Question

我完全输了！对我来说，这段代码是完美的...但是唉 - 没有System.out的！??！

是的，我有一个加速度计：）

public class MainActivity extends Activity implements SensorEventListener
{
private final static String CLASS_NAME = "(MainActivity)";
private SensorManager m_oSensorManager;
private Sensor m_oAccelerometer;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    m_oSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

    m_oAccelerometer = m_oSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

    m_oSensorManager.registerListener(this, m_oAccelerometer,SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {

}

@Override
public void onSensorChanged(SensorEvent arg0) {
    System.out.println(CLASS_NAME + " onSensorChanged()");
}

}

忽略这些行.....避免堆栈溢出过滤器.....

Answer 1

尝试

Log.i(CLASS_NAME, "onSensorChanged()");

Answer 2

处理程序寄存器调用必须在onResume（）中。我确定我已经尝试过了，所以这可能是我的手机弄乱了我的大脑。但无论如何，对于其他人......

@Override
public void onResume()
{
    super.onResume();
    m_oSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
    m_oAccelerometer = m_oSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    m_oMagnetometer = m_oSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);

    m_oSensorManager.registerListener(this, m_oAccelerometer,SensorManager.SENSOR_DELAY_NORMAL);
    m_oSensorManager.registerListener(this, m_oMagnetometer,SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
public void onPause()
{
    super.onPause();
    m_oSensorManager.unregisterListener(this);
}

Android Sensors突然无法正常工作

2 个答案: