Register Adapter state change callback with adapter service instead of relying on callback.

// Describes the phone policy

//

// The policy should be as decoupled from the stack as possible. In an ideal world we should not

// need to have this policy talk with any non-public APIs and one way to enforce that would be to

// keep this file outside the Bluetooth process. Unfortunately, keeping a separate process alive is

// an expensive and a tedious task.

//

// Best practices:

// a) PhonePolicy should be ALL private methods

//    -- Use broadcasts which can be listened in on the BroadcastReceiver

// b) NEVER call from the PhonePolicy into the Java stack, unless public APIs. It is OK to call into

// the non public versions as long as public versions exist (so that a 3rd party policy can mimick)

// us.

//

// Policy description:

//

// Policies are usually governed by outside events that may warrant an action. We talk about various

// events and the resulting outcome from this policy:

//

// 2. When the profile connection-state changes: At this point if a new profile gets CONNECTED we

// will try to connect other profiles on the same device. This is to avoid collision if devices

// somehow end up trying to connect at same time or general connection issues.

class PhonePolicy {

class PhonePolicy implements AdapterService.BluetoothStateCallback {

    private static final boolean DBG = true;

    private static final String TAG = "BluetoothPhonePolicy";

    // Message types for the handler (internal messages generated by intents or timeouts)

    private static final int MESSAGE_CONNECT_OTHER_PROFILES = 3;

    private static final int MESSAGE_ADAPTER_STATE_TURNED_ON = 4;

    private static final int MESSAGE_DEVICE_CONNECTED = 6;

    @VisibleForTesting static final String AUTO_CONNECT_PROFILES_PROPERTY =

    private final HashSet<BluetoothDevice> mConnectOtherProfilesDeviceSet = new HashSet<>();

    @VisibleForTesting boolean mAutoConnectProfilesSupported;

    @Override

    public void onBluetoothStateChange(int prevState, int newState) {

        // Only act if the adapter has actually changed state from non-ON to ON.

        // NOTE: ON is the state depicting BREDR ON and not just BLE ON.

        if (newState == BluetoothAdapter.STATE_ON) {

            resetStates();

            autoConnect();

        }

    }

    public void profileConnectionStateChanged(

            int profile, BluetoothDevice device, int fromState, int toState) {

        switch (profile) {

                return;

            }

            switch (action) {

                case BluetoothAdapter.ACTION_STATE_CHANGED:

                    // Only pass the message on if the adapter has actually changed state from

                    // non-ON to ON. NOTE: ON is the state depicting BREDR ON and not just BLE ON.

                    int newState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);

                    if (newState == BluetoothAdapter.STATE_ON) {

                        mHandler.obtainMessage(MESSAGE_ADAPTER_STATE_TURNED_ON).sendToTarget();

                    }

                    break;

                case BluetoothDevice.ACTION_ACL_CONNECTED:

                    mHandler.obtainMessage(MESSAGE_DEVICE_CONNECTED, intent).sendToTarget();

                    break;

                    mConnectOtherProfilesDeviceSet.remove(device);

                    break;

                }

                case MESSAGE_ADAPTER_STATE_TURNED_ON:

                    // Call auto connect when adapter switches state to ON

                    resetStates();

                    autoConnect();

                    break;

                case MESSAGE_DEVICE_CONNECTED:

                    Intent intent = (Intent) msg.obj;

                    BluetoothDevice device =

                            intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

                    processDeviceConnected(device);

                    break;

            }

        }

    }

    // Policy API functions for lifecycle management (protected)

    protected void start() {

        mAdapterService.registerBluetoothStateCallback((command) -> mHandler.post(command), this);

        IntentFilter filter = new IntentFilter();

        filter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);

        filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);

        filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);

        mAdapterService.registerReceiver(mReceiver, filter);

    }

    protected void cleanup() {

        mAdapterService.unregisterBluetoothStateCallback(this);

        mAdapterService.unregisterReceiver(mReceiver);

        resetStates();

    }

                BluetoothProfile.CONNECTION_POLICY_ALLOWED);

        // Inject an event that the adapter is turned on.

        Intent intent = new Intent(BluetoothAdapter.ACTION_STATE_CHANGED);

        intent.putExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.STATE_ON);

        mPhonePolicy.getBroadcastReceiver().onReceive(null /* context */, intent);

        mPhonePolicy.onBluetoothStateChange(BluetoothAdapter.STATE_OFF, BluetoothAdapter.STATE_ON);

        // Check that we got a request to connect over HFP and A2DP

        verify(mA2dpService, timeout(ASYNC_CALL_TIMEOUT_MILLIS)).connect(eq(bondedDevice));

        verify(mHeadsetService, timeout(ASYNC_CALL_TIMEOUT_MILLIS)).connect(eq(bondedDevice));

        verify(mA2dpService).connect(eq(bondedDevice));

        verify(mHeadsetService).connect(eq(bondedDevice));

    }

    /**