/* * Copyright (C) 2014 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.IntRange; 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.bluetooth.annotations.RequiresBluetoothConnectPermission; import android.bluetooth.annotations.RequiresLegacyBluetoothPermission; import android.compat.annotation.UnsupportedAppUsage; import android.content.AttributionSource; import android.content.Context; import android.os.Build; import android.os.Bundle; import android.os.IBinder; import android.os.Parcel; import android.os.Parcelable; import android.os.RemoteException; import android.util.CloseGuard; import android.util.Log; import java.util.Collections; import java.util.List; /** * This class provides the System APIs to interact with the Hands-Free Client profile. * *

BluetoothHeadsetClient is a proxy object for controlling the Bluetooth HFP Client Service via * IPC. Use {@link BluetoothAdapter#getProfileProxy} to get the BluetoothHeadsetClient proxy object. * * @hide */ @SystemApi public final class BluetoothHeadsetClient implements BluetoothProfile, AutoCloseable { private static final String TAG = "BluetoothHeadsetClient"; private static final boolean DBG = true; private static final boolean VDBG = false; private final CloseGuard mCloseGuard; /** * Intent used to broadcast the change in connection state of the HFP Client profile. * *

This intent will have 3 extras: * *

* *

{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of {@link * #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, {@link #STATE_CONNECTED}, {@link * #STATE_DISCONNECTING}. * * @hide */ @SuppressLint("ActionValue") @SystemApi @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_CONNECTION_STATE_CHANGED = "android.bluetooth.headsetclient.profile.action.CONNECTION_STATE_CHANGED"; /** * Intent sent whenever audio state changes. * *

It includes two mandatory extras: {@link BluetoothProfile#EXTRA_STATE}, {@link * BluetoothProfile#EXTRA_PREVIOUS_STATE}, with possible values: {@link * #STATE_AUDIO_CONNECTING}, {@link #STATE_AUDIO_CONNECTED}, {@link #STATE_AUDIO_DISCONNECTED} * *

When EXTRA_STATE is set to STATE_AUDIO_CONNECTED, it also * includes {@link #EXTRA_AUDIO_WBS} indicating wide band speech support. * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) @SuppressLint("ActionValue") public static final String ACTION_AUDIO_STATE_CHANGED = "android.bluetooth.headsetclient.profile.action.AUDIO_STATE_CHANGED"; /** * Intent sending updates of the Audio Gateway state. Each extra is being sent only when value * it represents has been changed recently on AG. * *

It can contain one or more of the following extras: {@link #EXTRA_NETWORK_STATUS}, {@link * #EXTRA_NETWORK_SIGNAL_STRENGTH}, {@link #EXTRA_NETWORK_ROAMING}, {@link * #EXTRA_BATTERY_LEVEL}, {@link #EXTRA_OPERATOR_NAME}, {@link #EXTRA_VOICE_RECOGNITION}, {@link * #EXTRA_IN_BAND_RING} * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_AG_EVENT = "android.bluetooth.headsetclient.profile.action.AG_EVENT"; /** * Intent sent whenever state of a call changes. * *

It includes: {@link #EXTRA_CALL}, with value of {@link BluetoothHeadsetClientCall} * instance, representing actual call state. * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_CALL_CHANGED = "android.bluetooth.headsetclient.profile.action.AG_CALL_CHANGED"; /** * Intent that notifies about the result of the last issued action. Please note that not every * action results in explicit action result code being sent. Instead other notifications about * new Audio Gateway state might be sent, like ACTION_AG_EVENT with * EXTRA_VOICE_RECOGNITION value when for example user started voice recognition from HF * unit. * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_RESULT = "android.bluetooth.headsetclient.profile.action.RESULT"; /** * Intent that notifies about vendor specific event arrival. Events not defined in HFP spec will * be matched with supported vendor event list and this intent will be broadcasted upon a match. * Supported vendor events are of format of "+eventCode" or "+eventCode=xxxx" or * "+eventCode:=xxxx". Vendor event can be a response to a vendor specific command or * unsolicited. * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_VENDOR_SPECIFIC_HEADSETCLIENT_EVENT = "android.bluetooth.headsetclient.profile.action.VENDOR_SPECIFIC_EVENT"; /** * Intent that notifies about the number attached to the last voice tag recorded on AG. * *

