Adds onUiReady and onUiUnready to the presenter

- ConferenceManagerPresenter needs these two functions to listen to
  CallList changes.
- Moves super.onUiUnready() to the top of the onUiUnready methods for
  both the AnswerPresenter and ConferenceManagerPresenter classes.

Bug: 10696097
Change-Id: I050071f10ebe5112d9d41192ea8c78593189bd9b

3 files changed, 18 insertions, 4 deletions

diff --git a/src/com/android/incallui/AnswerPresenter.java b/src/com/android/incallui/AnswerPresenter.java
index e8bcc99c..e820929a 100644
--- a/src/com/android/incallui/AnswerPresenter.java
+++ b/src/com/android/incallui/AnswerPresenter.java
@@ -56,7 +56,6 @@ public class AnswerPresenter extends Presenter<AnswerPresenter.AnswerUi>
         if (mCallId != Call.INVALID_CALL_ID) {
             CallList.getInstance().removeCallUpdateListener(mCallId, this);
         }
-
     }
 
     @Override
diff --git a/src/com/android/incallui/CallButtonPresenter.java b/src/com/android/incallui/CallButtonPresenter.java
index f14d851a..ec8e8447 100644
--- a/src/com/android/incallui/CallButtonPresenter.java
+++ b/src/com/android/incallui/CallButtonPresenter.java
@@ -50,13 +50,12 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
 
     @Override
     public void onUiUnready(CallButtonUi ui) {
+        super.onUiUnready(ui);
+
         InCallPresenter.getInstance().removeListener(this);
         AudioModeProvider.getInstance().removeListener(this);
 
         mProximitySensor = null;
-
-        // set Ui to null, so should go last
-        super.onUiUnready(ui);
     }
 
     @Override
diff --git a/src/com/android/incallui/ConferenceManagerPresenter.java b/src/com/android/incallui/ConferenceManagerPresenter.java
index ccda4a57..041614db 100644
--- a/src/com/android/incallui/ConferenceManagerPresenter.java
+++ b/src/com/android/incallui/ConferenceManagerPresenter.java
@@ -39,8 +39,24 @@ public class ConferenceManagerPresenter
     private Context mContext;
 
     @Override
+    public void onUiReady(ConferenceManagerUi ui) {
+        super.onUiReady(ui);
+
+        // register for call state changes last
+        InCallPresenter.getInstance().addListener(this);
+    }
+
+    @Override
+    public void onUiUnready(ConferenceManagerUi ui) {
+        super.onUiUnready(ui);
+
+        InCallPresenter.getInstance().removeListener(this);
+    }
+
+    @Override
     public void onStateChange(InCallState state, CallList callList) {
         if (getUi().isFragmentVisible()) {
+            Log.v(this, "onStateChange" + state);
             if (state == InCallState.INCALL && callList.getActiveOrBackgroundCall() != null &&
                     callList.getActiveOrBackgroundCall().isConferenceCall()) {
                 Log.v(this, "Number of existing calls is " +