Hearing Aid profile

This is implementation of Hearing Aid Profile that will in future
be connected to Bluetooth Manager - see TODOs in BluetoothHearingAid.java

Bug: 69623109
Test: compilation. Manual test with HA.
Change-Id: I79643ea1e14e9df7f5771169359c964a60c56618

9 files changed, 1008 insertions, 1 deletions

diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java
index 6c8fe2e399fa..dc761521fbdc 100644
--- a/core/java/android/bluetooth/BluetoothAdapter.java
+++ b/core/java/android/bluetooth/BluetoothAdapter.java
@@ -2303,6 +2303,9 @@ public final class BluetoothAdapter {
         } else if (profile == BluetoothProfile.HID_DEVICE) {
             BluetoothHidDevice hidDevice = new BluetoothHidDevice(context, listener);
             return true;
+        } else if (profile == BluetoothProfile.HEARING_AID) {
+            BluetoothHearingAid hearingAid = new BluetoothHearingAid(context, listener);
+            return true;
         } else {
             return false;
         }
@@ -2385,6 +2388,9 @@ public final class BluetoothAdapter {
                 BluetoothHidDevice hidDevice = (BluetoothHidDevice) proxy;
                 hidDevice.close();
                 break;
+            case BluetoothProfile.HEARING_AID:
+                BluetoothHearingAid hearingAid = (BluetoothHearingAid) proxy;
+                hearingAid.close();
         }
     }
 
