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      1 //
      2 // Copyright 2010 The Android Open Source Project
      3 //
      4 
      5 #include <ui/InputTransport.h>
      6 #include <utils/Timers.h>
      7 #include <utils/StopWatch.h>
      8 #include <gtest/gtest.h>
      9 #include <unistd.h>
     10 #include <time.h>
     11 #include <sys/mman.h>
     12 #include <cutils/ashmem.h>
     13 
     14 #include "../../utils/tests/TestHelpers.h"
     15 
     16 namespace android {
     17 
     18 class InputPublisherAndConsumerTest : public testing::Test {
     19 protected:
     20     sp<InputChannel> serverChannel, clientChannel;
     21     InputPublisher* mPublisher;
     22     InputConsumer* mConsumer;
     23     PreallocatedInputEventFactory mEventFactory;
     24 
     25     virtual void SetUp() {
     26         status_t result = InputChannel::openInputChannelPair(String8("channel name"),
     27                 serverChannel, clientChannel);
     28 
     29         mPublisher = new InputPublisher(serverChannel);
     30         mConsumer = new InputConsumer(clientChannel);
     31     }
     32 
     33     virtual void TearDown() {
     34         if (mPublisher) {
     35             delete mPublisher;
     36             mPublisher = NULL;
     37         }
     38 
     39         if (mConsumer) {
     40             delete mConsumer;
     41             mConsumer = NULL;
     42         }
     43 
     44         serverChannel.clear();
     45         clientChannel.clear();
     46     }
     47 
     48     void Initialize();
     49     void PublishAndConsumeKeyEvent();
     50     void PublishAndConsumeMotionEvent(
     51             size_t samplesToAppendBeforeDispatch = 0,
     52             size_t samplesToAppendAfterDispatch = 0);
     53 };
     54 
     55 TEST_F(InputPublisherAndConsumerTest, GetChannel_ReturnsTheChannel) {
     56     EXPECT_EQ(serverChannel.get(), mPublisher->getChannel().get());
     57     EXPECT_EQ(clientChannel.get(), mConsumer->getChannel().get());
     58 }
     59 
     60 void InputPublisherAndConsumerTest::Initialize() {
     61     status_t status;
     62 
     63     status = mPublisher->initialize();
     64     ASSERT_EQ(OK, status)
     65             << "publisher initialize should return OK";
     66 
     67     status = mConsumer->initialize();
     68     ASSERT_EQ(OK, status)
     69             << "consumer initialize should return OK";
     70 }
     71 
     72 void InputPublisherAndConsumerTest::PublishAndConsumeKeyEvent() {
     73     status_t status;
     74 
     75     const int32_t deviceId = 1;
     76     const int32_t source = AINPUT_SOURCE_KEYBOARD;
     77     const int32_t action = AKEY_EVENT_ACTION_DOWN;
     78     const int32_t flags = AKEY_EVENT_FLAG_FROM_SYSTEM;
     79     const int32_t keyCode = AKEYCODE_ENTER;
     80     const int32_t scanCode = 13;
     81     const int32_t metaState = AMETA_ALT_LEFT_ON | AMETA_ALT_ON;
     82     const int32_t repeatCount = 1;
     83     const nsecs_t downTime = 3;
     84     const nsecs_t eventTime = 4;
     85 
     86     status = mPublisher->publishKeyEvent(deviceId, source, action, flags,
     87             keyCode, scanCode, metaState, repeatCount, downTime, eventTime);
     88     ASSERT_EQ(OK, status)
     89             << "publisher publishKeyEvent should return OK";
     90 
     91     status = mPublisher->sendDispatchSignal();
     92     ASSERT_EQ(OK, status)
     93             << "publisher sendDispatchSignal should return OK";
     94 
     95     status = mConsumer->receiveDispatchSignal();
     96     ASSERT_EQ(OK, status)
     97             << "consumer receiveDispatchSignal should return OK";
     98 
     99     InputEvent* event;
    100     status = mConsumer->consume(& mEventFactory, & event);
    101     ASSERT_EQ(OK, status)
    102             << "consumer consume should return OK";
    103 
    104     ASSERT_TRUE(event != NULL)
    105             << "consumer should have returned non-NULL event";
    106     ASSERT_EQ(AINPUT_EVENT_TYPE_KEY, event->getType())
    107             << "consumer should have returned a key event";
    108 
    109     KeyEvent* keyEvent = static_cast<KeyEvent*>(event);
    110     EXPECT_EQ(deviceId, keyEvent->getDeviceId());
    111     EXPECT_EQ(source, keyEvent->getSource());
    112     EXPECT_EQ(action, keyEvent->getAction());
    113     EXPECT_EQ(flags, keyEvent->getFlags());
    114     EXPECT_EQ(keyCode, keyEvent->getKeyCode());
