584 lines
25 KiB
Java
584 lines
25 KiB
Java
/*
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* Copyright 2021 HIMSA II K/S - www.himsa.com.
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* Represented by EHIMA - www.ehima.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import static android.bluetooth.BluetoothUtils.getSyncTimeout;
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import android.Manifest;
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import android.annotation.CallbackExecutor;
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import android.annotation.IntRange;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.annotation.RequiresPermission;
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import android.annotation.SdkConstant;
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import android.annotation.SdkConstant.SdkConstantType;
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import android.annotation.SuppressLint;
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import android.annotation.SystemApi;
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import android.bluetooth.annotations.RequiresBluetoothConnectPermission;
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import android.content.AttributionSource;
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import android.content.Context;
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import android.os.IBinder;
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import android.os.RemoteException;
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import android.util.CloseGuard;
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import android.util.Log;
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import com.android.modules.utils.SynchronousResultReceiver;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.Executor;
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import java.util.concurrent.TimeoutException;
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/**
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* This class provides the public APIs to control the Bluetooth Volume Control service.
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*
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* <p>BluetoothVolumeControl is a proxy object for controlling the Bluetooth VC
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* Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
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* the BluetoothVolumeControl proxy object.
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* @hide
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*/
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@SystemApi
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public final class BluetoothVolumeControl implements BluetoothProfile, AutoCloseable {
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private static final String TAG = "BluetoothVolumeControl";
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private static final boolean DBG = true;
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private static final boolean VDBG = false;
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private CloseGuard mCloseGuard;
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private final Map<Callback, Executor> mCallbackExecutorMap = new HashMap<>();
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/**
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* This class provides a callback that is invoked when volume offset value changes on
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* the remote device.
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*
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* <p> In order to balance volume on the group of Le Audio devices,
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* Volume Offset Control Service (VOCS) shall be used. User can verify
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* if the remote device supports VOCS by calling {@link #isVolumeOffsetAvailable(device)}.
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*
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* @hide
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*/
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@SystemApi
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public interface Callback {
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/**
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* Callback invoked when callback is registered and when volume offset
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* changes on the remote device. Change can be triggered autonomously by the remote device
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* or after volume offset change on the user request done by calling
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* {@link #setVolumeOffset(device, volumeOffset)}
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*
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* @param device remote device whose volume offset changed
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* @param volumeOffset latest volume offset for this device
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* @hide
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*/
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@SystemApi
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void onVolumeOffsetChanged(@NonNull BluetoothDevice device,
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@IntRange(from = -255, to = 255) int volumeOffset);
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}
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@SuppressLint("AndroidFrameworkBluetoothPermission")
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private final IBluetoothVolumeControlCallback mCallback =
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new IBluetoothVolumeControlCallback.Stub() {
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@Override
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public void onVolumeOffsetChanged(@NonNull BluetoothDevice device, int volumeOffset) {
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Attributable.setAttributionSource(device, mAttributionSource);
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for (Map.Entry<BluetoothVolumeControl.Callback, Executor> callbackExecutorEntry:
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mCallbackExecutorMap.entrySet()) {
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BluetoothVolumeControl.Callback callback = callbackExecutorEntry.getKey();
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Executor executor = callbackExecutorEntry.getValue();
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executor.execute(() -> callback.onVolumeOffsetChanged(device, volumeOffset));
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}
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}
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};
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/**
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* Intent used to broadcast the change in connection state of the Volume Control
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* profile.
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*
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* <p>This intent will have 3 extras:
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* <ul>
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* <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
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* <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li>
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* <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
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* </ul>
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*
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* <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
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* {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING},
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* {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}.
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*
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* @hide
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*/
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@SystemApi
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@SuppressLint("ActionValue")
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@RequiresBluetoothConnectPermission
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@RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT)
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@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
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public static final String ACTION_CONNECTION_STATE_CHANGED =
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"android.bluetooth.volume-control.profile.action.CONNECTION_STATE_CHANGED";
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private BluetoothAdapter mAdapter;
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private final AttributionSource mAttributionSource;
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private final BluetoothProfileConnector<IBluetoothVolumeControl> mProfileConnector =
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new BluetoothProfileConnector(this, BluetoothProfile.VOLUME_CONTROL, TAG,
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IBluetoothVolumeControl.class.getName()) {
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@Override
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public IBluetoothVolumeControl getServiceInterface(IBinder service) {
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return IBluetoothVolumeControl.Stub.asInterface(service);
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}
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};
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@SuppressLint("AndroidFrameworkBluetoothPermission")
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private final IBluetoothStateChangeCallback mBluetoothStateChangeCallback =
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new IBluetoothStateChangeCallback.Stub() {
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public void onBluetoothStateChange(boolean up) {
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if (DBG) Log.d(TAG, "onBluetoothStateChange: up=" + up);
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if (!up) {
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return;
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}
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// re-register the service-to-app callback
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synchronized (mCallbackExecutorMap) {
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if (!mCallbackExecutorMap.isEmpty()) {
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try {
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final IBluetoothVolumeControl service = getService();
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if (service != null) {
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final SynchronousResultReceiver<Integer> recv =
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SynchronousResultReceiver.get();
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service.registerCallback(mCallback, mAttributionSource, recv);
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(null);
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}
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} catch (RemoteException e) {
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Log.e(TAG, "onBluetoothServiceUp: Failed to register"
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+ "Volume Control callback", e);
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} catch (TimeoutException e) {
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Log.e(TAG, e.toString() + "\n"
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+ Log.getStackTraceString(new Throwable()));
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}
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}
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}
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}
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};
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/**
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* Create a BluetoothVolumeControl proxy object for interacting with the local
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* Bluetooth Volume Control service.
