Merge changes I6ff80178,I03875cf1,I8d210b68

* changes:
  New setting for recommendation request timeout.
  Implemented the async recommendation request call.
  Async network recommendation requests.
This commit is contained in:
Treehugger Robot
2017-01-19 22:55:16 +00:00
committed by Gerrit Code Review
5 changed files with 438 additions and 17 deletions

View File

@@ -21,6 +21,7 @@ import android.net.NetworkKey;
import android.net.RecommendationRequest;
import android.net.RecommendationResult;
import android.net.ScoredNetwork;
import android.os.RemoteCallback;
/**
* A service for updating network scores from a network scorer application.
@@ -117,4 +118,16 @@ interface INetworkScoreService
* scorer.
*/
String getActiveScorerPackage();
/**
* Request a recommendation for the best network to connect to
* taking into account the inputs from the {@link RecommendationRequest}.
*
* @param request a {@link RecommendationRequest} instance containing the details of the request
* @param remoteCallback a {@link RemoteCallback} instance to invoke when the recommendation
* is available.
* @throws SecurityException if the caller is not the system
*/
oneway void requestRecommendationAsync(in RecommendationRequest request,
in RemoteCallback remoteCallback);
}

View File

@@ -16,17 +16,24 @@
package android.net;
import static android.net.NetworkRecommendationProvider.EXTRA_RECOMMENDATION_RESULT;
import android.Manifest;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.annotation.SystemApi;
import android.content.Context;
import android.content.Intent;
import android.net.NetworkScorerAppManager.NetworkScorerAppData;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteCallback;
import android.os.RemoteException;
import android.os.ServiceManager;
import com.android.internal.util.Preconditions;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
@@ -356,4 +363,53 @@ public class NetworkScoreManager {
throw e.rethrowFromSystemServer();
}
}
/**
* Request a recommendation for which network to connect to.
*
* <p>The callback will be run on the thread associated with provided {@link Handler}.
*
* @param request a {@link RecommendationRequest} instance containing additional
* request details
* @param callback a {@link RecommendationCallback} instance that will be invoked when
* the {@link RecommendationResult} is available
* @param handler a {@link Handler} instance representing the thread to run the callback on.
* @throws SecurityException
* @hide
*/
public void requestRecommendation(
final @NonNull RecommendationRequest request,
final @NonNull RecommendationCallback callback,
final @NonNull Handler handler) {
Preconditions.checkNotNull(request, "RecommendationRequest cannot be null.");
Preconditions.checkNotNull(callback, "RecommendationCallback cannot be null.");
Preconditions.checkNotNull(handler, "Handler cannot be null.");
RemoteCallback remoteCallback = new RemoteCallback(new RemoteCallback.OnResultListener() {
@Override
public void onResult(Bundle data) {
RecommendationResult result = data.getParcelable(EXTRA_RECOMMENDATION_RESULT);
callback.onRecommendationAvailable(result);
}
}, handler);
try {
mService.requestRecommendationAsync(request, remoteCallback);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Callers of {@link #requestRecommendation(RecommendationRequest, RecommendationCallback, Handler)}
* must pass in an implementation of this class.
* @hide
*/
public abstract static class RecommendationCallback {
/**
* Invoked when a {@link RecommendationResult} is available.
* @param result a {@link RecommendationResult} instance.
*/
public abstract void onRecommendationAvailable(RecommendationResult result);
}
}

View File

@@ -7672,6 +7672,16 @@ public final class Settings {
public static final String NETWORK_RECOMMENDATIONS_ENABLED =
"network_recommendations_enabled";
/**
* The number of milliseconds the {@link com.android.server.NetworkScoreService}
* will give a recommendation request to complete before returning a default response.
*
* Type: long
* @hide
*/
public static final String NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS =
"network_recommendation_request_timeout_ms";
/**
* Settings to allow BLE scans to be enabled even when Bluetooth is turned off for
* connectivity.