diff --git a/core/java/android/bluetooth/BluetoothHearingAid.java b/core/java/android/bluetooth/BluetoothHearingAid.java
new file mode 100644
index 000000000000..647e0d033fb7
--- /dev/null
+++ b/core/java/android/bluetooth/BluetoothHearingAid.java
@@ -0,0 +1,693 @@
+/*
+ * Copyright 2018 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 android.bluetooth;
+
+import android.Manifest;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * This class provides the public APIs to control the Bluetooth Hearing Aid
+ * profile.
+ *
+ * <p>BluetoothHearingAid is a proxy object for controlling the Bluetooth Hearing Aid
+ * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
+ * the BluetoothHearingAid proxy object.
+ *
+ * <p> Each method is protected with its appropriate permission.
+ * @hide
+ */
+public final class BluetoothHearingAid implements BluetoothProfile {
+    private static final String TAG = "BluetoothHearingAid";
+    private static final boolean DBG = false;
+    private static final boolean VDBG = false;
+
+    /**
+     * Intent used to broadcast the change in connection state of the Hearing Aid
+     * profile.
+     *
+     * <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}.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
+     * receive.
+     */
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CONNECTION_STATE_CHANGED =
+            "android.bluetooth.hearingaid.profile.action.CONNECTION_STATE_CHANGED";
+
+    /**
+     * Intent used to broadcast the change in the Playing state of the Hearing Aid
+     * profile.
+     *
+     * <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_PLAYING}, {@link #STATE_NOT_PLAYING},
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
+     * receive.
+     */
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_PLAYING_STATE_CHANGED =
+            "android.bluetooth.hearingaid.profile.action.PLAYING_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>
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
+     * receive.
+     */
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_ACTIVE_DEVICE_CHANGED =
+            "android.bluetooth.hearingaid.profile.action.ACTIVE_DEVICE_CHANGED";
+
+    /**
+     * Hearing Aid device is streaming music. This state can be one of
+     * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
+     * {@link #ACTION_PLAYING_STATE_CHANGED} intent.
+     */
+    public static final int STATE_PLAYING = 10;
+
+    /**
+     * Hearing Aid device is NOT streaming music. This state can be one of
+     * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
+     * {@link #ACTION_PLAYING_STATE_CHANGED} intent.
+     */
+    public static final int STATE_NOT_PLAYING = 11;
+
+    /** This device represents Left Hearing Aid. */
+    public static final int SIDE_LEFT = IBluetoothHearingAid.SIDE_LEFT;
+
+    /** This device represents Right Hearing Aid. */
+    public static final int SIDE_RIGHT = IBluetoothHearingAid.SIDE_RIGHT;
+
+    /** This device is Monaural. */
+    public static final int MODE_MONAURAL = IBluetoothHearingAid.MODE_MONAURAL;
+
+    /** This device is Binaural (should receive only left or right audio). */
+    public static final int MODE_BINAURAL = IBluetoothHearingAid.MODE_BINAURAL;
+
+    /** Can't read ClientID for this device */
+    public static final long HI_SYNC_ID_INVALID = IBluetoothHearingAid.HI_SYNC_ID_INVALID;
+
+    private Context mContext;
+    private ServiceListener mServiceListener;
+    private final ReentrantReadWriteLock mServiceLock = new ReentrantReadWriteLock();
+    @GuardedBy("mServiceLock")
+    private IBluetoothHearingAid mService;
+    private BluetoothAdapter mAdapter;
+
+    private final IBluetoothStateChangeCallback mBluetoothStateChangeCallback =
+            new IBluetoothStateChangeCallback.Stub() {
+                public void onBluetoothStateChange(boolean up) {
+                    if (DBG) Log.d(TAG, "onBluetoothStateChange: up=" + up);
+                    if (!up) {
+                        if (VDBG) Log.d(TAG, "Unbinding service...");
+                        try {
+                            mServiceLock.writeLock().lock();
+                            mService = null;
+                            mContext.unbindService(mConnection);
+                        } catch (Exception re) {
+                            Log.e(TAG, "", re);
+                        } finally {
+                            mServiceLock.writeLock().unlock();
+                        }
+                    } else {
+                        try {
+                            mServiceLock.readLock().lock();
+                            if (mService == null) {
+                                if (VDBG) Log.d(TAG, "Binding service...");
+                                doBind();
+                            }
+                        } catch (Exception re) {
+                            Log.e(TAG, "", re);
+                        } finally {
+                            mServiceLock.readLock().unlock();
+                        }
+                    }
+                }
+            };
+
+    /**
+     * Create a BluetoothHearingAid proxy object for interacting with the local
+     * Bluetooth Hearing Aid service.
+     */
+    /*package*/ BluetoothHearingAid(Context context, ServiceListener l) {
+        mContext = context;
+        mServiceListener = l;
+        mAdapter = BluetoothAdapter.getDefaultAdapter();
+        IBluetoothManager mgr = mAdapter.getBluetoothManager();
+        if (mgr != null) {
+            try {
+                mgr.registerStateChangeCallback(mBluetoothStateChangeCallback);
+            } catch (RemoteException e) {
+                Log.e(TAG, "", e);
+            }
+        }
+
+        doBind();
+    }
+
+    void doBind() {
+        Intent intent = new Intent(IBluetoothHearingAid.class.getName());
+        ComponentName comp = intent.resolveSystemService(mContext.getPackageManager(), 0);
+        intent.setComponent(comp);
+        if (comp == null || !mContext.bindServiceAsUser(intent, mConnection, 0,