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*/
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/*package*/ BluetoothVolumeControl(Context context, ServiceListener listener,
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BluetoothAdapter adapter) {
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mAdapter = adapter;
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mAttributionSource = adapter.getAttributionSource();
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mProfileConnector.connect(context, listener);
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IBluetoothManager mgr = mAdapter.getBluetoothManager();
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if (mgr != null) {
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try {
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mgr.registerStateChangeCallback(mBluetoothStateChangeCallback);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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throw e.rethrowFromSystemServer();
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}
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}
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mCloseGuard = new CloseGuard();
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mCloseGuard.open("close");
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}
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@RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
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protected void finalize() {
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if (mCloseGuard != null) {
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mCloseGuard.warnIfOpen();
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}
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close();
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}
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@RequiresPermission(Manifest.permission.BLUETOOTH_PRIVILEGED)
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public void close() {
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if (VDBG) log("close()");
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IBluetoothManager mgr = mAdapter.getBluetoothManager();
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if (mgr != null) {
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try {
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mgr.unregisterStateChangeCallback(mBluetoothStateChangeCallback);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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mProfileConnector.disconnect();
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}
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private IBluetoothVolumeControl getService() { return mProfileConnector.getService(); }
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/**
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* Get the list of connected devices. Currently at most one.
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*
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* @return list of connected devices
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*
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* @hide
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*/
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@SystemApi
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@RequiresBluetoothConnectPermission
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@RequiresPermission(allOf = {
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android.Manifest.permission.BLUETOOTH_CONNECT,
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android.Manifest.permission.BLUETOOTH_PRIVILEGED,
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})
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public @NonNull List<BluetoothDevice> getConnectedDevices() {
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if (DBG) log("getConnectedDevices()");
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final IBluetoothVolumeControl service = getService();
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final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
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if (service == null) {
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Log.w(TAG, "Proxy not attached to service");
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if (DBG) log(Log.getStackTraceString(new Throwable()));
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} else if (isEnabled()) {
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try {
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final SynchronousResultReceiver<List<BluetoothDevice>> recv =
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SynchronousResultReceiver.get();
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service.getConnectedDevices(mAttributionSource, recv);
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return Attributable.setAttributionSource(
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
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mAttributionSource);
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} catch (RemoteException | TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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return defaultValue;
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}
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/**
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* Get the list of devices matching specified states. Currently at most one.
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*
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* @return list of matching devices
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*
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* @hide
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*/
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@RequiresBluetoothConnectPermission
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@RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT)
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public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
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if (DBG) log("getDevicesMatchingStates()");
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final IBluetoothVolumeControl service = getService();
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final List<BluetoothDevice> defaultValue = new ArrayList<BluetoothDevice>();
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if (service == null) {
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Log.w(TAG, "Proxy not attached to service");
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if (DBG) log(Log.getStackTraceString(new Throwable()));
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} else if (isEnabled()) {
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try {
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final SynchronousResultReceiver<List<BluetoothDevice>> recv =
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SynchronousResultReceiver.get();
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service.getDevicesMatchingConnectionStates(states, mAttributionSource, recv);
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return Attributable.setAttributionSource(
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue),
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mAttributionSource);
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} catch (RemoteException | TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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return defaultValue;
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}
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/**
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* Get connection state of device
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*
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* @return device connection state
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*
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* @hide
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*/
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@RequiresBluetoothConnectPermission
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@RequiresPermission(Manifest.permission.BLUETOOTH_CONNECT)
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public int getConnectionState(BluetoothDevice device) {
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if (DBG) log("getConnectionState(" + device + ")");
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final IBluetoothVolumeControl service = getService();
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final int defaultValue = BluetoothProfile.STATE_DISCONNECTED;
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if (service == null) {
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Log.w(TAG, "Proxy not attached to service");
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if (DBG) log(Log.getStackTraceString(new Throwable()));
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} else if (isEnabled() && isValidDevice(device)) {
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try {
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final SynchronousResultReceiver<Integer> recv = SynchronousResultReceiver.get();
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service.getConnectionState(device, mAttributionSource, recv);
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return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
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} catch (RemoteException | TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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return defaultValue;
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}
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/**
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* Register a {@link Callback} that will be invoked during the
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* operation of this profile.
