csip: Add Coordinated Set Identification Profile

Tag: #feature
Test: atest CsipSetCoordinatorStateMachineTest CsipSetCoordinatorServiceTest
Bug: 150670922
Sponsor: jpawlowski@
Change-Id: I67536ddcc32ace82d63e19426dce19f2bc69cdea

core/api/current.txt

@@ -9020,6 +9020,15 @@ package android.bluetooth {
     field public static final int TELEPHONY = 4194304; // 0x400000
   }
 
+  public final class BluetoothCsipSetCoordinator implements java.lang.AutoCloseable android.bluetooth.BluetoothProfile {
+    method public void close();
+    method protected void finalize();
+    method @NonNull public java.util.List<android.bluetooth.BluetoothDevice> getConnectedDevices();
+    method public int getConnectionState(@Nullable android.bluetooth.BluetoothDevice);
+    method @NonNull public java.util.List<android.bluetooth.BluetoothDevice> getDevicesMatchingConnectionStates(@NonNull int[]);
+    field @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public static final String ACTION_CSIS_CONNECTION_STATE_CHANGED = "android.bluetooth.action.CSIS_CONNECTION_STATE_CHANGED";
+  }
+
   public final class BluetoothDevice implements android.os.Parcelable {
     method @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public android.bluetooth.BluetoothGatt connectGatt(android.content.Context, boolean, android.bluetooth.BluetoothGattCallback);
     method @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public android.bluetooth.BluetoothGatt connectGatt(android.content.Context, boolean, android.bluetooth.BluetoothGattCallback, int);

core/api/system-current.txt

@@ -1963,6 +1963,21 @@ package android.bluetooth {
     method public void onOobData(int, @NonNull android.bluetooth.OobData);
   }
 
+  public final class BluetoothCsipSetCoordinator implements java.lang.AutoCloseable android.bluetooth.BluetoothProfile {
+    method @NonNull @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public java.util.List<java.lang.Integer> getAllGroupIds(@Nullable android.os.ParcelUuid);
+    method @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public int getConnectionPolicy(@Nullable android.bluetooth.BluetoothDevice);
+    method @NonNull @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public java.util.Map getGroupUuidMapByDevice(@Nullable android.bluetooth.BluetoothDevice);
+    method @Nullable @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public java.util.UUID groupLock(int, @Nullable java.util.concurrent.Executor, @Nullable android.bluetooth.BluetoothCsipSetCoordinator.ClientLockCallback);
+    method @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public boolean groupUnlock(@NonNull java.util.UUID);
+    method @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public boolean setConnectionPolicy(@Nullable android.bluetooth.BluetoothDevice, int);
+    field @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public static final String ACTION_CSIS_DEVICE_AVAILABLE = "android.bluetooth.action.CSIS_DEVICE_AVAILABLE";
+    field @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED) public static final String ACTION_CSIS_SET_MEMBER_AVAILABLE = "android.bluetooth.action.CSIS_SET_MEMBER_AVAILABLE";
+  }
+
+  public static interface BluetoothCsipSetCoordinator.ClientLockCallback {
+    method public void onGroupLockSet(int, int, boolean);
+  }
+
   public final class BluetoothDevice implements android.os.Parcelable {
     method @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED}) public boolean canBondWithoutDialog();
     method @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean cancelBondProcess();

core/java/android/bluetooth/BluetoothAdapter.java

@@ -3062,6 +3062,10 @@ public final class BluetoothAdapter {
         } else if (profile == BluetoothProfile.VOLUME_CONTROL) {
             BluetoothVolumeControl vcs = new BluetoothVolumeControl(context, listener, this);
             return true;
+        } else if (profile == BluetoothProfile.CSIP_SET_COORDINATOR) {
+            BluetoothCsipSetCoordinator csipSetCoordinator =
+                    new BluetoothCsipSetCoordinator(context, listener, this);
+            return true;
         } else {
             return false;
         }
@@ -3159,6 +3163,11 @@ public final class BluetoothAdapter {
                 BluetoothVolumeControl vcs = (BluetoothVolumeControl) proxy;
                 vcs.close();
                 break;
+            case BluetoothProfile.CSIP_SET_COORDINATOR:
+                BluetoothCsipSetCoordinator csipSetCoordinator =
+                        (BluetoothCsipSetCoordinator) proxy;
+                csipSetCoordinator.close();
+                break;
         }
     }
 

