Merge changes from topic "migrate-sc-bt" into sc-v2-dev-plus-aosp

* changes:
  Migrating BT files into packages/modules/Bluetooth
  Merge history of Bluetooth API from frameworks/base

1 files changed, 829 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothLeAudio.java b/framework/java/android/bluetooth/BluetoothLeAudio.java
new file mode 100644
index 0000000000..15db686b3b
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothLeAudio.java
@@ -0,0 +1,829 @@
+/*
+ * Copyright 2020 HIMSA II K/S - www.himsa.com.
+ * Represented by EHIMA - www.ehima.com
+ *
+ * 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 android.bluetooth;
+
+import static android.bluetooth.BluetoothUtils.getSyncTimeout;
+
+import android.Manifest;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.bluetooth.annotations.RequiresBluetoothConnectPermission;
+import android.bluetooth.annotations.RequiresLegacyBluetoothPermission;
+import android.content.AttributionSource;
+import android.content.Context;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.CloseGuard;
+import android.util.Log;
+
+import com.android.modules.utils.SynchronousResultReceiver;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * This class provides the public APIs to control the LeAudio profile.
+ *
+ * <p>BluetoothLeAudio is a proxy object for controlling the Bluetooth LE Audio
+ * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
+ * the BluetoothLeAudio proxy object.
+ *
+ * <p> Android only supports one set of connected Bluetooth LeAudio device at a time. Each
+ * method is protected with its appropriate permission.
+ */
+public final class BluetoothLeAudio implements BluetoothProfile, AutoCloseable {
+    private static final String TAG = "BluetoothLeAudio";
+    private static final boolean DBG = false;
+    private static final boolean VDBG = false;
+
+    private CloseGuard mCloseGuard;
+
+    /**
+     * Intent used to broadcast the change in connection state of the LeAudio
+     * profile. Please note that in the binaural case, there will be two different LE devices for
+     * the left and right side and each device will have their own connection state changes.
+     *
+     * <p>This intent will have 3 extras:
+     * <ul>
+     * <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
+     * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
+     * </ul>
+     *
+     * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
+     * {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING},
+     * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_LE_AUDIO_CONNECTION_STATE_CHANGED =
+            "android.bluetooth.action.LE_AUDIO_CONNECTION_STATE_CHANGED";
+
+    /**
+     * Intent used to broadcast the selection of a connected device as active.
+     *
+     * <p>This intent will have one extra:
+     * <ul>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. It can
+     * be null if no device is active. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_LE_AUDIO_ACTIVE_DEVICE_CHANGED =
+            "android.bluetooth.action.LE_AUDIO_ACTIVE_DEVICE_CHANGED";
+
+    /**
+     * Intent used to broadcast group node status information.
+     *
+     * <p>This intent will have 3 extra:
+     * <ul>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. It can
+     * be null if no device is active. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_GROUP_ID} - Group id. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_GROUP_NODE_STATUS} - Group node status. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_LE_AUDIO_GROUP_NODE_STATUS_CHANGED =
+            "android.bluetooth.action.LE_AUDIO_GROUP_NODE_STATUS_CHANGED";
+
+
+    /**
+     * Intent used to broadcast group status information.
+     *
+     * <p>This intent will have 4 extra:
+     * <ul>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. It can
+     * be null if no device is active. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_GROUP_ID} - Group id. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_GROUP_STATUS} - Group status. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_LE_AUDIO_GROUP_STATUS_CHANGED =
+            "android.bluetooth.action.LE_AUDIO_GROUP_STATUS_CHANGED";
+
+    /**
+     * Intent used to broadcast group audio configuration changed information.