It contains: {@link #EXTRA_NUMBER}, with a String value representing phone * number. * * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_LAST_VTAG = "android.bluetooth.headsetclient.profile.action.LAST_VTAG"; /** @hide */ public static final int STATE_AUDIO_DISCONNECTED = 0; /** @hide */ public static final int STATE_AUDIO_CONNECTING = 1; /** @hide */ public static final int STATE_AUDIO_CONNECTED = 2; /** * Extra with information if connected audio is WBS. * *

Possible values: true, false. * * @hide */ public static final String EXTRA_AUDIO_WBS = "android.bluetooth.headsetclient.extra.AUDIO_WBS"; /** * Extra for AG_EVENT indicates network status. * *

Value: 0 - network unavailable, 1 - network available * * @hide */ public static final String EXTRA_NETWORK_STATUS = "android.bluetooth.headsetclient.extra.NETWORK_STATUS"; /** * Extra for AG_EVENT intent indicates network signal strength. * *

Value: Integer representing signal strength. * * @hide */ public static final String EXTRA_NETWORK_SIGNAL_STRENGTH = "android.bluetooth.headsetclient.extra.NETWORK_SIGNAL_STRENGTH"; /** * Extra for AG_EVENT intent indicates roaming state. * *

Value: 0 - no roaming 1 - active roaming * * @hide */ public static final String EXTRA_NETWORK_ROAMING = "android.bluetooth.headsetclient.extra.NETWORK_ROAMING"; /** * Extra for AG_EVENT intent indicates the battery level. * *

Value: Integer representing signal strength. * * @hide */ public static final String EXTRA_BATTERY_LEVEL = "android.bluetooth.headsetclient.extra.BATTERY_LEVEL"; /** * Extra for AG_EVENT intent indicates operator name. * *

Value: String representing operator name. * * @hide */ public static final String EXTRA_OPERATOR_NAME = "android.bluetooth.headsetclient.extra.OPERATOR_NAME"; /** * Extra for AG_EVENT intent indicates voice recognition state. * *

Value: 0 - voice recognition stopped, 1 - voice recognition started. * * @hide */ public static final String EXTRA_VOICE_RECOGNITION = "android.bluetooth.headsetclient.extra.VOICE_RECOGNITION"; /** * Extra for AG_EVENT intent indicates in band ring state. * *

Value: 0 - in band ring tone not supported, or 1 - in band ring tone supported. * * @hide */ public static final String EXTRA_IN_BAND_RING = "android.bluetooth.headsetclient.extra.IN_BAND_RING"; /** * Extra for AG_EVENT intent indicates subscriber info. * *

Value: String containing subscriber information. * * @hide */ public static final String EXTRA_SUBSCRIBER_INFO = "android.bluetooth.headsetclient.extra.SUBSCRIBER_INFO"; /** * Extra for AG_CALL_CHANGED intent indicates the {@link BluetoothHeadsetClientCall} object that * has changed. * * @hide */ public static final String EXTRA_CALL = "android.bluetooth.headsetclient.extra.CALL"; /** * Extra for ACTION_LAST_VTAG intent. * *

Value: String representing phone number corresponding to last voice tag * recorded on AG * * @hide */ public static final String EXTRA_NUMBER = "android.bluetooth.headsetclient.extra.NUMBER"; /** * Extra for ACTION_RESULT intent that shows the result code of last issued action. * *

Possible results: {@link #ACTION_RESULT_OK}, {@link #ACTION_RESULT_ERROR}, {@link * #ACTION_RESULT_ERROR_NO_CARRIER}, {@link #ACTION_RESULT_ERROR_BUSY}, {@link * #ACTION_RESULT_ERROR_NO_ANSWER}, {@link #ACTION_RESULT_ERROR_DELAYED}, {@link * #ACTION_RESULT_ERROR_BLACKLISTED}, {@link #ACTION_RESULT_ERROR_CME} * * @hide */ public static final String EXTRA_RESULT_CODE = "android.bluetooth.headsetclient.extra.RESULT_CODE"; /** * Extra for ACTION_RESULT intent that shows the extended result code of last issued action. * *

