commit 84fa5f8c59a1cd3c5716c239fb19c58244fc81fe
author Sailesh Nepal <sail@google.com> Wed Apr 02 11:01:11 2014 -0700
committer Sailesh Nepal <sail@google.com> Thu Apr 03 22:08:29 2014 -0700
tree f645a7d2359ec74330264629cd4ab4905421959b
parent 3ded76f284cec9d1028a30f8af5814a8159ba798

Handoff: Implement handoff in Telecomm

See the following CLs for more info on how handoff is enabled and
triggered: changeid - I94c28b10c0e0a253450f14d31ecdc416d5b44ca4

Once a Call is handoff enabled it will have a non-null mHandoffHandle.

When handoff is triggered we create a new Call object and set
mOriginalCall.

At this point we have two call objects.
  1st call: Call1
        - mHandoffHandle: non-null
        - mOriginalCall: null
  2nd (invisible) call: Call2
        - mHandoffHandle: null
        - mOriginalCall: non-null

Once the new call's state changes to active we do the following:
      call1.disconnect() // hangup on the old call
      removeCall(call2) // stop tracking the new call
      // merge into call1
      call1.setCallService(call2.getCallService());
      call1.setState(call2.State());

At this point call2 is deleted and call1 has been fully handed off.

Bug: 13643568
Change-Id: I94c28b10c0e0a253450f14d31ecdc416d5b44ca4

src/com/android/telecomm/InCallAdapter.java

diff --git a/src/com/android/telecomm/InCallAdapter.java b/src/com/android/telecomm/InCallAdapter.java
index 14669c6..da7cf18 100644
--- a/src/com/android/telecomm/InCallAdapter.java
+++ b/src/com/android/telecomm/InCallAdapter.java
@@ -35,8 +35,9 @@
     private static final int MSG_DISCONNECT_CALL = 5;
     private static final int MSG_HOLD_CALL = 6;
     private static final int MSG_UNHOLD_CALL = 7;
-    private static final int MSG_MUTE = 8;
-    private static final int MSG_SET_AUDIO_ROUTE = 9;
+    private static final int MSG_HANDOFF_CALL = 8;
+    private static final int MSG_MUTE = 9;
+    private static final int MSG_SET_AUDIO_ROUTE = 10;
 
     private final class InCallAdapterHandler extends Handler {
         @Override
@@ -75,6 +76,9 @@
                 case MSG_UNHOLD_CALL:
                     mCallsManager.unholdCall(call);
                     break;
+                case MSG_HANDOFF_CALL:
+                    mCallsManager.startHandoffForCall(call);
+                    break;
                 case MSG_MUTE:
                     mCallsManager.mute(msg.arg1 == 1 ? true : false);
                     break;
@@ -160,6 +164,13 @@
 
     /** {@inheritDoc} */
     @Override
+    public void handoffCall(String callId) {
+        mCallIdMapper.checkValidCallId(callId);
+        mHandler.obtainMessage(MSG_HANDOFF_CALL, callId).sendToTarget();
+    }
+
+    /** {@inheritDoc} */
+    @Override
     public void mute(boolean shouldMute) {
         mHandler.obtainMessage(MSG_MUTE, shouldMute ? 1 : 0, 0).sendToTarget();
     }