View File

@@ -42,15 +42,22 @@ import android.net.RecommendationResult;
import android.net.ScoredNetwork;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.IRemoteCallback;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteCallback;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.UserHandle;
import android.provider.Settings;
import android.provider.Settings.Global;
import android.util.ArrayMap;
import android.util.Log;
import android.util.Pair;
import android.util.TimedRemoteCaller;
import com.android.internal.annotations.GuardedBy;
@@ -67,6 +74,7 @@ import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Consumer;
/**
@@ -75,7 +83,7 @@ import java.util.function.Consumer;
*/
public class NetworkScoreService extends INetworkScoreService.Stub {
private static final String TAG = "NetworkScoreService";
private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
private static final boolean DBG = Build.IS_DEBUGGABLE && Log.isLoggable(TAG, Log.DEBUG);
private final Context mContext;
private final NetworkScorerAppManager mNetworkScorerAppManager;
@@ -83,13 +91,16 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
@GuardedBy("mScoreCaches")
private final Map<Integer, RemoteCallbackList<INetworkScoreCache>> mScoreCaches;
/** Lock used to update mPackageMonitor when scorer package changes occur. */
private final Object mPackageMonitorLock = new Object[0];
private final Object mServiceConnectionLock = new Object[0];
private final Object mPackageMonitorLock = new Object();
private final Object mServiceConnectionLock = new Object();
private final Handler mHandler;
private final DispatchingContentObserver mContentObserver;
@GuardedBy("mPackageMonitorLock")
private NetworkScorerPackageMonitor mPackageMonitor;
@GuardedBy("mServiceConnectionLock")
private ScoringServiceConnection mServiceConnection;
private volatile long mRecommendationRequestTimeoutMs;
private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() {
@Override
@@ -185,12 +196,25 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
}
/**
* Reevaluates the service binding when the Settings toggle is changed.
* Dispatches observed content changes to a handler for further processing.
*/
private class SettingsObserver extends ContentObserver {
@VisibleForTesting
public static class DispatchingContentObserver extends ContentObserver {
final private Map<Uri, Integer> mUriEventMap;
final private Context mContext;
final private Handler mHandler;
public SettingsObserver() {
super(null /*handler*/);
public DispatchingContentObserver(Context context, Handler handler) {
super(handler);
mContext = context;
mHandler = handler;
mUriEventMap = new ArrayMap<>();
}
void observe(Uri uri, int what) {
mUriEventMap.put(uri, what);
final ContentResolver resolver = mContext.getContentResolver();
resolver.registerContentObserver(uri, false /*notifyForDescendants*/, this);
}
@Override
@@ -201,16 +225,22 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
@Override
public void onChange(boolean selfChange, Uri uri) {
if (DBG) Log.d(TAG, String.format("onChange(%s, %s)", selfChange, uri));
bindToScoringServiceIfNeeded();
final Integer what = mUriEventMap.get(uri);
if (what != null) {
mHandler.obtainMessage(what).sendToTarget();
} else {
Log.w(TAG, "No matching event to send for URI = " + uri);
}
}
}
public NetworkScoreService(Context context) {
this(context, new NetworkScorerAppManager(context));
this(context, new NetworkScorerAppManager(context), Looper.myLooper());
}
@VisibleForTesting
NetworkScoreService(Context context, NetworkScorerAppManager networkScoreAppManager) {