Value: Integer - error code. * * @hide */ public static final String EXTRA_CME_CODE = "android.bluetooth.headsetclient.extra.CME_CODE"; /** * Extra for VENDOR_SPECIFIC_HEADSETCLIENT_EVENT intent that indicates vendor ID. * * @hide */ public static final String EXTRA_VENDOR_ID = "android.bluetooth.headsetclient.extra.VENDOR_ID"; /** * Extra for VENDOR_SPECIFIC_HEADSETCLIENT_EVENT intent that indicates vendor event code. * * @hide */ public static final String EXTRA_VENDOR_EVENT_CODE = "android.bluetooth.headsetclient.extra.VENDOR_EVENT_CODE"; /** * Extra for VENDOR_SPECIFIC_HEADSETCLIENT_EVENT intent that contains full vendor event * including event code and full arguments. * * @hide */ public static final String EXTRA_VENDOR_EVENT_FULL_ARGS = "android.bluetooth.headsetclient.extra.VENDOR_EVENT_FULL_ARGS"; /* Extras for AG_FEATURES, extras type is boolean */ // TODO verify if all of those are actually useful /** * AG feature: three way calling. * * @hide */ public static final String EXTRA_AG_FEATURE_3WAY_CALLING = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_3WAY_CALLING"; /** * AG feature: voice recognition. * * @hide */ public static final String EXTRA_AG_FEATURE_VOICE_RECOGNITION = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_VOICE_RECOGNITION"; /** * AG feature: fetching phone number for voice tagging procedure. * * @hide */ public static final String EXTRA_AG_FEATURE_ATTACH_NUMBER_TO_VT = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_ATTACH_NUMBER_TO_VT"; /** * AG feature: ability to reject incoming call. * * @hide */ public static final String EXTRA_AG_FEATURE_REJECT_CALL = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_REJECT_CALL"; /** * AG feature: enhanced call handling (terminate specific call, private consultation). * * @hide */ public static final String EXTRA_AG_FEATURE_ECC = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_ECC"; /** * AG feature: response and hold. * * @hide */ public static final String EXTRA_AG_FEATURE_RESPONSE_AND_HOLD = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_RESPONSE_AND_HOLD"; /** * AG call handling feature: accept held or waiting call in three way calling scenarios. * * @hide */ public static final String EXTRA_AG_FEATURE_ACCEPT_HELD_OR_WAITING_CALL = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_ACCEPT_HELD_OR_WAITING_CALL"; /** * AG call handling feature: release held or waiting call in three way calling scenarios. * * @hide */ public static final String EXTRA_AG_FEATURE_RELEASE_HELD_OR_WAITING_CALL = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_RELEASE_HELD_OR_WAITING_CALL"; /** * AG call handling feature: release active call and accept held or waiting call in three way * calling scenarios. * * @hide */ public static final String EXTRA_AG_FEATURE_RELEASE_AND_ACCEPT = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_RELEASE_AND_ACCEPT"; /** * AG call handling feature: merge two calls, held and active - multi party conference mode. * * @hide */ public static final String EXTRA_AG_FEATURE_MERGE = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_MERGE"; /** * AG call handling feature: merge calls and disconnect from multi party conversation leaving * peers connected to each other. Note that this feature needs to be supported by mobile network * operator as it requires connection and billing transfer. * * @hide */ public static final String EXTRA_AG_FEATURE_MERGE_AND_DETACH = "android.bluetooth.headsetclient.extra.EXTRA_AG_FEATURE_MERGE_AND_DETACH"; /* Action result codes */ /** @hide */ public static final int ACTION_RESULT_OK = 0; /** @hide */ public static final int ACTION_RESULT_ERROR = 1; /** @hide */ public static final int ACTION_RESULT_ERROR_NO_CARRIER = 2; /** @hide */ public static final int ACTION_RESULT_ERROR_BUSY = 3; /** @hide */ public static final int ACTION_RESULT_ERROR_NO_ANSWER = 4; /** @hide */ public static final int ACTION_RESULT_ERROR_DELAYED = 5; /** @hide */ public static final int ACTION_RESULT_ERROR_BLACKLISTED = 6; /** @hide */ public static final int ACTION_RESULT_ERROR_CME = 7; /* Detailed CME error codes */ /** @hide */ public static final int CME_PHONE_FAILURE = 0; /** @hide */ public static final int CME_NO_CONNECTION_TO_PHONE = 1; /** @hide */ public static final int CME_OPERATION_NOT_ALLOWED = 3; /** @hide */ public static final int CME_OPERATION_NOT_SUPPORTED = 4; /** @hide */ public static final int CME_PHSIM_PIN_REQUIRED = 5; /** @hide */ public static final int CME_PHFSIM_PIN_REQUIRED = 6; /** @hide */ public static final int CME_PHFSIM_PUK_REQUIRED = 7; /** @hide */ public static final int CME_SIM_NOT_INSERTED = 10; /** @hide */ public static final int CME_SIM_PIN_REQUIRED = 11; /** @hide */ public static final int CME_SIM_PUK_REQUIRED = 12; /** @hide */ public static final int CME_SIM_FAILURE = 13; /** @hide */ public static final int CME_SIM_BUSY = 14; /** @hide */ public static final int CME_SIM_WRONG = 15; /** @hide */ public static final int CME_INCORRECT_PASSWORD = 16; /** @hide */ public static final int CME_SIM_PIN2_REQUIRED = 17; /** @hide */ public static final int CME_SIM_PUK2_REQUIRED = 18; /** @hide */ public static final int CME_MEMORY_FULL = 20; /** @hide */ public static final int CME_INVALID_INDEX = 21; /** @hide */ public static final int CME_NOT_FOUND = 22; /** @hide */ public static final int CME_MEMORY_FAILURE = 23; /** @hide */ public static final int CME_TEXT_STRING_TOO_LONG = 24; /** @hide */ public static final int CME_INVALID_CHARACTER_IN_TEXT_STRING = 25; /** @hide */ public static final int CME_DIAL_STRING_TOO_LONG = 26; /** @hide */ public static final int CME_INVALID_CHARACTER_IN_DIAL_STRING = 27; /** @hide */ public static final int CME_NO_NETWORK_SERVICE = 30; /** @hide */ public static final int CME_NETWORK_TIMEOUT = 31; /** @hide */ public static final int CME_EMERGENCY_SERVICE_ONLY = 32; /** @hide */ public static final int CME_NO_SIMULTANEOUS_VOIP_CS_CALLS = 33; /** @hide */ public static final int CME_NOT_SUPPORTED_FOR_VOIP = 34; /** @hide */ public static final int CME_SIP_RESPONSE_CODE = 35; /** @hide */ public static final int CME_NETWORK_PERSONALIZATION_PIN_REQUIRED = 40; /** @hide */ public static final int CME_NETWORK_PERSONALIZATION_PUK_REQUIRED = 41; /** @hide */ public static final int CME_NETWORK_SUBSET_PERSONALIZATION_PIN_REQUIRED = 42; /** @hide */ public static final int CME_NETWORK_SUBSET_PERSONALIZATION_PUK_REQUIRED = 43; /** @hide */ public static final int CME_SERVICE_PROVIDER_PERSONALIZATION_PIN_REQUIRED = 44; /** @hide */ public static final int CME_SERVICE_PROVIDER_PERSONALIZATION_PUK_REQUIRED = 45; /** @hide */ public static final int CME_CORPORATE_PERSONALIZATION_PIN_REQUIRED = 46; /** @hide */ public static final int CME_CORPORATE_PERSONALIZATION_PUK_REQUIRED = 47; /** @hide */ public static final int CME_HIDDEN_KEY_REQUIRED = 48; /** @hide */ public static final int CME_EAP_NOT_SUPPORTED = 49; /** @hide */ public static final int CME_INCORRECT_PARAMETERS = 50; /* Action policy for other calls when accepting call */ /** @hide */ public static final int CALL_ACCEPT_NONE = 0; /** @hide */ public static final int CALL_ACCEPT_HOLD = 1; /** @hide */ public static final int CALL_ACCEPT_TERMINATE = 2; private final BluetoothAdapter mAdapter; private final AttributionSource mAttributionSource; private IBluetoothHeadsetClient mService; /** Create a BluetoothHeadsetClient proxy object. */ BluetoothHeadsetClient(Context context, BluetoothAdapter adapter) { mAdapter = adapter; mAttributionSource = adapter.getAttributionSource(); mService = null; mCloseGuard = new CloseGuard(); mCloseGuard.open("close"); } /** * Close the connection to the backing service. Other public functions of BluetoothHeadsetClient * will return default error results once close() has been called. Multiple invocations of * close() are ok. * * @hide */ @Override public void close() { if (VDBG) log("close()"); mAdapter.closeProfileProxy(this); if (mCloseGuard != null) { mCloseGuard.close(); } } /** @hide */ @Override public void onServiceConnected(IBinder service) { mService = IBluetoothHeadsetClient.Stub.asInterface(service); } /** @hide */ @Override public void onServiceDisconnected() { mService = null; } private IBluetoothHeadsetClient getService() { return mService; } /** @hide */ @Override public BluetoothAdapter getAdapter() { return mAdapter; } /** @hide */ @SuppressWarnings("Finalize") // TODO(b/314811467) protected void finalize() { if (mCloseGuard != null) { mCloseGuard.warnIfOpen(); } close(); } /** * Connects to remote device. * *

