[Audiosharing] UI refinement.

1. Add top summary for Audio sharing page.
2. Move Audio sharing entrance to the second place on Connection
   preferences page.
3. Make Audio sharing page searchable.
4. Add On/Off summary to Audio sharing preference on Connection
   preference page.

Test: atest
Bug: 305620450
Change-Id: I00019e53563afc0a539934fbdfa949c3401e78b9
diff --git a/res/xml/bluetooth_audio_sharing.xml b/res/xml/bluetooth_audio_sharing.xml
index d3aad22..ba3c083 100644
--- a/res/xml/bluetooth_audio_sharing.xml
+++ b/res/xml/bluetooth_audio_sharing.xml
@@ -19,6 +19,11 @@
     xmlns:settings="http://schemas.android.com/apk/res-auto"
     android:title="@string/audio_sharing_title">
 
+    <com.android.settingslib.widget.TopIntroPreference
+        android:key="audio_sharing_top_intro"
+        android:title="Let others listen to your media along with you using their own compatible headphones"
+        settings:searchable="false" />
+
     <PreferenceCategory
         android:key="audio_sharing_device_volume_group"
         android:title="Devices listening"
diff --git a/res/xml/connected_devices.xml b/res/xml/connected_devices.xml
index 1d2dd24..34a5798 100644
--- a/res/xml/connected_devices.xml
+++ b/res/xml/connected_devices.xml
@@ -23,8 +23,8 @@
     <com.android.settings.slices.SlicePreference
         android:key="bt_nearby_slice"
         android:title="@string/summary_placeholder"
-        settings:controller="com.android.settings.slices.SlicePreferenceController"
-        settings:allowDividerBelow="true"/>
+        settings:allowDividerBelow="true"
+        settings:controller="com.android.settings.slices.SlicePreferenceController" />
 
     <PreferenceCategory
         android:key="audio_sharing_device_list"
@@ -32,33 +32,33 @@
         settings:controller="com.android.settings.connecteddevice.audiosharing.AudioSharingDevicePreferenceController">
         <Preference
             android:fragment="com.android.settings.connecteddevice.audiosharing.AudioSharingDashboardFragment"
-            android:key="connected_device_audio_sharing_settings"
-            android:title="@string/audio_sharing_title"
             android:icon="@drawable/ic_bt_audio_sharing"
+            android:key="connected_device_audio_sharing_settings"
             android:order="10"
-            settings:controller="com.android.settings.connecteddevice.audiosharing.AudioSharingPreferenceController"/>
+            android:title="@string/audio_sharing_title"
+            settings:searchable="false" />
     </PreferenceCategory>
 
     <PreferenceCategory
         android:key="available_device_list"
         android:title="@string/connected_device_media_device_title"
-        settings:controller="com.android.settings.connecteddevice.AvailableMediaDeviceGroupController"/>
+        settings:controller="com.android.settings.connecteddevice.AvailableMediaDeviceGroupController" />
 
     <PreferenceCategory
         android:key="connected_device_list"
         android:title="@string/connected_device_other_device_title"
-        settings:controller="com.android.settings.connecteddevice.ConnectedDeviceGroupController"/>
+        settings:controller="com.android.settings.connecteddevice.ConnectedDeviceGroupController" />
 
     <com.android.settingslib.RestrictedPreference
-        android:key="add_bt_devices"
-        android:title="@string/bluetooth_pairing_pref_title"
-        android:icon="@drawable/ic_add_24dp"
-        android:summary="@string/connected_device_add_device_summary"
         android:fragment="com.android.settings.bluetooth.BluetoothPairingDetail"
+        android:icon="@drawable/ic_add_24dp"
+        android:key="add_bt_devices"
+        android:summary="@string/connected_device_add_device_summary"
+        android:title="@string/bluetooth_pairing_pref_title"
+        settings:controller="com.android.settings.connecteddevice.AddDevicePreferenceController"
         settings:keywords="@string/keywords_add_bt_device"
-        settings:userRestriction="no_config_bluetooth"
         settings:useAdminDisabledSummary="true"
-        settings:controller="com.android.settings.connecteddevice.AddDevicePreferenceController"/>
+        settings:userRestriction="no_config_bluetooth" />
 
     <PreferenceCategory
         android:key="previously_connected_devices"
@@ -66,12 +66,12 @@
         settings:controller="com.android.settings.connecteddevice.PreviouslyConnectedDevicePreferenceController">
 
         <Preference
-            android:key="previously_connected_devices_see_all"
-            android:title="@string/previous_connected_see_all"
+            android:fragment="com.android.settings.connecteddevice.PreviouslyConnectedDeviceDashboardFragment"
             android:icon="@drawable/ic_chevron_right_24dp"
+            android:key="previously_connected_devices_see_all"
             android:order="10"
-            settings:searchable="false"
-            android:fragment="com.android.settings.connecteddevice.PreviouslyConnectedDeviceDashboardFragment"/>
+            android:title="@string/previous_connected_see_all"
+            settings:searchable="false" />
     </PreferenceCategory>
 
     <PreferenceCategory
@@ -81,27 +81,27 @@
             "com.android.settings.connecteddevice.fastpair.FastPairDevicePreferenceController">
 
         <Preference
-            android:key="fast_pair_devices_see_all"
-            android:title="@string/connected_device_fast_pair_device_see_all"
-            android:icon="@drawable/ic_chevron_right_24dp"
-            android:order="10"
-            settings:searchable="false"
             android:fragment=
-                "com.android.settings.connecteddevice.fastpair.FastPairDeviceDashboardFragment"/>
+                "com.android.settings.connecteddevice.fastpair.FastPairDeviceDashboardFragment"
+            android:icon="@drawable/ic_chevron_right_24dp"
+            android:key="fast_pair_devices_see_all"
+            android:order="10"
+            android:title="@string/connected_device_fast_pair_device_see_all"
+            settings:searchable="false" />
     </PreferenceCategory>
 
     <Preference
-        android:key="connection_preferences"
-        android:title="@string/connected_device_connections_title"
-        android:summary="@string/summary_placeholder"
         android:fragment="com.android.settings.connecteddevice.AdvancedConnectedDeviceDashboardFragment"
+        android:key="connection_preferences"
+        android:summary="@string/summary_placeholder"
+        android:title="@string/connected_device_connections_title"
         settings:allowDividerAbove="true"
-        settings:controller="com.android.settings.connecteddevice.AdvancedConnectedDeviceController"/>
+        settings:controller="com.android.settings.connecteddevice.AdvancedConnectedDeviceController" />
 
     <com.android.settingslib.widget.FooterPreference
         android:key="discoverable_footer"
-        android:title="@string/bluetooth_off_footer"
         android:selectable="false"
+        android:title="@string/bluetooth_off_footer"
         settings:controller="com.android.settings.connecteddevice.DiscoverableFooterPreferenceController">
     </com.android.settingslib.widget.FooterPreference>
 
diff --git a/res/xml/connected_devices_advanced.xml b/res/xml/connected_devices_advanced.xml
index 364dd3d..b088791 100644
--- a/res/xml/connected_devices_advanced.xml
+++ b/res/xml/connected_devices_advanced.xml
@@ -21,57 +21,59 @@
 
     <Preference
         android:fragment="com.android.settings.connecteddevice.BluetoothDashboardFragment"
-        android:key="bluetooth_switchbar_screen"
-        android:title="@string/bluetooth_settings_title"
         android:icon="@*android:drawable/ic_settings_bluetooth"
-        android:order="-9"/>
+        android:key="bluetooth_switchbar_screen"
+        android:order="-10"
+        android:title="@string/bluetooth_settings_title" />
 
     <Preference
         android:fragment="com.android.settings.connecteddevice.audiosharing.AudioSharingDashboardFragment"
-        android:key="audio_sharing_settings"
-        android:title="@string/audio_sharing_title"
         android:icon="@drawable/ic_bt_audio_sharing"
-        settings:controller="com.android.settings.connecteddevice.audiosharing.AudioSharingPreferenceController"/>
+        android:key="audio_sharing_settings"
+        android:order="-9"
+        android:title="@string/audio_sharing_title"
+        settings:controller="com.android.settings.connecteddevice.audiosharing.AudioSharingPreferenceController"
+        settings:searchable="true" />
 