NetworkScoreService(Context context, NetworkScorerAppManager networkScoreAppManager,
Looper looper) {
mContext = context;
mNetworkScorerAppManager = networkScoreAppManager;
mScoreCaches = new ArrayMap<>();
@@ -219,16 +249,19 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
mContext.registerReceiverAsUser(
mUserIntentReceiver, UserHandle.SYSTEM, filter, null /* broadcastPermission*/,
null /* scheduler */);
// TODO(jjoslin): 12/15/16 - Make timeout configurable.
mRequestRecommendationCaller =
new RequestRecommendationCaller(TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS);
mRecommendationRequestTimeoutMs = TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS;
mHandler = new ServiceHandler(looper);
mContentObserver = new DispatchingContentObserver(context, mHandler);
}
/** Called when the system is ready to run third-party code but before it actually does so. */
void systemReady() {
if (DBG) Log.d(TAG, "systemReady");
registerPackageMonitorIfNeeded();
registerRecommendationSettingObserverIfNeeded();
registerRecommendationSettingsObserver();
refreshRecommendationRequestTimeoutMs();
}
/** Called when the system is ready for us to start third-party code. */
@@ -242,14 +275,18 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
bindToScoringServiceIfNeeded();
}
private void registerRecommendationSettingObserverIfNeeded() {
private void registerRecommendationSettingsObserver() {
final List<String> providerPackages =
mNetworkScorerAppManager.getPotentialRecommendationProviderPackages();
if (!providerPackages.isEmpty()) {
final ContentResolver resolver = mContext.getContentResolver();
final Uri uri = Global.getUriFor(Global.NETWORK_RECOMMENDATIONS_ENABLED);
resolver.registerContentObserver(uri, false, new SettingsObserver());
final Uri enabledUri = Global.getUriFor(Global.NETWORK_RECOMMENDATIONS_ENABLED);
mContentObserver.observe(enabledUri,
ServiceHandler.MSG_RECOMMENDATIONS_ENABLED_CHANGED);
}
final Uri timeoutUri = Global.getUriFor(Global.NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS);
mContentObserver.observe(timeoutUri,
ServiceHandler.MSG_RECOMMENDATION_REQUEST_TIMEOUT_CHANGED);
}
private void registerPackageMonitorIfNeeded() {
@@ -553,6 +590,56 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
}
}
/**
* Request a recommendation for the best network to connect to
* taking into account the inputs from the {@link RecommendationRequest}.
*
* @param request a {@link RecommendationRequest} instance containing the details of the request
* @param remoteCallback a {@link IRemoteCallback} instance to invoke when the recommendation
* is available.
* @throws SecurityException if the caller is not the system
*/
@Override
public void requestRecommendationAsync(RecommendationRequest request,
RemoteCallback remoteCallback) {
mContext.enforceCallingOrSelfPermission(permission.BROADCAST_NETWORK_PRIVILEGED, TAG);
final OneTimeCallback oneTimeCallback = new OneTimeCallback(remoteCallback);
final Pair<RecommendationRequest, OneTimeCallback> pair =
Pair.create(request, oneTimeCallback);
final Message timeoutMsg = mHandler.obtainMessage(
ServiceHandler.MSG_RECOMMENDATION_REQUEST_TIMEOUT, pair);
final INetworkRecommendationProvider provider = getRecommendationProvider();
final long token = Binder.clearCallingIdentity();
try {
if (provider != null) {
try {
mHandler.sendMessageDelayed(timeoutMsg, mRecommendationRequestTimeoutMs);
provider.requestRecommendation(request, new IRemoteCallback.Stub() {
@Override
public void sendResult(Bundle data) throws RemoteException {
// Remove the timeout message
mHandler.removeMessages(timeoutMsg.what, pair);
oneTimeCallback.sendResult(data);
}
