomerList.class);

startActivity(go);

} else {

          builder.setTitle(“ERROR !”)

.setMessage(result)

.setPositiveButton(“OK”,

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

}

}).create().show();

}

}

@Override

protected void onPreExecute() {

          super.onPreExecute();

dialog = ProgressDialog.show(SettingsActivity.this, “Connecting”,

“\”Device with Unwired Server\””, true);

}

@Override

protected String doInBackground(Void… params) {

String returnMsg = “success”;

try {

// Setting connection properties

// ConnectionProperties has the information needed to register and connect SUP server

ConnectionProperties connProps = app.getConnectionProperties();

          connProps.setFarmId(“0”);

          connProps.setServerName(“10.10.10.10”);// IP of SUP server

// if you are using Relay Server, then use the correct port number for the Relay Server.

// if connecting using http without a relay server, use the messaging administration port, by default 5001.

// if connecting using https without a relay server, then use a new port for https, for example 9001.

          connProps.setPortNumber(5001);

// Initialize generated package database class with this Application instance

          CustomersDB.setApplication(app);

// Provide user credentials

LoginCredentials loginCredentials = new LoginCredentials(

                             “supAdmin”, “s3pAdmin”);

          connProps.setLoginCredentials(loginCredentials);

// Initialize generated package database class with this Application instance

if (app.getRegistrationStatus() != RegistrationStatus.REGISTERED) {

// If the application has not been registered to the SUP server, register now

          app.registerApplication(600);

} else {

// start the connection to SUP server

          app.startConnection(600);

}

} catch (Exception e) {

returnMsg = e.getMessage();

}

if (returnMsg == “success”){

try {

//Connect to the generated database by calling the generated database instance’s openConnection method.

if (!CustomersDB.databaseExists()) {

            CustomersDB.createDatabase();

} else {

            CustomersDB.openConnection();

}

// Retrieve the synchronization profile object using the SAP Mobile Platform database’s getSynchronizationionProfile method.

ConnectionProfile connectionProfile = CustomersDB

.getSynchronizationProfile();

            connectionProfile.setServerName(“10.10.10.10”);//SUP server IP

            connectionProfile.setPortNumber(2480);

            connectionProfile.setNetworkProtocol(“http”);

            connectionProfile.setAsyncReplay(true);

            connectionProfile.setDomainName(“default”);

            connectionProfile.save();

//The input of the RFC is a table, hence the data-type of the Personalization Key(PK) is also table

//So the input to PK is passed as range that contains multiple set of data (here we have only one set)

BAPI_CUSTOMER_GETLIST_IDRANGE range  = new BAPI_CUSTOMER_GETLIST_IDRANGE();

            range.setSIGN(“I”);

               range.setOPTION(“BT”);

          range.setLOW(“0”);

          range.setHIGH(“9”);

          com.sybase.collections.GenericList<BAPI_CUSTOMER_GETLIST_IDRANGE> rangeList = new                     com.sybase.collections.GenericList<BAPI_CUSTOMER_GETLIST_IDRANGE>() ;

          rangeList.add( range ) ;

//Assing Values to PK

PersonalizationParameters param = CustomersDB.getPersonalizationParameters();

          param.setPK_CustomerInput(rangeList);

          param.save();

          CustomersDB.subscribe();

//Make a blocking synchronize call to Unwired Server to pull in all MBO data

          CustomersDB.synchronize();

}catch (Exception e) {

returnMsg = e.getMessage();

}

}

return returnMsg;

}

}

}

Create a simple ListActivity class to show the list of customers fetched from SAP server. To create a new class right click on the package com.example.customers> New> Class.

Add following lines of code inside the new class. It calls a simple listview in the screen.

package com.example.customers;

import java.util.ArrayList;

import java.util.List;

import android.app.ListActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListAdapter;

import com.sybase.sap.Customers;

public class CustomerList extends ListActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

     super.onCreate(savedInstanceState);

ListAdapter adapter = createAdapter();

setListAdapter(adapter);

}

protected ListAdapter createAdapter()

{

List poset = new ArrayList();

//Finall is the query generated by SUP to get the data from the table Customers.

//Customers is the MBO name in SUP and table name in Device DB

for(Customers itemheader : Customers.findAll())

{

     poset.add(itemheader.getNAME());

}

ListAdapter adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, poset);

return adapter;

}

}

In the Android project add the permissions to access INTERNET, READ_PHONE_STATE, ACCESS_WIFI_STATE, ACCESS_NETWORK_STATE, WRITE_EXTERNAL_STORAGE by openining AndroidMenifest.xml file. Also add the newly created ListActivity (CustomerList) in it.

Run the application

Right click the Customers project> Run As> Android Application.

Download the project

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Midhun VP

@midhunvptwit