Merge TP1A.220120.003

Change-Id: I202f5093bbd13b381ea11f969fee6154ba91fa11

1 files changed, 3137 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothDevice.java b/framework/java/android/bluetooth/BluetoothDevice.java
new file mode 100644
index 0000000000..1827682d6f
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothDevice.java
@@ -0,0 +1,3137 @@
+/*
+ * Copyright (C) 2017, The Linux Foundation. All rights reserved.
+ * Not a Contribution.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted (subject to the limitations in the
+ * disclaimer below) provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *
+ * * Neither the name of The Linux Foundation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
+ * GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
+ * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (C) 2009 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.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.SuppressLint;
+import android.annotation.SystemApi; //import android.app.PropertyInvalidatedCache;
+import android.bluetooth.annotations.RequiresBluetoothConnectPermission;
+import android.bluetooth.annotations.RequiresBluetoothLocationPermission;
+import android.bluetooth.annotations.RequiresBluetoothScanPermission;
+import android.bluetooth.annotations.RequiresLegacyBluetoothAdminPermission;
+import android.bluetooth.annotations.RequiresLegacyBluetoothPermission;
+import android.companion.AssociationRequest;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.content.AttributionSource;
+import android.content.Context;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Parcel;
+import android.os.ParcelUuid;
+import android.os.Parcelable;
+import android.os.Process;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.UUID;
+
+/**
+ * Represents a remote Bluetooth device. A {@link BluetoothDevice} lets you
+ * create a connection with the respective device or query information about
+ * it, such as the name, address, class, and bonding state.
+ *
+ * <p>This class is really just a thin wrapper for a Bluetooth hardware
+ * address. Objects of this class are immutable. Operations on this class
+ * are performed on the remote Bluetooth hardware address, using the
+ * {@link BluetoothAdapter} that was used to create this {@link
+ * BluetoothDevice}.
+ *
+ * <p>To get a {@link BluetoothDevice}, use
+ * {@link BluetoothAdapter#getRemoteDevice(String)
+ * BluetoothAdapter.getRemoteDevice(String)} to create one representing a device
+ * of a known MAC address (which you can get through device discovery with
+ * {@link BluetoothAdapter}) or get one from the set of bonded devices
+ * returned by {@link BluetoothAdapter#getBondedDevices()
+ * BluetoothAdapter.getBondedDevices()}. You can then open a
+ * {@link BluetoothSocket} for communication with the remote device, using
+ * {@link #createRfcommSocketToServiceRecord(UUID)} over Bluetooth BR/EDR or using
+ * {@link #createL2capChannel(int)} over Bluetooth LE.
+ *
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>
+ * For more information about using Bluetooth, read the <a href=
+ * "{@docRoot}guide/topics/connectivity/bluetooth.html">Bluetooth</a> developer
+ * guide.
+ * </p>
+ * </div>
+ *
+ * {@see BluetoothAdapter}
+ * {@see BluetoothSocket}
+ */
+public final class BluetoothDevice implements Parcelable, Attributable {
+    private static final String TAG = "BluetoothDevice";
+    private static final boolean DBG = false;
+
+    /**
+     * Connection state bitmask as returned by getConnectionState.
+     */
+    private static final int CONNECTION_STATE_DISCONNECTED = 0;
+    private static final int CONNECTION_STATE_CONNECTED = 1;
+    private static final int CONNECTION_STATE_ENCRYPTED_BREDR = 2;
+    private static final int CONNECTION_STATE_ENCRYPTED_LE = 4;
+
+    /**
+     * Sentinel error value for this class. Guaranteed to not equal any other
+     * integer constant in this class. Provided as a convenience for functions
+     * that require a sentinel error value, for example:
+     * <p><code>Intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
+     * BluetoothDevice.ERROR)</code>
+     */
+    public static final int ERROR = Integer.MIN_VALUE;
+
+    /**
+     * Broadcast Action: Remote device discovered.
+     * <p>Sent when a remote device is found during discovery.
+     * <p>Always contains the extra fields {@link #EXTRA_DEVICE} and {@link
+     * #EXTRA_CLASS}. Can contain the extra fields {@link #EXTRA_NAME} and/or
+     * {@link #EXTRA_RSSI} and/or {@link #EXTRA_IS_COORDINATED_SET_MEMBER} if they are available.
+     */
+    // TODO: Change API to not broadcast RSSI if not available (incoming connection)
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothScanPermission
+    @RequiresBluetoothLocationPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_SCAN)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_FOUND =
+            "android.bluetooth.device.action.FOUND";
+
+    /**
+     * Broadcast Action: Bluetooth class of a remote device has changed.
+     * <p>Always contains the extra fields {@link #EXTRA_DEVICE} and {@link
+     * #EXTRA_CLASS}.
+     * {@see BluetoothClass}
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CLASS_CHANGED =
+            "android.bluetooth.device.action.CLASS_CHANGED";
+
+    /**
+     * Broadcast Action: Indicates a low level (ACL) connection has been
+     * established with a remote device.
+     * <p>Always contains the extra field {@link #EXTRA_DEVICE}.
+     * <p>ACL connections are managed automatically by the Android Bluetooth
+     * stack.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_ACL_CONNECTED =
+            "android.bluetooth.device.action.ACL_CONNECTED";
+
+    /**
+     * Broadcast Action: Indicates that a low level (ACL) disconnection has
+     * been requested for a remote device, and it will soon be disconnected.
+     * <p>This is useful for graceful disconnection. Applications should use
+     * this intent as a hint to immediately terminate higher level connections
+     * (RFCOMM, L2CAP, or profile connections) to the remote device.
+     * <p>Always contains the extra field {@link #EXTRA_DEVICE}.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_ACL_DISCONNECT_REQUESTED =
+            "android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED";
+
+    /**
+     * Broadcast Action: Indicates a low level (ACL) disconnection from a
+     * remote device.
+     * <p>Always contains the extra field {@link #EXTRA_DEVICE}.
+     * <p>ACL connections are managed automatically by the Android Bluetooth
+     * stack.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_ACL_DISCONNECTED =
+            "android.bluetooth.device.action.ACL_DISCONNECTED";
+
+    /**
+     * Broadcast Action: Indicates the friendly name of a remote device has
+     * been retrieved for the first time, or changed since the last retrieval.
+     * <p>Always contains the extra fields {@link #EXTRA_DEVICE} and {@link
+     * #EXTRA_NAME}.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_NAME_CHANGED =
+            "android.bluetooth.device.action.NAME_CHANGED";
+
+    /**
+     * Broadcast Action: Indicates the alias of a remote device has been
+     * changed.
+     * <p>Always contains the extra field {@link #EXTRA_DEVICE}.
+     */
+    @SuppressLint("ActionValue")
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_ALIAS_CHANGED =
+            "android.bluetooth.device.action.ALIAS_CHANGED";
+
+    /**
+     * Broadcast Action: Indicates a change in the bond state of a remote
+     * device. For example, if a device is bonded (paired).
+     * <p>Always contains the extra fields {@link #EXTRA_DEVICE}, {@link
+     * #EXTRA_BOND_STATE} and {@link #EXTRA_PREVIOUS_BOND_STATE}.
+     */
+    // Note: When EXTRA_BOND_STATE is BOND_NONE then this will also
+    // contain a hidden extra field EXTRA_REASON with the result code.
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_BOND_STATE_CHANGED =
+            "android.bluetooth.device.action.BOND_STATE_CHANGED";
+
+     /**
+     * Broadcast Action: Broadcast details of IOT device when an IOT
+     * related issue is observed.
+     * <p>Always contains the extra fields {@link #EXTRA_NAME}.
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive.
+     * @hide
+     **/
+
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_REMOTE_ISSUE_OCCURRED  =
+            "org.codeaurora.intent.bluetooth.action.REMOTE_ISSUE_OCCURRED";
+
+    /**
+     * Broadcast Action: Indicates the battery level of a remote device has
+     * been retrieved for the first time, or changed since the last retrieval
+     * <p>Always contains the extra fields {@link #EXTRA_DEVICE} and {@link
+     * #EXTRA_BATTERY_LEVEL}.
+     *
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_BATTERY_LEVEL_CHANGED =
+            "android.bluetooth.device.action.BATTERY_LEVEL_CHANGED";
+
+    /**
+     * Used as an Integer extra field in {@link #ACTION_BATTERY_LEVEL_CHANGED}
+     * intent. It contains the most recently retrieved battery level information
+     * ranging from 0% to 100% for a remote device, {@link #BATTERY_LEVEL_UNKNOWN}
+     * when the valid is unknown or there is an error
+     *
+     * @hide
+     */
+    public static final String EXTRA_BATTERY_LEVEL =
+            "android.bluetooth.device.extra.BATTERY_LEVEL";
+
+    /**
+     * Used as the unknown value for {@link #EXTRA_BATTERY_LEVEL} and {@link #getBatteryLevel()}
+     *
+     * @hide
+     */
+    public static final int BATTERY_LEVEL_UNKNOWN = -1;
+
+    /**
+     * Used as an error value for {@link #getBatteryLevel()} to represent bluetooth is off
+     *
+     * @hide
+     */
+    public static final int BATTERY_LEVEL_BLUETOOTH_OFF = -100;
+
+    /**
+     * Broadcast Action: Indicates the remote devices are TWS plus earbuds pair.
+     * <p>Always contains the extra fields {@link #EXTRA_TWS_PLUS_DEVICE1},
+     * {@link #EXTRA_TWS_PLUS_DEVICE2}.
+     * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive.
+     * @hide
+     */
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_TWS_PLUS_DEVICE_PAIR =
+            "android.bluetooth.device.action.TWS_PLUS_DEVICE_PAIR";
+
+    /**
+     * Used as a Parcelable {@link BluetoothDevice} extra field in every intent
+     * broadcast by this class. It contains the {@link BluetoothDevice} that
+     * the intent applies to.
+     */
+    public static final String EXTRA_DEVICE = "android.bluetooth.device.extra.DEVICE";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_NAME_CHANGED} and {@link
+     * #ACTION_FOUND} intents. It contains the friendly Bluetooth name.
+     */
+    public static final String EXTRA_NAME = "android.bluetooth.device.extra.NAME";
+
+    /**
+     * Used as a Parcelable {@link BluetoothQualityReport} extra field in
+     * {@link #ACTION_REMOTE_ISSUE_OCCURRED} intent. It contains the {@link BluetoothQualityReport}.
+     * @hide
+     */
+    public static final String EXTRA_BQR = "android.bluetooth.qti.extra.EXTRA_BQR";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED}
+     * intents. It contains the type of IOT issue that occurred.
+     * @hide
+     */
+    public static final String EXTRA_ISSUE_TYPE = "android.bluetooth.qti.extra.ERROR_TYPE";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the details of details of the issue.
+     * @hide
+     */
+    public static final String EXTRA_ERROR_CODE = "android.bluetooth.qti.extra.ERROR_CODE";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the SoC event mask when issue occurred.
+     * @hide
+     */
+    public static final String EXTRA_ERROR_EVENT_MASK = "android.bluetooth.qti.extra.ERROR_EVENT_MASK";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the LMP Version of IOT device.
+     * @hide
+     */
+    public static final String EXTRA_LMP_VERSION = "android.bluetooth.qti.extra.EXTRA_LMP_VERSION";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the LMP Sub Version of IOT device.
+     * @hide
+     */
+    public static final String EXTRA_LMP_SUBVER = "android.bluetooth.qti.extra.EXTRA_LMP_SUBVER";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the Manufacturer ID of IOT device.
+     * @hide
+     */
+    public static final String EXTRA_MANUFACTURER = "android.bluetooth.qti.extra.EXTRA_MANUFACTURER";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the Power level.
+     * @hide
+     */
+    public static final String EXTRA_POWER_LEVEL = "android.bluetooth.qti.extra.EXTRA_POWER_LEVEL";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the Link Quality of the connection.
+     * @hide
+     */
+    public static final String EXTRA_LINK_QUALITY = "android.bluetooth.qti.extra.EXTRA_LINK_QUALITY";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_REMOTE_ISSUE_OCCURRED} intents.
+     * It contains the coutnt of glitches occured since last broadcast.
+     * @hide
+     */
+    public static final String EXTRA_GLITCH_COUNT = "android.bluetooth.qti.extra.EXTRA_GLITCH_COUNT";
+
+
+    /**
+     * Used as an optional short extra field in {@link #ACTION_FOUND} intents.
+     * Contains the RSSI value of the remote device as reported by the
+     * Bluetooth hardware.
+     */
+    public static final String EXTRA_RSSI = "android.bluetooth.device.extra.RSSI";
+
+    /**
+    * Used as an bool extra field in {@link #ACTION_FOUND} intents.
+    * It contains the information if device is discovered as member of a coordinated set or not.
+    * Pairing with device that belongs to a set would trigger pairing with the rest of set members.
+    * See Bluetooth CSIP specification for more details.
+    */
+    public static final String EXTRA_IS_COORDINATED_SET_MEMBER =
+            "android.bluetooth.extra.IS_COORDINATED_SET_MEMBER";
+
+    /**
+     * Used as a Parcelable {@link BluetoothClass} extra field in {@link
+     * #ACTION_FOUND} and {@link #ACTION_CLASS_CHANGED} intents.
+     */
+    public static final String EXTRA_CLASS = "android.bluetooth.device.extra.CLASS";
+
+    /**
+     * Used as an int extra field in {@link #ACTION_BOND_STATE_CHANGED} intents.
+     * Contains the bond state of the remote device.
+     * <p>Possible values are:
+     * {@link #BOND_NONE},
+     * {@link #BOND_BONDING},
+     * {@link #BOND_BONDED}.
+     */
+    public static final String EXTRA_BOND_STATE = "android.bluetooth.device.extra.BOND_STATE";
+    /**
+     * Used as an int extra field in {@link #ACTION_BOND_STATE_CHANGED} intents.
+     * Contains the previous bond state of the remote device.
+     * <p>Possible values are:
+     * {@link #BOND_NONE},
+     * {@link #BOND_BONDING},
+     * {@link #BOND_BONDED}.
+     */
+    public static final String EXTRA_PREVIOUS_BOND_STATE =
+            "android.bluetooth.device.extra.PREVIOUS_BOND_STATE";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_TWS+_DEVICE_PAIR}
+     * intents. It contains the first TWS+ earbud address of pair.
+     * @hide
+     */
+    public static final String EXTRA_TWS_PLUS_DEVICE1 =
+            "android.bluetooth.device.extra.EXTRA_TWS_PLUS_DEVICE1";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_TWS+_DEVICE_PAIR}
+     * intents. It contains the second TWS+ earbud address of pair.
+     * @hide
+     */
+    public static final String EXTRA_TWS_PLUS_DEVICE2 =
+            "android.bluetooth.device.extra.EXTRA_TWS_PLUS_DEVICE2";
+
+    /**
+     * Indicates the remote device is not bonded (paired).
+     * <p>There is no shared link key with the remote device, so communication
+     * (if it is allowed at all) will be unauthenticated and unencrypted.
+     */
+    public static final int BOND_NONE = 10;
+    /**
+     * Indicates bonding (pairing) is in progress with the remote device.
+     */
+    public static final int BOND_BONDING = 11;
+    /**
+     * Indicates the remote device is bonded (paired).
+     * <p>A shared link keys exists locally for the remote device, so
+     * communication can be authenticated and encrypted.
+     * <p><i>Being bonded (paired) with a remote device does not necessarily
+     * mean the device is currently connected. It just means that the pending
+     * procedure was completed at some earlier time, and the link key is still
+     * stored locally, ready to use on the next connection.
+     * </i>
+     */
+    public static final int BOND_BONDED = 12;
+
+    /**
+     * Used as an int extra field in {@link #ACTION_PAIRING_REQUEST}
+     * intents for unbond reason.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static final String EXTRA_REASON = "android.bluetooth.device.extra.REASON";
+
+    /**
+     * Used as an int extra field in {@link #ACTION_PAIRING_REQUEST}
+     * intents to indicate pairing method used. Possible values are:
+     * {@link #PAIRING_VARIANT_PIN},
+     * {@link #PAIRING_VARIANT_PASSKEY_CONFIRMATION},
+     */
+    public static final String EXTRA_PAIRING_VARIANT =
+            "android.bluetooth.device.extra.PAIRING_VARIANT";
+
+    /**
+     * Used as an int extra field in {@link #ACTION_PAIRING_REQUEST}
+     * intents as the value of passkey.
+     */
+    public static final String EXTRA_PAIRING_KEY = "android.bluetooth.device.extra.PAIRING_KEY";
+
+    /**
+     * Used as an int extra field in {@link #ACTION_PAIRING_REQUEST}
+     * intents as the value of passkey.
+     * @hide
+     */
+    public static final String EXTRA_PAIRING_INITIATOR =
+            "android.bluetooth.device.extra.PAIRING_INITIATOR";
+
+    /**
+     * Bluetooth pairing initiator, Foreground App
+     * @hide
+     */
+    public static final int EXTRA_PAIRING_INITIATOR_FOREGROUND = 1;
+
+    /**
+     * Bluetooth pairing initiator, Background
+     * @hide
+     */
+    public static final int EXTRA_PAIRING_INITIATOR_BACKGROUND = 2;
+
+    /**
+     * Bluetooth device type, Unknown
+     */
+    public static final int DEVICE_TYPE_UNKNOWN = 0;
+
+    /**
+     * Bluetooth device type, Classic - BR/EDR devices
+     */
+    public static final int DEVICE_TYPE_CLASSIC = 1;
+
+    /**
+     * Bluetooth device type, Low Energy - LE-only
+     */
+    public static final int DEVICE_TYPE_LE = 2;
+
+    /**
+     * Bluetooth device type, Dual Mode - BR/EDR/LE
+     */
+    public static final int DEVICE_TYPE_DUAL = 3;
+
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final String ACTION_SDP_RECORD =
+            "android.bluetooth.device.action.SDP_RECORD";
+
+    /** @hide */
+    @IntDef(prefix = "METADATA_", value = {
+            METADATA_MANUFACTURER_NAME,
+            METADATA_MODEL_NAME,
+            METADATA_SOFTWARE_VERSION,
+            METADATA_HARDWARE_VERSION,
+            METADATA_COMPANION_APP,
+            METADATA_MAIN_ICON,
+            METADATA_IS_UNTETHERED_HEADSET,
+            METADATA_UNTETHERED_LEFT_ICON,
+            METADATA_UNTETHERED_RIGHT_ICON,
+            METADATA_UNTETHERED_CASE_ICON,
+            METADATA_UNTETHERED_LEFT_BATTERY,
+            METADATA_UNTETHERED_RIGHT_BATTERY,
+            METADATA_UNTETHERED_CASE_BATTERY,
+            METADATA_UNTETHERED_LEFT_CHARGING,
+            METADATA_UNTETHERED_RIGHT_CHARGING,
+            METADATA_UNTETHERED_CASE_CHARGING,
+            METADATA_ENHANCED_SETTINGS_UI_URI,
+            METADATA_DEVICE_TYPE,
+            METADATA_MAIN_BATTERY,
+            METADATA_MAIN_CHARGING,
+            METADATA_MAIN_LOW_BATTERY_THRESHOLD,
+            METADATA_UNTETHERED_LEFT_LOW_BATTERY_THRESHOLD,
+            METADATA_UNTETHERED_RIGHT_LOW_BATTERY_THRESHOLD,
+            METADATA_UNTETHERED_CASE_LOW_BATTERY_THRESHOLD})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface MetadataKey{}
+
+    /**
+     * Maximum length of a metadata entry, this is to avoid exploding Bluetooth
+     * disk usage
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MAX_LENGTH = 2048;
+
+    /**
+     * Manufacturer name of this Bluetooth device
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MANUFACTURER_NAME = 0;
+
+    /**
+     * Model name of this Bluetooth device
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MODEL_NAME = 1;
+
+    /**
+     * Software version of this Bluetooth device
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_SOFTWARE_VERSION = 2;
+
+    /**
+     * Hardware version of this Bluetooth device
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_HARDWARE_VERSION = 3;
+
+    /**
+     * Package name of the companion app, if any
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_COMPANION_APP = 4;
+
+    /**
+     * URI to the main icon shown on the settings UI
+     * Data type should be {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MAIN_ICON = 5;
+
+    /**
+     * Whether this device is an untethered headset with left, right and case
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_IS_UNTETHERED_HEADSET = 6;
+
+    /**
+     * URI to icon of the left headset
+     * Data type should be {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_LEFT_ICON = 7;
+
+    /**
+     * URI to icon of the right headset
+     * Data type should be {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_RIGHT_ICON = 8;
+
+    /**
+     * URI to icon of the headset charging case
+     * Data type should be {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_CASE_ICON = 9;
+
+    /**
+     * Battery level of left headset
+     * Data type should be {@String} 0-100 as {@link Byte} array, otherwise
+     * as invalid.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_LEFT_BATTERY = 10;
+
+    /**
+     * Battery level of rigth headset
+     * Data type should be {@String} 0-100 as {@link Byte} array, otherwise
+     * as invalid.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_RIGHT_BATTERY = 11;
+
+    /**
+     * Battery level of the headset charging case
+     * Data type should be {@String} 0-100 as {@link Byte} array, otherwise
+     * as invalid.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_CASE_BATTERY = 12;
+
+    /**
+     * Whether the left headset is charging
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_LEFT_CHARGING = 13;
+
+    /**
+     * Whether the right headset is charging
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_RIGHT_CHARGING = 14;
+
+    /**
+     * Whether the headset charging case is charging
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_CASE_CHARGING = 15;
+
+    /**
+     * URI to the enhanced settings UI slice
+     * Data type should be {@String} as {@link Byte} array, null means
+     * the UI does not exist.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_ENHANCED_SETTINGS_UI_URI = 16;
+
+    /**
+     * Type of the Bluetooth device, must be within the list of
+     * BluetoothDevice.DEVICE_TYPE_*
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_DEVICE_TYPE = 17;
+
+    /**
+     * Battery level of the Bluetooth device, use when the Bluetooth device
+     * does not support HFP battery indicator.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MAIN_BATTERY = 18;
+
+    /**
+     * Whether the device is charging.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MAIN_CHARGING = 19;
+
+    /**
+     * The battery threshold of the Bluetooth device to show low battery icon.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_MAIN_LOW_BATTERY_THRESHOLD = 20;
+
+    /**
+     * The battery threshold of the left headset to show low battery icon.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_LEFT_LOW_BATTERY_THRESHOLD = 21;
+
+    /**
+     * The battery threshold of the right headset to show low battery icon.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_RIGHT_LOW_BATTERY_THRESHOLD = 22;
+
+    /**
+     * The battery threshold of the case to show low battery icon.