}, 0 /*sequence*/);
return;
} catch (RemoteException e) {
Log.w(TAG, "Failed to request a recommendation.", e);
// TODO(jjoslin): 12/15/16 - Keep track of failures.
// Remove the timeout message
mHandler.removeMessages(timeoutMsg.what, pair);
// Will fall through and send back the default recommendation.
}
}
} finally {
Binder.restoreCallingIdentity(token);
}
// Else send back the default recommendation.
sendDefaultRecommendationResponse(request, oneTimeCallback);
}
@Override
public boolean requestScores(NetworkKey[] networks) {
mContext.enforceCallingOrSelfPermission(permission.REQUEST_NETWORK_SCORES, TAG);
@@ -651,6 +738,18 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
return null;
}
@VisibleForTesting
public void refreshRecommendationRequestTimeoutMs() {
final ContentResolver cr = mContext.getContentResolver();
long timeoutMs = Settings.Global.getLong(cr,
Global.NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS, -1L /*default*/);
if (timeoutMs < 0) {
timeoutMs = TimedRemoteCaller.DEFAULT_CALL_TIMEOUT_MILLIS;
}
if (DBG) Log.d(TAG, "Updating the recommendation request timeout to " + timeoutMs + " ms");
mRecommendationRequestTimeoutMs = timeoutMs;
}
private static class ScoringServiceConnection implements ServiceConnection {
private final ComponentName mComponentName;
private final int mScoringAppUid;
@@ -756,4 +855,83 @@ public class NetworkScoreService extends INetworkScoreService.Stub {
return getResultTimed(sequence);
}
}
/**
* A wrapper around {@link RemoteCallback} that guarantees
* {@link RemoteCallback#sendResult(Bundle)} will be invoked at most once.
*/
@VisibleForTesting
public static final class OneTimeCallback {
private final RemoteCallback mRemoteCallback;
private final AtomicBoolean mCallbackRun;
public OneTimeCallback(RemoteCallback remoteCallback) {
mRemoteCallback = remoteCallback;
mCallbackRun = new AtomicBoolean(false);
}
public void sendResult(Bundle data) {
if (mCallbackRun.compareAndSet(false, true)) {
mRemoteCallback.sendResult(data);
}
}
}
private static void sendDefaultRecommendationResponse(RecommendationRequest request,
OneTimeCallback remoteCallback) {
if (DBG) {
Log.d(TAG, "Returning the default network recommendation.");
}
final RecommendationResult result;
if (request != null && request.getCurrentSelectedConfig() != null) {
result = RecommendationResult.createConnectRecommendation(
request.getCurrentSelectedConfig());
} else {
result = RecommendationResult.createDoNotConnectRecommendation();
}
final Bundle data = new Bundle();
data.putParcelable(EXTRA_RECOMMENDATION_RESULT, result);
remoteCallback.sendResult(data);
}
@VisibleForTesting
public final class ServiceHandler extends Handler {
public static final int MSG_RECOMMENDATION_REQUEST_TIMEOUT = 1;
public static final int MSG_RECOMMENDATIONS_ENABLED_CHANGED = 2;
public static final int MSG_RECOMMENDATION_REQUEST_TIMEOUT_CHANGED = 3;
public ServiceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
final int what = msg.what;
switch (what) {
case MSG_RECOMMENDATION_REQUEST_TIMEOUT:
if (DBG) {
Log.d(TAG, "Network recommendation request timed out.");
}
final Pair<RecommendationRequest, OneTimeCallback> pair =
(Pair<RecommendationRequest, OneTimeCallback>) msg.obj;
final RecommendationRequest request = pair.first;
final OneTimeCallback remoteCallback = pair.second;
sendDefaultRecommendationResponse(request, remoteCallback);
break;
case MSG_RECOMMENDATIONS_ENABLED_CHANGED:
bindToScoringServiceIfNeeded();
break;
case MSG_RECOMMENDATION_REQUEST_TIMEOUT_CHANGED:
refreshRecommendationRequestTimeoutMs();
break;
default:
Log.w(TAG,"Unknown message: " + what);
}
}
}
}