    115     EXPECT_EQ(scanCode, keyEvent->getScanCode());
    116     EXPECT_EQ(metaState, keyEvent->getMetaState());
    117     EXPECT_EQ(repeatCount, keyEvent->getRepeatCount());
    118     EXPECT_EQ(downTime, keyEvent->getDownTime());
    119     EXPECT_EQ(eventTime, keyEvent->getEventTime());
    120 
    121     status = mConsumer->sendFinishedSignal();
    122     ASSERT_EQ(OK, status)
    123             << "consumer sendFinishedSignal should return OK";
    124 
    125     status = mPublisher->receiveFinishedSignal();
    126     ASSERT_EQ(OK, status)
    127             << "publisher receiveFinishedSignal should return OK";
    128 
    129     status = mPublisher->reset();
    130     ASSERT_EQ(OK, status)
    131             << "publisher reset should return OK";
    132 }
    133 
    134 void InputPublisherAndConsumerTest::PublishAndConsumeMotionEvent(
    135         size_t samplesToAppendBeforeDispatch, size_t samplesToAppendAfterDispatch) {
    136     status_t status;
    137 
    138     const int32_t deviceId = 1;
    139     const int32_t source = AINPUT_SOURCE_TOUCHSCREEN;
    140     const int32_t action = AMOTION_EVENT_ACTION_MOVE;
    141     const int32_t flags = AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED;
    142     const int32_t edgeFlags = AMOTION_EVENT_EDGE_FLAG_TOP;
    143     const int32_t metaState = AMETA_ALT_LEFT_ON | AMETA_ALT_ON;
    144     const float xOffset = -10;
    145     const float yOffset = -20;
    146     const float xPrecision = 0.25;
    147     const float yPrecision = 0.5;
    148     const nsecs_t downTime = 3;
    149     const size_t pointerCount = 3;
    150     const int32_t pointerIds[pointerCount] = { 2, 0, 1 };
    151 
    152     Vector<nsecs_t> sampleEventTimes;
    153     Vector<PointerCoords> samplePointerCoords;
    154 
    155     for (size_t i = 0; i <= samplesToAppendAfterDispatch + samplesToAppendBeforeDispatch; i++) {
    156         sampleEventTimes.push(i + 10);
    157         for (size_t j = 0; j < pointerCount; j++) {
    158             samplePointerCoords.push();
    159             samplePointerCoords.editTop().x = 100 * i + j;
    160             samplePointerCoords.editTop().y = 200 * i + j;
    161             samplePointerCoords.editTop().pressure = 0.5 * i + j;
    162             samplePointerCoords.editTop().size = 0.7 * i + j;
    163             samplePointerCoords.editTop().touchMajor = 1.5 * i + j;
    164             samplePointerCoords.editTop().touchMinor = 1.7 * i + j;
    165             samplePointerCoords.editTop().toolMajor = 2.5 * i + j;
    166             samplePointerCoords.editTop().toolMinor = 2.7 * i + j;
    167             samplePointerCoords.editTop().orientation = 3.5 * i + j;
    168         }
    169     }
    170 
    171     status = mPublisher->publishMotionEvent(deviceId, source, action, flags, edgeFlags,
    172             metaState, xOffset, yOffset, xPrecision, yPrecision,
    173             downTime, sampleEventTimes[0], pointerCount, pointerIds, samplePointerCoords.array());
    174     ASSERT_EQ(OK, status)
    175             << "publisher publishMotionEvent should return OK";
    176 
    177     for (size_t i = 0; i < samplesToAppendBeforeDispatch; i++) {
    178         size_t sampleIndex = i + 1;
    179         status = mPublisher->appendMotionSample(sampleEventTimes[sampleIndex],
    180                 samplePointerCoords.array() + sampleIndex * pointerCount);
    181         ASSERT_EQ(OK, status)
    182                 << "publisher appendMotionEvent should return OK";
    183     }
    184 
    185     status = mPublisher->sendDispatchSignal();
    186     ASSERT_EQ(OK, status)
    187             << "publisher sendDispatchSignal should return OK";
    188 
    189     for (size_t i = 0; i < samplesToAppendAfterDispatch; i++) {
    190         size_t sampleIndex = i + 1 + samplesToAppendBeforeDispatch;
    191         status = mPublisher->appendMotionSample(sampleEventTimes[sampleIndex],
    192                 samplePointerCoords.array() + sampleIndex * pointerCount);
    193         ASSERT_EQ(OK, status)
    194                 << "publisher appendMotionEvent should return OK";
    195     }
    196 
    197     status = mConsumer->receiveDispatchSignal();
    198     ASSERT_EQ(OK, status)
    199             << "consumer receiveDispatchSignal should return OK";
    200 
    201     InputEvent* event;
    202     status = mConsumer->consume(& mEventFactory, & event);
    203     ASSERT_EQ(OK, status)
