Add downgrade to audio button for video calls.

- Add downgrade to audio button for video calls where the call capabilities
indicates that it is supported.
- Requires N SDK or higher.

Bug: 22728624
Change-Id: I92aaf1d1e77da82c2ad982a57bb2eae599cff4da

4 files changed, 71 insertions, 8 deletions

diff --git a/InCallUI/res/drawable/btn_change_to_voice.xml b/InCallUI/res/drawable/btn_change_to_voice.xml
new file mode 100644
index 000000000..86a7f21d5
--- /dev/null
+++ b/InCallUI/res/drawable/btn_change_to_voice.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (C) 2014 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:id="@+id/backgroundItem"
+          android:drawable="@drawable/btn_background" />
+
+    <item>
+        <bitmap android:src="@drawable/ic_toolbar_audio_phone"
+            android:gravity="center"
+            android:tint="@color/selectable_icon_tint"
+            android:autoMirrored="true" />
+    </item>
+
+</layer-list>
\ No newline at end of file
diff --git a/InCallUI/res/layout/call_button_fragment.xml b/InCallUI/res/layout/call_button_fragment.xml
index 0cdaf23f7..db7576404 100644
--- a/InCallUI/res/layout/call_button_fragment.xml
+++ b/InCallUI/res/layout/call_button_fragment.xml
@@ -129,6 +129,13 @@
             android:contentDescription="@string/onscreenPauseVideoText"
             android:visibility="gone" />
 
+        <!-- "Change to audio call" for video calls. -->
+        <ImageButton android:id="@+id/changeToVoiceButton"
+                     style="@style/InCallButton"
+                     android:background="@drawable/btn_change_to_voice"
+                     android:contentDescription="@string/onscreenChangeToVoiceText"
+                     android:visibility="gone" />
+
         <!-- "Add Call" -->
         <ImageButton android:id="@+id/addButton"
             style="@style/InCallButton"
diff --git a/InCallUI/src/com/android/incallui/CallButtonFragment.java b/InCallUI/src/com/android/incallui/CallButtonFragment.java
index 653847486..1904ab041 100644
--- a/InCallUI/src/com/android/incallui/CallButtonFragment.java
+++ b/InCallUI/src/com/android/incallui/CallButtonFragment.java
@@ -20,6 +20,7 @@ import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_ADD_CALL;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_AUDIO;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_COUNT;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_DIALPAD;
+import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_DOWNGRADE_TO_AUDIO;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_HOLD;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_MANAGE_VIDEO_CONFERENCE;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_MERGE;
@@ -81,11 +82,12 @@ public class CallButtonFragment
         public static final int BUTTON_SWAP = 4;
         public static final int BUTTON_UPGRADE_TO_VIDEO = 5;
         public static final int BUTTON_SWITCH_CAMERA = 6;
-        public static final int BUTTON_ADD_CALL = 7;
-        public static final int BUTTON_MERGE = 8;
-        public static final int BUTTON_PAUSE_VIDEO = 9;
-        public static final int BUTTON_MANAGE_VIDEO_CONFERENCE = 10;
-        public static final int BUTTON_COUNT = 11;
+        public static final int BUTTON_DOWNGRADE_TO_AUDIO = 7;
+        public static final int BUTTON_ADD_CALL = 8;
+        public static final int BUTTON_MERGE = 9;
+        public static final int BUTTON_PAUSE_VIDEO = 10;
+        public static final int BUTTON_MANAGE_VIDEO_CONFERENCE = 11;
+        public static final int BUTTON_COUNT = 12;
     }
 
