Mobile Applications for Business
Master SIA/SDBIS
Octavian Dospinescu
2022
(c) Octavian Dospinescu 2022-2023 pentru
1
Master SIA
General topic
• GSM capabilities in Android
• Sending/receiving SMSs in a programmatic
manner
• Class android.telephony.SmsManager –
general anatomy
• Specific rights in AndroidManifest.xml
• Specific concepts: broadcast, intent etc.
• Future directions
(c) Octavian Dospinescu 2022-2023 pentru
2
Master SIA
Final goal (for the current course)
A mini-application which will be able to do the
following operations:
• Getting a text message from the mobile device’s user;
• Sending a SMS message (Short Message Service) to a
mobile recipient;
• Informing the user about the message that was sent;
• Informing the user about any error that occurs during
the transmission.
(c) Octavian Dospinescu 2022-2023 pentru
3
Master SIA
Additional goal
A module able to “intercept” the messages received
on the mobile phone.
This operation aims explicit processing of the data
contained in an SMS message that we receive on
the mobile phone: the number of the sender and
the message itself.
(c) Octavian Dospinescu 2022-2023 pentru
4
Master SIA
Preamble
Firtst of all, it is necessary to define 2 emulators: a
sender and a receiver (receptor) for SMS.
(c) Octavian Dospinescu 2022-2023 pentru
5
Master SIA
Simplified architecture of the
activity (form)
A graphical interface having 3 simple elements:
• an informative text (TextView – Specify your
message);
• a text-box where the user will be able to type his
own message (EditText);
• a button by which the operation of sending an
SMS will be started (Button).
(c) Octavian Dospinescu 2022-2023 pentru
6
Master SIA
Simplified architecture of the form
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7
Master SIA
Class android.telephony.SmsManager
import android.telephony.SmsManager;
The class SmsManager is to allow the management of the
sms messages in terms of sending them to the recipient.
We obtain objects from the SmsManager class by calling
the static method SmsManager.getDefault().
(c) Octavian Dospinescu 2022-2023 pentru
8
Master SIA
Class android.telephony.SmSManager
The used method is sendTextMessage, with the following
list of parameters:
•destinationAddress: it represents the phone number of the
receipient, expressed as String format;
•scAddress: it represents the number of the service center, in String
format. By default, this number is already known by the mobile device
and as result we could use the null value in order to get the default
number.
(c) Octavian Dospinescu 2022-2023 pentru
9
Master SIA
Class android.telephony.SmSManager
The used method is sendTextMessage, with the following
list of parameters:
•text: it represents the message that will be sent to the
destinationAddress, using the service center specified by scAddress. It
is very important to mention that if this text has more than 160 chars
(the maximum length of a standard SMS message), then it will be
generated an exception that should be treated.
•sentIntent and deliveryIntent have the role of catching codes
resulted after the sending and delivering of the messages. For the
beginning, we recommend the using of null values in the case of these
2 last parameters.
(c) Octavian Dospinescu 2022-2023 pentru
10
Master SIA
Class android.telephony.SmSManager
VERY IMPORTANT!!!
• The method sendTextMessage generates an
IllegalArgumentException exception if
destinationAddress or text are empty.
(c) Octavian Dospinescu 2022-2023 pentru
11
Master SIA
Class android.telephony.SmSManager
A model of using (just a suggestion)
SmsManager sms;
sms = SmsManager.getDefault();
sms.sendTextMessage(numarDestinatar, null, mesajSMS,
null, null);
(c) Octavian Dospinescu 2022-2023 pentru
12
Master SIA
A model of implementation
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==btnSMS) { //the button has been pressed by the user
//we are generating a new manager for sending SMSs
SmsManager sms;
sms = SmsManager.getDefault();
//we define the recipient's phone’s number
String numarDestinatar;
numarDestinatar="5556";
//we take the message typed by the user on the form
String mesajSMS;
mesajSMS=this.txtMesaj.getText().toString();
try {
//we send the SMS message
sms.sendTextMessage(numarDestinatar, null, mesajSMS, null, null);
//we prepare a message to inform the user
notificare = Toast.makeText(getApplicationContext(), "Mesajul a
fost trimis",Toast.LENGTH_LONG);
//we are showing the notification
notificare.show();
}
catch (Exception eroare) {
//if troubles, we show the error message
notificare = Toast.makeText(getApplicationContext(),
"Eroare:" + eroare.getMessage(), Toast.LENGTH_LONG);
notificare.show();
}
} (c) Octavian Dospinescu 2022-2023 pentru
13
Master SIA
Permissions and rights
To send an SMS, it is necessary that the application
has the permission from the Android operating
system.
The permission is written in the file
AndroidManifest.xml, in the section uses-
permission.
In our case, the name of the permission is
android.permissions.SEND_SMS.
(c) Octavian Dospinescu 2022-2023 pentru
14
Master SIA
Permissions and rights
After adding this permission for our application, the AndroidManifest.xml file stored
this aspect in a specific line (uses-permission tag).
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.adminlocal.appcurs02" >
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AppMessages"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
(c) Octavian Dospinescu 2022-2023 pentru
15
Master SIA
Running the application
(c) Octavian Dospinescu 2022-2023 pentru
16
Master SIA
The list of messages from the
destination emulator
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17
Master SIA
Future directions
• The possibility of sending “flows” of SMSs
Implement a new application which sends
customized SMSs to a list of recipients. We
recommend that the list is stored in a text file, in a
format like:
recipientPhoneNumber:CustomMessage
(c) Octavian Dospinescu 2022-2023 pentru
18
Master SIA
Future directions
• The possibility of sending “flows” of SMSs
That way, the user has the possibility to send a
whole set of SMS messages to a list of people, by
loading that file.
(c) Octavian Dospinescu 2022-2023 pentru
19
Master SIA
Future directions
• The possibility of sending “flows” of SMSs
The immediate applicability of this application can
be found in mass information campaigns carried
out by large retail chains via SMS.
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20
Master SIA
Future directions
• The possibility of sending “flows” of SMSs…
• What if the recipient’s number is a “hot” one?
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21
Master SIA
Full implementation (for the lab)
package com.example.adminlocal.appcurs02;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class AppMessages extends ActionBarActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_app_messages);
Button btnSend;
btnSend = (Button) findViewById(R.id.btnSendMessage);
btnSend.setOnClickListener(this);
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.SEND_SMS},1);
}
(c) Octavian Dospinescu 2022-2023 pentru
22
Master SIA
@Override
public void onClick(View v) {
SmsManager sms;
sms = SmsManager.getDefault();
String destinationNumber = "5556"; //for the second emulator
EditText txtMesaj = (EditText) findViewById(R.id.txtMesaj);
String mesajSms;
mesajSms =txtMesaj.getText().toString();
try
{
sms.sendTextMessage(destinationNumber,null,mesajSms,null,null);
Toast notificare = Toast.makeText(getApplicationContext(),"Message sent",Toast.LENGTH_LONG);
notificare.show();
}
catch (Exception eroare)
{
Toast notificare = Toast.makeText(getApplicationContext(),"Trouble: " +
eroare.getMessage(),Toast.LENGTH_LONG);
notificare.show();
}
}
}
(c) Octavian Dospinescu 2022-2023 pentru
23
Master SIA
More details about Android
permissions
https://developer.android.com/training/permissions/requesting.html
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24
Master SIA