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*
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* Repeated registration of the same <var>callback</var> object will have no effect after
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* the first call to this method, even when the <var>executor</var> is different. API caller
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* would have to call {@link #unregisterCallback(Callback)} with
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* the same callback object before registering it again.
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*
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* @param executor an {@link Executor} to execute given callback
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* @param callback user implementation of the {@link Callback}
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* @throws IllegalArgumentException if a null executor, sink, or callback is given
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* @hide
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*/
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@SystemApi
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@RequiresBluetoothConnectPermission
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@RequiresPermission(allOf = {
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android.Manifest.permission.BLUETOOTH_CONNECT,
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android.Manifest.permission.BLUETOOTH_PRIVILEGED,
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})
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public void registerCallback(@NonNull @CallbackExecutor Executor executor,
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@NonNull Callback callback) {
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Objects.requireNonNull(executor, "executor cannot be null");
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Objects.requireNonNull(callback, "callback cannot be null");
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if (DBG) log("registerCallback");
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synchronized (mCallbackExecutorMap) {
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// If the callback map is empty, we register the service-to-app callback
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if (mCallbackExecutorMap.isEmpty()) {
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if (!mAdapter.isEnabled()) {
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/* If Bluetooth is off, just store callback and it will be registered
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* when Bluetooth is on
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*/
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mCallbackExecutorMap.put(callback, executor);
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return;
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}
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try {
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final IBluetoothVolumeControl service = getService();
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if (service != null) {
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final SynchronousResultReceiver<Integer> recv =
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SynchronousResultReceiver.get();
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service.registerCallback(mCallback, mAttributionSource, recv);
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(null);
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}
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} catch (RemoteException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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throw e.rethrowFromSystemServer();
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} catch (TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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// Adds the passed in callback to our map of callbacks to executors
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if (mCallbackExecutorMap.containsKey(callback)) {
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throw new IllegalArgumentException("This callback has already been registered");
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}
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mCallbackExecutorMap.put(callback, executor);
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}
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}
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/**
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* Unregister the specified {@link Callback}.
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* <p>The same {@link Callback} object used when calling
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* {@link #registerCallback(Executor, Callback)} must be used.
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*
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* <p>Callbacks are automatically unregistered when application process goes away
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*
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* @param callback user implementation of the {@link Callback}
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* @throws IllegalArgumentException when callback is null or when no callback is registered
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* @hide
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*/
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@SystemApi
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@RequiresBluetoothConnectPermission
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@RequiresPermission(allOf = {
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android.Manifest.permission.BLUETOOTH_CONNECT,
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android.Manifest.permission.BLUETOOTH_PRIVILEGED,
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})
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public void unregisterCallback(@NonNull Callback callback) {
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Objects.requireNonNull(callback, "callback cannot be null");
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if (DBG) log("unregisterCallback");
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synchronized (mCallbackExecutorMap) {
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if (mCallbackExecutorMap.remove(callback) == null) {
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throw new IllegalArgumentException("This callback has not been registered");
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}
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}
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// If the callback map is empty, we unregister the service-to-app callback
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if (mCallbackExecutorMap.isEmpty()) {
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try {
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final IBluetoothVolumeControl service = getService();
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if (service != null) {
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final SynchronousResultReceiver<Integer> recv = SynchronousResultReceiver.get();
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service.unregisterCallback(mCallback, mAttributionSource, recv);
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(null);
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}
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} catch (RemoteException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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throw e.rethrowFromSystemServer();
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} catch (IllegalStateException | TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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}
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/**
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* Tells the remote device to set a volume offset to the absolute volume.
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*
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* @param device {@link BluetoothDevice} representing the remote device
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* @param volumeOffset volume offset to be set on the remote device
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*
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* @hide
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*/
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@SystemApi
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@RequiresBluetoothConnectPermission
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@RequiresPermission(allOf = {
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android.Manifest.permission.BLUETOOTH_CONNECT,
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android.Manifest.permission.BLUETOOTH_PRIVILEGED,
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})
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public void setVolumeOffset(@NonNull BluetoothDevice device,
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@IntRange(from = -255, to = 255) int volumeOffset) {
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if (DBG) log("setVolumeOffset(" + device + " volumeOffset: " + volumeOffset + ")");
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final IBluetoothVolumeControl service = getService();
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if (service == null) {
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Log.w(TAG, "Proxy not attached to service");
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if (DBG) log(Log.getStackTraceString(new Throwable()));
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} else if (isEnabled()) {
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try {
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final SynchronousResultReceiver recv = SynchronousResultReceiver.get();
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service.setVolumeOffset(device, volumeOffset, mAttributionSource, recv);
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(null);
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} catch (RemoteException | TimeoutException e) {
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Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
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}
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}
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}
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|
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/**
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* Provides information about the possibility to set volume offset on the remote device.
