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<p>Provides access to Session Initiation Protocol (SIP) functionality, such as
making and answering VOIP calls using SIP.</p>
<p>For more information, see the
<a href="{@docRoot}guide/topics/network/sip.html">Session Initiation Protocol</a>
developer guide.</p>
{@more}
<p>To get started, you need to get an instance of the {@link android.net.sip.SipManager} by
calling {@link android.net.sip.SipManager#newInstance newInstance()}.</p>
<p>With the {@link android.net.sip.SipManager}, you can initiate SIP audio calls with {@link
android.net.sip.SipManager#makeAudioCall makeAudioCall()} and {@link
android.net.sip.SipManager#takeAudioCall takeAudioCall()}. Both methods require
a {@link android.net.sip.SipAudioCall.Listener} that receives callbacks when the state of the
call changes, such as when the call is ringing, established, or ended.</p>
<p>Both {@link android.net.sip.SipManager#makeAudioCall makeAudioCall()} also requires two
{@link android.net.sip.SipProfile} objects, representing the local device and the peer
device. You can create a {@link android.net.sip.SipProfile} using the {@link
android.net.sip.SipProfile.Builder} subclass.</p>
<p>Once you have a {@link android.net.sip.SipAudioCall}, you can perform SIP audio call actions with
the instance, such as make a call, answer a call, mute a call, turn on speaker mode, send DTMF
tones, and more.</p>
<p>If you want to create generic SIP connections (such as for video calls or other), you can
create a SIP connection from the {@link android.net.sip.SipManager}, using {@link
android.net.sip.SipManager#open open()}. If you only want to create audio SIP calls, though, you
should use the {@link android.net.sip.SipAudioCall} class, as described above.</p>
<p class="note"><strong>Note:</strong>
Not all Android-powered devices support VOIP functionality with SIP. Before performing any SIP
activity, you should call {@link android.net.sip.SipManager#isVoipSupported isVoipSupported()}
to verify that the device supports VOIP calling and {@link
android.net.sip.SipManager#isApiSupported isApiSupported()} to verify that the device supports the
SIP APIs.
Your application must also request the {@link android.Manifest.permission#INTERNET} and {@link
android.Manifest.permission#USE_SIP} permissions in order to use the SIP APIs.
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