View File

@@ -24,6 +24,7 @@ import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertNotNull;
import static junit.framework.Assert.assertNull;
import static junit.framework.Assert.assertSame;
import static junit.framework.Assert.assertTrue;
import static junit.framework.Assert.fail;
@@ -60,21 +61,28 @@ import android.net.NetworkScorerAppManager.NetworkScorerAppData;
import android.net.RecommendationRequest;
import android.net.RecommendationResult;
import android.net.ScoredNetwork;
import android.net.Uri;
import android.net.WifiKey;
import android.net.wifi.WifiConfiguration;
import android.os.Binder;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.IRemoteCallback;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteCallback;
import android.os.RemoteException;
import android.os.UserHandle;
import android.provider.Settings;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.MediumTest;
import android.support.test.runner.AndroidJUnit4;
import com.android.server.devicepolicy.MockUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@@ -89,6 +97,8 @@ import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
* Tests for {@link NetworkScoreService}.
@@ -114,6 +124,9 @@ public class NetworkScoreServiceTest {
private ContentResolver mContentResolver;
private NetworkScoreService mNetworkScoreService;
private RecommendationRequest mRecommendationRequest;
private RemoteCallback mRemoteCallback;
private OnResultListener mOnResultListener;
private HandlerThread mHandlerThread;
@Before
public void setUp() throws Exception {
@@ -123,12 +136,25 @@ public class NetworkScoreServiceTest {
mContentResolver = InstrumentationRegistry.getContext().getContentResolver();
when(mContext.getContentResolver()).thenReturn(mContentResolver);
when(mContext.getResources()).thenReturn(mResources);
mNetworkScoreService = new NetworkScoreService(mContext, mNetworkScorerAppManager);
mHandlerThread = new HandlerThread("NetworkScoreServiceTest");
mHandlerThread.start();
mNetworkScoreService = new NetworkScoreService(mContext, mNetworkScorerAppManager,
mHandlerThread.getLooper());
WifiConfiguration configuration = new WifiConfiguration();
configuration.SSID = "NetworkScoreServiceTest_SSID";
configuration.BSSID = "NetworkScoreServiceTest_BSSID";
mRecommendationRequest = new RecommendationRequest.Builder()
.setCurrentRecommendedWifiConfig(configuration).build();
mOnResultListener = new OnResultListener();
mRemoteCallback = new RemoteCallback(mOnResultListener);
Settings.Global.putLong(mContentResolver,
Settings.Global.NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS, -1L);
mNetworkScoreService.refreshRecommendationRequestTimeoutMs();
}
@After
public void tearDown() throws Exception {
mHandlerThread.quitSafely();
}
@Test
@@ -261,6 +287,116 @@ public class NetworkScoreServiceTest {
result.getWifiConfiguration().BSSID);
}
@Test
public void testRequestRecommendationAsync_noPermission() throws Exception {
doThrow(new SecurityException()).when(mContext)
.enforceCallingOrSelfPermission(eq(permission.BROADCAST_NETWORK_PRIVILEGED),
anyString());
try {
mNetworkScoreService.requestRecommendationAsync(mRecommendationRequest,
mRemoteCallback);
fail("BROADCAST_NETWORK_PRIVILEGED not enforced.");
} catch (SecurityException e) {
// expected
}
}
@Test
public void testRequestRecommendationAsync_providerNotConnected() throws Exception {
mNetworkScoreService.requestRecommendationAsync(mRecommendationRequest,
mRemoteCallback);
boolean callbackRan = mOnResultListener.countDownLatch.await(3, TimeUnit.SECONDS);
assertTrue(callbackRan);
verifyZeroInteractions(mRecommendationProvider);
}
@Test
public void testRequestRecommendationAsync_requestTimesOut() throws Exception {
injectProvider();
Settings.Global.putLong(mContentResolver,
Settings.Global.NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS, 1L);
mNetworkScoreService.refreshRecommendationRequestTimeoutMs();