Currently, the system supports only 1 connection. So, in case of the second connection, * this implementation will disconnect already connected device automatically and will process * the new one. * * @param device a remote device we want connect to * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CONNECTION_STATE_CHANGED} intent. * @hide */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean connect(BluetoothDevice device) { if (DBG) log("connect(" + device + ")"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.connect(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Disconnects remote device * * @param device a remote device we want disconnect * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CONNECTION_STATE_CHANGED} intent. * @hide */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean disconnect(BluetoothDevice device) { if (DBG) log("disconnect(" + device + ")"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.disconnect(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * {@inheritDoc} * * @hide */ @SystemApi @Override @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) public @NonNull List getConnectedDevices() { if (VDBG) log("getConnectedDevices()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return Attributable.setAttributionSource( service.getConnectedDevices(mAttributionSource), mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); throw e.rethrowAsRuntimeException(); } } return Collections.emptyList(); } /** * {@inheritDoc} * * @hide */ @SystemApi @Override @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) @NonNull public List getDevicesMatchingConnectionStates(@NonNull int[] states) { if (VDBG) log("getDevicesMatchingStates()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return Attributable.setAttributionSource( service.getDevicesMatchingConnectionStates(states, mAttributionSource), mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); throw e.rethrowAsRuntimeException(); } } return Collections.emptyList(); } /** * {@inheritDoc} * * @hide */ @SystemApi @Override @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) public @BtProfileState int getConnectionState(@NonNull BluetoothDevice device) { if (VDBG) log("getConnectionState(" + device + ")"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.getConnectionState(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); throw e.rethrowAsRuntimeException(); } } return BluetoothProfile.STATE_DISCONNECTED; } /** * Set priority of the profile * *