     private SparseIntArray mButtonVisibilityMap = new SparseIntArray(BUTTON_COUNT);
@@ -96,6 +98,7 @@ public class CallButtonFragment
     private CompoundButton mHoldButton;
     private ImageButton mSwapButton;
     private ImageButton mChangeToVideoButton;
+    private ImageButton mChangeToVoiceButton;
     private CompoundButton mSwitchCameraButton;
     private ImageButton mAddCallButton;
     private ImageButton mMergeButton;
@@ -155,6 +158,8 @@ public class CallButtonFragment
         mSwapButton.setOnClickListener(this);
         mChangeToVideoButton = (ImageButton) parent.findViewById(R.id.changeToVideoButton);
         mChangeToVideoButton.setOnClickListener(this);
+        mChangeToVoiceButton = (ImageButton) parent.findViewById(R.id.changeToVoiceButton);
+        mChangeToVoiceButton.setOnClickListener(this);
         mSwitchCameraButton = (CompoundButton) parent.findViewById(R.id.switchCameraButton);
         mSwitchCameraButton.setOnClickListener(this);
         mAddCallButton = (ImageButton) parent.findViewById(R.id.addButton);
@@ -222,6 +227,9 @@ public class CallButtonFragment
             case R.id.changeToVideoButton:
                 getPresenter().changeToVideoClicked();
                 break;
+            case R.id.changeToVoiceButton:
+                getPresenter().changeToVoiceClicked();
+                break;
             case R.id.switchCameraButton:
                 getPresenter().switchCameraClicked(
                         mSwitchCameraButton.isSelected() /* useFrontFacingCamera */);
@@ -273,6 +281,7 @@ public class CallButtonFragment
         ImageButton[] normalButtons = {
                 mSwapButton,
                 mChangeToVideoButton,
+                mChangeToVoiceButton,
                 mAddCallButton,
                 mMergeButton,
                 mOverflowButton
@@ -362,6 +371,7 @@ public class CallButtonFragment
         mHoldButton.setEnabled(isEnabled);
         mSwapButton.setEnabled(isEnabled);
         mChangeToVideoButton.setEnabled(isEnabled);
+        mChangeToVoiceButton.setEnabled(isEnabled);
         mSwitchCameraButton.setEnabled(isEnabled);
         mAddCallButton.setEnabled(isEnabled);
         mMergeButton.setEnabled(isEnabled);
@@ -397,6 +407,8 @@ public class CallButtonFragment
                 return mSwapButton;
             case BUTTON_UPGRADE_TO_VIDEO:
                 return mChangeToVideoButton;
+            case BUTTON_DOWNGRADE_TO_AUDIO:
+                return mChangeToVoiceButton;
             case BUTTON_SWITCH_CAMERA:
                 return mSwitchCameraButton;
             case BUTTON_ADD_CALL:
diff --git a/InCallUI/src/com/android/incallui/CallButtonPresenter.java b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
index 34298c3fa..dde62954f 100644
--- a/InCallUI/src/com/android/incallui/CallButtonPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
@@ -19,6 +19,7 @@ package com.android.incallui;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_ADD_CALL;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_AUDIO;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_DIALPAD;
+import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_DOWNGRADE_TO_AUDIO;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_HOLD;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_MERGE;
 import static com.android.incallui.CallButtonFragment.Buttons.BUTTON_MUTE;
@@ -33,6 +34,7 @@ import android.os.Bundle;
 import android.telecom.InCallService.VideoCall;
 import android.telecom.VideoProfile;
 
+import com.android.contacts.common.compat.CallSdkCompat;
 import com.android.contacts.common.compat.SdkVersionOverride;
 import com.android.dialer.compat.CallAudioStateCompat;
 import com.android.dialer.compat.UserManagerCompat;
@@ -260,8 +262,7 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
             return;
         }
 
-        VideoProfile videoProfile = new VideoProfile(
-                VideoProfile.STATE_AUDIO_ONLY, VideoProfile.QUALITY_DEFAULT);
+        VideoProfile videoProfile = new VideoProfile(VideoProfile.STATE_AUDIO_ONLY);
         videoCall.sendSessionModifyRequest(videoProfile);
     }
 
@@ -384,7 +385,7 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         final boolean showMerge = call.can(
                 android.telecom.Call.Details.CAPABILITY_MERGE_CONFERENCE);
         final boolean showUpgradeToVideo = !isVideo && hasVideoCallCapabilities(call);
-
+        final boolean showDowngradeToAudio = isVideo && isDowngradeToAudioSupported(call);
         final boolean showMute = call.can(android.telecom.Call.Details.CAPABILITY_MUTE);
 
         ui.showButton(BUTTON_AUDIO, true);
@@ -394,6 +395,7 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         ui.showButton(BUTTON_MUTE, showMute);
         ui.showButton(BUTTON_ADD_CALL, showAddCall);
         ui.showButton(BUTTON_UPGRADE_TO_VIDEO, showUpgradeToVideo);
+        ui.showButton(BUTTON_DOWNGRADE_TO_AUDIO, showDowngradeToAudio);
         ui.showButton(BUTTON_SWITCH_CAMERA, isVideo);
         ui.showButton(BUTTON_PAUSE_VIDEO, isVideo);
         ui.showButton(BUTTON_DIALPAD, true);
@@ -411,6 +413,17 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         return call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_LOCAL_TX);
     }
 
+    /**
+     * Determines if downgrading from a video call to an audio-only call is supported.  In order to
+     * support downgrade to audio, the SDK version must be >= N and the call should NOT have the
+     * {@link android.telecom.Call.Details#CAPABILITY_CANNOT_DOWNGRADE_VIDEO_TO_AUDIO}.
+     * @param call The call.
+     * @return {@code true} if downgrading to an audio-only call from a video call is supported.
+     */
+    private boolean isDowngradeToAudioSupported(Call call) {
+        return !call.can(CallSdkCompat.Details.CAPABILITY_CANNOT_DOWNGRADE_VIDEO_TO_AUDIO);
+    }
+
     public void refreshMuteState() {
         // Restore the previous mute state
         if (mAutomaticallyMuted &&