Hearing Aid State Machine without native interface (3e1b61a6) · Commits · e / os / android_packages_apps_Bluetooth

src/com/android/bluetooth/hearingaid/HearingAidService.java

+188 −60

Original line number	Diff line number	Diff line
		@@ -17,7 +17,6 @@
		package com.android.bluetooth.hearingaid;

		import android.bluetooth.BluetoothAdapter;
		import android.bluetooth.BluetoothCodecStatus;
		import android.bluetooth.BluetoothDevice;
		import android.bluetooth.BluetoothHearingAid;
		import android.bluetooth.BluetoothProfile;
		@@ -42,6 +41,7 @@ import java.util.HashMap;
		import java.util.List;
		import java.util.Map;
		import java.util.Objects;
		import java.util.Set;

		/**
		* Provides Bluetooth HearingAid profile, as a service in the Bluetooth application.
		@@ -58,8 +58,13 @@ public class HearingAidService extends ProfileService {

		private BluetoothDevice mActiveDevice;

		private final Map<BluetoothDevice, HearingAidStateMachine> mStateMachines =
		new HashMap<>();
		private final Map<BluetoothDevice, Integer> mDeviceMap = new HashMap<>();

		// Upper limit of all HearingAid devices: Bonded or Connected
		private static final int MAX_HEARING_AID_STATE_MACHINES = 10;

		private BroadcastReceiver mBondStateChangedReceiver;
		private BroadcastReceiver mConnectionStateChangedReceiver;

		@@ -93,12 +98,13 @@ public class HearingAidService extends ProfileService {
		// TODO: Add native interface

		// Step 2: Start handler thread for state machines
		// TODO: Clear state machines
		mStateMachines.clear();
		mStateMachinesThread = new HandlerThread("HearingAidService.StateMachines");
		mStateMachinesThread.start();


		// Step 3: Initialize native interface
		// TODO: Init native interface
		// TODO: Implement me

		// Step 4: Setup broadcast receivers
		IntentFilter filter = new IntentFilter();
		@@ -142,10 +148,16 @@ public class HearingAidService extends ProfileService {
		mConnectionStateChangedReceiver = null;

		// Step 3: Cleanup native interface
		// TODO: Cleanup native interface
		// TODO: Implement me

		// Step 3: Destroy state machines and stop handler thread
		// TODO: Implement me
		synchronized (mStateMachines) {
		for (HearingAidStateMachine sm : mStateMachines.values()) {
		sm.doQuit();
		sm.cleanup();
		}
		mStateMachines.clear();
		}

		if (mStateMachinesThread != null) {
		mStateMachinesThread.quitSafely();
		@@ -153,7 +165,7 @@ public class HearingAidService extends ProfileService {
		}

		// Step 1: Clear BluetoothAdapter, AdapterService, HearingAidNativeInterface
		// TODO: Set native interface to null
		// TODO: Add native interface
		mAdapterService = null;
		mAdapter = null;

		@@ -206,9 +218,16 @@ public class HearingAidService extends ProfileService {
		return false;
		}

		// TODO: Implement me
		synchronized (mStateMachines) {
		HearingAidStateMachine smConnect = getOrCreateStateMachine(device);
		if (smConnect == null) {
		Log.e(TAG, "Cannot connect to " + device + " : no state machine");
		return false;
		}
		smConnect.sendMessage(HearingAidStateMachine.CONNECT);
		return true;
		}
		}

		boolean disconnect(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH ADMIN permission");
		@@ -216,14 +235,34 @@ public class HearingAidService extends ProfileService {
		Log.d(TAG, "disconnect(): " + device);
		}

		// TODO: Implement me
		return false;
		int hiSyncId = mDeviceMap.get(device);
		for (BluetoothDevice storedDevice : mDeviceMap.keySet()) {
		if (mDeviceMap.get(storedDevice) != hiSyncId) {
		continue;
		}
		synchronized (mStateMachines) {
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm == null) {
		Log.e(TAG, "Ignored disconnect request for " + device + " : no state machine");
		continue;
		}
		sm.sendMessage(HearingAidStateMachine.DISCONNECT);
		}
		}
		return true;
		}