     <com.android.settingslib.RestrictedPreference
         android:fragment="com.android.settings.connecteddevice.NfcAndPaymentFragment"
-        android:key="nfc_and_payment_settings"
-        android:title="@string/nfc_quick_toggle_title"
         android:icon="@drawable/ic_nfc"
+        android:key="nfc_and_payment_settings"
         android:order="-7"
-        settings:searchable="false"
+        android:title="@string/nfc_quick_toggle_title"
         settings:controller="com.android.settings.connecteddevice.NfcAndPaymentFragmentController"
-        settings:userRestriction="no_near_field_communication_radio"
-        settings:useAdminDisabledSummary="true"/>
+        settings:searchable="false"
+        settings:useAdminDisabledSummary="true"
+        settings:userRestriction="no_near_field_communication_radio" />
 
     <Preference
         android:fragment="com.android.settings.wfd.WifiDisplaySettings"
-        android:key="wifi_display_settings"
-        android:title="@string/wifi_display_settings_title"
         android:icon="@drawable/ic_cast_24dp"
+        android:key="wifi_display_settings"
         android:order="-6"
+        android:title="@string/wifi_display_settings_title"
         settings:controller="com.android.settings.wfd.WifiDisplayPreferenceController"
-        settings:keywords="@string/keywords_wifi_display_settings"/>
+        settings:keywords="@string/keywords_wifi_display_settings" />
 
     <com.android.settingslib.RestrictedPreference
-        android:key="connected_device_printing"
-        android:title="@string/print_settings"
-        android:summary="@string/summary_placeholder"
-        android:icon="@*android:drawable/ic_settings_print"
         android:fragment="com.android.settings.print.PrintSettingsFragment"
-        android:order="-3"/>
+        android:icon="@*android:drawable/ic_settings_print"
+        android:key="connected_device_printing"
+        android:order="-3"
+        android:summary="@string/summary_placeholder"
+        android:title="@string/print_settings" />
 
     <com.android.settingslib.RestrictedSwitchPreference
         android:key="uwb_settings"
-        android:title="@string/uwb_settings_title"
         android:order="100"
         android:summary="@string/summary_placeholder"
+        android:title="@string/uwb_settings_title"
         settings:controller="com.android.settings.uwb.UwbPreferenceController"
-        settings:userRestriction="no_ultra_wideband_radio"
-        settings:useAdminDisabledSummary="true"/>
+        settings:useAdminDisabledSummary="true"
+        settings:userRestriction="no_ultra_wideband_radio" />
 
     <PreferenceCategory
         android:key="dashboard_tile_placeholder"
-        android:order="-8"/>
+        android:order="-8" />
 
 </PreferenceScreen>
diff --git a/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceController.java b/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceController.java
index 294e8b2..16c9888 100644
--- a/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceController.java
+++ b/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceController.java
@@ -16,22 +16,123 @@
 
 package com.android.settings.connecteddevice.audiosharing;
 
+import android.bluetooth.BluetoothLeBroadcast;
+import android.bluetooth.BluetoothLeBroadcastMetadata;
 import android.content.Context;
 
-import com.android.settings.core.BasePreferenceController;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.lifecycle.DefaultLifecycleObserver;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
 
-public class AudioSharingPreferenceController extends BasePreferenceController {
+import com.android.settings.bluetooth.Utils;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.bluetooth.BluetoothCallback;
+import com.android.settingslib.bluetooth.LocalBluetoothLeBroadcast;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+
+public class AudioSharingPreferenceController extends BasePreferenceController
+        implements DefaultLifecycleObserver, BluetoothCallback {
     private static final String TAG = "AudioSharingPreferenceController";
 
-    private Context mContext;
+    private final LocalBluetoothManager mLocalBtManager;
+    private final Executor mExecutor;
+    @Nullable private LocalBluetoothLeBroadcast mBroadcast = null;
+    @Nullable private Preference mPreference;
+
+    private final BluetoothLeBroadcast.Callback mBroadcastCallback =
+            new BluetoothLeBroadcast.Callback() {
+                @Override
+                public void onBroadcastStarted(int reason, int broadcastId) {
+                    if (mPreference != null) {
+                        refreshSummary(mPreference);
+                    }
+                }
+
+                @Override
+                public void onBroadcastStartFailed(int reason) {}
+
+                @Override
+                public void onBroadcastMetadataChanged(
+                        int broadcastId, @NonNull BluetoothLeBroadcastMetadata metadata) {}
+
+                @Override
+                public void onBroadcastStopped(int reason, int broadcastId) {
+                    if (mPreference != null) {
+                        refreshSummary(mPreference);
+                    }
+                }
+
+                @Override
+                public void onBroadcastStopFailed(int reason) {}
+
+                @Override
+                public void onBroadcastUpdated(int reason, int broadcastId) {}
+
+                @Override
+                public void onBroadcastUpdateFailed(int reason, int broadcastId) {}
+
+                @Override
+                public void onPlaybackStarted(int reason, int broadcastId) {}
+
+                @Override
+                public void onPlaybackStopped(int reason, int broadcastId) {}
+            };
 
     public AudioSharingPreferenceController(Context context, String preferenceKey) {
         super(context, preferenceKey);
-        mContext = context;
+        mLocalBtManager = Utils.getLocalBtManager(context);
+        if (mLocalBtManager != null) {
+            mBroadcast = mLocalBtManager.getProfileManager().getLeAudioBroadcastProfile();
+        }
+        mExecutor = Executors.newSingleThreadExecutor();
+    }
+
+    @Override
+    public void onStart(@NonNull LifecycleOwner owner) {
+        if (mLocalBtManager != null) {
+            mLocalBtManager.getEventManager().registerCallback(this);
+        }
+        if (mBroadcast != null) {
+            mBroadcast.registerServiceCallBack(mExecutor, mBroadcastCallback);
+        }
+    }
+
+    @Override
+    public void onStop(@NonNull LifecycleOwner owner) {
+        if (mLocalBtManager != null) {
+            mLocalBtManager.getEventManager().unregisterCallback(this);
+        }
+        if (mBroadcast != null) {
+            mBroadcast.unregisterServiceCallBack(mBroadcastCallback);
+        }
+    }
+
+    @Override
+    public void displayPreference(@NonNull PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
     }
 