The device should already be paired. Priority can be one of {@link #PRIORITY_ON} or {@link * #PRIORITY_OFF} * * @param device Paired bluetooth device * @return true if priority is set, false on error * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean setPriority(BluetoothDevice device, int priority) { if (DBG) log("setPriority(" + device + ", " + priority + ")"); return setConnectionPolicy(device, BluetoothAdapter.priorityToConnectionPolicy(priority)); } /** * Set connection policy of the profile * *

The device should already be paired. Connection policy can be one of {@link * #CONNECTION_POLICY_ALLOWED}, {@link #CONNECTION_POLICY_FORBIDDEN}, {@link * #CONNECTION_POLICY_UNKNOWN} * * @param device Paired bluetooth device * @param connectionPolicy is the connection policy to set to for this profile * @return true if connectionPolicy is set, false on error * @hide */ @SystemApi @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) public boolean setConnectionPolicy( @NonNull BluetoothDevice device, @ConnectionPolicy int connectionPolicy) { if (DBG) log("setConnectionPolicy(" + device + ", " + connectionPolicy + ")"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device) && (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN || connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED)) { try { return service.setConnectionPolicy(device, connectionPolicy, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); throw e.rethrowAsRuntimeException(); } } return false; } /** * Get the priority of the profile. * *

The priority can be any of: {@link #PRIORITY_OFF}, {@link #PRIORITY_ON}, {@link * #PRIORITY_UNDEFINED} * * @param device Bluetooth device * @return priority of the device * @hide */ @RequiresLegacyBluetoothPermission @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public int getPriority(BluetoothDevice device) { if (VDBG) log("getPriority(" + device + ")"); return BluetoothAdapter.connectionPolicyToPriority(getConnectionPolicy(device)); } /** * Get the connection policy of the profile. * *