+     *
+     * <p>This intent will have 5 extra:
+     * <ul>
+     * <li> {@link #EXTRA_LE_AUDIO_GROUP_ID} - Group id. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_DIRECTION} - Direction as bit mask. </li>
+     * <li> {@link #EXTRA_LE_AUDIO_SINK_LOCATION} - Sink location as per Bluetooth Assigned
+     * Numbers </li>
+     * <li> {@link #EXTRA_LE_AUDIO_SOURCE_LOCATION} - Source location as per Bluetooth Assigned
+     * Numbers </li>
+     * <li> {@link #EXTRA_LE_AUDIO_AVAILABLE_CONTEXTS} - Available contexts for group as per
+     * Bluetooth Assigned Numbers </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_LE_AUDIO_CONF_CHANGED =
+            "android.bluetooth.action.LE_AUDIO_CONF_CHANGED";
+
+    /**
+     * Indicates unspecified audio content.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_UNSPECIFIED = 0x0001;
+
+    /**
+     * Indicates conversation between humans as, for example, in telephony or video calls.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_COMMUNICATION = 0x0002;
+
+    /**
+     * Indicates media as, for example, in music, public radio, podcast or video soundtrack.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_MEDIA = 0x0004;
+
+    /**
+     * Indicates instructional audio as, for example, in navigation, traffic announcements
+     * or user guidance.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_INSTRUCTIONAL = 0x0008;
+
+    /**
+     * Indicates attention seeking audio as, for example, in beeps signalling arrival of a message
+     * or keyboard clicks.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_ATTENTION_SEEKING = 0x0010;
+
+    /**
+     * Indicates immediate alerts as, for example, in a low battery alarm, timer expiry or alarm
+     * clock.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_IMMEDIATE_ALERT = 0x0020;
+
+    /**
+     * Indicates man machine communication as, for example, with voice recognition or virtual
+     * assistant.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_MAN_MACHINE = 0x0040;
+
+    /**
+     * Indicates emergency alerts as, for example, with fire alarms or other urgent alerts.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_EMERGENCY_ALERT = 0x0080;
+
+    /**
+     * Indicates ringtone as in a call alert.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_RINGTONE = 0x0100;
+
+    /**
+     * Indicates audio associated with a television program and/or with metadata conforming to the
+     * Bluetooth Broadcast TV profile.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_TV = 0x0200;
+
+    /**
+     * Indicates audio associated with a low latency live audio stream.
+     *
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_LIVE = 0x0400;
+
+    /**
+     * Indicates audio associated with a video game stream.
+     * @hide
+     */
+    public static final int CONTEXT_TYPE_GAME = 0x0800;
+
+    /**
+     * This represents an invalid group ID.
+     *
+     * @hide
+     */
+    public static final int GROUP_ID_INVALID = IBluetoothLeAudio.LE_AUDIO_GROUP_ID_INVALID;
+
+    /**
+     * Contains group id.
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_GROUP_ID =
+            "android.bluetooth.extra.LE_AUDIO_GROUP_ID";
+
+    /**
+     * Contains group node status, can be any of
+     * <p>
+     * <ul>
+     * <li> {@link #GROUP_NODE_ADDED} </li>
+     * <li> {@link #GROUP_NODE_REMOVED} </li>
+     * </ul>
+     * <p>
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_GROUP_NODE_STATUS =
+            "android.bluetooth.extra.LE_AUDIO_GROUP_NODE_STATUS";
+
+    /**
+     * Contains group status, can be any of
+     *
+     * <p>
+     * <ul>
+     * <li> {@link #GROUP_STATUS_ACTIVE} </li>
+     * <li> {@link #GROUP_STATUS_INACTIVE} </li>
+     * </ul>
+     * <p>
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_GROUP_STATUS =
+            "android.bluetooth.extra.LE_AUDIO_GROUP_STATUS";
+
+    /**
+     * Contains bit mask for direction, bit 0 set when Sink, bit 1 set when Source.
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_DIRECTION =
+            "android.bluetooth.extra.LE_AUDIO_DIRECTION";
+
+    /**
+     * Contains source location as per Bluetooth Assigned Numbers
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_SOURCE_LOCATION =
+            "android.bluetooth.extra.LE_AUDIO_SOURCE_LOCATION";
+
+    /**
+     * Contains sink location as per Bluetooth Assigned Numbers
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_SINK_LOCATION =
+            "android.bluetooth.extra.LE_AUDIO_SINK_LOCATION";
+
+    /**
+     * Contains available context types for group as per Bluetooth Assigned Numbers
+     * @hide
+     */
+    public static final String EXTRA_LE_AUDIO_AVAILABLE_CONTEXTS =
+            "android.bluetooth.extra.LE_AUDIO_AVAILABLE_CONTEXTS";
+
+    private final BluetoothAdapter mAdapter;
+    private final AttributionSource mAttributionSource;
+    /**
+     * Indicating that group is Active ( Audio device is available )
+     * @hide
+     */
+    public static final int GROUP_STATUS_ACTIVE = IBluetoothLeAudio.GROUP_STATUS_ACTIVE;
+
+    /**
+     * Indicating that group is Inactive ( Audio device is not available )
+     * @hide
+     */
+    public static final int GROUP_STATUS_INACTIVE = IBluetoothLeAudio.GROUP_STATUS_INACTIVE;
+
+    /**
+     * Indicating that node has been added to the group.
+     * @hide
+     */
+    public static final int GROUP_NODE_ADDED = IBluetoothLeAudio.GROUP_NODE_ADDED;
+
+    /**
+     * Indicating that node has been removed from the group.