+                android.os.Process.myUserHandle())) {
+            Log.e(TAG, "Could not bind to Bluetooth Hearing Aid Service with " + intent);
+            return;
+        }
+    }
+
+    /*package*/ void close() {
+        mServiceListener = null;
+        IBluetoothManager mgr = mAdapter.getBluetoothManager();
+        if (mgr != null) {
+            try {
+                mgr.unregisterStateChangeCallback(mBluetoothStateChangeCallback);
+            } catch (Exception e) {
+                Log.e(TAG, "", e);
+            }
+        }
+
+        try {
+            mServiceLock.writeLock().lock();
+            if (mService != null) {
+                mService = null;
+                mContext.unbindService(mConnection);
+            }
+        } catch (Exception re) {
+            Log.e(TAG, "", re);
+        } finally {
+            mServiceLock.writeLock().unlock();
+        }
+    }
+
+    @Override
+    public void finalize() {
+        // The empty finalize needs to be kept or the
+        // cts signature tests would fail.
+    }
+
+    /**
+     * 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.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
+     * permission.
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    public boolean connect(BluetoothDevice device) {
+        if (DBG) log("connect(" + device + ")");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled() && isValidDevice(device)) {
+                return mService.connect(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return false;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return false;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * 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.
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
+     * permission.
+     *
+     * @param device Remote Bluetooth Device
+     * @return false on immediate error, true otherwise
+     * @hide
+     */
+    public boolean disconnect(BluetoothDevice device) {
+        if (DBG) log("disconnect(" + device + ")");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled() && isValidDevice(device)) {
+                return mService.disconnect(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return false;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return false;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public List<BluetoothDevice> getConnectedDevices() {
+        if (VDBG) log("getConnectedDevices()");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()) {
+                return mService.getConnectedDevices();
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return new ArrayList<BluetoothDevice>();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return new ArrayList<BluetoothDevice>();
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
+        if (VDBG) log("getDevicesMatchingStates()");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()) {
+                return mService.getDevicesMatchingConnectionStates(states);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return new ArrayList<BluetoothDevice>();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return new ArrayList<BluetoothDevice>();
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public int getConnectionState(BluetoothDevice device) {
+        if (VDBG) log("getState(" + device + ")");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()
+                    && isValidDevice(device)) {
+                return mService.getConnectionState(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return BluetoothProfile.STATE_DISCONNECTED;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return BluetoothProfile.STATE_DISCONNECTED;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Set priority of the profile
+     *
+     * <p> The device should already be paired.
+     * Priority can be one of {@link #PRIORITY_ON} orgetBluetoothManager
+     * {@link #PRIORITY_OFF},
+     *
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
+     * permission.
+     *
+     * @param device Paired bluetooth device
+     * @param priority
+     * @return true if priority is set, false on error
+     * @hide
+     */
+    public boolean setPriority(BluetoothDevice device, int priority) {
+        if (DBG) log("setPriority(" + device + ", " + priority + ")");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()
+                    && isValidDevice(device)) {
+                if (priority != BluetoothProfile.PRIORITY_OFF
+                        && priority != BluetoothProfile.PRIORITY_ON) {
+                    return false;
+                }
+                return mService.setPriority(device, priority);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return false;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return false;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Get the priority of the profile.
+     *
+     * <p> The priority can be any of:
+     * {@link #PRIORITY_AUTO_CONNECT}, {@link #PRIORITY_OFF},
+     * {@link #PRIORITY_ON}, {@link #PRIORITY_UNDEFINED}
+     *
+     * @param device Bluetooth device
+     * @return priority of the device
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public int getPriority(BluetoothDevice device) {
+        if (VDBG) log("getPriority(" + device + ")");
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()
+                    && isValidDevice(device)) {
+                return mService.getPriority(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return BluetoothProfile.PRIORITY_OFF;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return BluetoothProfile.PRIORITY_OFF;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * 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";
+            case STATE_PLAYING:
+                return "playing";
+            case STATE_NOT_PLAYING:
+                return "not playing";
+            default:
+                return "<unknown state " + state + ">";
+        }
+    }
+
+    /**