    204             << "consumer consume should return OK";
    205 
    206     ASSERT_TRUE(event != NULL)
    207             << "consumer should have returned non-NULL event";
    208     ASSERT_EQ(AINPUT_EVENT_TYPE_MOTION, event->getType())
    209             << "consumer should have returned a motion event";
    210 
    211     size_t lastSampleIndex = samplesToAppendBeforeDispatch + samplesToAppendAfterDispatch;
    212 
    213     MotionEvent* motionEvent = static_cast<MotionEvent*>(event);
    214     EXPECT_EQ(deviceId, motionEvent->getDeviceId());
    215     EXPECT_EQ(source, motionEvent->getSource());
    216     EXPECT_EQ(action, motionEvent->getAction());
    217     EXPECT_EQ(flags, motionEvent->getFlags());
    218     EXPECT_EQ(edgeFlags, motionEvent->getEdgeFlags());
    219     EXPECT_EQ(metaState, motionEvent->getMetaState());
    220     EXPECT_EQ(xPrecision, motionEvent->getXPrecision());
    221     EXPECT_EQ(yPrecision, motionEvent->getYPrecision());
    222     EXPECT_EQ(downTime, motionEvent->getDownTime());
    223     EXPECT_EQ(sampleEventTimes[lastSampleIndex], motionEvent->getEventTime());
    224     EXPECT_EQ(pointerCount, motionEvent->getPointerCount());
    225     EXPECT_EQ(lastSampleIndex, motionEvent->getHistorySize());
    226 
    227     for (size_t i = 0; i < pointerCount; i++) {
    228         SCOPED_TRACE(i);
    229         EXPECT_EQ(pointerIds[i], motionEvent->getPointerId(i));
    230     }
    231 
    232     for (size_t sampleIndex = 0; sampleIndex < lastSampleIndex; sampleIndex++) {
    233         SCOPED_TRACE(sampleIndex);
    234         EXPECT_EQ(sampleEventTimes[sampleIndex],
    235                 motionEvent->getHistoricalEventTime(sampleIndex));
    236         for (size_t i = 0; i < pointerCount; i++) {
    237             SCOPED_TRACE(i);
    238             size_t offset = sampleIndex * pointerCount + i;
    239             EXPECT_EQ(samplePointerCoords[offset].x,
    240                     motionEvent->getHistoricalRawX(i, sampleIndex));
    241             EXPECT_EQ(samplePointerCoords[offset].y,
    242                     motionEvent->getHistoricalRawY(i, sampleIndex));
    243             EXPECT_EQ(samplePointerCoords[offset].x + xOffset,
    244                     motionEvent->getHistoricalX(i, sampleIndex));
    245             EXPECT_EQ(samplePointerCoords[offset].y + yOffset,
    246                     motionEvent->getHistoricalY(i, sampleIndex));
    247             EXPECT_EQ(samplePointerCoords[offset].pressure,
    248                     motionEvent->getHistoricalPressure(i, sampleIndex));
    249             EXPECT_EQ(samplePointerCoords[offset].size,
    250                     motionEvent->getHistoricalSize(i, sampleIndex));
    251             EXPECT_EQ(samplePointerCoords[offset].touchMajor,
    252                     motionEvent->getHistoricalTouchMajor(i, sampleIndex));
    253             EXPECT_EQ(samplePointerCoords[offset].touchMinor,
    254                     motionEvent->getHistoricalTouchMinor(i, sampleIndex));
    255             EXPECT_EQ(samplePointerCoords[offset].toolMajor,
    256                     motionEvent->getHistoricalToolMajor(i, sampleIndex));
    257             EXPECT_EQ(samplePointerCoords[offset].toolMinor,
    258                     motionEvent->getHistoricalToolMinor(i, sampleIndex));
    259             EXPECT_EQ(samplePointerCoords[offset].orientation,
    260                     motionEvent->getHistoricalOrientation(i, sampleIndex));
    261         }
    262     }
    263 
    264     SCOPED_TRACE(lastSampleIndex);
    265     EXPECT_EQ(sampleEventTimes[lastSampleIndex], motionEvent->getEventTime());
    266     for (size_t i = 0; i < pointerCount; i++) {
    267         SCOPED_TRACE(i);
    268         size_t offset = lastSampleIndex * pointerCount + i;
    269         EXPECT_EQ(samplePointerCoords[offset].x, motionEvent->getRawX(i));
    270         EXPECT_EQ(samplePointerCoords[offset].y, motionEvent->getRawY(i));
    271         EXPECT_EQ(samplePointerCoords[offset].x + xOffset, motionEvent->getX(i));
    272         EXPECT_EQ(samplePointerCoords[offset].y + yOffset, motionEvent->getY(i));
    273         EXPECT_EQ(samplePointerCoords[offset].pressure, motionEvent->getPressure(i));
    274         EXPECT_EQ(samplePointerCoords[offset].size, motionEvent->getSize(i));
    275         EXPECT_EQ(samplePointerCoords[offset].touchMajor, motionEvent->getTouchMajor(i));
    276         EXPECT_EQ(samplePointerCoords[offset].touchMinor, motionEvent->getTouchMinor(i));