+     * Data type should be {@String} as {@link Byte} array.
+     * @hide
+     */
+    @SystemApi
+    public static final int METADATA_UNTETHERED_CASE_LOW_BATTERY_THRESHOLD = 23;
+
+    /**
+     * Device type which is used in METADATA_DEVICE_TYPE
+     * Indicates this Bluetooth device is a standard Bluetooth accessory or
+     * not listed in METADATA_DEVICE_TYPE_*.
+     * @hide
+     */
+    @SystemApi
+    public static final String DEVICE_TYPE_DEFAULT = "Default";
+
+    /**
+     * Device type which is used in METADATA_DEVICE_TYPE
+     * Indicates this Bluetooth device is a watch.
+     * @hide
+     */
+    @SystemApi
+    public static final String DEVICE_TYPE_WATCH = "Watch";
+
+    /**
+     * Device type which is used in METADATA_DEVICE_TYPE
+     * Indicates this Bluetooth device is an untethered headset.
+     * @hide
+     */
+    @SystemApi
+    public static final String DEVICE_TYPE_UNTETHERED_HEADSET = "Untethered Headset";
+
+    /**
+     * Broadcast Action: This intent is used to broadcast the {@link UUID}
+     * wrapped as a {@link android.os.ParcelUuid} of the remote device after it
+     * has been fetched. This intent is sent only when the UUIDs of the remote
+     * device are requested to be fetched using Service Discovery Protocol
+     * <p> Always contains the extra field {@link #EXTRA_DEVICE}
+     * <p> Always contains the extra field {@link #EXTRA_UUID}
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_UUID =
+            "android.bluetooth.device.action.UUID";
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_MAS_INSTANCE =
+            "android.bluetooth.device.action.MAS_INSTANCE";
+
+    /**
+     * Broadcast Action: Indicates a failure to retrieve the name of a remote
+     * device.
+     * <p>Always contains the extra field {@link #EXTRA_DEVICE}.
+     *
+     * @hide
+     */
+    //TODO: is this actually useful?
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_NAME_FAILED =
+            "android.bluetooth.device.action.NAME_FAILED";
+
+    /**
+     * Broadcast Action: This intent is used to broadcast PAIRING REQUEST
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_PAIRING_REQUEST =
+            "android.bluetooth.device.action.PAIRING_REQUEST";
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage
+    public static final String ACTION_PAIRING_CANCEL =
+            "android.bluetooth.device.action.PAIRING_CANCEL";
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CONNECTION_ACCESS_REQUEST =
+            "android.bluetooth.device.action.CONNECTION_ACCESS_REQUEST";
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CONNECTION_ACCESS_REPLY =
+            "android.bluetooth.device.action.CONNECTION_ACCESS_REPLY";
+
+    /** @hide */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_CONNECTION_ACCESS_CANCEL =
+            "android.bluetooth.device.action.CONNECTION_ACCESS_CANCEL";
+
+    /**
+     * Intent to broadcast silence mode changed.
+     * Alway contains the extra field {@link #EXTRA_DEVICE}
+     *
+     * @hide
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @SystemApi
+    public static final String ACTION_SILENCE_MODE_CHANGED =
+            "android.bluetooth.device.action.SILENCE_MODE_CHANGED";
+
+    /**
+     * Used as an extra field in {@link #ACTION_CONNECTION_ACCESS_REQUEST} intent.
+     *
+     * @hide
+     */
+    public static final String EXTRA_ACCESS_REQUEST_TYPE =
+            "android.bluetooth.device.extra.ACCESS_REQUEST_TYPE";
+
+    /** @hide */
+    public static final int REQUEST_TYPE_PROFILE_CONNECTION = 1;
+
+    /** @hide */
+    public static final int REQUEST_TYPE_PHONEBOOK_ACCESS = 2;
+
+    /** @hide */
+    public static final int REQUEST_TYPE_MESSAGE_ACCESS = 3;
+
+    /** @hide */
+    public static final int REQUEST_TYPE_SIM_ACCESS = 4;
+
+    /**
+     * Used as an extra field in {@link #ACTION_CONNECTION_ACCESS_REQUEST} intents,
+     * Contains package name to return reply intent to.
+     *
+     * @hide
+     */
+    public static final String EXTRA_PACKAGE_NAME = "android.bluetooth.device.extra.PACKAGE_NAME";
+
+    /**
+     * Used as an extra field in {@link #ACTION_CONNECTION_ACCESS_REQUEST} intents,
+     * Contains class name to return reply intent to.
+     *
+     * @hide
+     */
+    public static final String EXTRA_CLASS_NAME = "android.bluetooth.device.extra.CLASS_NAME";
+
+    /**
+     * Used as an extra field in {@link #ACTION_CONNECTION_ACCESS_REPLY} intent.
+     *
+     * @hide
+     */
+    public static final String EXTRA_CONNECTION_ACCESS_RESULT =
+            "android.bluetooth.device.extra.CONNECTION_ACCESS_RESULT";
+
+    /** @hide */
+    public static final int CONNECTION_ACCESS_YES = 1;
+
+    /** @hide */
+    public static final int CONNECTION_ACCESS_NO = 2;
+
+    /**
+     * Used as an extra field in {@link #ACTION_CONNECTION_ACCESS_REPLY} intents,
+     * Contains boolean to indicate if the allowed response is once-for-all so that
+     * next request will be granted without asking user again.
+     *
+     * @hide
+     */
+    public static final String EXTRA_ALWAYS_ALLOWED =
+            "android.bluetooth.device.extra.ALWAYS_ALLOWED";
+
+    /**
+     * A bond attempt succeeded
+     *
+     * @hide
+     */
+    public static final int BOND_SUCCESS = 0;
+
+    /**
+     * A bond attempt failed because pins did not match, or remote device did
+     * not respond to pin request in time
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_AUTH_FAILED = 1;
+
+    /**
+     * A bond attempt failed because the other side explicitly rejected
+     * bonding
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_AUTH_REJECTED = 2;
+
+    /**
+     * A bond attempt failed because we canceled the bonding process
+     *
+     * @hide
+     */
+    public static final int UNBOND_REASON_AUTH_CANCELED = 3;
+
+    /**
+     * A bond attempt failed because we could not contact the remote device
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_REMOTE_DEVICE_DOWN = 4;
+
+    /**
+     * A bond attempt failed because a discovery is in progress
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_DISCOVERY_IN_PROGRESS = 5;
+
+    /**
+     * A bond attempt failed because of authentication timeout
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_AUTH_TIMEOUT = 6;
+
+    /**
+     * A bond attempt failed because of repeated attempts
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_REPEATED_ATTEMPTS = 7;
+
+    /**
+     * A bond attempt failed because we received an Authentication Cancel
+     * by remote end
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final int UNBOND_REASON_REMOTE_AUTH_CANCELED = 8;
+
+    /**
+     * An existing bond was explicitly revoked
+     *
+     * @hide
+     */
+    public static final int UNBOND_REASON_REMOVED = 9;
+
+    /**
+     * The user will be prompted to enter a pin or
+     * an app will enter a pin for user.
+     */
+    public static final int PAIRING_VARIANT_PIN = 0;
+
+    /**
+     * The user will be prompted to enter a passkey
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_PASSKEY = 1;
+
+    /**
+     * The user will be prompted to confirm the passkey displayed on the screen or
+     * an app will confirm the passkey for the user.
+     */
+    public static final int PAIRING_VARIANT_PASSKEY_CONFIRMATION = 2;
+
+    /**
+     * The user will be prompted to accept or deny the incoming pairing request
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_CONSENT = 3;
+
+    /**
+     * The user will be prompted to enter the passkey displayed on remote device
+     * This is used for Bluetooth 2.1 pairing.
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_DISPLAY_PASSKEY = 4;
+
+    /**
+     * The user will be prompted to enter the PIN displayed on remote device.
+     * This is used for Bluetooth 2.0 pairing.
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_DISPLAY_PIN = 5;
+
+    /**
+     * The user will be prompted to accept or deny the OOB pairing request
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_OOB_CONSENT = 6;
+
+    /**
+     * The user will be prompted to enter a 16 digit pin or
+     * an app will enter a 16 digit pin for user.
+     *
+     * @hide
+     */
+    public static final int PAIRING_VARIANT_PIN_16_DIGITS = 7;
+
+    /**
+     * Used as an extra field in {@link #ACTION_UUID} intents,
+     * Contains the {@link android.os.ParcelUuid}s of the remote device which
+     * is a parcelable version of {@link UUID}.
+     */
+    public static final String EXTRA_UUID = "android.bluetooth.device.extra.UUID";
+
+    /** @hide */
+    public static final String EXTRA_SDP_RECORD =
+            "android.bluetooth.device.extra.SDP_RECORD";
+
+    /** @hide */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static final String EXTRA_SDP_SEARCH_STATUS =
+            "android.bluetooth.device.extra.SDP_SEARCH_STATUS";
+
+    /** @hide */
+    @IntDef(prefix = "ACCESS_", value = {ACCESS_UNKNOWN,
+            ACCESS_ALLOWED, ACCESS_REJECTED})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface AccessPermission{}
+
+    /**
+     * For {@link #getPhonebookAccessPermission}, {@link #setPhonebookAccessPermission},
+     * {@link #getMessageAccessPermission} and {@link #setMessageAccessPermission}.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int ACCESS_UNKNOWN = 0;
+
+    /**
+     * For {@link #getPhonebookAccessPermission}, {@link #setPhonebookAccessPermission},
+     * {@link #getMessageAccessPermission} and {@link #setMessageAccessPermission}.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int ACCESS_ALLOWED = 1;
+
+    /**
+     * For {@link #getPhonebookAccessPermission}, {@link #setPhonebookAccessPermission},
+     * {@link #getMessageAccessPermission} and {@link #setMessageAccessPermission}.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int ACCESS_REJECTED = 2;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+        prefix = { "TRANSPORT_" },
+        value = {
+            /** Allow host to automatically select a transport (dual-mode only) */
+            TRANSPORT_AUTO,
+            /** Use Classic or BR/EDR transport.*/
+            TRANSPORT_BREDR,
+            /** Use Low Energy transport.*/
+            TRANSPORT_LE,
+        }
+    )
+    public @interface Transport {}
+
+    /**
+     * No preference of physical transport for GATT connections to remote dual-mode devices
+     */
+    public static final int TRANSPORT_AUTO = 0;
+
+    /**
+     * Prefer BR/EDR transport for GATT connections to remote dual-mode devices
+     */
+    public static final int TRANSPORT_BREDR = 1;
+
+    /**
+     * Prefer LE transport for GATT connections to remote dual-mode devices
+     */
+    public static final int TRANSPORT_LE = 2;
+
+    /**
+     * Bluetooth LE 1M PHY. Used to refer to LE 1M Physical Channel for advertising, scanning or
+     * connection.