core/java/android/bluetooth/BluetoothCsipSetCoordinator.java

@@ -0,0 +1,553 @@
+/*
+ * Copyright 2021 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 android.Manifest;
+import android.annotation.CallbackExecutor;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.SystemApi;
+import android.content.AttributionSource;
+import android.content.Context;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.ParcelUuid;
+import android.os.RemoteException;
+import android.util.CloseGuard;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.Executor;
+
+/**
+ * This class provides the public APIs to control the Bluetooth CSIP set coordinator.
+ *
+ * <p>BluetoothCsipSetCoordinator is a proxy object for controlling the Bluetooth VC
+ * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
+ * the BluetoothCsipSetCoordinator proxy object.
+ *
+ */
+public final class BluetoothCsipSetCoordinator implements BluetoothProfile, AutoCloseable {
+    private static final String TAG = "BluetoothCsipSetCoordinator";
+    private static final boolean DBG = false;
+    private static final boolean VDBG = false;
+
+    private CloseGuard mCloseGuard;
+
+    /**
+     * @hide
+     */
+    @SystemApi
+    public interface ClientLockCallback {
+        /**
+         * @hide
+         */
+        @SystemApi void onGroupLockSet(int groupId, int opStatus, boolean isLocked);
+    }
+
+    private static class BluetoothCsipSetCoordinatorLockCallbackDelegate
+            extends IBluetoothCsipSetCoordinatorLockCallback.Stub {
+        private final ClientLockCallback mCallback;
+        private final Executor mExecutor;
+
+        BluetoothCsipSetCoordinatorLockCallbackDelegate(
+                Executor executor, ClientLockCallback callback) {
+            mExecutor = executor;
+            mCallback = callback;
+        }
+
+        @Override
+        public void onGroupLockSet(int groupId, int opStatus, boolean isLocked) {
+            mExecutor.execute(() -> mCallback.onGroupLockSet(groupId, opStatus, isLocked));
+        }
+    };
+
+    /**
+     * Intent used to broadcast the change in connection state of the CSIS
+     * Client.
+     *
+     * <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}.
+     */
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CSIS_CONNECTION_STATE_CHANGED =
+            "android.bluetooth.action.CSIS_CONNECTION_STATE_CHANGED";
+
+    /**
+     * Intent used to expose broadcast receiving device.
+     *
+     * <p>This intent will have 2 extras:
+     * <ul>
+     * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote Broadcast receiver device. </li>
+     * <li> {@link #EXTRA_CSIS_GROUP_ID} - Group identifier. </li>
+     * <li> {@link #EXTRA_CSIS_GROUP_SIZE} - Group size. </li>
+     * <li> {@link #EXTRA_CSIS_GROUP_TYPE_UUID} - Group type UUID. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CSIS_DEVICE_AVAILABLE =
+            "android.bluetooth.action.CSIS_DEVICE_AVAILABLE";
+
+    /**
+     * Used as an extra field in {@link #ACTION_CSIS_DEVICE_AVAILABLE} intent.
+     * Contains the group id.
+     *
+     * @hide
+     */
+    public static final String EXTRA_CSIS_GROUP_ID = "android.bluetooth.extra.CSIS_GROUP_ID";
+
+    /**
+     * Group size as int extra field in {@link #ACTION_CSIS_DEVICE_AVAILABLE} intent.
+     *
+     * @hide
+     */
+    public static final String EXTRA_CSIS_GROUP_SIZE = "android.bluetooth.extra.CSIS_GROUP_SIZE";
+
+    /**
+     * Group type uuid extra field in {@link #ACTION_CSIS_DEVICE_AVAILABLE} intent.
+     *
+     * @hide
+     */
+    public static final String EXTRA_CSIS_GROUP_TYPE_UUID =
+            "android.bluetooth.extra.CSIS_GROUP_TYPE_UUID";
+
+    /**
+     * Intent used to broadcast information about identified set member
+     * ready to connect.
+     *
+     * <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>
+     * <li>  {@link #EXTRA_CSIS_GROUP_ID} - Group identifier. </li>
+     * </ul>
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CSIS_SET_MEMBER_AVAILABLE =
+            "android.bluetooth.action.CSIS_SET_MEMBER_AVAILABLE";
+
+    /**
+     * This represents an invalid group ID.
+     *
+     * @hide
+     */
+    public static final int GROUP_ID_INVALID = IBluetoothCsipSetCoordinator.CSIS_GROUP_ID_INVALID;
+
+    /**
+     * Indicating that group was locked with success.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_SUCCESS = 0;
+
+    /**
+     * Indicating that group locked failed due to invalid group ID.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_FAILED_INVALID_GROUP = 1;
+
+    /**
+     * Indicating that group locked failed due to empty group.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_FAILED_GROUP_EMPTY = 2;
+
+    /**
+     * Indicating that group locked failed due to group members being disconnected.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_FAILED_GROUP_NOT_CONNECTED = 3;
+
+    /**
+     * Indicating that group locked failed due to group member being already locked.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_FAILED_LOCKED_BY_OTHER = 4;