    277         EXPECT_EQ(samplePointerCoords[offset].toolMajor, motionEvent->getToolMajor(i));
    278         EXPECT_EQ(samplePointerCoords[offset].toolMinor, motionEvent->getToolMinor(i));
    279         EXPECT_EQ(samplePointerCoords[offset].orientation, motionEvent->getOrientation(i));
    280     }
    281 
    282     status = mConsumer->sendFinishedSignal();
    283     ASSERT_EQ(OK, status)
    284             << "consumer sendFinishedSignal should return OK";
    285 
    286     status = mPublisher->receiveFinishedSignal();
    287     ASSERT_EQ(OK, status)
    288             << "publisher receiveFinishedSignal should return OK";
    289 
    290     status = mPublisher->reset();
    291     ASSERT_EQ(OK, status)
    292             << "publisher reset should return OK";
    293 }
    294 
    295 TEST_F(InputPublisherAndConsumerTest, PublishKeyEvent_EndToEnd) {
    296     ASSERT_NO_FATAL_FAILURE(Initialize());
    297     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
    298 }
    299 
    300 TEST_F(InputPublisherAndConsumerTest, PublishKeyEvent_WhenNotReset_ReturnsError) {
    301     status_t status;
    302     ASSERT_NO_FATAL_FAILURE(Initialize());
    303 
    304     status = mPublisher->publishKeyEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    305     ASSERT_EQ(OK, status)
    306             << "publisher publishKeyEvent should return OK first time";
    307 
    308     status = mPublisher->publishKeyEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    309     ASSERT_EQ(INVALID_OPERATION, status)
    310             << "publisher publishKeyEvent should return INVALID_OPERATION because "
    311                     "the publisher was not reset";
    312 }
    313 
    314 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_EndToEnd) {
    315     ASSERT_NO_FATAL_FAILURE(Initialize());
    316     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
    317 }
    318 
    319 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenNotReset_ReturnsError) {
    320     status_t status;
    321     ASSERT_NO_FATAL_FAILURE(Initialize());
    322 
    323     const size_t pointerCount = 1;
    324     int32_t pointerIds[pointerCount] = { 0 };
    325     PointerCoords pointerCoords[pointerCount] = { { 0, 0, 0, 0, 0, 0, 0, 0, 0 } };
    326 
    327     status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    328             pointerCount, pointerIds, pointerCoords);
    329     ASSERT_EQ(OK, status)
    330             << "publisher publishMotionEvent should return OK";
    331 
    332     status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    333             pointerCount, pointerIds, pointerCoords);
    334     ASSERT_EQ(INVALID_OPERATION, status)
    335             << "publisher publishMotionEvent should return INVALID_OPERATION because ";
    336                     "the publisher was not reset";
    337 }
    338 
    339 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenPointerCountLessThan1_ReturnsError) {
    340     status_t status;
    341     ASSERT_NO_FATAL_FAILURE(Initialize());
    342 
    343     const size_t pointerCount = 0;
    344     int32_t pointerIds[pointerCount];
    345     PointerCoords pointerCoords[pointerCount];
    346 
    347     status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    348             pointerCount, pointerIds, pointerCoords);
    349     ASSERT_EQ(BAD_VALUE, status)
    350             << "publisher publishMotionEvent should return BAD_VALUE";
    351 }
    352 
    353 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenPointerCountGreaterThanMax_ReturnsError) {
    354     status_t status;
    355     ASSERT_NO_FATAL_FAILURE(Initialize());
    356 
    357     const size_t pointerCount = MAX_POINTERS + 1;
    358     int32_t pointerIds[pointerCount];
    359     PointerCoords pointerCoords[pointerCount];
    360 
    361     status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    362             pointerCount, pointerIds, pointerCoords);
    363     ASSERT_EQ(BAD_VALUE, status)
    364             << "publisher publishMotionEvent should return BAD_VALUE";
    365 }
    366 
    367 TEST_F(InputPublisherAndConsumerTest, PublishMultipleEvents_EndToEnd) {
    368     ASSERT_NO_FATAL_FAILURE(Initialize());
    369     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
    370     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
    371     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