The connection policy can be any of: {@link #CONNECTION_POLICY_ALLOWED}, {@link * #CONNECTION_POLICY_FORBIDDEN}, {@link #CONNECTION_POLICY_UNKNOWN} * * @param device Bluetooth device * @return connection policy of the device * @hide */ @SystemApi @RequiresLegacyBluetoothPermission @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) public @ConnectionPolicy int getConnectionPolicy(@NonNull BluetoothDevice device) { if (VDBG) log("getConnectionPolicy(" + device + ")"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.getConnectionPolicy(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); throw e.rethrowAsRuntimeException(); } } return BluetoothProfile.CONNECTION_POLICY_FORBIDDEN; } /** * Starts voice recognition. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_AG_EVENT} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_VOICE_RECOGNITION}. This method invocation will fail silently when * feature is not supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean startVoiceRecognition(BluetoothDevice device) { if (DBG) log("startVoiceRecognition()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.startVoiceRecognition(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Send vendor specific AT command. * * @param device remote device * @param vendorId vendor number by Bluetooth SIG * @param atCommand command to be sent. It start with + prefix and only one command at one time. * @return true if command has been issued successfully; false * otherwise. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean sendVendorAtCommand(BluetoothDevice device, int vendorId, String atCommand) { if (DBG) log("sendVendorSpecificCommand()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.sendVendorAtCommand(device, vendorId, atCommand, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Stops voice recognition. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_AG_EVENT} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_VOICE_RECOGNITION}. This method invocation will fail silently when * feature is not supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean stopVoiceRecognition(BluetoothDevice device) { if (DBG) log("stopVoiceRecognition()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.stopVoiceRecognition(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Returns list of all calls in any state. * * @param device remote device * @return list of calls; empty list if none call exists * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public List getCurrentCalls(BluetoothDevice device) { if (DBG) log("getCurrentCalls()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return Attributable.setAttributionSource( service.getCurrentCalls(device, mAttributionSource), mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return null; } /** * Returns list of current values of AG indicators. * * @param device remote device * @return bundle of AG indicators; null if device is not in CONNECTED state * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public Bundle getCurrentAgEvents(BluetoothDevice device) { if (DBG) log("getCurrentAgEvents()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.getCurrentAgEvents(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return null; } /** * Accepts a call * * @param device remote device * @param flag action policy while accepting a call. Possible values {@link #CALL_ACCEPT_NONE}, * {@link #CALL_ACCEPT_HOLD}, {@link #CALL_ACCEPT_TERMINATE} * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. * @hide */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean acceptCall(BluetoothDevice device, int flag) { if (DBG) log("acceptCall()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.acceptCall(device, flag, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Holds a call. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean holdCall(BluetoothDevice device) { if (DBG) log("holdCall()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.holdCall(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Rejects a call. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_REJECT_CALL}. This method invocation will fail silently when feature is * not supported. * @hide */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean rejectCall(BluetoothDevice device) { if (DBG) log("rejectCall()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.rejectCall(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Terminates a specified call. * *

Works only when Extended Call Control is supported by Audio Gateway. * * @param device remote device * @param call Handle of call obtained in {@link #dial(BluetoothDevice, String)} or obtained via * {@link #ACTION_CALL_CHANGED}. {@code call} may be null in which case we will hangup all * active calls. * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_ECC}. This method invocation will fail silently when feature is not * supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean terminateCall(BluetoothDevice device, BluetoothHeadsetClientCall call) { if (DBG) log("terminateCall()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.terminateCall(device, call, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Enters private mode with a specified call. * *

Works only when Extended Call Control is supported by Audio Gateway. * * @param device remote device * @param index index of the call to connect in private mode * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_ECC}. This method invocation will fail silently when feature is not * supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean enterPrivateMode(BluetoothDevice device, int index) { if (DBG) log("enterPrivateMode()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.enterPrivateMode(device, index, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Performs explicit call transfer. * *

That means connect other calls and disconnect. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_CALL_CHANGED} intent. *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_MERGE_AND_DETACH}. This method invocation will fail silently when * feature is not supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean explicitCallTransfer(BluetoothDevice device) { if (DBG) log("explicitCallTransfer()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.explicitCallTransfer(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Places a call with specified number. * * @param device remote device * @param number valid phone number * @return {@link BluetoothHeadsetClientCall} call if command has been issued * successfully; {@code null} otherwise; upon completion HFP sends {@link * #ACTION_CALL_CHANGED} intent in case of success; {@link #ACTION_RESULT} is sent * otherwise; * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public BluetoothHeadsetClientCall dial(BluetoothDevice device, String number) { if (DBG) log("dial()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return Attributable.setAttributionSource( service.dial(device, number, mAttributionSource), mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return null; } /** * Sends DTMF code. * *