     @Override
     public int getAvailabilityStatus() {
         return AudioSharingUtils.isFeatureEnabled() ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
+
+    @Override
+    public CharSequence getSummary() {
+        return AudioSharingUtils.isBroadcasting(mLocalBtManager) ? "On" : "Off";
+    }
+
+    @Override
+    public void onBluetoothStateChanged(@AdapterState int bluetoothState) {
+        if (mPreference != null) {
+            refreshSummary(mPreference);
+        }
+    }
 }
diff --git a/tests/robotests/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceControllerTest.java
new file mode 100644
index 0000000..145c08c
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/connecteddevice/audiosharing/AudioSharingPreferenceControllerTest.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+package com.android.settings.connecteddevice.audiosharing;
+
+import static android.bluetooth.BluetoothAdapter.STATE_OFF;
+import static android.bluetooth.BluetoothAdapter.STATE_ON;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothLeBroadcast;
+import android.bluetooth.BluetoothStatusCodes;
+import android.content.Context;
+import android.platform.test.annotations.RequiresFlagsDisabled;
+import android.platform.test.annotations.RequiresFlagsEnabled;
+import android.platform.test.flag.junit.CheckFlagsRule;
+import android.platform.test.flag.junit.DeviceFlagsValueProvider;
+
+import androidx.lifecycle.LifecycleOwner;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.bluetooth.Utils;
+import com.android.settings.flags.Flags;
+import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
+import com.android.settings.testutils.shadow.ShadowBluetoothUtils;
+import com.android.settingslib.bluetooth.BluetoothEventManager;
+import com.android.settingslib.bluetooth.LocalBluetoothLeBroadcast;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+import com.android.settingslib.bluetooth.LocalBluetoothProfileManager;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadow.api.Shadow;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = {ShadowBluetoothAdapter.class, ShadowBluetoothUtils.class})
+public class AudioSharingPreferenceControllerTest {
+    private static final String PREF_KEY = "audio_sharing_settings";
+    private static final String SUMMARY_ON = "On";
+    private static final String SUMMARY_OFF = "Off";
+
+    @Rule public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    @Rule
+    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();
+
+    @Spy Context mContext = ApplicationProvider.getApplicationContext();
+    @Mock private PreferenceScreen mScreen;
+    @Mock private LocalBluetoothManager mLocalBtManager;
+    @Mock private BluetoothEventManager mBtEventManager;
+    @Mock private LocalBluetoothProfileManager mLocalBtProfileManager;
+    @Mock private LocalBluetoothLeBroadcast mBroadcast;
+    private AudioSharingPreferenceController mController;
+    private ShadowBluetoothAdapter mShadowBluetoothAdapter;
+    private LocalBluetoothManager mLocalBluetoothManager;
+    private Lifecycle mLifecycle;
+    private LifecycleOwner mLifecycleOwner;
+    private Preference mPreference;
+
+    @Before
+    public void setUp() {
+        mShadowBluetoothAdapter = Shadow.extract(BluetoothAdapter.getDefaultAdapter());
+        mShadowBluetoothAdapter.setEnabled(true);
+        mShadowBluetoothAdapter.setIsLeAudioBroadcastSourceSupported(
+                BluetoothStatusCodes.FEATURE_SUPPORTED);
+        mShadowBluetoothAdapter.setIsLeAudioBroadcastAssistantSupported(
+                BluetoothStatusCodes.FEATURE_SUPPORTED);
+        mLifecycleOwner = () -> mLifecycle;
+        mLifecycle = new Lifecycle(mLifecycleOwner);
+        ShadowBluetoothUtils.sLocalBluetoothManager = mLocalBtManager;
+        mLocalBluetoothManager = Utils.getLocalBtManager(mContext);
+        when(mLocalBluetoothManager.getEventManager()).thenReturn(mBtEventManager);
+        when(mLocalBluetoothManager.getProfileManager()).thenReturn(mLocalBtProfileManager);
+        when(mLocalBtProfileManager.getLeAudioBroadcastProfile()).thenReturn(mBroadcast);
+        mController = new AudioSharingPreferenceController(mContext, PREF_KEY);
+        mPreference = new Preference(mContext);
+        when(mScreen.findPreference(PREF_KEY)).thenReturn(mPreference);
+    }
+
+    @Test
+    public void onStart_registerCallback() {
+        mController.onStart(mLifecycleOwner);
+        verify(mBtEventManager).registerCallback(mController);
+        verify(mBroadcast).registerServiceCallBack(any(), any(BluetoothLeBroadcast.Callback.class));
+    }
+
+    @Test
+    public void onStop_unregisterCallback() {
+        mController.onStop(mLifecycleOwner);
+        verify(mBtEventManager).unregisterCallback(mController);
+        verify(mBroadcast).unregisterServiceCallBack(any(BluetoothLeBroadcast.Callback.class));
+    }
+
+    @Test
+    @RequiresFlagsEnabled(Flags.FLAG_ENABLE_LE_AUDIO_SHARING)
+    public void getAvailabilityStatus_flagOn() {
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    @RequiresFlagsDisabled(Flags.FLAG_ENABLE_LE_AUDIO_SHARING)
+    public void getAvailabilityStatus_flagOff() {
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    public void getSummary_broadcastOn() {
+        when(mBroadcast.isEnabled(any())).thenReturn(true);
+        assertThat(mController.getSummary().toString()).isEqualTo(SUMMARY_ON);
+    }
+
+    @Test
+    public void getSummary_broadcastOff() {
+        when(mBroadcast.isEnabled(any())).thenReturn(false);
+        assertThat(mController.getSummary().toString()).isEqualTo(SUMMARY_OFF);
+    }
+
+    @Test
+    public void onBluetoothStateChanged_refreshSummary() {
+        mController.displayPreference(mScreen);
+        when(mBroadcast.isEnabled(any())).thenReturn(true);
+        mController.onBluetoothStateChanged(STATE_ON);
+        assertThat(mPreference.getSummary().toString()).isEqualTo(SUMMARY_ON);
+        when(mBroadcast.isEnabled(any())).thenReturn(false);
+        mController.onBluetoothStateChanged(STATE_OFF);
+        assertThat(mPreference.getSummary().toString()).isEqualTo(SUMMARY_OFF);
+    }
+}