The document discusses Android telephony and messaging APIs. It describes the TelephonyManager class which provides information about phone state and services, and allows registering for state change notifications. It also describes the SmsManager class which allows sending and receiving SMS messages programmatically. Permissions need to be declared to access certain telephony data and send SMS.

1. Android
Telephony
and
Messaging
Jussi
Pohjolainen

2. Overview
• Telephone
API
is
used
monitor
phone
informa=on
– States
of
phone,
connec=on
• Available
in
package
android.telephony
• Classes
like:
SmsManager,
TelephonyManager

3. TelephonyManager
• Class
to
determine
telephony
services
and
states
– IDLE,
RINGING,
DATA_CONNECTED…
• App
can
register
to
receive
no=fica=ons
of
state
changes
• Some
telephony
informa=on
needs
permissions
to
be
set
in
the
manifest:
–
<uses-permission
android:name="android.permission.READ_PHONE_
STATE” />

4. Example
LISTEN_DATA_ACTIVITY
LISTEN_SIGNAL_STRENGTHS
…

5. SmsManager
• Manages
SMS
opera=ons
such
as
sending
data,
text,
and
pdu
SMS
messages.
• Get
this
object
by
calling
the
sta=c
method
SmsManager.getDefault().
• Add
permission:
android.permission.SEND_SMS

6. Sending
SMS
(SmsManager.getDefault()).sendTextMessa
ge("+3585012345", null, “message”,
null, null);

7. Receiving
SMS
<receiver
android:name=".SmsReceiver">
<intent-­‐filter>
<ac=on
android:name=
"android.provider.Telephony.SMS_RECEIVED"
/>
</intent-­‐filter>
</receiver>

8. Receiving
SMS