    372     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
    373     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
    374 }
    375 
    376 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenCalledBeforeDispatchSignal_AppendsSamples) {
    377     status_t status;
    378     ASSERT_NO_FATAL_FAILURE(Initialize());
    379     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent(3, 0));
    380 }
    381 
    382 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenCalledAfterDispatchSignalAndNotConsumed_AppendsSamples) {
    383     status_t status;
    384     ASSERT_NO_FATAL_FAILURE(Initialize());
    385     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent(0, 4));
    386 }
    387 
    388 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenNoMotionEventPublished_ReturnsError) {
    389     status_t status;
    390     ASSERT_NO_FATAL_FAILURE(Initialize());
    391 
    392     PointerCoords pointerCoords[1];
    393     status = mPublisher->appendMotionSample(0, pointerCoords);
    394     ASSERT_EQ(INVALID_OPERATION, status)
    395             << "publisher appendMotionSample should return INVALID_OPERATION";
    396 }
    397 
    398 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenPublishedMotionEventIsNotAMove_ReturnsError) {
    399     status_t status;
    400     ASSERT_NO_FATAL_FAILURE(Initialize());
    401 
    402     const size_t pointerCount = MAX_POINTERS;
    403     int32_t pointerIds[pointerCount];
    404     PointerCoords pointerCoords[pointerCount];
    405 
    406     status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_DOWN,
    407             0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerIds, pointerCoords);
    408     ASSERT_EQ(OK, status);
    409 
    410     status = mPublisher->appendMotionSample(0, pointerCoords);
    411     ASSERT_EQ(INVALID_OPERATION, status)
    412             << "publisher appendMotionSample should return INVALID_OPERATION";
    413 }
    414 
    415 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenAlreadyConsumed_ReturnsError) {
    416     status_t status;
    417     ASSERT_NO_FATAL_FAILURE(Initialize());
    418 
    419     const size_t pointerCount = MAX_POINTERS;
    420     int32_t pointerIds[pointerCount];
    421     PointerCoords pointerCoords[pointerCount];
    422 
    423     status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_MOVE,
    424             0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerIds, pointerCoords);
    425     ASSERT_EQ(OK, status);
    426 
    427     status = mPublisher->sendDispatchSignal();
    428     ASSERT_EQ(OK, status);
    429 
    430     status = mConsumer->receiveDispatchSignal();
    431     ASSERT_EQ(OK, status);
    432 
    433     InputEvent* event;
    434     status = mConsumer->consume(& mEventFactory, & event);
    435     ASSERT_EQ(OK, status);
    436 
    437     status = mPublisher->appendMotionSample(0, pointerCoords);
    438     ASSERT_EQ(status_t(FAILED_TRANSACTION), status)
    439             << "publisher appendMotionSample should return FAILED_TRANSACTION";
    440 }
    441 
    442 TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenBufferFull_ReturnsError) {
    443     status_t status;
    444     ASSERT_NO_FATAL_FAILURE(Initialize());
    445 
    446     const size_t pointerCount = MAX_POINTERS;
    447     int32_t pointerIds[pointerCount];
    448     PointerCoords pointerCoords[pointerCount];
    449 
    450     status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_MOVE,
    451             0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerIds, pointerCoords);
    452     ASSERT_EQ(OK, status);
    453 
    454     for (int count = 1;; count++) {
    455         ASSERT_LT(count, 100000) << "should eventually reach OOM";
    456 
    457         status = mPublisher->appendMotionSample(0, pointerCoords);
    458         if (status != OK) {
    459             ASSERT_GT(count, 12) << "should be able to add at least a dozen samples";
    460             ASSERT_EQ(NO_MEMORY, status)
    461                     << "publisher appendMotionSample should return NO_MEMORY when buffer is full";
    462             break;
    463         }
    464     }
    465 
    466     status = mPublisher->appendMotionSample(0, pointerCoords);
    467     ASSERT_EQ(NO_MEMORY, status)
    468             << "publisher appendMotionSample should return NO_MEMORY persistently until reset";
    469 }
    470 
    471 } // namespace android
    472