+     */
+    public static final int PHY_LE_1M = 1;
+
+    /**
+     * Bluetooth LE 2M PHY. Used to refer to LE 2M Physical Channel for advertising, scanning or
+     * connection.
+     */
+    public static final int PHY_LE_2M = 2;
+
+    /**
+     * Bluetooth LE Coded PHY. Used to refer to LE Coded Physical Channel for advertising, scanning
+     * or connection.
+     */
+    public static final int PHY_LE_CODED = 3;
+
+    /**
+     * Bluetooth LE 1M PHY mask. Used to specify LE 1M Physical Channel as one of many available
+     * options in a bitmask.
+     */
+    public static final int PHY_LE_1M_MASK = 1;
+
+    /**
+     * Bluetooth LE 2M PHY mask. Used to specify LE 2M Physical Channel as one of many available
+     * options in a bitmask.
+     */
+    public static final int PHY_LE_2M_MASK = 2;
+
+    /**
+     * Bluetooth LE Coded PHY mask. Used to specify LE Coded Physical Channel as one of many
+     * available options in a bitmask.
+     */
+    public static final int PHY_LE_CODED_MASK = 4;
+
+    /**
+     * No preferred coding when transmitting on the LE Coded PHY.
+     */
+    public static final int PHY_OPTION_NO_PREFERRED = 0;
+
+    /**
+     * Prefer the S=2 coding to be used when transmitting on the LE Coded PHY.
+     */
+    public static final int PHY_OPTION_S2 = 1;
+
+    /**
+     * Prefer the S=8 coding to be used when transmitting on the LE Coded PHY.
+     */
+    public static final int PHY_OPTION_S8 = 2;
+
+
+    /** @hide */
+    public static final String EXTRA_MAS_INSTANCE =
+            "android.bluetooth.device.extra.MAS_INSTANCE";
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+        prefix = { "ADDRESS_TYPE_" },
+        value = {
+            /** Hardware MAC Address */
+            ADDRESS_TYPE_PUBLIC,
+            /** Address is either resolvable, non-resolvable or static.*/
+            ADDRESS_TYPE_RANDOM,
+        }
+    )
+    public @interface AddressType {}
+
+    /** Hardware MAC Address of the device */
+    public static final int ADDRESS_TYPE_PUBLIC = 0;
+    /** Address is either resolvable, non-resolvable or static. */
+    public static final int ADDRESS_TYPE_RANDOM = 1;
+
+    private static final String NULL_MAC_ADDRESS = "00:00:00:00:00:00";
+
+    /**
+     * Lazy initialization. Guaranteed final after first object constructed, or
+     * getService() called.
+     * TODO: Unify implementation of sService amongst BluetoothFoo API's
+     */
+    private static volatile IBluetooth sService;
+
+    private final String mAddress;
+    @AddressType private final int mAddressType;
+
+    private AttributionSource mAttributionSource;
+
+    /*package*/
+    @UnsupportedAppUsage
+    static IBluetooth getService() {
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+        IBluetooth tService = adapter.getBluetoothService(sStateChangeCallback);
+
+        synchronized (BluetoothDevice.class) {
+            if (sService == null) {
+                sService = tService;
+            }
+        }
+        return sService;
+    }
+
+    static IBluetoothManagerCallback sStateChangeCallback = new IBluetoothManagerCallback.Stub() {
+
+        public void onBluetoothServiceUp(IBluetooth bluetoothService)
+                throws RemoteException {
+            synchronized (BluetoothDevice.class) {
+                if (sService != null) {
+                    Log.w(TAG, "sService is not NULL");
+                }
+                sService = bluetoothService;
+            }
+        }
+
+        public void onBluetoothServiceDown()
+                throws RemoteException {
+            synchronized (BluetoothDevice.class) {
+                sService = null;
+            }
+        }
+
+        public void onBrEdrDown() {
+            if (DBG) Log.d(TAG, "onBrEdrDown: reached BLE ON state");
+        }
+
+        public void onOobData(@Transport int transport, OobData oobData) {
+            if (DBG) Log.d(TAG, "onOobData: got data");
+        }
+    };
+
+    /**
+     * Create a new BluetoothDevice
+     * Bluetooth MAC address must be upper case, such as "00:11:22:33:AA:BB",
+     * and is validated in this constructor.
+     *
+     * @param address valid Bluetooth MAC address
+     * @param attributionSource attribution for permission-protected calls
+     * @throws RuntimeException Bluetooth is not available on this platform
+     * @throws IllegalArgumentException address is invalid
+     * @hide
+     */
+    @UnsupportedAppUsage
+    /*package*/ BluetoothDevice(String address) {
+        getService();  // ensures sService is initialized
+        if (!BluetoothAdapter.checkBluetoothAddress(address)) {
+            throw new IllegalArgumentException(address + " is not a valid Bluetooth address");
+        }
+
+        mAddress = address;
+        mAddressType = ADDRESS_TYPE_PUBLIC;
+        mAttributionSource = AttributionSource.myAttributionSource();
+    }
+
+    /** {@hide} */
+    public void setAttributionSource(@NonNull AttributionSource attributionSource) {
+        mAttributionSource = attributionSource;
+    }
+
+    /** {@hide} */
+    public void prepareToEnterProcess(@NonNull AttributionSource attributionSource) {
+        setAttributionSource(attributionSource);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (o instanceof BluetoothDevice) {
+            return mAddress.equals(((BluetoothDevice) o).getAddress());
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return mAddress.hashCode();
+    }
+
+    /**
+     * Returns a string representation of this BluetoothDevice.
+     * <p>Currently this is the Bluetooth hardware address, for example
+     * "00:11:22:AA:BB:CC". However, you should always use {@link #getAddress}
+     * if you explicitly require the Bluetooth hardware address in case the
+     * {@link #toString} representation changes in the future.
+     *
+     * @return string representation of this BluetoothDevice
+     */
+    @Override
+    public String toString() {
+        return mAddress;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final @android.annotation.NonNull Parcelable.Creator<BluetoothDevice> CREATOR =
+            new Parcelable.Creator<BluetoothDevice>() {
+                public BluetoothDevice createFromParcel(Parcel in) {
+                    return new BluetoothDevice(in.readString());
+                }
+
+                public BluetoothDevice[] newArray(int size) {
+                    return new BluetoothDevice[size];
+                }
+            };
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeString(mAddress);
+    }
+
+    /**
+     * Returns the hardware address of this BluetoothDevice.
+     * <p> For example, "00:11:22:AA:BB:CC".
+     *
+     * @return Bluetooth hardware address as string
+     */
+    public String getAddress() {
+        if (DBG) Log.d(TAG, "mAddress: " + mAddress);
+        return mAddress;
+    }
+
+    /**
+     * Returns the anonymized hardware address of this BluetoothDevice. The first three octets
+     * will be suppressed for anonymization.
+     * <p> For example, "XX:XX:XX:AA:BB:CC".
+     *
+     * @return Anonymized bluetooth hardware address as string
+     * @hide
+     */
+    public String getAnonymizedAddress() {
+        return "XX:XX:XX" + getAddress().substring(8);
+    }
+
+    /**
+     * Get the friendly Bluetooth name of the remote device.
+     *
+     * <p>The local adapter will automatically retrieve remote names when
+     * performing a device scan, and will cache them. This method just returns
+     * the name for this device from the cache.
+     *
+     * @return the Bluetooth name, or null if there was a problem.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public String getName() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot get Remote Device name");
+            return null;
+        }
+        try {
+            String name = service.getRemoteName(this, mAttributionSource);
+            if (name != null) {
+                // remove whitespace characters from the name
+                return name
+                        .replace('\t', ' ')
+                        .replace('\n', ' ')
+                        .replace('\r', ' ');
+            }
+            return null;
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return null;
+    }
+
+    /**
+     * Get the Bluetooth device type of the remote device.
+     *
+     * @return the device type {@link #DEVICE_TYPE_CLASSIC}, {@link #DEVICE_TYPE_LE} {@link
+     * #DEVICE_TYPE_DUAL}. {@link #DEVICE_TYPE_UNKNOWN} if it's not available
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public int getType() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot get Remote Device type");
+            return DEVICE_TYPE_UNKNOWN;
+        }
+        try {
+            return service.getRemoteType(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return DEVICE_TYPE_UNKNOWN;
+    }
+
+    /**
+     * Get the locally modifiable name (alias) of the remote Bluetooth device.
+     *
+     * @return the Bluetooth alias, the friendly device name if no alias, or
+     * null if there was a problem
+     */
+    @Nullable
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public String getAlias() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot get Remote Device Alias");
+            return null;
+        }
+        try {
+            String alias = service.getRemoteAliasWithAttribution(this, mAttributionSource);
+            if (alias == null) {
+                return getName();
+            }
+            return alias
+                    .replace('\t', ' ')
+                    .replace('\n', ' ')
+                    .replace('\r', ' ');
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return null;
+    }
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(value = {
+            BluetoothStatusCodes.SUCCESS,
+            BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED,
+            BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ALLOWED,
+            BluetoothStatusCodes.ERROR_MISSING_BLUETOOTH_CONNECT_PERMISSION,
+            BluetoothStatusCodes.ERROR_DEVICE_NOT_BONDED
+    })
+    public @interface SetAliasReturnValues{}
+
+    /**
+     * Sets the locally modifiable name (alias) of the remote Bluetooth device. This method
+     * overwrites the previously stored alias. The new alias is saved in local
+     * storage so that the change is preserved over power cycles.
+     *
+     * <p>This method requires the calling app to be associated with Companion Device Manager (see
+     * {@link android.companion.CompanionDeviceManager#associate(AssociationRequest,
+     * android.companion.CompanionDeviceManager.Callback, Handler)}) and have the
+     * {@link android.Manifest.permission#BLUETOOTH_CONNECT} permission. Alternatively, if the
+     * caller has the {@link android.Manifest.permission#BLUETOOTH_PRIVILEGED} permission, they can
+     * bypass the Companion Device Manager association requirement as well as other permission
+     * requirements.
+     *
+     * @param alias is the new locally modifiable name for the remote Bluetooth device which must
+     *              be the empty string. If null, we clear the alias.
+     * @return whether the alias was successfully changed
+     * @throws IllegalArgumentException if the alias is the empty string
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @SetAliasReturnValues int setAlias(@Nullable String alias) {
+        if (alias != null && alias.isEmpty()) {
+            throw new IllegalArgumentException("alias cannot be the empty string");
+        }
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot set Remote Device name");
+            return BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED;
+        }
+        try {
+            return service.setRemoteAlias(this, alias, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Get the most recent identified battery level of this Bluetooth device
+     *
+     * @return Battery level in percents from 0 to 100, {@link #BATTERY_LEVEL_BLUETOOTH_OFF} if
+     * Bluetooth is disabled or {@link #BATTERY_LEVEL_UNKNOWN} if device is disconnected, or does
+     * not have any battery reporting service, or return value is invalid
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public int getBatteryLevel() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "Bluetooth disabled. Cannot get remote device battery level");
+            return BATTERY_LEVEL_BLUETOOTH_OFF;
+        }
+        try {
+            return service.getBatteryLevel(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return BATTERY_LEVEL_UNKNOWN;
+    }
+
+    /**
+     * Start the bonding (pairing) process with the remote device.