+
+    /**
+     * Indicating that group locked failed due to other reason.
+     *
+     * @hide
+     */
+    public static final int GROUP_LOCK_FAILED_OTHER_REASON = 5;
+
+    /**
+     * Indicating that group member in locked state was lost.
+     *
+     * @hide
+     */
+    public static final int LOCKED_GROUP_MEMBER_LOST = 6;
+
+    private final BluetoothAdapter mAdapter;
+    private final AttributionSource mAttributionSource;
+    private final BluetoothProfileConnector<IBluetoothCsipSetCoordinator> mProfileConnector =
+            new BluetoothProfileConnector(this, BluetoothProfile.CSIP_SET_COORDINATOR, TAG,
+                    IBluetoothCsipSetCoordinator.class.getName()) {
+                @Override
+                public IBluetoothCsipSetCoordinator getServiceInterface(IBinder service) {
+                    return IBluetoothCsipSetCoordinator.Stub.asInterface(
+                            Binder.allowBlocking(service));
+                }
+            };
+
+    /**
+     * Create a BluetoothCsipSetCoordinator proxy object for interacting with the local
+     * Bluetooth CSIS service.
+     */
+    /*package*/ BluetoothCsipSetCoordinator(Context context, ServiceListener listener, BluetoothAdapter adapter) {
+        mAdapter = adapter;
+        mAttributionSource = adapter.getAttributionSource();
+        mProfileConnector.connect(context, listener);
+        mCloseGuard = new CloseGuard();
+        mCloseGuard.open("close");
+    }
+
+    /**
+     * @hide
+     */
+    protected void finalize() {
+        if (mCloseGuard != null) {
+            mCloseGuard.warnIfOpen();
+        }
+        close();
+    }
+
+    /**
+     * @hide
+     */
+    public void close() {
+        mProfileConnector.disconnect();
+    }
+
+    private IBluetoothCsipSetCoordinator getService() {
+        return mProfileConnector.getService();
+    }
+
+    /**
+     * Lock the set.
+     * @param groupId group ID to lock,
+     * @param executor callback executor,
+     * @param cb callback to report lock and unlock events - stays valid until the app unlocks
+     *           using the returned lock identifier or the lock timeouts on the remote side,
+     *           as per CSIS specification,
+     * @return unique lock identifier used for unlocking or null if lock has failed.
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public
+    @Nullable UUID groupLock(int groupId, @Nullable @CallbackExecutor Executor executor,
+            @Nullable ClientLockCallback cb) {
+        if (VDBG) {
+            log("groupLockSet()");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled()) {
+                IBluetoothCsipSetCoordinatorLockCallback delegate = null;
+                if ((executor != null) && (cb != null)) {
+                    delegate = new BluetoothCsipSetCoordinatorLockCallbackDelegate(executor, cb);
+                }
+                return service.groupLock(groupId, delegate, mAttributionSource).getUuid();
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return null;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return null;
+        }
+    }
+
+    /**
+     * Unlock the set.
+     * @param lockUuid unique lock identifier
+     * @return true if unlocked, false on error
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public boolean groupUnlock(@NonNull UUID lockUuid) {
+        if (VDBG) {
+            log("groupLockSet()");
+        }
+        if (lockUuid == null) {
+            return false;
+        }
+
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled()) {
+                service.groupUnlock(new ParcelUuid(lockUuid), mAttributionSource);
+                return true;
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return false;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return false;
+        }
+    }
+
+    /**
+     * Get device's groups.
+     * @param device the active device
+     * @return Map of groups ids and related UUIDs
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public @NonNull Map getGroupUuidMapByDevice(@Nullable BluetoothDevice device) {
+        if (VDBG) {
+            log("getGroupUuidMapByDevice()");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled()) {
+                return service.getGroupUuidMapByDevice(device, mAttributionSource);
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return new HashMap<>();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return new HashMap<>();
+        }
+    }
+
+    /**
+     * Get group id for the given UUID
+     * @param uuid
+     * @return list of group IDs
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public @NonNull List<Integer> getAllGroupIds(@Nullable ParcelUuid uuid) {
+        if (VDBG) {
+            log("getAllGroupIds()");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled()) {
+                return service.getAllGroupIds(uuid, mAttributionSource);
