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我正在研究使用傳感器的應用程序。 我將有機會按照給定的順序在控制檯中顯示傳感器數據。首先,我得到並查看來自加速度計的數據,下一個磁力計數據。 目前,數據隨機顯示。一旦加速計,一旦磁力計。有時他們出現兩次。如何順序獲取傳感器數據?
這裏是我的代碼:
public class StartFragment extends Fragment implements SensorEventListener {
private SensorManager sensorManager;
private Sensor accelerometer;
private Sensor magnetic;
private static final int PERIOD = 10000;
private Handler handler;
boolean flag = false;
private final Runnable processSensors = new Runnable() {
@Override
public void run() {
sensorManager.registerListener(StartFragment.this, accelerometer, SensorManager.SENSOR_DELAY_UI);
sensorManager.registerListener(StartFragment.this, magnetic, SensorManager.SENSOR_DELAY_UI);
flag = true;
handler.postDelayed(this, PERIOD);
}
};
public StartFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_start, container, false);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
handler = new Handler();
sensorManager = (SensorManager) getActivity().getSystemService(Context.SENSOR_SERVICE);
accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
magnetic = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
}
@Override
public void onResume() {
super.onResume();
handler.post(processSensors);
}
@Override
public void onPause() {
super.onPause();
handler.removeCallbacks(processSensors);
sensorManager.unregisterListener(this, accelerometer);
sensorManager.unregisterListener(this, magnetic);
}
@Override
public void onSensorChanged(SensorEvent sensorEvent) {
float[] value = sensorEvent.values;
if (flag) {
Log.d("Current sensor: ", sensorEvent.sensor.getName() + " x: " + Float.toString(value[0]));
Log.d("Current sensor: ", sensorEvent.sensor.getName() + " y: " + Float.toString(value[1]));
Log.d("Current sensor: ", sensorEvent.sensor.getName() + " z: " + Float.toString(value[2]));
flag = false;
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int i) {}
如何使我的方法異步?一些有價值的技巧 – phoenix37
我想你可以在onSensorChanged方法中添加一些if(),它調用不同的方法來顯示不同的傳感器數據,具體取決於接收的傳感器數據。你*是否必須*必須按照該順序顯示信息? –
是的,因爲接下來我會將數據存儲在數據庫中。我希望獲得更多的結構:來自加速度計的一行數據,來自磁力計的第二行數據等。 – phoenix37