+     * <p>This is an asynchronous call, it will return immediately. Register
+     * for {@link #ACTION_BOND_STATE_CHANGED} intents to be notified when
+     * the bonding process completes, and its result.
+     * <p>Android system services will handle the necessary user interactions
+     * to confirm and complete the bonding process.
+     *
+     * @return false on immediate error, true if bonding will begin
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean createBond() {
+        return createBond(TRANSPORT_AUTO);
+    }
+
+    /**
+     * Start the bonding (pairing) process with the remote device using the
+     * specified transport.
+     *
+     * <p>This is an asynchronous call, it will return immediately. Register
+     * for {@link #ACTION_BOND_STATE_CHANGED} intents to be notified when
+     * the bonding process completes, and its result.
+     * <p>Android system services will handle the necessary user interactions
+     * to confirm and complete the bonding process.
+     *
+     * @param transport The transport to use for the pairing procedure.
+     * @return false on immediate error, true if bonding will begin
+     * @throws IllegalArgumentException if an invalid transport was specified
+     * @hide
+     */
+    @SystemApi
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean createBond(int transport) {
+        return createBondInternal(transport, null, null);
+    }
+
+    /**
+     * Start the bonding (pairing) process with the remote device using the
+     * Out Of Band mechanism.
+     *
+     * <p>This is an asynchronous call, it will return immediately. Register
+     * for {@link #ACTION_BOND_STATE_CHANGED} intents to be notified when
+     * the bonding process completes, and its result.
+     *
+     * <p>Android system services will handle the necessary user interactions
+     * to confirm and complete the bonding process.
+     *
+     * <p>There are two possible versions of OOB Data.  This data can come in as
+     * P192 or P256.  This is a reference to the cryptography used to generate the key.
+     * The caller may pass one or both.  If both types of data are passed, then the
+     * P256 data will be preferred, and thus used.
+     *
+     * @param transport - Transport to use
+     * @param remoteP192Data - Out Of Band data (P192) or null
+     * @param remoteP256Data - Out Of Band data (P256) or null
+     * @return false on immediate error, true if bonding will begin
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean createBondOutOfBand(int transport, @Nullable OobData remoteP192Data,
+            @Nullable OobData remoteP256Data) {
+        if (remoteP192Data == null && remoteP256Data == null) {
+            throw new IllegalArgumentException(
+                "One or both arguments for the OOB data types are required to not be null."
+                + "  Please use createBond() instead if you do not have OOB data to pass.");
+        }
+        return createBondInternal(transport, remoteP192Data, remoteP256Data);
+    }
+
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    private boolean createBondInternal(int transport, @Nullable OobData remoteP192Data,
+            @Nullable OobData remoteP256Data) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.w(TAG, "BT not enabled, createBondOutOfBand failed");
+            return false;
+        }
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+        if (adapter != null &&
+                (((transport == TRANSPORT_LE || transport == TRANSPORT_AUTO)
+                    && !adapter.isLeEnabled())
+                || ((transport == TRANSPORT_BREDR || transport == TRANSPORT_AUTO)
+                    && !isBluetoothEnabled()))) {
+            Log.w(TAG, "creatBond() initiated in improper adapter state : " + adapter.getState()
+                    + " transport = " + transport);
+            return false;
+        }
+        if (NULL_MAC_ADDRESS.equals(mAddress)) {
+            Log.e(TAG, "Unable to create bond, invalid address " + mAddress);
+            return false;
+        }
+        try {
+            return service.createBond(
+                    this, transport, remoteP192Data, remoteP256Data, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Gets whether bonding was initiated locally
+     *
+     * @return true if bonding is initiated locally, false otherwise
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean isBondingInitiatedLocally() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.w(TAG, "BT not enabled, isBondingInitiatedLocally failed");
+            return false;
+        }
+        try {
+            return service.isBondingInitiatedLocally(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public void setBondingInitiatedLocally(boolean localInitiated) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.w(TAG, "BT not enabled, setBondingInitiatedLocally failed");
+            return;
+        }
+        try {
+            service.setBondingInitiatedLocally(this, localInitiated, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return;
+    }
+
+    /**
+     * Cancel an in-progress bonding request started with {@link #createBond}.
+     *
+     * @return true on success, false on error
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean cancelBondProcess() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot cancel Remote Device bond");
+            return false;
+        }
+        try {
+            Log.i(TAG, "cancelBondProcess() for device " + getAddress()
+                    + " called by pid: " + Process.myPid()
+                    + " tid: " + Process.myTid());
+            return service.cancelBondProcess(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Remove bond (pairing) with the remote device.
+     * <p>Delete the link key associated with the remote device, and
+     * immediately terminate connections to that device that require
+     * authentication and encryption.
+     *
+     * @return true on success, false on error
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean removeBond() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot remove Remote Device bond");
+            return false;
+        }
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+        if (adapter != null && !adapter.isLeEnabled()) {
+            Log.w(TAG, "removeBond() initiated in improper adapter state : "
+                    + adapter.getState());
+            return false;
+        }
+
+        try {
+            Log.i(TAG, "removeBond() for device " + getAddress()
+                    + " called by pid: " + Process.myPid()
+                    + " tid: " + Process.myTid());
+            return service.removeBond(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /*
+    private static final String BLUETOOTH_BONDING_CACHE_PROPERTY =
+            "cache_key.bluetooth.get_bond_state";
+    private final PropertyInvalidatedCache<BluetoothDevice, Integer> mBluetoothBondCache =
+            new PropertyInvalidatedCache<BluetoothDevice, Integer>(
+                8, BLUETOOTH_BONDING_CACHE_PROPERTY) {
+                @Override
+                @SuppressLint("AndroidFrameworkRequiresPermission")
+                public Integer recompute(BluetoothDevice query) {
+                    try {
+                        return sService.getBondState(query, mAttributionSource);
+                    } catch (RemoteException e) {
+                        throw e.rethrowAsRuntimeException();
+                    }
+                }
+            };
+     */
+
+    /** @hide */
+    /* public void disableBluetoothGetBondStateCache() {
+        mBluetoothBondCache.disableLocal();
+    } */
+
+    /** @hide */
+    /*
+    public static void invalidateBluetoothGetBondStateCache() {
+        PropertyInvalidatedCache.invalidateCache(BLUETOOTH_BONDING_CACHE_PROPERTY);
+    }
+     */
+
+    /**
+     * Get the bond state of the remote device.
+     * <p>Possible values for the bond state are:
+     * {@link #BOND_NONE},
+     * {@link #BOND_BONDING},
+     * {@link #BOND_BONDED}.
+     *
+     * @return the bond state
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public int getBondState() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot get bond state");
+            return BOND_NONE;
+        }
+        try {
+            //return mBluetoothBondCache.query(this);
+            return sService.getBondState(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "failed to ", e);
+            e.rethrowFromSystemServer();
+        }
+        return BOND_NONE;
+    }
+
+    /**
+     * Checks whether this bluetooth device is associated with CDM and meets the criteria to skip
+     * the bluetooth pairing dialog because it has been already consented by the CDM prompt.
+     *
+     * @return true if we can bond without the dialog, false otherwise
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean canBondWithoutDialog() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot check if we can skip pairing dialog");
+            return false;
+        }
+        try {
+            if (DBG) Log.d(TAG, "canBondWithoutDialog, device: " + this);
+            return service.canBondWithoutDialog(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(value = {
+            BluetoothStatusCodes.SUCCESS,
+            BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED,
+            BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ALLOWED,
+            BluetoothStatusCodes.ERROR_MISSING_BLUETOOTH_CONNECT_PERMISSION,
+            BluetoothStatusCodes.ERROR_DEVICE_NOT_BONDED
+    })
+    public @interface ConnectionReturnValues{}
+
+    /**
+     * Connects all user enabled and supported bluetooth profiles between the local and remote
+     * device. If no profiles are user enabled (e.g. first connection), we connect all supported
+     * profiles. If the device is not already connected, this will page the device before initiating
+     * profile connections. Connection is asynchronous and you should listen to each profile's
+     * broadcast intent ACTION_CONNECTION_STATE_CHANGED to verify whether connection was successful.
+     * For example, to verify a2dp is connected, you would listen for
+     * {@link BluetoothA2dp#ACTION_CONNECTION_STATE_CHANGED}
+     *
+     * @return whether the messages were successfully sent to try to connect all profiles
+     * @throws IllegalArgumentException if the device address is invalid
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+            android.Manifest.permission.MODIFY_PHONE_STATE,
+    })
+    public @ConnectionReturnValues int connect() {
+        if (!BluetoothAdapter.checkBluetoothAddress(getAddress())) {
+            throw new IllegalArgumentException("device cannot have an invalid address");
+        }
+
+        try {
+            if (sService == null) {
+                Log.e(TAG, "BT not enabled. Cannot connect to remote device.");
+                return BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED;
+            }
+            return sService.connectAllEnabledProfiles(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Disconnects all connected bluetooth profiles between the local and remote device.
+     * Disconnection is asynchronous and you should listen to each profile's broadcast intent
+     * ACTION_CONNECTION_STATE_CHANGED to verify whether disconnection was successful. For example,
+     * to verify a2dp is disconnected, you would listen for
+     * {@link BluetoothA2dp#ACTION_CONNECTION_STATE_CHANGED}
+     *
+     * @return whether the messages were successfully sent to try to disconnect all profiles
+     * @throws IllegalArgumentException if the device address is invalid
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public @ConnectionReturnValues int disconnect() {
+        if (!BluetoothAdapter.checkBluetoothAddress(getAddress())) {
+            throw new IllegalArgumentException("device cannot have an invalid address");
+        }
+
+        try {
+            if (sService == null) {
+                Log.e(TAG, "BT not enabled. Cannot disconnect from remote device.");
+                return BluetoothStatusCodes.ERROR_BLUETOOTH_NOT_ENABLED;
+            }
+            return sService.disconnectAllEnabledProfiles(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Returns whether there is an open connection to this device.
+     *
+     * @return True if there is at least one open connection to this device.
+     * @hide
+     */
+    @SystemApi
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean isConnected() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            // BT is not enabled, we cannot be connected.
+            return false;
+        }
+        try {
+            return service.getConnectionStateWithAttribution(this, mAttributionSource)
+                    != CONNECTION_STATE_DISCONNECTED;
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+            return false;
+        }
+    }
+
+    /**
+     * Returns whether there is an open connection to this device
+     * that has been encrypted.
+     *
+     * @return True if there is at least one encrypted connection to this device.
+     * @hide
+     */
+    @SystemApi
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean isEncrypted() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            // BT is not enabled, we cannot be connected.