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return new ArrayList<Integer>();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return new ArrayList<Integer>();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NonNull List<BluetoothDevice> getConnectedDevices() {
+        if (VDBG) {
+            log("getConnectedDevices()");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        if (service != null && isEnabled()) {
+            try {
+                return service.getConnectedDevices(mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+                return new ArrayList<BluetoothDevice>();
+            }
+        }
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+        }
+        return new ArrayList<BluetoothDevice>();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public
+    @NonNull List<BluetoothDevice> getDevicesMatchingConnectionStates(
+            @NonNull int[] states) {
+        if (VDBG) {
+            log("getDevicesMatchingStates(states=" + Arrays.toString(states) + ")");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        if (service != null && isEnabled()) {
+            try {
+                return service.getDevicesMatchingConnectionStates(states, mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+                return new ArrayList<BluetoothDevice>();
+            }
+        }
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+        }
+        return new ArrayList<BluetoothDevice>();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public
+    @BluetoothProfile.BtProfileState int getConnectionState(
+            @Nullable BluetoothDevice device) {
+        if (VDBG) {
+            log("getState(" + device + ")");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        if (service != null && isEnabled() && isValidDevice(device)) {
+            try {
+                return service.getConnectionState(device, mAttributionSource);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+                return BluetoothProfile.STATE_DISCONNECTED;
+            }
+        }
+        if (service == null) {
+            Log.w(TAG, "Proxy not attached to service");
+        }
+        return BluetoothProfile.STATE_DISCONNECTED;
+    }
+
+    /**
+     * 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
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public boolean setConnectionPolicy(
+            @Nullable BluetoothDevice device, @ConnectionPolicy int connectionPolicy) {
+        if (DBG) {
+            log("setConnectionPolicy(" + device + ", " + connectionPolicy + ")");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled() && isValidDevice(device)) {
+                if (connectionPolicy != BluetoothProfile.CONNECTION_POLICY_FORBIDDEN
+                        && connectionPolicy != BluetoothProfile.CONNECTION_POLICY_ALLOWED) {
+                    return false;
+                }
+                return service.setConnectionPolicy(device, connectionPolicy, mAttributionSource);
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return false;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return false;
+        }
+    }
+
+    /**
+     * 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
+     */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
+    public @ConnectionPolicy int getConnectionPolicy(@Nullable BluetoothDevice device) {
+        if (VDBG) {
+            log("getConnectionPolicy(" + device + ")");
+        }
+        final IBluetoothCsipSetCoordinator service = getService();
+        try {
+            if (service != null && isEnabled() && isValidDevice(device)) {
+                return service.getConnectionPolicy(device, mAttributionSource);
+            }
+            if (service == null) {
+                Log.w(TAG, "Proxy not attached to service");
+            }
+            return BluetoothProfile.CONNECTION_POLICY_FORBIDDEN;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
+            return BluetoothProfile.CONNECTION_POLICY_FORBIDDEN;
+        }
+    }
+
+    private boolean isEnabled() {
+        return mAdapter.getState() == BluetoothAdapter.STATE_ON;
+    }
+
+    private static boolean isValidDevice(@Nullable BluetoothDevice device) {
+        return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress());
+    }
+
+    private static void log(String msg) {
+        Log.d(TAG, msg);
+    }
+}

core/res/AndroidManifest.xml

@@ -201,6 +201,9 @@
         android:name="android.bluetooth.hearingaid.profile.action.PLAYING_STATE_CHANGED" />
     <protected-broadcast
         android:name="android.bluetooth.hearingaid.profile.action.ACTIVE_DEVICE_CHANGED" />
+    <protected-broadcast android:name="android.bluetooth.action.CSIS_CONNECTION_STATE_CHANGED" />
+    <protected-broadcast android:name="android.bluetooth.action.CSIS_DEVICE_AVAILABLE" />
+    <protected-broadcast android:name="android.bluetooth.action.CSIS_SET_MEMBER_AVAILABLE" />
     <protected-broadcast
         android:name="android.bluetooth.volume-control.profile.action.CONNECTION_STATE_CHANGED" />
     <protected-broadcast