我正在尝试使用accelerometer从面朝下（左，右，右上，上下）四个不同角度检测flipping手机，以及是否快速完成或慢。我还希望在手机flipping大约30度后停止检查。
我的问题是获得一些稳定性。它偶尔会工作，然后无法正常工作。
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
}
@Override
protected void onResume() {
super.onResume();
...
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_UI);
}
@Override
public void onSensorChanged(SensorEvent event) {
preTS = TS;
preX = X;
preY = Y;
preZ = Z;
realX = event.values[0];
realY = event.values[1];
realZ = event.values[2];
X = Math.abs(event.values[0]);
Y = Math.abs(event.values[1]);
Z = Math.abs(event.values[2]);
TS = event.timestamp;
if (X < 2 && Y < 1) {
npsX = ((TS - preTS) * Math.abs(X - preX)) / 100000;
npsY = ((TS - preTS) * Math.abs(Y - preY)) / 100000;
npsZ = ((TS - preTS) * Math.abs(Z - preZ)) / 100000;
}
maxX = (maxX > npsX) ? maxX : npsX;
maxY = (maxY > npsY) ? maxY : npsY;
maxZ = (maxZ > npsZ) ? maxZ : npsZ;
if(X < 1 && Y < 1 && Z > 9) {
maxX = 0;
maxY = 0;
maxZ = 0;
dir = "";
speed = "";
}
if (Objects.equals(dir, "") || Objects.equals(speed, "")) {
if (realX >= 2) {
dir = "left";
} else if (realX <= -2) {
dir = "right";
} else if (realY >= 2) {
dir = "up";
} else if (realY <= -2) {
dir = "down";
}
if (maxX > 250 || maxY > 250 || maxZ > 250)
speed = "fast";
else
speed = "slow";
}
Log.i("MA", (int) maxX + " " + (int) maxY + " " + (int) maxZ + " " + X + " " + Y + " " +
Z + " " + speed + " " + dir + " " + realX + " " + realY + " " + realZ);
}