+     * Get the volume of the device.
+     *
+     * <p> The volume is between -128 dB (mute) to 0 dB.
+     *
+     * @return volume of the hearing aid device.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public int getVolume() {
+        if (VDBG) {
+            log("getVolume()");
+        }
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()) {
+                return mService.getVolume();
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return 0;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return 0;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Tells remote device to adjust volume. Uses the following values:
+     * <ul>
+     * <li>{@link AudioManager#ADJUST_LOWER}</li>
+     * <li>{@link AudioManager#ADJUST_RAISE}</li>
+     * <li>{@link AudioManager#ADJUST_MUTE}</li>
+     * <li>{@link AudioManager#ADJUST_UNMUTE}</li>
+     * </ul>
+     *
+     * @param direction One of the supported adjust values.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public void adjustVolume(int direction) {
+        if (DBG) log("adjustVolume(" + direction + ")");
+
+        try {
+            mServiceLock.readLock().lock();
+
+            if (mService == null) {
+                Log.w(TAG, "Proxy not attached to service");
+                return;
+            }
+
+            if (!isEnabled()) return;
+
+            mService.adjustVolume(direction);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Tells remote device to set an absolute volume.
+     *
+     * @param volume Absolute volume to be set on remote
+     * @hide
+     */
+    public void setVolume(int volume) {
+        if (DBG) Log.d(TAG, "setVolume(" + volume + ")");
+
+        try {
+            mServiceLock.readLock().lock();
+            if (mService == null) {
+                Log.w(TAG, "Proxy not attached to service");
+                return;
+            }
+
+            if (!isEnabled()) return;
+
+            mService.setVolume(volume);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Get the CustomerId of the device.
+     *
+     * @param device Bluetooth device
+     * @return the CustomerId of the device
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public long getHiSyncId(BluetoothDevice device) {
+        if (VDBG) {
+            log("getCustomerId(" + device + ")");
+        }
+        try {
+            mServiceLock.readLock().lock();
+            if (mService == null) {
+                Log.w(TAG, "Proxy not attached to service");
+                return HI_SYNC_ID_INVALID;
+            }
+
+            if (!isEnabled() || !isValidDevice(device)) return HI_SYNC_ID_INVALID;
+
+            return mService.getHiSyncId(device);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return HI_SYNC_ID_INVALID;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Get the side of the device.
+     *
+     * @param device Bluetooth device.
+     * @return SIDE_LEFT or SIDE_RIGHT
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public int getDeviceSide(BluetoothDevice device) {
+        if (VDBG) {
+            log("getDeviceSide(" + device + ")");
+        }
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()
+                    && isValidDevice(device)) {
+                return mService.getDeviceSide(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return SIDE_LEFT;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return SIDE_LEFT;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Get the mode of the device.
+     *
+     * @param device Bluetooth device
+     * @return MODE_MONAURAL or MODE_BINAURAL
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.BLUETOOTH)
+    public int getDeviceMode(BluetoothDevice device) {
+        if (VDBG) {
+            log("getDeviceMode(" + device + ")");
+        }
+        try {
+            mServiceLock.readLock().lock();
+            if (mService != null && isEnabled()
+                    && isValidDevice(device)) {
+                return mService.getDeviceMode(device);
+            }
+            if (mService == null) Log.w(TAG, "Proxy not attached to service");
+            return MODE_MONAURAL;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return MODE_MONAURAL;
+        } finally {
+            mServiceLock.readLock().unlock();
+        }
+    }
+
+    private final ServiceConnection mConnection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            if (DBG) Log.d(TAG, "Proxy object connected");
+            try {
+                mServiceLock.writeLock().lock();
+                mService = IBluetoothHearingAid.Stub.asInterface(Binder.allowBlocking(service));
+            } finally {
+                mServiceLock.writeLock().unlock();
+            }
+
+            if (mServiceListener != null) {
+                mServiceListener.onServiceConnected(BluetoothProfile.HEARING_AID,
+                                                    BluetoothHearingAid.this);
+            }
+        }
+
+        public void onServiceDisconnected(ComponentName className) {
+            if (DBG) Log.d(TAG, "Proxy object disconnected");
+            try {
+                mServiceLock.writeLock().lock();
+                mService = null;
+            } finally {
+                mServiceLock.writeLock().unlock();
+            }
+            if (mServiceListener != null) {
+                mServiceListener.onServiceDisconnected(BluetoothProfile.HEARING_AID);
+            }
+        }
+    };
+
+    private boolean isEnabled() {
+        if (mAdapter.getState() == BluetoothAdapter.STATE_ON) return true;
+        return false;
+    }
+
+    private boolean isValidDevice(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);
+    }
+}
diff --git a/core/java/android/bluetooth/BluetoothProfile.java b/core/java/android/bluetooth/BluetoothProfile.java
index 0e2263f773b8..656188fbdfb8 100644
--- a/core/java/android/bluetooth/BluetoothProfile.java
+++ b/core/java/android/bluetooth/BluetoothProfile.java
@@ -165,12 +165,19 @@ public interface BluetoothProfile {
     public static final int OPP = 20;
 
