sensorservicetest.cpp revision fc32881fcc68640d008c7515cdd1bcd866f72cd5 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <android/sensor.h>
18#include <gui/Sensor.h>
19#include <gui/SensorManager.h>
20#include <gui/SensorEventQueue.h>
21#include <utils/PollLoop.h>
22
23using namespace android;
24
25bool receiver(int fd, int events, void* data)
26{
27    sp<SensorEventQueue> q((SensorEventQueue*)data);
28    ssize_t n;
29    ASensorEvent buffer[8];
30    while ((n = q->read(buffer, 8)) > 0) {
31        for (int i=0 ; i<n ; i++) {
32            if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
33                printf("time=%lld, value=<%5.1f,%5.1f,%5.1f>\n",
34                        buffer[i].timestamp,
35                        buffer[i].acceleration.x,
36                        buffer[i].acceleration.y,
37                        buffer[i].acceleration.z);
38            }
39        }
40    }
41    if (n<0 && n != -EAGAIN) {
42        printf("error reading events (%s)\n", strerror(-n));
43    }
44    return true;
45}
46
47
48int main(int argc, char** argv)
49{
50    SensorManager& mgr(SensorManager::getInstance());
51
52    Sensor const* const* list;
53    ssize_t count = mgr.getSensorList(&list);
54    printf("numSensors=%d\n", count);
55
56    sp<SensorEventQueue> q = mgr.createEventQueue();
57    printf("queue=%p\n", q.get());
58
59    Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
60    printf("accelerometer=%p (%s)\n",
61            accelerometer, accelerometer->getName().string());
62    q->enableSensor(accelerometer);
63
64    q->setEventRate(accelerometer, ms2ns(10));
65
66    sp<PollLoop> loop = new PollLoop(false);
67    loop->setCallback(q->getFd(), POLLIN, receiver, q.get());
68
69    do {
70        //printf("about to poll...\n");
71        int32_t ret = loop->pollOnce(-1, 0, 0);
72        switch (ret) {
73            case ALOOPER_POLL_CALLBACK:
74                //("ALOOPER_POLL_CALLBACK\n");
75                break;
76            case ALOOPER_POLL_TIMEOUT:
77                printf("ALOOPER_POLL_TIMEOUT\n");
78                break;
79            case ALOOPER_POLL_ERROR:
80                printf("ALOOPER_POLL_TIMEOUT\n");
81                break;
82            default:
83                printf("ugh? poll returned %d\n", ret);
84                break;
85        }
86    } while (1);
87
88
89    return 0;
90}
91