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我正在研究使用传感器的应用程序。 我将有机会按照给定的顺序在控制台中显示传感器数据。首先,我得到并查看来自加速度计的数据,下一个磁力计数据。 目前,数据随机显示。一旦加速计,一旦磁力计。有时他们出现两次。如何顺序获取传感器数据?
这里是我的代码:
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) {}
如何使我的方法异步?一些有价值的技巧 – phoenix37
我想你可以在onSensorChanged方法中添加一些if(),它调用不同的方法来显示不同的传感器数据,具体取决于接收的传感器数据。你*是否必须*必须按照该顺序显示信息? –
是的,因为接下来我会将数据存储在数据库中。我希望获得更多的结构:来自加速度计的一行数据,来自磁力计的第二行数据等。 – phoenix37