+            return false;
+        }
+        try {
+            return service.getConnectionStateWithAttribution(this, mAttributionSource)
+                    > CONNECTION_STATE_CONNECTED;
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+            return false;
+        }
+    }
+
+    /**
+     * Get the Bluetooth class of the remote device.
+     *
+     * @return Bluetooth class object, or null on error
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothClass getBluetoothClass() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot get Bluetooth Class");
+            return null;
+        }
+        try {
+            int classInt = service.getRemoteClass(this, mAttributionSource);
+            if (classInt == BluetoothClass.ERROR) return null;
+            return new BluetoothClass(classInt);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return null;
+    }
+
+    /**
+     * Returns the supported features (UUIDs) of the remote device.
+     *
+     * <p>This method does not start a service discovery procedure to retrieve the UUIDs
+     * from the remote device. Instead, the local cached copy of the service
+     * UUIDs are returned.
+     * <p>Use {@link #fetchUuidsWithSdp} if fresh UUIDs are desired.
+     *
+     * @return the supported features (UUIDs) of the remote device, or null on error
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public ParcelUuid[] getUuids() {
+        final IBluetooth service = sService;
+        if (service == null || !isBluetoothEnabled()) {
+            Log.e(TAG, "BT not enabled. Cannot get remote device Uuids");
+            return null;
+        }
+        try {
+            return service.getRemoteUuids(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return null;
+    }
+
+    /**
+     * Perform a service discovery on the remote device to get the UUIDs supported.
+     *
+     * <p>This API is asynchronous and {@link #ACTION_UUID} intent is sent,
+     * with the UUIDs supported by the remote end. If there is an error
+     * in getting the SDP records or if the process takes a long time, or the device is bonding and
+     * we have its UUIDs cached, {@link #ACTION_UUID} intent is sent with the UUIDs that is
+     * currently present in the cache. Clients should use the {@link #getUuids} to get UUIDs
+     * if service discovery is not to be performed. If there is an ongoing bonding process,
+     * service discovery or device inquiry, the request will be queued.
+     *
+     * @return False if the check fails, True if the process of initiating an ACL connection
+     * to the remote device was started or cached UUIDs will be broadcast.
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean fetchUuidsWithSdp() {
+        return fetchUuidsWithSdp(TRANSPORT_AUTO);
+    }
+
+    /**
+     * Perform a service discovery on the remote device to get the UUIDs supported with the
+     * specific transport.
+     *
+     * <p>This API is asynchronous and {@link #ACTION_UUID} intent is sent,
+     * with the UUIDs supported by the remote end. If there is an error
+     * in getting the SDP or GATT records or if the process takes a long time, or the device
+     * is bonding and we have its UUIDs cached, {@link #ACTION_UUID} intent is sent with the
+     * UUIDs that is currently present in the cache. Clients should use the {@link #getUuids}
+     * to get UUIDs if service discovery is not to be performed. If there is an ongoing bonding
+     * process, service discovery or device inquiry, the request will be queued.
+     *
+     * @param transport - provide type of transport (e.g. LE or Classic).
+     * @return False if the check fails, True if the process of initiating an ACL connection
+     * to the remote device was started or cached UUIDs will be broadcast with the specific
+     * transport.
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean fetchUuidsWithSdp(@Transport int transport) {
+        final IBluetooth service = sService;
+        if (service == null || !isBluetoothEnabled()) {
+            Log.e(TAG, "BT not enabled. Cannot fetchUuidsWithSdp");
+            return false;
+        }
+        try {
+            return service.fetchRemoteUuidsWithAttribution(this, transport, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Perform a service discovery on the remote device to get the SDP records associated
+     * with the specified UUID.
+     *
+     * <p>This API is asynchronous and {@link #ACTION_SDP_RECORD} intent is sent,
+     * with the SDP records found on the remote end. If there is an error
+     * in getting the SDP records or if the process takes a long time,
+     * {@link #ACTION_SDP_RECORD} intent is sent with an status value in
+     * {@link #EXTRA_SDP_SEARCH_STATUS} different from 0.
+     * Detailed status error codes can be found by members of the Bluetooth package in
+     * the AbstractionLayer class.
+     * <p>The SDP record data will be stored in the intent as {@link #EXTRA_SDP_RECORD}.
+     * The object type will match one of the SdpXxxRecord types, depending on the UUID searched
+     * for.
+     *
+     * @return False if the check fails, True if the process
+     *               of initiating an ACL connection to the remote device
+     *               was started.
+     */
+    /** @hide */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean sdpSearch(ParcelUuid uuid) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot query remote device sdp records");
+            return false;
+        }
+        try {
+            return service.sdpSearch(this, uuid, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Returns whether if the device is TWS+ device.
+     *
+     * @return True if the devcie is TWS+ device.
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean isTwsPlusDevice() {
+         if (sService == null) {
+             Log.e(TAG, "BT not enabled. Cannot query remote device sdp records");
+             return false;
+         }
+         try {
+             return sService.isTwsPlusDevice(this, mAttributionSource);
+         } catch (RemoteException e) {Log.e(TAG, "", e);}
+         return false;
+    }
+
+    /**
+     * Get the TWS+ peer address of the remote device.
+     *
+     * @return the TWS+ peer address of the remote device if available, otherwise
+     * null.
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public String getTwsPlusPeerAddress() {
+        if (sService == null) {
+            Log.e(TAG, "BT not enabled. Cannot get Remote Device name");
+            return null;
+        }
+        try {
+            return sService.getTwsPlusPeerAddress(this, mAttributionSource);
+        } catch (RemoteException e) {Log.e(TAG, "", e);}
+        return null;
+    }
+
+    /**
+     * Set the pin during pairing when the pairing method is {@link #PAIRING_VARIANT_PIN}
+     *
+     * @return true pin has been set false for error
+     */
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean setPin(byte[] pin) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot set Remote Device pin");
+            return false;
+        }
+        try {
+            return service.setPin(this, true, pin.length, pin, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Set the pin during pairing when the pairing method is {@link #PAIRING_VARIANT_PIN}
+     *
+     * @return true pin has been set false for error
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean setPin(@NonNull String pin) {
+        byte[] pinBytes = convertPinToBytes(pin);
+        if (pinBytes == null) {
+            return false;
+        }
+        return setPin(pinBytes);
+    }
+
+    /**
+     * Confirm passkey for {@link #PAIRING_VARIANT_PASSKEY_CONFIRMATION} pairing.
+     *
+     * @return true confirmation has been sent out false for error
+     */
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setPairingConfirmation(boolean confirm) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot set pairing confirmation");
+            return false;
+        }
+        try {
+            return service.setPairingConfirmation(this, confirm, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Cancels pairing to this device
+     *
+     * @return true if pairing cancelled successfully, false otherwise
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public boolean cancelPairing() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "BT not enabled. Cannot cancel pairing");
+            return false;
+        }
+        try {
+            return service.cancelBondProcess(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    boolean isBluetoothEnabled() {
+        boolean ret = false;
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+        if (adapter != null && adapter.isEnabled()) {
+            ret = true;
+        }
+        return ret;
+    }
+
+    /**
+     * Gets whether the phonebook access is allowed for this bluetooth device
+     *
+     * @return Whether the phonebook access is allowed to this device. Can be {@link
+     * #ACCESS_UNKNOWN}, {@link #ACCESS_ALLOWED} or {@link #ACCESS_REJECTED}.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @AccessPermission int getPhonebookAccessPermission() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            return ACCESS_UNKNOWN;
+        }
+        try {
+            return service.getPhonebookAccessPermission(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return ACCESS_UNKNOWN;
+    }
+
+    /**
+     * Sets whether the {@link BluetoothDevice} enters silence mode. Audio will not
+     * be routed to the {@link BluetoothDevice} if set to {@code true}.
+     *
+     * When the {@link BluetoothDevice} enters silence mode, and the {@link BluetoothDevice}
+     * is an active device (for A2DP or HFP), the active device for that profile
+     * will be set to null.
+     * If the {@link BluetoothDevice} exits silence mode while the A2DP or HFP
+     * active device is null, the {@link BluetoothDevice} will be set as the
+     * active device for that profile.
+     * If the {@link BluetoothDevice} is disconnected, it exits silence mode.
+     * If the {@link BluetoothDevice} is set as the active device for A2DP or
+     * HFP, while silence mode is enabled, then the device will exit silence mode.
+     * If the {@link BluetoothDevice} is in silence mode, AVRCP position change
+     * event and HFP AG indicators will be disabled.
+     * If the {@link BluetoothDevice} is not connected with A2DP or HFP, it cannot
+     * enter silence mode.
+     *
+     * @param silence true to enter silence mode, false to exit
+     * @return true on success, false on error.
+     * @throws IllegalStateException if Bluetooth is not turned ON.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setSilenceMode(boolean silence) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            throw new IllegalStateException("Bluetooth is not turned ON");
+        }
+        try {
+            return service.setSilenceMode(this, silence, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "setSilenceMode fail", e);
+            return false;
+        }
+    }
+
+    /**
+     * Check whether the {@link BluetoothDevice} is in silence mode
+     *
+     * @return true on device in silence mode, otherwise false.
+     * @throws IllegalStateException if Bluetooth is not turned ON.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean isInSilenceMode() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            throw new IllegalStateException("Bluetooth is not turned ON");
+        }
+        try {
+            return service.getSilenceMode(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "isInSilenceMode fail", e);
+            return false;
+        }
+    }
+
+    /**
+     * Sets whether the phonebook access is allowed to this device.
+     *
+     * @param value Can be {@link #ACCESS_UNKNOWN}, {@link #ACCESS_ALLOWED} or {@link
+     * #ACCESS_REJECTED}.
+     * @return Whether the value has been successfully set.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setPhonebookAccessPermission(@AccessPermission int value) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            return false;
+        }
+        try {
+            return service.setPhonebookAccessPermission(this, value, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Gets whether message access is allowed to this bluetooth device
+     *
+     * @return Whether the message access is allowed to this device.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @AccessPermission int getMessageAccessPermission() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            return ACCESS_UNKNOWN;
+        }
+        try {
+            return service.getMessageAccessPermission(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return ACCESS_UNKNOWN;
+    }
+
+    /**
+     * Sets whether the message access is allowed to this device.
+     *
+     * @param value Can be {@link #ACCESS_UNKNOWN} if the device is unbonded,
+     * {@link #ACCESS_ALLOWED} if the permission is being granted, or {@link #ACCESS_REJECTED} if
+     * the permission is not being granted.
+     * @return Whether the value has been successfully set.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setMessageAccessPermission(@AccessPermission int value) {
+        // Validates param value is one of the accepted constants
+        if (value != ACCESS_ALLOWED && value != ACCESS_REJECTED && value != ACCESS_UNKNOWN) {
+            throw new IllegalArgumentException(value + "is not a valid AccessPermission value");
+        }
+        final IBluetooth service = sService;
+        if (service == null) {
+            return false;
+        }
+        try {
+            return service.setMessageAccessPermission(this, value, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Gets whether sim access is allowed for this bluetooth device
+     *
+     * @return Whether the Sim access is allowed to this device.
