Android13 BluetoothHeadsetClient connect流程分析

BluetoothHeadsetClient connect用于连接HFP，流程图如下：

代码如下：

//packages/modules/Bluetooth/framework/java/android/bluetooth/BluetoothHeadsetClient.java
public final class BluetoothHeadsetClient implements BluetoothProfile, AutoCloseable {
    public boolean connect(BluetoothDevice device) {
        if (DBG) log("connect(" + device + ")");
        final IBluetoothHeadsetClient 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)) {
            try {
                final SynchronousResultReceiver<Boolean> recv = SynchronousResultReceiver.get();
                service.connect(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;
    }
}

调用IBluetoothHeadsetClient的connect，IBluetoothHeadsetClient是一个接口由HeadsetClientService的内部类BluetoothHeadsetClientBinder实

//packages/modules/Bluetooth/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientService.java
public class HeadsetClientService extends ProfileService {
    private static class BluetoothHeadsetClientBinder extends IBluetoothHeadsetClient.Stub
            implements IProfileServiceBinder {
        private HeadsetClientService mService;


        @Override
        public void connect(BluetoothDevice device, AttributionSource source,
                SynchronousResultReceiver receiver) {
            try {
                HeadsetClientService service = getService(source);
                boolean defaultValue = false;
                if (service != null) {
                    defaultValue = service.connect(device);
                }
                receiver.send(defaultValue);
            } catch (RuntimeException e) {
                receiver.propagateException(e);
            }
        }
    }
}

HeadsetClientService connect

调用HeadsetClientService的connect方法：

//packages/modules/Bluetooth/android/app/src/com/android/bluetooth/hfpclient/Heads