Question

在15560ae型号的“WIKO Highway Star”上，从加速度计和磁传感器获取数据时遇到问题。

调用SensorManager.getSensorList()，加速度计的最短延迟为10ms，磁性为100ms。

我注册了这两个传感器：

Sensor sensorAccelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(this, sensorAccelerometer, 20000);

Sensor sensorMagneticField = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
sensorManager.registerListener(this, sensorMagneticField, 20000);

每20000微秒接收传感器数据= 20ms。

但它发生了一些非常奇怪的事情。当我记录收到的延迟和数据时：

@Override
public void onSensorChanged(SensorEvent event) {

    long now = Calendar.getInstance().getTimeInMillis();

    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
       Log("acc: time = " + time + 
           ", delay = " + (now - lastSensorAcc) + "ms" + 
           ", values = " + arrayToString(event.values));

       lastSensorAcc = now;
    }

    if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
       Log("mag: time = " + time + 
           ", delay = " + (now - lastSensorMag) + "ms" + 
           ", values = " + arrayToString(event.values));

       lastSensorMag = now;
    }


}

我得到了这个输出：

Accelerometer values in log:

acc: time = 21:30:13.556, delay = 84ms, values = -0,41 5,12 8,65
acc: time = 21:30:13.559, delay =  3ms, values = -0,41 5,12 8,65
acc: time = 21:30:13.560, delay =  1ms, values = -0,41 5,12 8,65
acc: time = 21:30:13.561, delay =  1ms, values = -0,41 5,12 8,65
acc: time = 21:30:13.562, delay =  1ms, values = -0,41 5,12 8,65
acc: time = 21:30:13.646, delay = 84ms, values = -0,58 5,05 8,74
acc: time = 21:30:13.649, delay =  3ms, values = -0,58 5,05 8,74
acc: time = 21:30:13.650, delay =  1ms, values = -0,58 5,05 8,74
acc: time = 21:30:13.651, delay =  1ms, values = -0,58 5,05 8,74
acc: time = 21:30:13.652, delay =  1ms, values = -0,58 5,05 8,74

Magnetic field values in log:

mag: time = 21:30:15.845, delay = 100ms, values = 12,60 -37,98 -23,34
mag: time = 21:30:15.846, delay =   1ms, values = 12,60 -37,98 -23,34
mag: time = 21:30:15.944, delay =  99ms, values = 12,00 -37,68 -23,76
mag: time = 21:30:16.045, delay = 100ms, values = 12,00 -37,68 -23,76
mag: time = 21:30:16.047, delay =   3ms, values = 12,00 -37,68 -23,76
mag: time = 21:30:16.145, delay =  97ms, values = 10,92 -37,62 -23,94
mag: time = 21:30:16.147, delay =   2ms, values = 10,92 -37,62 -23,94
mag: time = 21:30:16.246, delay = 100ms, values = 9,84 -37,80 -23,64
mag: time = 21:30:16.248, delay =   2ms, values = 9,84 -37,80 -23,64
mag: time = 21:30:16.345, delay =  96ms, values = 8,34 -38,46 -22,38

如您所见，重复这些值。

新的acc值每80-90毫秒递送一次（我要求每20毫秒!!），重复值之间（为什么，我不需要它们！）。

每100毫秒传递一次新的磁力值（这正是我所期望的），但为什么在1-3毫秒后再次出现相同的值？

我的其他智能手机（Galaxy Alpha，Galaxy SII，Nexus 7，Galaxy A3，Sony Experia XA，Asus Memopad 10）都没有所描述的问题。

传感器数据传输两次且太慢

0 个答案: