InCallUI: improve in-call UI for different supported routes

On some devices, there is no earpiece route available, and the speaker
is the default audio output. To make in-call UI correctly operate on
such devices, the following changes are introduced:

* the "earpiece handset" output icon becomes hidden from the list of
  choices in the audio button if no earpiece route is supported

* if device does not support earpiece route but wired headset is
  plugged in, the "earpiece handset" output icon becomes visible
  to reflect the wired headset as an actual call audio output

* the text option of earpiece becomes hidden from choices if the
  device does not support earpiece route

* audio button is shown only if there are more than one route is
  present on the device, otherwise it stays hidden

Test:

* On devices with speaker and earpiece routes present, the audio
  button is visible and acts like a speaker toggle

* On devices with speaker and earpiece routes present and wired
  headset plugged in, the audio button is visible and acts as
  a speaker toggle

* On devices with speaker-only or earpiece-only routes present
  and wired headset plugged in, the audio button is visible and
  acts as a speaker toggle

* On devices with speaker and earpiece routes present and
  Bluetooth headset paired, the audio button is visible and acts
  as a multi-state toggle allowing user to choose Bluetooth
  (by default), speaker or handset earpiece

* On devices with speaker-only or earpiece-only routes present
  and Bluetooth headset paired, the audio button is visible and
  acts as a multi-state toggle allowing user to choose Bluetooth
  (by default) and speaker or handset earpiece

* On devices with speaker-only or earpiece-only routes present,
  the audio button is invisible

Change-Id: I9359aaaa44b89f5937cc1a7d9fbd5fe25c71133d

2 files changed, 46 insertions, 4 deletions

diff --git a/InCallUI/src/com/android/incallui/CallButtonFragment.java b/InCallUI/src/com/android/incallui/CallButtonFragment.java
index 9601ac20d..8b8829bde 100644
--- a/InCallUI/src/com/android/incallui/CallButtonFragment.java
+++ b/InCallUI/src/com/android/incallui/CallButtonFragment.java
@@ -734,6 +734,8 @@ public class CallButtonFragment
     private void updateAudioButtons() {
         final boolean bluetoothSupported = isSupported(CallAudioState.ROUTE_BLUETOOTH);
         final boolean speakerSupported = isSupported(CallAudioState.ROUTE_SPEAKER);
+        final boolean earpieceOrWiredHeadsetSupported =
+                          isSupported(CallAudioState.ROUTE_WIRED_OR_EARPIECE);
 
         boolean audioButtonEnabled = false;
         boolean audioButtonChecked = false;
@@ -757,7 +759,7 @@ public class CallButtonFragment
                 showBluetoothIcon = true;
             } else if (isAudio(CallAudioState.ROUTE_SPEAKER)) {
                 showSpeakerphoneIcon = true;
-            } else {
+            } else if (earpieceOrWiredHeadsetSupported) {
                 showHandsetIcon = true;
                 // TODO: if a wired headset is plugged in, that takes precedence
                 // over the handset earpiece.  If so, maybe we should show some
@@ -888,8 +890,9 @@ public class CallButtonFragment
         final MenuItem wiredHeadsetItem = menu.findItem(R.id.audio_mode_wired_headset);
 
         final boolean usingHeadset = isSupported(CallAudioState.ROUTE_WIRED_HEADSET);
-        earpieceItem.setVisible(!usingHeadset);
-        earpieceItem.setEnabled(!usingHeadset);
+        final boolean earpieceSupported = isSupported(CallAudioState.ROUTE_EARPIECE);
+        earpieceItem.setVisible(!usingHeadset && earpieceSupported);
+        earpieceItem.setEnabled(!usingHeadset && earpieceSupported);
         wiredHeadsetItem.setVisible(usingHeadset);
         wiredHeadsetItem.setEnabled(usingHeadset);
         // TODO: Show the above item (either earpieceItem or wiredHeadsetItem)
diff --git a/InCallUI/src/com/android/incallui/CallButtonPresenter.java b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
index a73819678..621281610 100644
--- a/InCallUI/src/com/android/incallui/CallButtonPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
@@ -194,6 +194,11 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
     public void onSupportedAudioMode(int mask) {
         if (getUi() != null) {
             getUi().setSupportedAudio(mask);
+
+            // toggle the visibility of audio button
+            getUi().showButton(BUTTON_AUDIO, shouldAudioButtonShow());
+            getUi().updateButtonStates();
+            getUi().updateColors();
         }
     }
 
@@ -533,6 +538,40 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
     }
 
     /**
+     * Checks if audio route is supported on device
+     *
+     */
+    private boolean isAudioRouteSupported(int route) {
+        return (getSupportedAudio() & route) > 0;
+    }
+
+    /**
+     * Counts number of supported routes and disables audio button if there is only one
+     * route supported (i.e nothing to choose from)
+     */
+    private boolean shouldAudioButtonShow() {
+        int numSupportedRoutes = 0;
+
+        int routes[] = {
+            CallAudioState.ROUTE_BLUETOOTH,
+            CallAudioState.ROUTE_WIRED_OR_EARPIECE,
+            CallAudioState.ROUTE_SPEAKER
+        };
+
+        for (int i = 0; i < routes.length; i++) {
+            if (isAudioRouteSupported(routes[i])) {
+                numSupportedRoutes++;
+            }
+        }
+
+        if (numSupportedRoutes == 0) {
+            Log.e(this, "numSupportedRoutes = 0");
+        }
+
+        return (numSupportedRoutes > 1);
+    }
+
+    /**
      * Updates the buttons applicable for the UI.
      *
      * @param call The active call.
@@ -603,7 +642,7 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         boolean showCallRecordOption = recorder.isEnabled()
                 && !isVideo && call.getState() == Call.State.ACTIVE;
 
-        ui.showButton(BUTTON_AUDIO, true);
+        ui.showButton(BUTTON_AUDIO, shouldAudioButtonShow());
         ui.showButton(BUTTON_SWAP, showSwap);
         ui.showButton(BUTTON_HOLD, showHold);
         ui.setHold(isCallOnHold);