     /**
+     * Hearing Aid Device
+     *
+     * @hide
+     */
+    int HEARING_AID = 21;
+
+    /**
      * Max profile ID. This value should be updated whenever a new profile is added to match
      * the largest value assigned to a profile.
      *
      * @hide
      */
-    public static final int MAX_PROFILE_ID = 20;
+    int MAX_PROFILE_ID = 21;
 
     /**
      * Default priority for devices that we try to auto-connect to and
diff --git a/core/java/android/bluetooth/BluetoothUuid.java b/core/java/android/bluetooth/BluetoothUuid.java
index 76cb3f5b548e..0a0d21498032 100644
--- a/core/java/android/bluetooth/BluetoothUuid.java
+++ b/core/java/android/bluetooth/BluetoothUuid.java
@@ -79,6 +79,9 @@ public final class BluetoothUuid {
             ParcelUuid.fromString("00001132-0000-1000-8000-00805F9B34FB");
     public static final ParcelUuid SAP =
             ParcelUuid.fromString("0000112D-0000-1000-8000-00805F9B34FB");
+    /* TODO: b/69623109 update this value. It will change to 16bit UUID!! */
+    public static final ParcelUuid HearingAid =
+            ParcelUuid.fromString("7312C48F-22CC-497F-85FD-A0616A3B9E05");
 