		List<BluetoothDevice> getConnectedDevices() {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		// TODO: Implement me
		return new ArrayList<>();
		synchronized (mStateMachines) {
		List<BluetoothDevice> devices = new ArrayList<BluetoothDevice>();
		for (HearingAidStateMachine sm : mStateMachines.values()) {
		if (sm.isConnected()) {
		devices.add(sm.getDevice());
		}
		}
		return devices;
		}
		}

		/**
		@@ -233,14 +272,54 @@ public class HearingAidService extends ProfileService {
		* @param device the peer device to connect to
		* @return true if connection is allowed, otherwise false
		*/
		boolean okToConnect(BluetoothDevice device) {
		throw new IllegalStateException("Implement me");
		@VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
		public boolean okToConnect(BluetoothDevice device) {
		// Check if this is an incoming connection in Quiet mode.
		if (mAdapterService.isQuietModeEnabled()) {
		Log.e(TAG, "okToConnect: cannot connect to " + device + " : quiet mode enabled");
		return false;
		}
		// Check priority and accept or reject the connection
		int priority = getPriority(device);
		int bondState = mAdapterService.getBondState(device);
		// Allow the connection only if the device is bonded or bonding.
		if ((priority == BluetoothProfile.PRIORITY_UNDEFINED)
		&& (bondState == BluetoothDevice.BOND_NONE)) {
		Log.e(TAG, "okToConnect: cannot connect to " + device + " : priority=" + priority
		+ " bondState=" + bondState);
		return false;
		}
		if (priority <= BluetoothProfile.PRIORITY_OFF) {
		Log.e(TAG, "okToConnect: cannot connect to " + device + " : priority=" + priority);
		return false;
		}
		return true;
		}

		List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		// TODO: Implement me
		return new ArrayList<>();
		synchronized (mStateMachines) {
		List<BluetoothDevice> devices = new ArrayList<BluetoothDevice>();
		Set<BluetoothDevice> bondedDevices = mAdapter.getBondedDevices();

		for (BluetoothDevice device : bondedDevices) {
		ParcelUuid[] featureUuids = device.getUuids();
		if (!BluetoothUuid.isUuidPresent(featureUuids, BluetoothUuid.HearingAid)) {
		continue;
		}
		int connectionState = BluetoothProfile.STATE_DISCONNECTED;
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm != null) {
		connectionState = sm.getConnectionState();
		}
		for (int i = 0; i < states.length; i++) {
		if (connectionState == states[i]) {
		devices.add(device);
		}
		}
		}
		return devices;
		}
		}

		/**
		@@ -250,15 +329,25 @@ public class HearingAidService extends ProfileService {
		*/
		@VisibleForTesting
		List<BluetoothDevice> getDevices() {
		// TODO: Implement me
		return new ArrayList<>();
		List<BluetoothDevice> devices = new ArrayList<>();
		synchronized (mStateMachines) {
		for (HearingAidStateMachine sm : mStateMachines.values()) {
		devices.add(sm.getDevice());
		}
		return devices;
		}
		}

		int getConnectionState(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		// TODO: Implement me
		synchronized (mStateMachines) {
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm == null) {
		return BluetoothProfile.STATE_DISCONNECTED;
		}
		return sm.getConnectionState();
		}
		}

		/**
		* Set the active device.
		@@ -268,7 +357,7 @@ public class HearingAidService extends ProfileService {
		*/
		public synchronized boolean setActiveDevice(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH ADMIN permission");
		// TODO: Implement me

		return false;
		}

		@@ -279,11 +368,15 @@ public class HearingAidService extends ProfileService {
		*/
		public synchronized BluetoothDevice getActiveDevice() {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		throw new IllegalStateException("Implement me");
		synchronized (mStateMachines) {
		return mActiveDevice;
		}
		}

		private synchronized boolean isActiveDevice(BluetoothDevice device) {
		throw new IllegalStateException("Implement me");
		synchronized (mStateMachines) {
		return (device != null) && Objects.equals(device, mActiveDevice);
		}
		}