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* If the remote device supports Volume Offset Control Service, it is automatically
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* connected.
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*
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* @param device {@link BluetoothDevice} representing the remote device
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* @return {@code true} if volume offset function is supported and available to use on the
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* remote device. When Bluetooth is off, the return value should always be
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* {@code false}.
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* @hide
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*/
|
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@SystemApi
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@RequiresBluetoothConnectPermission
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@RequiresPermission(allOf = {
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android.Manifest.permission.BLUETOOTH_CONNECT,
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android.Manifest.permission.BLUETOOTH_PRIVILEGED,
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})
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public boolean isVolumeOffsetAvailable(@NonNull BluetoothDevice device) {
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if (DBG) log("isVolumeOffsetAvailable(" + device + ")");
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final IBluetoothVolumeControl service = getService();
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if (service == null) {
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Log.w(TAG, "Proxy not attached to service");
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if (DBG) log(Log.getStackTraceString(new Throwable()));
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return false;
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}
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if (!isEnabled()) {
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return false;
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}
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|
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final boolean defaultValue = false;
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try {
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final SynchronousResultReceiver recv = SynchronousResultReceiver.get();
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service.isVolumeOffsetAvailable(device, mAttributionSource, recv);
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recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
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} catch (RemoteException | TimeoutException e) {
|
|
Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
|
|
}
|
|
|
|
return defaultValue;
|
|
}
|
|
|
|
/**
|
|
* Set connection policy of the profile
|
|
*
|
|
* <p> The device should already be paired.
|
|
* Connection policy can be one of {@link #CONNECTION_POLICY_ALLOWED},
|
|
* {@link #CONNECTION_POLICY_FORBIDDEN}, {@link #CONNECTION_POLICY_UNKNOWN}
|
|
*
|
|
* @param device Paired bluetooth device
|
|
* @param connectionPolicy is the connection policy to set to for this profile
|
|
* @return true if connectionPolicy is set, false on error
|
|
* @hide
|
|
*/
|
|
@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 IBluetoothVolumeControl service = getService();
|
|
final boolean defaultValue = false;
|
|
if (service == null) {
|
|
Log.w(TAG, "Proxy not attached to service");
|
|
if (DBG) log(Log.getStackTraceString(new Throwable()));
|
|
} else if (isEnabled() && isValidDevice(device)
|
|
&& (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN
|
|
|| connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED)) {
|
|
try {
|
|
final SynchronousResultReceiver<Boolean> recv = SynchronousResultReceiver.get();
|
|
service.setConnectionPolicy(device, connectionPolicy, mAttributionSource, recv);
|
|
return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
|
|
} catch (RemoteException | TimeoutException e) {
|
|
Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
|
|
}
|
|
}
|
|
return defaultValue;
|
|
}
|
|
|
|
/**
|
|
* Get the connection policy of the profile.
|
|
*
|
|
* <p> The connection policy can be any of:
|
|
* {@link #CONNECTION_POLICY_ALLOWED}, {@link #CONNECTION_POLICY_FORBIDDEN},
|
|
* {@link #CONNECTION_POLICY_UNKNOWN}
|
|
*
|
|
* @param device Bluetooth device
|
|
* @return connection policy of the device
|
|
* @hide
|
|
*/
|
|
@SystemApi
|
|
@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 IBluetoothVolumeControl service = getService();
|
|
final int defaultValue = BluetoothProfile.CONNECTION_POLICY_FORBIDDEN;
|
|
if (service == null) {
|
|
Log.w(TAG, "Proxy not attached to service");
|
|
if (DBG) log(Log.getStackTraceString(new Throwable()));
|
|
} else if (isEnabled() && isValidDevice(device)) {
|
|
try {
|
|
final SynchronousResultReceiver<Integer> recv = SynchronousResultReceiver.get();
|
|
service.getConnectionPolicy(device, mAttributionSource, recv);
|
|
return recv.awaitResultNoInterrupt(getSyncTimeout()).getValue(defaultValue);
|
|
} catch (RemoteException | TimeoutException e) {
|
|
Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable()));
|
|
}
|
|
}
|
|
return defaultValue;
|
|
}
|
|
|
|
private boolean isEnabled() {
|
|
return mAdapter.getState() == BluetoothAdapter.STATE_ON;
|
|
}
|
|
|
|
private static boolean isValidDevice(@Nullable BluetoothDevice device) {
|
|
return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress());
|
|
}
|
|
|
|
private static void log(String msg) {
|
|
Log.d(TAG, msg);
|
|
}
|
|
}
|