1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* Copyright (C) 2010 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.
*/
#include <android/sensor.h>
#include <gui/Sensor.h>
#include <gui/SensorManager.h>
#include <gui/SensorEventQueue.h>
#include <utils/PollLoop.h>
using namespace android;
bool receiver(int fd, int events, void* data)
{
sp<SensorEventQueue> q((SensorEventQueue*)data);
ssize_t n;
ASensorEvent buffer[8];
while ((n = q->read(buffer, 8)) > 0) {
for (int i=0 ; i<n ; i++) {
if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
printf("time=%lld, value=<%5.1f,%5.1f,%5.1f>\n",
buffer[i].timestamp,
buffer[i].acceleration.x,
buffer[i].acceleration.y,
buffer[i].acceleration.z);
}
}
}
if (n<0 && n != -EAGAIN) {
printf("error reading events (%s)\n", strerror(-n));
}
return true;
}
int main(int argc, char** argv)
{
SensorManager& mgr(SensorManager::getInstance());
Sensor const* const* list;
ssize_t count = mgr.getSensorList(&list);
printf("numSensors=%d\n", count);
sp<SensorEventQueue> q = mgr.createEventQueue();
printf("queue=%p\n", q.get());
Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
printf("accelerometer=%p (%s)\n",
accelerometer, accelerometer->getName().string());
q->enableSensor(accelerometer);
q->setEventRate(accelerometer, ms2ns(10));
sp<PollLoop> loop = new PollLoop(false);
loop->setCallback(q->getFd(), POLLIN, receiver, q.get());
do {
//printf("about to poll...\n");
int32_t ret = loop->pollOnce(-1, 0, 0);
switch (ret) {
case ALOOPER_POLL_CALLBACK:
//("ALOOPER_POLL_CALLBACK\n");
break;
case ALOOPER_POLL_TIMEOUT:
printf("ALOOPER_POLL_TIMEOUT\n");
break;
case ALOOPER_POLL_ERROR:
printf("ALOOPER_POLL_TIMEOUT\n");
break;
default:
printf("ugh? poll returned %d\n", ret);
break;
}
} while (1);
return 0;
}
|