		/**
		@@ -302,12 +395,7 @@ public class HearingAidService extends ProfileService {
		}
		return true;
		}
		/**
		* Get the priority of the Hearing Aid profile.
		*
		* @param device the remote device
		* @return the profile priority
		*/

		public int getPriority(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH_ADMIN permission");
		int priority = Settings.Global.getInt(getContentResolver(),
		@@ -316,28 +404,29 @@ public class HearingAidService extends ProfileService {
		return priority;
		}

		synchronized boolean isHearingAidPlaying(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		if (DBG) {
		Log.d(TAG, "isHearingAidPlaying(" + device + ")");
		private HearingAidStateMachine getOrCreateStateMachine(BluetoothDevice device) {
		if (device == null) {
		Log.e(TAG, "getOrCreateStateMachine failed: device cannot be null");
		return null;
		}
		throw new IllegalStateException("Implement me");
		synchronized (mStateMachines) {
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm != null) {
		return sm;
		}
		// Limit the maximum number of state machines to avoid DoS attack
		if (mStateMachines.size() > MAX_HEARING_AID_STATE_MACHINES) {
		Log.e(TAG, "Maximum number of HearingAid state machines reached: "
		+ MAX_HEARING_AID_STATE_MACHINES);
		return null;
		}

		/**
		* Gets the current codec status (configuration and capability).
		*
		* @param device the remote Bluetooth device. If null, use the currect
		* active HearingAid Bluetooth device.
		* @return the current codec status
		* @hide
		*/
		public BluetoothCodecStatus getCodecStatus(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		if (DBG) {
		Log.d(TAG, "getCodecStatus(" + device + ")");
		Log.d(TAG, "Creating a new state machine for " + device);
		}
		sm = HearingAidStateMachine.make(device, this, mStateMachinesThread.getLooper());
		mStateMachines.put(device, sm);
		return sm;
		}
		throw new IllegalStateException("Implement me");
		}

		private void broadcastActiveDevice(BluetoothDevice device) {
		@@ -362,13 +451,8 @@ public class HearingAidService extends ProfileService {
		int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
		BluetoothDevice.ERROR);
		BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
		if (DBG) {
		Log.d(TAG, "Bond state changed for device: " + device + " state: " + state);
		}
		if (state != BluetoothDevice.BOND_NONE) {
		return;
		}
		// TODO: Implement me
		Objects.requireNonNull(device, "ACTION_BOND_STATE_CHANGED with no EXTRA_DEVICE");
		bondStateChanged(device, state);
		}
		}

		@@ -390,12 +474,45 @@ public class HearingAidService extends ProfileService {
		if (bondState != BluetoothDevice.BOND_NONE) {
		return;
		}
		// TODO: Implement me
		synchronized (mStateMachines) {
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm == null) {
		return;
		}
		if (sm.getConnectionState() != BluetoothProfile.STATE_DISCONNECTED) {
		return;
		}
		removeStateMachine(device);
		}
		}

		private void removeStateMachine(BluetoothDevice device) {
		synchronized (mStateMachines) {
		HearingAidStateMachine sm = mStateMachines.get(device);
		if (sm == null) {
		Log.w(TAG, "removeStateMachine: device " + device
		+ " does not have a state machine");
		return;
		}
		Log.i(TAG, "removeStateMachine: removing state machine for device: " + device);
		sm.doQuit();
		sm.cleanup();
		mStateMachines.remove(device);
		}
		}

		private synchronized void connectionStateChanged(BluetoothDevice device, int fromState,
		int toState) {
		// TODO: Implement me
		if ((device == null) \|\| (fromState == toState)) {
		return;
		}
		// Check if the device is disconnected - if unbond, remove the state machine
		if (toState == BluetoothProfile.STATE_DISCONNECTED) {
		int bondState = mAdapterService.getBondState(device);
		if (bondState == BluetoothDevice.BOND_NONE) {
		removeStateMachine(device);
		}
		}
		}

		private class ConnectionStateChangedReceiver extends BroadcastReceiver {
		@@ -429,6 +546,14 @@ public class HearingAidService extends ProfileService {
		return null;
		}

		@VisibleForTesting
		HearingAidService getServiceForTesting() {
		if (mService != null && mService.isAvailable()) {
		return mService;
		}
		return null;
		}