     public static final ParcelUuid BASE_UUID =
             ParcelUuid.fromString("00000000-0000-1000-8000-00805F9B34FB");
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 477c12aa9ee8..ae49070a3676 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -173,6 +173,10 @@
     <protected-broadcast
         android:name="android.bluetooth.headsetclient.profile.action.LAST_VTAG" />
     <protected-broadcast
+        android:name="android.bluetooth.hearingaid.profile.action.CONNECTION_STATE_CHANGED" />
+    <protected-broadcast
+        android:name="android.bluetooth.hearingaid.profile.action.PLAYING_STATE_CHANGED" />
+    <protected-broadcast
         android:name="android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED" />
     <protected-broadcast
         android:name="android.bluetooth.a2dp.profile.action.ACTIVE_DEVICE_CHANGED" />
diff --git a/packages/SettingsLib/res/drawable/ic_bt_hearing_aid.xml b/packages/SettingsLib/res/drawable/ic_bt_hearing_aid.xml
new file mode 100644
index 000000000000..e14c99b61e2f
--- /dev/null
+++ b/packages/SettingsLib/res/drawable/ic_bt_hearing_aid.xml
@@ -0,0 +1,24 @@
+<!--
+     Copyright (C) 2018 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M17,20c-0.29,0 -0.56,-0.06 -0.76,-0.15 -0.71,-0.37 -1.21,-0.88 -1.71,-2.38 -0.51,-1.56 -1.47,-2.29 -2.39,-3 -0.79,-0.61 -1.61,-1.24 -2.32,-2.53C9.29,10.98 9,9.93 9,9c0,-2.8 2.2,-5 5,-5s5,2.2 5,5h2c0,-3.93 -3.07,-7 -7,-7S7,5.07 7,9c0,1.26 0.38,2.65 1.07,3.9 0.91,1.65 1.98,2.48 2.85,3.15 0.81,0.62 1.39,1.07 1.71,2.05 0.6,1.82 1.37,2.84 2.73,3.55 0.51,0.23 1.07,0.35 1.64,0.35 2.21,0 4,-1.79 4,-4h-2c0,1.1 -0.9,2 -2,2zM7.64,2.64L6.22,1.22C4.23,3.21 3,5.96 3,9s1.23,5.79 3.22,7.78l1.41,-1.41C6.01,13.74 5,11.49 5,9s1.01,-4.74 2.64,-6.36zM11.5,9c0,1.38 1.12,2.5 2.5,2.5s2.5,-1.12 2.5,-2.5 -1.12,-2.5 -2.5,-2.5 -2.5,1.12 -2.5,2.5z"/>
+</vector>
diff --git a/packages/SettingsLib/res/values/strings.xml b/packages/SettingsLib/res/values/strings.xml
index 74a6c649b0b0..428f0b85b633 100644
--- a/packages/SettingsLib/res/values/strings.xml
+++ b/packages/SettingsLib/res/values/strings.xml
@@ -177,6 +177,11 @@
     <!-- Bluetooth settings. Similar to bluetooth_profile_a2dp_high_quality, but used when the device supports high quality audio but we don't know which codec that will be used. -->
     <string name="bluetooth_profile_a2dp_high_quality_unknown_codec">HD audio</string>
 
