加速度计：摇动 phone 检测器

Question

我一直在使用这段代码 Android: I want to shake it 来实现抖动检测器。但实际上当我在我的智能手机上运行它时，它什么也没做。我尝试使用断点来检查，但它永远不会进入 if (mAccel > 12)。我试着用力摇晃它，但还是认不出来。我认为它需要一些许可，所以我将这一行添加到 Manifest:

<uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" />

我在 galaxy s3 和 OnePlus One 上试过了，我忘记了什么？

EspecificExerciseActivity.java

public class EspecificoExercicio extends Activity {

    private ArrayList<Exercicio> listaExercicios;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_especifico_exercicio);

        /* do this in onCreate */
        mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
        mAccel = 0.00f;
        mAccelCurrent = SensorManager.GRAVITY_EARTH;
        mAccelLast = SensorManager.GRAVITY_EARTH;

        if (mAccel > 12) {
            Toast toast1 = Toast.makeText(getApplicationContext(), "Device has shaken.", Toast.LENGTH_LONG);
            toast1.show();
        }
    }

      /* put this into your activity class */
      private SensorManager mSensorManager;
      private float mAccel; // acceleration apart from gravity
      private float mAccelCurrent; // current acceleration including gravity
      private float mAccelLast; // last acceleration including gravity

      private final SensorEventListener mSensorListener = new SensorEventListener() {

        public void onSensorChanged(SensorEvent se) {
          float x = se.values[0];
          float y = se.values[1];
          float z = se.values[2];
          mAccelLast = mAccelCurrent;
          mAccelCurrent = (float) Math.sqrt((double) (x*x + y*y + z*z));
          float delta = mAccelCurrent - mAccelLast;
          mAccel = mAccel * 0.9f + delta; // perform low-cut filter
        }

        public void onAccuracyChanged(Sensor sensor, int accuracy) {
            if (mAccel > 4) {
                Toast toast1 = Toast.makeText(getApplicationContext(), "DevSSDAASSADA", Toast.LENGTH_LONG);
                toast1.show();
            }
        }


      };

      @Override
      protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);

      }

      @Override
      protected void onPause() {
        mSensorManager.unregisterListener(mSensorListener);
        super.onPause();
      }

}

Answer 1

您正在检查您的 onCreate() 中的 if (mAccel > 12)。将支票移动到 onSensorChanged().

加速度计：摇动 phone 检测器

Acelerometer: shake the phone detector

android

accelerometer