+     * @hide
+     */
+    @SystemApi
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public @AccessPermission int getSimAccessPermission() {
+        final IBluetooth service = sService;
+        if (service == null) {
+            return ACCESS_UNKNOWN;
+        }
+        try {
+            return service.getSimAccessPermission(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return ACCESS_UNKNOWN;
+    }
+
+    /**
+     * Sets whether the Sim access is allowed to this device.
+     *
+     * @param value Can be {@link #ACCESS_UNKNOWN} if the device is unbonded,
+     * {@link #ACCESS_ALLOWED} if the permission is being granted, or {@link #ACCESS_REJECTED} if
+     * the permission is not being granted.
+     * @return Whether the value has been successfully set.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setSimAccessPermission(int value) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            return false;
+        }
+        try {
+            return service.setSimAccessPermission(this, value, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return false;
+    }
+
+    /**
+     * Create an RFCOMM {@link BluetoothSocket} ready to start a secure
+     * outgoing connection to this remote device on given channel.
+     * <p>The remote device will be authenticated and communication on this
+     * socket will be encrypted.
+     * <p> Use this socket only if an authenticated socket link is possible.
+     * Authentication refers to the authentication of the link key to
+     * prevent person-in-the-middle type of attacks.
+     * For example, for Bluetooth 2.1 devices, if any of the devices does not
+     * have an input and output capability or just has the ability to
+     * display a numeric key, a secure socket connection is not possible.
+     * In such a case, use {@link createInsecureRfcommSocket}.
+     * For more details, refer to the Security Model section 5.2 (vol 3) of
+     * Bluetooth Core Specification version 2.1 + EDR.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing
+     * connection.
+     * <p>Valid RFCOMM channels are in range 1 to 30.
+     *
+     * @param channel RFCOMM channel to connect to
+     * @return a RFCOMM BluetoothServerSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createRfcommSocket(int channel) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "Bluetooth is not enabled");
+            throw new IOException();
+        }
+        return new BluetoothSocket(BluetoothSocket.TYPE_RFCOMM, -1, true, true, this, channel,
+                null);
+    }
+
+    /**
+     * Create an L2cap {@link BluetoothSocket} ready to start a secure
+     * outgoing connection to this remote device on given channel.
+     * <p>The remote device will be authenticated and communication on this
+     * socket will be encrypted.
+     * <p> Use this socket only if an authenticated socket link is possible.
+     * Authentication refers to the authentication of the link key to
+     * prevent person-in-the-middle type of attacks.
+     * For example, for Bluetooth 2.1 devices, if any of the devices does not
+     * have an input and output capability or just has the ability to
+     * display a numeric key, a secure socket connection is not possible.
+     * In such a case, use {@link createInsecureRfcommSocket}.
+     * For more details, refer to the Security Model section 5.2 (vol 3) of
+     * Bluetooth Core Specification version 2.1 + EDR.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing
+     * connection.
+     * <p>Valid L2CAP PSM channels are in range 1 to 2^16.
+     *
+     * @param channel L2cap PSM/channel to connect to
+     * @return a RFCOMM BluetoothServerSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createL2capSocket(int channel) throws IOException {
+        return new BluetoothSocket(BluetoothSocket.TYPE_L2CAP, -1, true, true, this, channel,
+                null);
+    }
+
+    /**
+     * Create an L2cap {@link BluetoothSocket} ready to start an insecure
+     * outgoing connection to this remote device on given channel.
+     * <p>The remote device will be not authenticated and communication on this
+     * socket will not be encrypted.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing
+     * connection.
+     * <p>Valid L2CAP PSM channels are in range 1 to 2^16.
+     *
+     * @param channel L2cap PSM/channel to connect to
+     * @return a RFCOMM BluetoothServerSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     * @hide
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createInsecureL2capSocket(int channel) throws IOException {
+        return new BluetoothSocket(BluetoothSocket.TYPE_L2CAP, -1, false, false, this, channel,
+                null);
+    }
+
+    /**
+     * Create an RFCOMM {@link BluetoothSocket} ready to start a secure
+     * outgoing connection to this remote device using SDP lookup of uuid.
+     * <p>This is designed to be used with {@link
+     * BluetoothAdapter#listenUsingRfcommWithServiceRecord} for peer-peer
+     * Bluetooth applications.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing
+     * connection. This will also perform an SDP lookup of the given uuid to
+     * determine which channel to connect to.
+     * <p>The remote device will be authenticated and communication on this
+     * socket will be encrypted.
+     * <p> Use this socket only if an authenticated socket link is possible.
+     * Authentication refers to the authentication of the link key to
+     * prevent person-in-the-middle type of attacks.
+     * For example, for Bluetooth 2.1 devices, if any of the devices does not
+     * have an input and output capability or just has the ability to
+     * display a numeric key, a secure socket connection is not possible.
+     * In such a case, use {@link #createInsecureRfcommSocketToServiceRecord}.
+     * For more details, refer to the Security Model section 5.2 (vol 3) of
+     * Bluetooth Core Specification version 2.1 + EDR.
+     * <p>Hint: If you are connecting to a Bluetooth serial board then try
+     * using the well-known SPP UUID 00001101-0000-1000-8000-00805F9B34FB.
+     * However if you are connecting to an Android peer then please generate
+     * your own unique UUID.
+     *
+     * @param uuid service record uuid to lookup RFCOMM channel
+     * @return a RFCOMM BluetoothServerSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createRfcommSocketToServiceRecord(UUID uuid) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "Bluetooth is not enabled");
+            throw new IOException();
+        }
+
+        return new BluetoothSocket(BluetoothSocket.TYPE_RFCOMM, -1, true, true, this, -1,
+                new ParcelUuid(uuid));
+    }
+
+    /**
+     * Create an RFCOMM {@link BluetoothSocket} socket ready to start an insecure
+     * outgoing connection to this remote device using SDP lookup of uuid.
+     * <p> The communication channel will not have an authenticated link key
+     * i.e it will be subject to person-in-the-middle attacks. For Bluetooth 2.1
+     * devices, the link key will be encrypted, as encryption is mandatory.
+     * For legacy devices (pre Bluetooth 2.1 devices) the link key will
+     * be not be encrypted. Use {@link #createRfcommSocketToServiceRecord} if an
+     * encrypted and authenticated communication channel is desired.
+     * <p>This is designed to be used with {@link
+     * BluetoothAdapter#listenUsingInsecureRfcommWithServiceRecord} for peer-peer
+     * Bluetooth applications.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing
+     * connection. This will also perform an SDP lookup of the given uuid to
+     * determine which channel to connect to.
+     * <p>The remote device will be authenticated and communication on this
+     * socket will be encrypted.
+     * <p>Hint: If you are connecting to a Bluetooth serial board then try
+     * using the well-known SPP UUID 00001101-0000-1000-8000-00805F9B34FB.
+     * However if you are connecting to an Android peer then please generate
+     * your own unique UUID.
+     *
+     * @param uuid service record uuid to lookup RFCOMM channel
+     * @return a RFCOMM BluetoothServerSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createInsecureRfcommSocketToServiceRecord(UUID uuid) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "Bluetooth is not enabled");
+            throw new IOException();
+        }
+        return new BluetoothSocket(BluetoothSocket.TYPE_RFCOMM, -1, false, false, this, -1,
+                new ParcelUuid(uuid));
+    }
+
+    /**
+     * Construct an insecure RFCOMM socket ready to start an outgoing
+     * connection.
+     * Call #connect on the returned #BluetoothSocket to begin the connection.
+     * The remote device will not be authenticated and communication on this
+     * socket will not be encrypted.
+     *
+     * @param port remote port
+     * @return An RFCOMM BluetoothSocket
+     * @throws IOException On error, for example Bluetooth not available, or insufficient
+     * permissions.
+     * @hide
+     */
+    @UnsupportedAppUsage(publicAlternatives = "Use "
+            + "{@link #createInsecureRfcommSocketToServiceRecord} instead.")
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createInsecureRfcommSocket(int port) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "Bluetooth is not enabled");
+            throw new IOException();
+        }
+        return new BluetoothSocket(BluetoothSocket.TYPE_RFCOMM, -1, false, false, this, port,
+                null);
+    }
+
+    /**
+     * Construct a SCO socket ready to start an outgoing connection.
+     * Call #connect on the returned #BluetoothSocket to begin the connection.
+     *
+     * @return a SCO BluetoothSocket
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    @RequiresLegacyBluetoothAdminPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public BluetoothSocket createScoSocket() throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "Bluetooth is not enabled");
+            throw new IOException();
+        }
+        return new BluetoothSocket(BluetoothSocket.TYPE_SCO, -1, true, true, this, -1, null);
+    }
+
+    /**
+     * Check that a pin is valid and convert to byte array.
+     *
+     * Bluetooth pin's are 1 to 16 bytes of UTF-8 characters.
+     *
+     * @param pin pin as java String
+     * @return the pin code as a UTF-8 byte array, or null if it is an invalid Bluetooth pin.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static byte[] convertPinToBytes(String pin) {
+        if (pin == null) {
+            return null;
+        }
+        byte[] pinBytes;
+        try {
+            pinBytes = pin.getBytes("UTF-8");
+        } catch (UnsupportedEncodingException uee) {
+            Log.e(TAG, "UTF-8 not supported?!?");  // this should not happen
+            return null;
+        }
+        if (pinBytes.length <= 0 || pinBytes.length > 16) {
+            return null;
+        }
+        return pinBytes;
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @throws IllegalArgumentException if callback is null
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback) {
+        return (connectGatt(context, autoConnect, callback, TRANSPORT_AUTO));
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @param transport preferred transport for GATT connections to remote dual-mode devices {@link
+     * BluetoothDevice#TRANSPORT_AUTO} or {@link BluetoothDevice#TRANSPORT_BREDR} or {@link
+     * BluetoothDevice#TRANSPORT_LE}
+     * @throws IllegalArgumentException if callback is null
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport) {
+        return (connectGatt(context, autoConnect, callback, transport, PHY_LE_1M_MASK));
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @param transport preferred transport for GATT connections to remote dual-mode devices {@link
+     * BluetoothDevice#TRANSPORT_AUTO} or {@link BluetoothDevice#TRANSPORT_BREDR} or {@link
+     * BluetoothDevice#TRANSPORT_LE}
+     * @param phy preferred PHY for connections to remote LE device. Bitwise OR of any of {@link
+     * BluetoothDevice#PHY_LE_1M_MASK}, {@link BluetoothDevice#PHY_LE_2M_MASK}, and {@link
+     * BluetoothDevice#PHY_LE_CODED_MASK}. This option does not take effect if {@code autoConnect}
+     * is set to true.
+     * @throws NullPointerException if callback is null
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport, int phy) {
+        return connectGatt(context, autoConnect, callback, transport, phy, null);
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @param transport preferred transport for GATT connections to remote dual-mode devices {@link
+     * BluetoothDevice#TRANSPORT_AUTO} or {@link BluetoothDevice#TRANSPORT_BREDR} or {@link
+     * BluetoothDevice#TRANSPORT_LE}
+     * @param phy preferred PHY for connections to remote LE device. Bitwise OR of any of {@link
+     * BluetoothDevice#PHY_LE_1M_MASK}, {@link BluetoothDevice#PHY_LE_2M_MASK}, an d{@link
+     * BluetoothDevice#PHY_LE_CODED_MASK}. This option does not take effect if {@code autoConnect}
+     * is set to true.