Possible code values : 0,1,2,3,4,5,6,7,8,9,A,B,C,D,*,# * * @param device remote device * @param code ASCII code * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_RESULT} intent; * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean sendDTMF(BluetoothDevice device, byte code) { if (DBG) log("sendDTMF()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.sendDTMF(device, code, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Get a number corresponding to last voice tag recorded on AG. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_LAST_VTAG} or {@link #ACTION_RESULT} * intent; *

Feature required for successful execution is being reported by: {@link * #EXTRA_AG_FEATURE_ATTACH_NUMBER_TO_VT}. This method invocation will fail silently when * feature is not supported. * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean getLastVoiceTagNumber(BluetoothDevice device) { if (DBG) log("getLastVoiceTagNumber()"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled() && isValidDevice(device)) { try { return service.getLastVoiceTagNumber(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Returns current audio state of Audio Gateway. * *

Note: This is an internal function and shouldn't be exposed * * @hide */ @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public int getAudioState(BluetoothDevice device) { if (VDBG) log("getAudioState"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return service.getAudioState(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return BluetoothHeadsetClient.STATE_AUDIO_DISCONNECTED; } /** * Sets whether audio routing is allowed. * * @param device remote device * @param allowed if routing is allowed to the device Note: This is an internal function and * shouldn't be exposed * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public void setAudioRouteAllowed(BluetoothDevice device, boolean allowed) { if (VDBG) log("setAudioRouteAllowed"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { service.setAudioRouteAllowed(device, allowed, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } } /** * Returns whether audio routing is allowed. * * @param device remote device * @return whether the command succeeded Note: This is an internal function and shouldn't be * exposed * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean getAudioRouteAllowed(BluetoothDevice device) { if (VDBG) log("getAudioRouteAllowed"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return service.getAudioRouteAllowed(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Initiates a connection of audio channel. * *

It setup SCO channel with remote connected Handsfree AG device. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_AUDIO_STATE_CHANGED} intent; * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean connectAudio(BluetoothDevice device) { if (VDBG) log("connectAudio"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return service.connectAudio(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Disconnects audio channel. * *

It tears down the SCO channel from remote AG device. * * @param device remote device * @return true if command has been issued successfully; false * otherwise; upon completion HFP sends {@link #ACTION_AUDIO_STATE_CHANGED} intent; * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public boolean disconnectAudio(BluetoothDevice device) { if (VDBG) log("disconnectAudio"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return service.disconnectAudio(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return false; } /** * Get Audio Gateway features * * @param device remote device * @return bundle of AG features; null if no service or AG not connected * @hide */ @RequiresBluetoothConnectPermission @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) public Bundle getCurrentAgFeatures(BluetoothDevice device) { if (VDBG) log("getCurrentAgFeatures"); final IBluetoothHeadsetClient service = getService(); if (service == null) { Log.w(TAG, "Proxy not attached to service"); if (DBG) log(Log.getStackTraceString(new Throwable())); } else if (isEnabled()) { try { return service.getCurrentAgFeatures(device, mAttributionSource); } catch (RemoteException e) { Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); } } return null; } /** * A class that contains the network service info provided by the HFP Client profile * * @hide */ @SystemApi public static final class NetworkServiceState implements Parcelable { /** The device associated with this service state */ private final BluetoothDevice mDevice; /** True if there is service available, False otherwise */ private final boolean mIsServiceAvailable; /** The name of the operator associated with the remote device's current network */ private final String mOperatorName; /** The general signal strength, from 0 to 5 */ private final int mSignalStrength; /** True if we are network roaming, False otherwise */ private final boolean mIsRoaming; /** * Create a NetworkServiceState Object * * @param device The device associated with this network signal state * @param isServiceAvailable True if there is service available, False otherwise * @param operatorName The name of the operator associated with the remote device's current * network. Use Null if the value is unknown * @param signalStrength The general signal strength * @param isRoaming True if we are network roaming, False otherwise * @hide */ public NetworkServiceState( BluetoothDevice device, boolean isServiceAvailable, String operatorName, int signalStrength, boolean isRoaming) { mDevice = device; mIsServiceAvailable = isServiceAvailable; mOperatorName = operatorName; mSignalStrength = signalStrength; mIsRoaming = isRoaming; } /** * Get the device associated with this network service state * * @return a BluetoothDevice associated with this state * @hide */ @SystemApi public @NonNull BluetoothDevice getDevice() { return mDevice; } /** * Get the network service availability state * * @return True if there is service available, False otherwise * @hide */ @SystemApi public boolean isServiceAvailable() { return mIsServiceAvailable; } /** * Get the network operator name * * @return A string representing the name of the operator the remote device is on, or null * if unknown. * @hide */ @SystemApi public @Nullable String getNetworkOperatorName() { return mOperatorName; } /** * The HFP Client defined signal strength, from 0 to 5. * *

