1
我想利用加速度传感器的最大FIFO大小在Nexus 6利用传感器配料
SensorManager sensorManager =
(SensorManager) getSystemService(Context.SENSOR_SERVICE);
Sensor sensor = sensorManager.getDefaultSensor(typeAccelerometer);
Log.e("test",
"Max delay: " + sensor.getMaxDelay() + " - Fifo count" + sensor.getFifoReservedEventCount()); // prints 1000000 (1 second) - Fifo count 10000
// Register the listener for this sensor in batch mode.
// Following code reports every 190ms when screen is ON, and every 10 seconds when screen is OFF. I always want every 10 seconds.
final boolean batchMode = sensorManager.registerListener(
mListener, sensor, 1000000 /* 1 second */, 10000000 /* 10 seconds */);
private final SensorEventListener mListener = new SensorEventListener() {
long lastTimeStamp;
@Override
public void onSensorChanged(SensorEvent event) {
long current = System.currentTimeMillis();
long time = current - lastTimeStamp;
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
Log.e("test",
"New ACCELERO "+ " -> "+ time + "ms -> " + (int)event.values[0] + " -> "+ (int)event.values[1] +" -> "+ (int)event.values[2]);
lastTimeStamp = current;
}
}
@Override
public void onAccuracyChanged(Sensor s, int accuracy) {
}
};
当屏幕打开，我得到的事件每190ms。但是，当屏幕关闭时，它会服从10秒。
当屏幕处于开启状态时，如何利用完整批处理FIFO（带有延迟侦听器），以最小化CPU影响。