		BluetoothHearingAidBinder(HearingAidService svc) {
		mService = svc;
		}
		@@ -503,12 +628,12 @@ public class HearingAidService extends ProfileService {

		@Override
		public void setVolume(int volume) {
		// TODO: Implement me
		// Android sends value in scale 0 to 25, hearing aid accept -128 to 0
		volume = ((volume * 512) / 100) - 128;
		}

		@Override
		public void adjustVolume(int direction) {
		// TODO: Implement me
		}

		@Override
		@@ -536,5 +661,8 @@ public class HearingAidService extends ProfileService {
		public void dump(StringBuilder sb) {
		super.dump(sb);
		ProfileService.println(sb, "mActiveDevice: " + mActiveDevice);
		for (HearingAidStateMachine sm : mStateMachines.values()) {
		sm.dump(sb);
		}
		}
		}

src/com/android/bluetooth/hearingaid/HearingAidStateMachine.java

0 → 100644

+377 −0

File added.

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tests/unit/src/com/android/bluetooth/hearingaid/HearingAidStateMachineTest.java

0 → 100644

+97 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2018 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 com.android.bluetooth.hearingaid;

		import android.bluetooth.BluetoothAdapter;
		import android.bluetooth.BluetoothDevice;
		import android.bluetooth.BluetoothProfile;
		import android.content.Context;
		import android.os.HandlerThread;
		import android.support.test.InstrumentationRegistry;
		import android.support.test.filters.MediumTest;
		import android.support.test.runner.AndroidJUnit4;

		import com.android.bluetooth.R;
		import com.android.bluetooth.TestUtils;
		import com.android.bluetooth.btservice.AdapterService;

		import org.junit.After;
		import org.junit.Assert;
		import org.junit.Assume;
		import org.junit.Before;
		import org.junit.Test;
		import org.junit.runner.RunWith;
		import org.mockito.Mock;
		import org.mockito.MockitoAnnotations;

		@MediumTest
		@RunWith(AndroidJUnit4.class)
		public class HearingAidStateMachineTest {
		private BluetoothAdapter mAdapter;
		private Context mTargetContext;
		private HandlerThread mHandlerThread;
		private HearingAidStateMachine mHearingAidStateMachine;
		private BluetoothDevice mTestDevice;
		private static final int TIMEOUT_MS = 1000; // 1s

		@Mock private AdapterService mAdapterService;
		@Mock private HearingAidService mHearingAidService;

		@Before
		public void setUp() throws Exception {
		mTargetContext = InstrumentationRegistry.getTargetContext();
		Assume.assumeTrue("Ignore test when HearingAidService is not enabled",
		mTargetContext.getResources().getBoolean(R.bool.profile_supported_hearing_aid));
		// Set up mocks and test assets
		MockitoAnnotations.initMocks(this);
		TestUtils.setAdapterService(mAdapterService);

		mAdapter = BluetoothAdapter.getDefaultAdapter();

		// Get a device for testing
		mTestDevice = mAdapter.getRemoteDevice("00:01:02:03:04:05");

		// Set up thread and looper
		mHandlerThread = new HandlerThread("HearingAidStateMachineTestHandlerThread");
		mHandlerThread.start();
		mHearingAidStateMachine = new HearingAidStateMachine(mTestDevice, mHearingAidService,
		mHandlerThread.getLooper());
		// Override the timeout value to speed up the test
		mHearingAidStateMachine.sConnectTimeoutMs = 1000; // 1s
		mHearingAidStateMachine.start();
		}

		@After
		public void tearDown() throws Exception {
		if (!mTargetContext.getResources().getBoolean(R.bool.profile_supported_hearing_aid)) {
		return;
		}
		mHearingAidStateMachine.doQuit();
		mHandlerThread.quit();
		TestUtils.clearAdapterService(mAdapterService);
		}

		/**
		* Test that default state is disconnected
		*/
		@Test
		public void testDefaultDisconnectedState() {
		Assert.assertEquals(BluetoothProfile.STATE_DISCONNECTED,
		mHearingAidStateMachine.getConnectionState());
		}

		}