+     * @hide
+     */
+    public static final int GROUP_NODE_REMOVED = IBluetoothLeAudio.GROUP_NODE_REMOVED;
+
+    private final BluetoothProfileConnector<IBluetoothLeAudio> mProfileConnector =
+            new BluetoothProfileConnector(this, BluetoothProfile.LE_AUDIO, "BluetoothLeAudio",
+                    IBluetoothLeAudio.class.getName()) {
+                @Override
+                public IBluetoothLeAudio getServiceInterface(IBinder service) {
+                    return IBluetoothLeAudio.Stub.asInterface(service);
+                }
+    };
+
+    /**
+     * Create a BluetoothLeAudio proxy object for interacting with the local
+     * Bluetooth LeAudio service.
+     */
+    /* package */ BluetoothLeAudio(Context context, ServiceListener listener,
+            BluetoothAdapter adapter) {
+        mAdapter = adapter;
+        mAttributionSource = adapter.getAttributionSource();
+        mProfileConnector.connect(context, listener);
+        mCloseGuard = new CloseGuard();
+        mCloseGuard.open("close");
+    }
+
+    /**
+     * @hide
+     */
+    public void close() {
+        mProfileConnector.disconnect();
+    }
+
+    private IBluetoothLeAudio getService() {
+        return mProfileConnector.getService();
+    }
+
+    protected void finalize() {
+        if (mCloseGuard != null) {
+            mCloseGuard.warnIfOpen();
+        }
+        close();
+    }
+
+    /**
+     * Initiate connection to a profile of the remote bluetooth device.
+     *
+     * <p> This API returns false in scenarios like the profile on the
+     * device is already connected or Bluetooth is not turned on.
+     * When this API returns true, it is guaranteed that
+     * connection state intent for the profile will be broadcasted with
+     * the state. Users can get the connection state of the profile
+     * from this intent.
+     *
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean connect(@Nullable BluetoothDevice device) {
+        if (DBG) log("connect(" + device + ")");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.connect(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Initiate disconnection from a profile
+     *
+     * <p> This API will return false in scenarios like the profile on the
+     * Bluetooth device is not in connected state etc. When this API returns,
+     * true, it is guaranteed that the connection state change
+     * intent will be broadcasted with the state. Users can get the
+     * disconnection state of the profile from this intent.
+     *
+     * <p> If the disconnection is initiated by a remote device, the state
+     * will transition from {@link #STATE_CONNECTED} to
+     * {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the
+     * host (local) device the state will transition from
+     * {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to
+     * state {@link #STATE_DISCONNECTED}. The transition to
+     * {@link #STATE_DISCONNECTING} can be used to distinguish between the
+     * two scenarios.
+     *
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean disconnect(@Nullable BluetoothDevice device) {
+        if (DBG) log("disconnect(" + device + ")");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.disconnect(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @NonNull List<BluetoothDevice> getConnectedDevices() {
+        if (VDBG) log("getConnectedDevices()");
+        final IBluetoothLeAudio service = getService();
+        final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<List<BluetoothDevice>> recv =
+                        new SynchronousResultReceiver();
+                service.getConnectedDevices(mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @NonNull List<BluetoothDevice> getDevicesMatchingConnectionStates(
+            @NonNull int[] states) {
+        if (VDBG) log("getDevicesMatchingStates()");
+        final IBluetoothLeAudio service = getService();
+        final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<List<BluetoothDevice>> recv =
+                        new SynchronousResultReceiver();
+                service.getDevicesMatchingConnectionStates(states, mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @BtProfileState int getConnectionState(@NonNull BluetoothDevice device) {
+        if (VDBG) log("getState(" + device + ")");
+        final IBluetoothLeAudio service = getService();
+        final int defaultValue = BluetoothProfile.STATE_DISCONNECTED;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getConnectionState(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Select a connected device as active.
+     *
+     * The active device selection is per profile. An active device's
+     * purpose is profile-specific. For example, LeAudio audio
+     * streaming is to the active LeAudio device. If a remote device
+     * is not connected, it cannot be selected as active.
+     *
+     * <p> This API returns false in scenarios like the profile on the
+     * device is not connected or Bluetooth is not turned on.
+     * When this API returns true, it is guaranteed that the
+     * {@link #ACTION_LE_AUDIO_ACTIVE_DEVICE_CHANGED} intent will be broadcasted
+     * with the active device.
+     *
+     *
+     * @param device the remote Bluetooth device. Could be null to clear
+     * the active device and stop streaming audio to a Bluetooth device.
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean setActiveDevice(@Nullable BluetoothDevice device) {
+        if (DBG) log("setActiveDevice(" + device + ")");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && ((device == null) || isValidDevice(device))) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.setActiveDevice(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Get the connected LeAudio devices that are active
+     *
+     * @return the list of active devices. Returns empty list on error.
