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Developing SAP Android Mobile app from scratch – Part 4

February 11, 2014 | 509 Views |
 androidmbomobile business objectsap androidsap mobilesap native app
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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.

/wp-content/uploads/2014/02/35_385127.jpg

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.

/wp-content/uploads/2014/02/36_385242.jpg/wp-content/uploads/2014/02/37_385243.jpg

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.

/wp-content/uploads/2014/02/38_385247.jpg

Run the application

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

droid@screen-1.pngdroid@screen-2.png



Download the project

Midhun VP

@midhunvptwit

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16 Comments

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  1. Former Member

    Hi Midhun,

    Thanks for the nice post. I tried to do a small POC by following your blog.

    Few Issues I am facing when I tried to run the project on the android simulator.

    Please help me out.

    I have created a RFC which will take the input for username and will output the corresponding Issue_ID.

    I created a Personalization key called PK_USERNAME and hard-coded its value to the username for which I want to fetch the Issue ID.

    When I tried to run the project on the android simulator..

    Got the first screen as:

    /wp-content/uploads/2014/02/snapshot_1_396114.jpg

    When I Pressed the button, following exception occurred.
    /wp-content/uploads/2014/02/snapshot_2_396115.jpg

    When I again tried to get the results, it gave me the following message/wp-content/uploads/2014/02/snapshot_3_396127.jpgPlease help me in this. I am new to android development.

    Thanks

    (0) 
    1. Midhun VP Post author

      Can you give the code you written. Have you added the SUP/SMP related libraries in your project? Test the app in android version 4.0. Download the project I attached with the blog and double the code written and the libraries.

      – Midhun VP

      (0) 
      1. Former Member

        Midhun,

        I have added the SUP related libraries to my android work space that got generated in my SUP Generated Code. No error exists in the project.

        Here I am providing the code for SettingsActivity.java

        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(“TestApp”);// 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(), “ERROR1 OCCURRED–>” + e,

          Toast.LENGTH_SHORT).show();

          } catch (ExceptionInInitializerError e) {

          Toast.makeText(getBaseContext(), “ERROR2 OCCURRED–>” + 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,

          IssueList.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();

          System.out.println(connProps);

          connProps.setFarmId(“0”);

          connProps.setServerName(“xxx.xx.xxx.xx”);// 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

          TestAppDB.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 (!TestAppDB.databaseExists()) {

          TestAppDB.createDatabase();

          } else {

          TestAppDB.openConnection();

          }

          // Retrieve the synchronization profile object using the SAP

          // Mobile Platform database’s getSynchronizationionProfile

          // method.

          ConnectionProfile connectionProfile = TestAppDB

          .getSynchronizationProfile();

          connectionProfile.setServerName(“xxx.xx.xxx.xxx”);// 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)

          // Assing Values to PK

          PersonalizationParameters param = TestAppDB

          .getPersonalizationParameters();

          param.setPK_USERNAME(“Debidutta”);

          param.save();

          TestAppDB.subscribe();

          // Make a blocking synchronize call to Unwired Server to

          // pull in all MBO data

          TestAppDB.synchronize();

          } catch (Exception e) {

          System.err.println(“Exception Occurred”);

          returnMsg = e.getMessage();

          }

          }

          return returnMsg;

          }

          }

        }

        Please check it and let me know your suggestions.

        Thanks

        (0) 
  2. Former Member

    Hello…this is a very good tutorial,can you please make a similar one with SMP 3.0??

    I really have some issues to understand how the whole things work together in the new version.

    Thanks in advance and looking forward to see good tutorials from you 🙂

    (0) 
  3. Former Member

    Hi Midhun

    This is a good one. Thank you for sharing the same  ..  would you be having any information on how to create and  link an apps to HANA in Cloud platform ?

    Thanks & Regards

    Sreeja

    (0) 

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