+    <!-- Bluetooth settings.  The user-visible string that is used whenever referring to the Hearing Aid profile. -->
+    <string name="bluetooth_profile_hearing_aid">Hearing Aid</string>
+    <!-- Bluetooth settings.  Connection options screen.  The summary for the Hearing Aid checkbox preference when Hearing Aid is connected. -->
+    <string name="bluetooth_hearing_aid_profile_summary_connected">Connected to Hearing Aid</string>
+
     <!-- Bluetooth settings.  Connection options screen.  The summary for the A2DP checkbox preference when A2DP is connected. -->
     <string name="bluetooth_a2dp_profile_summary_connected">Connected to media audio</string>
     <!-- Bluetooth settings.  Connection options screen.  The summary for the headset checkbox preference when headset is connected. -->
@@ -214,6 +219,8 @@
          for the HID checkbox preference that describes how checking it
          will set the HID profile as preferred. -->
     <string name="bluetooth_hid_profile_summary_use_for">Use for input</string>
+    <!-- Bluetooth settings.  Connection options screen.  The summary for the Hearing Aid checkbox preference that describes how checking it will set the Hearing Aid profile as preferred. -->
+    <string name="bluetooth_hearing_aid_profile_summary_use_for">Use for Hearing Aid</string>
 
     <!-- Button text for accepting an incoming pairing request. [CHAR LIMIT=20] -->
     <string name="bluetooth_pairing_accept">Pair</string>
diff --git a/packages/SettingsLib/src/com/android/settingslib/bluetooth/HearingAidProfile.java b/packages/SettingsLib/src/com/android/settingslib/bluetooth/HearingAidProfile.java
new file mode 100644
index 000000000000..8f9e4635bb4b
--- /dev/null
+++ b/packages/SettingsLib/src/com/android/settingslib/bluetooth/HearingAidProfile.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2018 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.settingslib.bluetooth;
+
+import android.bluetooth.BluetoothHearingAid;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothClass;
+import android.bluetooth.BluetoothCodecConfig;
+import android.bluetooth.BluetoothCodecStatus;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.BluetoothUuid;
+import android.content.Context;
+import android.os.ParcelUuid;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.settingslib.R;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class HearingAidProfile implements LocalBluetoothProfile {
+    private static final String TAG = "HearingAidProfile";
+    private static boolean V = true;
+
+    private Context mContext;
+
+    private BluetoothHearingAid mService;
+    private boolean mIsProfileReady;
+
+    private final LocalBluetoothAdapter mLocalAdapter;
+    private final CachedBluetoothDeviceManager mDeviceManager;
+
+    static final String NAME = "HearingAid";
+    private final LocalBluetoothProfileManager mProfileManager;
+
+    // Order of this profile in device profiles list
+    private static final int ORDINAL = 1;
+
+    // These callbacks run on the main thread.
+    private final class HearingAidServiceListener
+            implements BluetoothProfile.ServiceListener {
+
+        public void onServiceConnected(int profile, BluetoothProfile proxy) {
+            if (V) Log.d(TAG,"Bluetooth service connected");
+            mService = (BluetoothHearingAid) proxy;
+            // We just bound to the service, so refresh the UI for any connected HearingAid devices.
+            List<BluetoothDevice> deviceList = mService.getConnectedDevices();
+            while (!deviceList.isEmpty()) {
+                BluetoothDevice nextDevice = deviceList.remove(0);
+                CachedBluetoothDevice device = mDeviceManager.findDevice(nextDevice);
+                // we may add a new device here, but generally this should not happen
+                if (device == null) {
+                    Log.w(TAG, "HearingAidProfile found new device: " + nextDevice);
+                    device = mDeviceManager.addDevice(mLocalAdapter, mProfileManager, nextDevice);
+                }
+                device.onProfileStateChanged(HearingAidProfile.this, BluetoothProfile.STATE_CONNECTED);
+                device.refresh();
+            }
+            mIsProfileReady=true;
+        }
+
+        public void onServiceDisconnected(int profile) {
+            if (V) Log.d(TAG,"Bluetooth service disconnected");
+            mIsProfileReady=false;
+        }
+    }
+
+    public boolean isProfileReady() {
+        return mIsProfileReady;
+    }
+
+    HearingAidProfile(Context context, LocalBluetoothAdapter adapter,
+            CachedBluetoothDeviceManager deviceManager,
+            LocalBluetoothProfileManager profileManager) {
+        mContext = context;
+        mLocalAdapter = adapter;
+        mDeviceManager = deviceManager;
+        mProfileManager = profileManager;
+        mLocalAdapter.getProfileProxy(context, new HearingAidServiceListener(),
+                BluetoothProfile.HEARING_AID);
+    }
+
+    public boolean isConnectable() {
+        return true;
+    }
+
+    public boolean isAutoConnectable() {
+        return true;
+    }
+
+    public List<BluetoothDevice> getConnectedDevices() {
+        if (mService == null) return new ArrayList<BluetoothDevice>(0);
+        return mService.getDevicesMatchingConnectionStates(
+              new int[] {BluetoothProfile.STATE_CONNECTED,
+                         BluetoothProfile.STATE_CONNECTING,
+                         BluetoothProfile.STATE_DISCONNECTING});
+    }
+
+    public boolean connect(BluetoothDevice device) {
+        if (mService == null) return false;
+        return mService.connect(device);
+    }
+
+    public boolean disconnect(BluetoothDevice device) {
+        if (mService == null) return false;
+        // Downgrade priority as user is disconnecting the hearing aid.
+        if (mService.getPriority(device) > BluetoothProfile.PRIORITY_ON){
+            mService.setPriority(device, BluetoothProfile.PRIORITY_ON);
+        }
+        return mService.disconnect(device);
+    }
+
+    public int getConnectionStatus(BluetoothDevice device) {
+        if (mService == null) {
+            return BluetoothProfile.STATE_DISCONNECTED;
+        }
+        return mService.getConnectionState(device);
+    }
+
+    public boolean isPreferred(BluetoothDevice device) {
+        if (mService == null) return false;
+        return mService.getPriority(device) > BluetoothProfile.PRIORITY_OFF;
+    }
+
+    public int getPreferred(BluetoothDevice device) {
+        if (mService == null) return BluetoothProfile.PRIORITY_OFF;
+        return mService.getPriority(device);
+    }
+
+    public void setPreferred(BluetoothDevice device, boolean preferred) {
+        if (mService == null) return;
+        if (preferred) {
+            if (mService.getPriority(device) < BluetoothProfile.PRIORITY_ON) {
+                mService.setPriority(device, BluetoothProfile.PRIORITY_ON);
+            }
+        } else {
+            mService.setPriority(device, BluetoothProfile.PRIORITY_OFF);
+        }
+    }
+
+    public int getVolume() {
+        if (mService == null) {
+            return 0;
+        }
+        return mService.getVolume();
+    }
+
+    public void setVolume(int volume) {
+        if (mService == null) {
+            return;
+        }
+        mService.setVolume(volume);
+    }
+
+    public long getHiSyncId(BluetoothDevice device) {
+        if (mService == null) {
+            return BluetoothHearingAid.HI_SYNC_ID_INVALID;
+        }
+        return mService.getHiSyncId(device);
+    }
+
+    public int getDeviceSide(BluetoothDevice device) {
+        if (mService == null) {
+            return BluetoothHearingAid.SIDE_LEFT;
+        }
+        return mService.getDeviceSide(device);
+    }
+
+    public int getDeviceMode(BluetoothDevice device) {
+        if (mService == null) {
+            return BluetoothHearingAid.MODE_MONAURAL;
+        }
+        return mService.getDeviceMode(device);
+    }
+
+    public String toString() {
+        return NAME;
+    }
+
+    public int getOrdinal() {
+        return ORDINAL;
+    }
+
+    public int getNameResource(BluetoothDevice device) {
+        return R.string.bluetooth_profile_hearing_aid;
+    }
+
+    public int getSummaryResourceForDevice(BluetoothDevice device) {
+        int state = getConnectionStatus(device);
+        switch (state) {
+            case BluetoothProfile.STATE_DISCONNECTED:
+                return R.string.bluetooth_hearing_aid_profile_summary_use_for;
+
+            case BluetoothProfile.STATE_CONNECTED:
+                return R.string.bluetooth_hearing_aid_profile_summary_connected;
+
+            default:
+                return Utils.getConnectionStateSummary(state);
+        }
+    }
+
+    public int getDrawableResource(BluetoothClass btClass) {
+        return R.drawable.ic_bt_hearing_aid;
+    }
+
+    protected void finalize() {
+        if (V) Log.d(TAG, "finalize()");
+        if (mService != null) {
+            try {
+                BluetoothAdapter.getDefaultAdapter().closeProfileProxy(BluetoothProfile.HEARING_AID,
+                                                                       mService);
+                mService = null;
+            }catch (Throwable t) {
+                Log.w(TAG, "Error cleaning up Hearing Aid proxy", t);
+            }
+        }
+    }
+}
diff --git a/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothProfileManager.java b/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothProfileManager.java
index 991d9221c796..34a099cb7ea0 100644
--- a/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothProfileManager.java
+++ b/packages/SettingsLib/src/com/android/settingslib/bluetooth/LocalBluetoothProfileManager.java
@@ -21,6 +21,7 @@ import android.bluetooth.BluetoothA2dpSink;
 import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothHeadset;
 import android.bluetooth.BluetoothHeadsetClient;
+import android.bluetooth.BluetoothHearingAid;
 import android.bluetooth.BluetoothHidHost;
 import android.bluetooth.BluetoothMap;
 import android.bluetooth.BluetoothMapClient;
@@ -91,6 +92,7 @@ public class LocalBluetoothProfileManager {
     private final PbapServerProfile mPbapProfile;
     private final boolean mUsePbapPce;
     private final boolean mUseMapClient;
+    private HearingAidProfile mHearingAidProfile;
 