+     * @hide
+     */
+    @NonNull
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public List<BluetoothDevice> getActiveDevices() {
+        if (VDBG) log("getActiveDevice()");
+        final IBluetoothLeAudio service = getService();
+        final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<List<BluetoothDevice>> recv =
+                        new SynchronousResultReceiver();
+                service.getActiveDevices(mAttributionSource, recv);
+                return Attributable.setAttributionSource(
+                        recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
+                        mAttributionSource);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Get device group id. Devices with same group id belong to same group (i.e left and right
+     * earbud)
+     * @param device LE Audio capable device
+     * @return group id that this device currently belongs to
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public int getGroupId(@NonNull BluetoothDevice device) {
+        if (VDBG) log("getGroupId()");
+        final IBluetoothLeAudio service = getService();
+        final int defaultValue = GROUP_ID_INVALID;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getGroupId(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Set volume for the streaming devices
+     *
+     * @param volume volume to set
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED})
+    public void setVolume(int volume) {
+        if (VDBG) log("setVolume(vol: " + volume + " )");
+        final IBluetoothLeAudio service = getService();
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver recv = new SynchronousResultReceiver();
+                service.setVolume(volume, mAttributionSource, recv);
+                recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(null);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+    }
+
+    /**
+     * Add device to the given group.
+     * @param group_id group ID the device is being added to
+     * @param device the active device
+     * @return true on success, otherwise false
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED
+    })
+    public boolean groupAddNode(int group_id, @NonNull BluetoothDevice device) {
+        if (VDBG) log("groupAddNode()");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.groupAddNode(group_id, device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Remove device from a given group.
+     * @param group_id group ID the device is being removed from
+     * @param device the active device
+     * @return true on success, otherwise false
+     *
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED
+    })
+    public boolean groupRemoveNode(int group_id, @NonNull BluetoothDevice device) {
+        if (VDBG) log("groupRemoveNode()");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled()) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.groupRemoveNode(group_id, device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Set connection policy of the profile
+     *
+     * <p> The device should already be paired.
+     * Connection policy can be one of {@link #CONNECTION_POLICY_ALLOWED},
+     * {@link #CONNECTION_POLICY_FORBIDDEN}, {@link #CONNECTION_POLICY_UNKNOWN}
+     *
+     * @param device Paired bluetooth device
+     * @param connectionPolicy is the connection policy to set to for this profile
+     * @return true if connectionPolicy is set, false on error
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setConnectionPolicy(@NonNull BluetoothDevice device,
+            @ConnectionPolicy int connectionPolicy) {
+        if (DBG) log("setConnectionPolicy(" + device + ", " + connectionPolicy + ")");
+        final IBluetoothLeAudio service = getService();
+        final boolean defaultValue = false;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && isValidDevice(device)
+                    && (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN
+                        || connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED)) {
+            try {
+                final SynchronousResultReceiver<Boolean> recv = new SynchronousResultReceiver();
+                service.setConnectionPolicy(device, connectionPolicy, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Get the connection policy of the profile.
+     *
+     * <p> The connection policy can be any of:
+     * {@link #CONNECTION_POLICY_ALLOWED}, {@link #CONNECTION_POLICY_FORBIDDEN},
+     * {@link #CONNECTION_POLICY_UNKNOWN}
+     *
+     * @param device Bluetooth device
+     * @return connection policy of the device
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @ConnectionPolicy int getConnectionPolicy(@Nullable BluetoothDevice device) {
+        if (VDBG) log("getConnectionPolicy(" + device + ")");
+        final IBluetoothLeAudio service = getService();
+        final int defaultValue = BluetoothProfile.CONNECTION_POLICY_FORBIDDEN;
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+            if (DBG) log(Log.getStackTraceString(new Throwable()));
+        } else if (mAdapter.isEnabled() && isValidDevice(device)) {
+            try {
+                final SynchronousResultReceiver<Integer> recv = new SynchronousResultReceiver();
+                service.getConnectionPolicy(device, mAttributionSource, recv);
+                return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
+            } catch (RemoteException | TimeoutException e) {
+                Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
+            }
+        }
+        return defaultValue;
+    }
+
+
+    /**
+     * Helper for converting a state to a string.
+     *
+     * For debug use only - strings are not internationalized.
+     *
+     * @hide
+     */
+    public static String stateToString(int state) {
+        switch (state) {
+            case STATE_DISCONNECTED:
+                return "disconnected";
+            case STATE_CONNECTING:
+                return "connecting";
+            case STATE_CONNECTED:
+                return "connected";
+            case STATE_DISCONNECTING:
+                return "disconnecting";
+            default:
+                return "<unknown state " + state + ">";
+        }
+    }
+
+    private boolean isValidDevice(@Nullable BluetoothDevice device) {
+        if (device == null) return false;
+
+        if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) return true;
+        return false;
+    }
+
+    private static void log(String msg) {
+        Log.d(TAG, msg);
+    }
+}