Bluetooth HFP v1.8 specifies that the signal strength of a device can be [0, 5]. It * does not place any requirements on how a device derives those values. While they're * typically derived from signal quality/RSSI buckets, there's no way to be certain on the * exact meaning. Derivation methods can even change between wireless cellular technologies. * *

That said, you can "generally" interpret the values relative to each other as follows: * - Level 0: None/Unknown - Level 1: Very Poor - Level 2: Poor - Level 3: Fair - Level 4: * Good - Level 5: Great * * @return the HFP Client defined signal strength, range [0, 5] * @hide */ @SystemApi public @IntRange(from = 0, to = 5) int getSignalStrength() { return mSignalStrength; } /** * Get the network service roaming status * *

* @return True if we are network roaming, False otherwise * * @hide */ @SystemApi public boolean isRoaming() { return mIsRoaming; } /** {@link Parcelable.Creator} interface implementation. */ public static final @NonNull Parcelable.Creator CREATOR = new Parcelable.Creator() { public NetworkServiceState createFromParcel(Parcel in) { return new NetworkServiceState( (BluetoothDevice) in.readParcelable(null), in.readInt() == 1, in.readString(), in.readInt(), in.readInt() == 1); } public @NonNull NetworkServiceState[] newArray(int size) { return new NetworkServiceState[size]; } }; /** @hide */ @Override public void writeToParcel(@NonNull Parcel out, int flags) { out.writeParcelable(mDevice, 0); out.writeInt(mIsServiceAvailable ? 1 : 0); out.writeString(mOperatorName); out.writeInt(mSignalStrength); out.writeInt(mIsRoaming ? 1 : 0); } /** @hide */ @Override public int describeContents() { return 0; } } /** * Intent used to broadcast the change in network service state of an HFP Client device * *

This intent will have 2 extras: * *

* * @hide */ @SuppressLint("ActionValue") @SystemApi @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_NETWORK_SERVICE_STATE_CHANGED = "android.bluetooth.headsetclient.profile.action.NETWORK_SERVICE_STATE_CHANGED"; /** * Extra for the network service state changed intent. * *

This extra represents the current network service state of a connected Bluetooth device. * * @hide */ @SuppressLint("ActionValue") @SystemApi public static final String EXTRA_NETWORK_SERVICE_STATE = "android.bluetooth.headsetclient.extra.EXTRA_NETWORK_SERVICE_STATE"; /** * Get the network service state for a device * * @param device The {@link BluetoothDevice} you want the network service state for * @return A {@link NetworkServiceState} representing the network service state of the device, * or null if the device is not connected * @hide */ @SystemApi @RequiresBluetoothConnectPermission @RequiresPermission( allOf = { android.Manifest.permission.BLUETOOTH_CONNECT, android.Manifest.permission.BLUETOOTH_PRIVILEGED, }) public @Nullable NetworkServiceState getNetworkServiceState(@NonNull BluetoothDevice device) { if (device == null) { return null; } Bundle agEvents = getCurrentAgEvents(device); if (agEvents == null) { return null; } boolean isServiceAvailable = (agEvents.getInt(EXTRA_NETWORK_STATUS, 0) == 1); int signalStrength = agEvents.getInt(EXTRA_NETWORK_SIGNAL_STRENGTH, 0); String operatorName = agEvents.getString(EXTRA_OPERATOR_NAME, null); boolean isRoaming = (agEvents.getInt(EXTRA_NETWORK_ROAMING, 0) == 1); return new NetworkServiceState( device, isServiceAvailable, operatorName, signalStrength, isRoaming); } private boolean isEnabled() { return mAdapter.getState() == BluetoothAdapter.STATE_ON; } private static boolean isValidDevice(BluetoothDevice device) { return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress()); } private static void log(String msg) { Log.d(TAG, msg); } }