     /**
      * Mapping from profile name, e.g. "HEADSET" to profile object.
@@ -143,10 +145,14 @@ public class LocalBluetoothProfileManager {
 
         //Create PBAP server profile
         if(DEBUG) Log.d(TAG, "Adding local PBAP profile");
+
         mPbapProfile = new PbapServerProfile(context);
         addProfile(mPbapProfile, PbapServerProfile.NAME,
              BluetoothPbap.ACTION_CONNECTION_STATE_CHANGED);
 
+        mHearingAidProfile = new HearingAidProfile(mContext, mLocalAdapter, mDeviceManager, this);
+        addProfile(mHearingAidProfile, HearingAidProfile.NAME,
+                   BluetoothHearingAid.ACTION_CONNECTION_STATE_CHANGED);
         if (DEBUG) Log.d(TAG, "LocalBluetoothProfileManager construction complete");
     }
 
@@ -254,6 +260,18 @@ public class LocalBluetoothProfileManager {
                 "Warning: PBAP Client profile was previously added but the UUID is now missing.");
         }
 
+        //Hearing Aid Client
+        if (BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.HearingAid)) {
+            if (mHearingAidProfile == null) {
+                if(DEBUG) Log.d(TAG, "Adding local Hearing Aid profile");
+                mHearingAidProfile = new HearingAidProfile(mContext, mLocalAdapter, mDeviceManager, this);
+                addProfile(mHearingAidProfile, HearingAidProfile.NAME,
+                        BluetoothHearingAid.ACTION_CONNECTION_STATE_CHANGED);
+            }
+        } else if (mHearingAidProfile != null) {
+            Log.w(TAG, "Warning: Hearing Aid profile was previously added but the UUID is now missing.");
+        }
+
         mEventManager.registerProfileIntentReceiver();
 
         // There is no local SDP record for HID and Settings app doesn't control PBAP Server.
@@ -416,6 +434,10 @@ public class LocalBluetoothProfileManager {
         return mMapClientProfile;
     }
 
+    public HearingAidProfile getHearingAidProfile() {
+        return mHearingAidProfile;
+    }
+
     /**
      * Fill in a list of LocalBluetoothProfile objects that are supported by
      * the local device and the remote device.
@@ -515,6 +537,12 @@ public class LocalBluetoothProfileManager {
             removedProfiles.remove(mPbapClientProfile);
         }
 
+        if (BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.HearingAid) &&
+            mHearingAidProfile != null) {
+            profiles.add(mHearingAidProfile);
+            removedProfiles.remove(mHearingAidProfile);
+        }
+
         if (DEBUG) {
             Log.d(TAG,"New Profiles" + profiles.toString());
         }