mNetworkScoreService.requestRecommendationAsync(mRecommendationRequest,
mRemoteCallback);
boolean callbackRan = mOnResultListener.countDownLatch.await(3, TimeUnit.SECONDS);
assertTrue(callbackRan);
verify(mRecommendationProvider).requestRecommendation(eq(mRecommendationRequest),
isA(IRemoteCallback.Stub.class), anyInt());
assertTrue(mOnResultListener.receivedBundle.containsKey(EXTRA_RECOMMENDATION_RESULT));
RecommendationResult result =
mOnResultListener.receivedBundle.getParcelable(EXTRA_RECOMMENDATION_RESULT);
assertTrue(result.hasRecommendation());
assertEquals(mRecommendationRequest.getCurrentSelectedConfig().SSID,
result.getWifiConfiguration().SSID);
}
@Test
public void testRequestRecommendationAsync_requestSucceeds() throws Exception {
injectProvider();
final Bundle bundle = new Bundle();
doAnswer(invocation -> {
invocation.getArgumentAt(1, IRemoteCallback.class).sendResult(bundle);
return null;
}).when(mRecommendationProvider)
.requestRecommendation(eq(mRecommendationRequest), isA(IRemoteCallback.class),
anyInt());
mNetworkScoreService.requestRecommendationAsync(mRecommendationRequest,
mRemoteCallback);
boolean callbackRan = mOnResultListener.countDownLatch.await(3, TimeUnit.SECONDS);
assertTrue(callbackRan);
// If it's not the same instance then something else ran the callback.
assertSame(bundle, mOnResultListener.receivedBundle);
}
@Test
public void testRequestRecommendationAsync_requestThrowsRemoteException() throws Exception {
injectProvider();
doThrow(new RemoteException()).when(mRecommendationProvider)
.requestRecommendation(eq(mRecommendationRequest), isA(IRemoteCallback.class),
anyInt());
mNetworkScoreService.requestRecommendationAsync(mRecommendationRequest,
mRemoteCallback);
boolean callbackRan = mOnResultListener.countDownLatch.await(3, TimeUnit.SECONDS);
assertTrue(callbackRan);
}
@Test
public void dispatchingContentObserver_nullUri() throws Exception {
NetworkScoreService.DispatchingContentObserver observer =
new NetworkScoreService.DispatchingContentObserver(mContext, null /*handler*/);
observer.onChange(false, null);
// nothing to assert or verify but since we passed in a null handler we'd see a NPE
// if it were interacted with.
}
@Test
public void dispatchingContentObserver_dispatchUri() throws Exception {
final CountDownHandler handler = new CountDownHandler(mHandlerThread.getLooper());
NetworkScoreService.DispatchingContentObserver observer =
new NetworkScoreService.DispatchingContentObserver(mContext, handler);
Uri uri = Uri.parse("content://settings/global/network_score_service_test");
int expectedWhat = 24;
observer.observe(uri, expectedWhat);
observer.onChange(false, uri);
final boolean msgHandled = handler.latch.await(3, TimeUnit.SECONDS);
assertTrue(msgHandled);
assertEquals(expectedWhat, handler.receivedWhat);
}
@Test
public void oneTimeCallback_multipleCallbacks() throws Exception {
NetworkScoreService.OneTimeCallback callback =
new NetworkScoreService.OneTimeCallback(mRemoteCallback);
callback.sendResult(null);
callback.sendResult(null);
assertEquals(1, mOnResultListener.resultCount);
}
@Test
public void testUpdateScores_notActiveScorer() {
bindToScorer(false /*callerIsScorer*/);
@@ -515,4 +651,32 @@ public class NetworkScoreServiceTest {
isA(UserHandle.class))).thenReturn(true);
mNetworkScoreService.systemRunning();
}
private static class OnResultListener implements RemoteCallback.OnResultListener {
private final CountDownLatch countDownLatch = new CountDownLatch(1);
private int resultCount;
private Bundle receivedBundle;
@Override
public void onResult(Bundle result) {
countDownLatch.countDown();
resultCount++;
receivedBundle = result;
}
}
private static class CountDownHandler extends Handler {
CountDownLatch latch = new CountDownLatch(1);
int receivedWhat;
CountDownHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
latch.countDown();
receivedWhat = msg.what;
}
}
}