+     * @param handler The handler to use for the callback. If {@code null}, callbacks will happen on
+     * an un-specified background thread.
+     * @throws NullPointerException if callback is null
+     */
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport, int phy,
+            Handler handler) {
+        return connectGatt(context, autoConnect, callback, transport, false, phy, handler);
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @param transport preferred transport for GATT connections to remote dual-mode devices {@link
+     * BluetoothDevice#TRANSPORT_AUTO} or {@link BluetoothDevice#TRANSPORT_BREDR} or {@link
+     * BluetoothDevice#TRANSPORT_LE}
+     * @param opportunistic Whether this GATT client is opportunistic. An opportunistic GATT client
+     * does not hold a GATT connection. It automatically disconnects when no other GATT connections
+     * are active for the remote device.
+     * @param phy preferred PHY for connections to remote LE device. Bitwise OR of any of {@link
+     * BluetoothDevice#PHY_LE_1M_MASK}, {@link BluetoothDevice#PHY_LE_2M_MASK}, an d{@link
+     * BluetoothDevice#PHY_LE_CODED_MASK}. This option does not take effect if {@code autoConnect}
+     * is set to true.
+     * @param handler The handler to use for the callback. If {@code null}, callbacks will happen on
+     * an un-specified background thread.
+     * @return A BluetoothGatt instance. You can use BluetoothGatt to conduct GATT client
+     * operations.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport,
+            boolean opportunistic, int phy, Handler handler) {
+        return connectGatt(context, autoConnect, callback, transport, opportunistic,
+                phy, handler, false);
+    }
+
+    /**
+     * Connect to GATT Server hosted by this device. Caller acts as GATT client.
+     * The callback is used to deliver results to Caller, such as connection status as well
+     * as any further GATT client operations.
+     * The method returns a BluetoothGatt instance. You can use BluetoothGatt to conduct
+     * GATT client operations.
+     *
+     * @param callback GATT callback handler that will receive asynchronous callbacks.
+     * @param autoConnect Whether to directly connect to the remote device (false) or to
+     * automatically connect as soon as the remote device becomes available (true).
+     * @param transport preferred transport for GATT connections to remote dual-mode devices {@link
+     * BluetoothDevice#TRANSPORT_AUTO} or {@link BluetoothDevice#TRANSPORT_BREDR} or {@link
+     * BluetoothDevice#TRANSPORT_LE}
+     * @param opportunistic Whether this GATT client is opportunistic. An opportunistic GATT client
+     * does not hold a GATT connection. It automatically disconnects when no other GATT connections
+     * are active for the remote device.
+     * @param phy preferred PHY for connections to remote LE device. Bitwise OR of any of {@link
+     * BluetoothDevice#PHY_LE_1M_MASK}, {@link BluetoothDevice#PHY_LE_2M_MASK}, an d{@link
+     * BluetoothDevice#PHY_LE_CODED_MASK}. This option does not take effect if {@code autoConnect}
+     * is set to true.
+     * @param handler The handler to use for the callback. If {@code null}, callbacks will happen on
+     * an un-specified background thread.
+     * @param eattSupport specifies whether client app needs EATT channel for client operations.
+     * If both local and remote devices support EATT and local app asks for EATT, GATT client
+     * operations will be performed using EATT channel.
+     * If either local or remote device doesn't support EATT but local App asks for EATT, GATT
+     * client operations will be performed using unenhanced ATT channel.
+     *
+     * @return A BluetoothGatt instance. You can use BluetoothGatt to conduct GATT client
+     * operations.
+     *
+     * @throws NullPointerException if callback is null
+     *
+     * @hide
+     */
+    public BluetoothGatt connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport, boolean opportunistic,
+            int phy, Handler handler, boolean eattSupport) {
+        if (callback == null) {
+            throw new NullPointerException("callback is null");
+        }
+
+        // TODO(Bluetooth) check whether platform support BLE
+        //     Do the check here or in GattServer?
+        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+        IBluetoothManager managerService = adapter.getBluetoothManager();
+        try {
+            IBluetoothGatt iGatt = managerService.getBluetoothGatt();
+            if (iGatt == null) {
+                // BLE is not supported
+                return null;
+            }
+            BluetoothGatt gatt = new BluetoothGatt(
+                    iGatt, this, transport, opportunistic, phy, mAttributionSource);
+            gatt.connect(autoConnect, callback, handler, eattSupport);
+            return gatt;
+        } catch (RemoteException e) {
+            Log.e(TAG, "", e);
+        }
+        return null;
+    }
+
+    /**
+     * Create a Bluetooth L2CAP Connection-oriented Channel (CoC) {@link BluetoothSocket} that can
+     * be used to start a secure outgoing connection to the remote device with the same dynamic
+     * protocol/service multiplexer (PSM) value. The supported Bluetooth transport is LE only.
+     * <p>This is designed to be used with {@link BluetoothAdapter#listenUsingL2capChannel()} for
+     * peer-peer Bluetooth applications.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing connection.
+     * <p>Application using this API is responsible for obtaining PSM value from remote device.
+     * <p>The remote device will be authenticated and communication on this socket will be
+     * encrypted.
+     * <p> Use this socket if an authenticated socket link is possible. Authentication refers
+     * to the authentication of the link key to prevent person-in-the-middle type of attacks.
+     *
+     * @param psm dynamic PSM value from remote device
+     * @return a CoC #BluetoothSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public @NonNull BluetoothSocket createL2capChannel(int psm) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "createL2capChannel: Bluetooth is not enabled");
+            throw new IOException();
+        }
+        if (DBG) Log.d(TAG, "createL2capChannel: psm=" + psm);
+        return new BluetoothSocket(BluetoothSocket.TYPE_L2CAP_LE, -1, true, true, this, psm,
+                null);
+    }
+
+    /**
+     * Create a Bluetooth L2CAP Connection-oriented Channel (CoC) {@link BluetoothSocket} that can
+     * be used to start a secure outgoing connection to the remote device with the same dynamic
+     * protocol/service multiplexer (PSM) value. The supported Bluetooth transport is LE only.
+     * <p>This is designed to be used with {@link
+     * BluetoothAdapter#listenUsingInsecureL2capChannel()} for peer-peer Bluetooth applications.
+     * <p>Use {@link BluetoothSocket#connect} to initiate the outgoing connection.
+     * <p>Application using this API is responsible for obtaining PSM value from remote device.
+     * <p> The communication channel may not have an authenticated link key, i.e. it may be subject
+     * to person-in-the-middle attacks. Use {@link #createL2capChannel(int)} if an encrypted and
+     * authenticated communication channel is possible.
+     *
+     * @param psm dynamic PSM value from remote device
+     * @return a CoC #BluetoothSocket ready for an outgoing connection
+     * @throws IOException on error, for example Bluetooth not available, or insufficient
+     * permissions
+     */
+    @RequiresLegacyBluetoothPermission
+    @RequiresBluetoothConnectPermission
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT)
+    @SuppressLint("AndroidFrameworkRequiresPermission")
+    public @NonNull BluetoothSocket createInsecureL2capChannel(int psm) throws IOException {
+        if (!isBluetoothEnabled()) {
+            Log.e(TAG, "createInsecureL2capChannel: Bluetooth is not enabled");
+            throw new IOException();
+        }
+        if (DBG) {
+            Log.d(TAG, "createInsecureL2capChannel: psm=" + psm);
+        }
+        return new BluetoothSocket(BluetoothSocket.TYPE_L2CAP_LE, -1, false, false, this, psm,
+                null);
+    }
+
+    /**
+     * Set a keyed metadata of this {@link BluetoothDevice} to a
+     * {@link String} value.
+     * Only bonded devices's metadata will be persisted across Bluetooth
+     * restart.
+     * Metadata will be removed when the device's bond state is moved to
+     * {@link #BOND_NONE}.
+     *
+     * @param key must be within the list of BluetoothDevice.METADATA_*
+     * @param value a byte array data to set for key. Must be less than
+     * {@link BluetoothAdapter#METADATA_MAX_LENGTH} characters in length
+     * @return true on success, false on error
+     * @hide
+    */
+    @SystemApi
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public boolean setMetadata(@MetadataKey int key, @NonNull byte[] value) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "Bluetooth is not enabled. Cannot set metadata");
+            return false;
+        }
+        if (value.length > METADATA_MAX_LENGTH) {
+            throw new IllegalArgumentException("value length is " + value.length
+                    + ", should not over " + METADATA_MAX_LENGTH);
+        }
+        try {
+            return service.setMetadata(this, key, value, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "setMetadata fail", e);
+            return false;
+        }
+    }
+
+    /**
+     * Get a keyed metadata for this {@link BluetoothDevice} as {@link String}
+     *
+     * @param key must be within the list of BluetoothDevice.METADATA_*
+     * @return Metadata of the key as byte array, null on error or not found
+     * @hide
+     */
+    @SystemApi
+    @Nullable
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public byte[] getMetadata(@MetadataKey int key) {
+        final IBluetooth service = sService;
+        if (service == null) {
+            Log.e(TAG, "Bluetooth is not enabled. Cannot get metadata");
+            return null;
+        }
+        try {
+            return service.getMetadata(this, key, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "getMetadata fail", e);
+            return null;
+        }
+    }
+
+    /**
+     * Get the maxinum metadata key ID.
+     *
+     * @return the last supported metadata key
+     * @hide
+     */
+    public static @MetadataKey int getMaxMetadataKey() {
+        return METADATA_UNTETHERED_CASE_LOW_BATTERY_THRESHOLD;
+    }
+
+    /**
+     * Returns Device type.
+     *
+     * @return device type.
+     * @hide
+     */
+    @RequiresPermission(allOf = {
+            android.Manifest.permission.BLUETOOTH_CONNECT,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+    })
+    public int getDeviceType() {
+        if (sService == null) {
+            Log.e(TAG, "getDeviceType query remote device info failed");
+            return -1;
+        }
+        try {
+            return sService.getDeviceType(this, mAttributionSource);
+        } catch (RemoteException e) {
+            Log.e(TAG, "getDeviceType fail ", e);
+        }
+        return -1;
+    }
+
+    /**
+     * Used as a String extra field in {@link #ACTION_BOND_STATE_CHANGED} intents.
+     * It contains the Group ID of IOT device.
+     * @hide
+     */
+    public static final String EXTRA_GROUP_ID = "android.bluetooth.qti.extra.GROUP_ID";
+
+    /**
+     * Used as a String extra field in {@link #ACTION_BOND_STATE_CHANGED} intents.
+     * It contains the IGNORE DEVICE flag of IOT device.
+     * @hide
+     */
+    public static final String EXTRA_IS_PRIVATE_ADDRESS =
+            "android.bluetooth.qti.extra.IS_PRIVATE_ADDRESS";
+}