Comment détecter un événement de tremblement avec Android?

Comment puis-je détecter un événement Shake avec Android? Comment puis-je détecter la direction de l'agitation?

Je souhaite modifier l'image dans une vue d'image en cas de tremblement.

Du point de vue du code, vous devez implémenter le SensorListener:

public class ShakeActivity extends Activity implements SensorListener

Vous devrez acquérir un SensorManager:

sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);

Et enregistrez ce capteur avec les drapeaux souhaités:

sensorMgr.registerListener(this,
SensorManager.SENSOR_ACCELEROMETER,
SensorManager.SENSOR_DELAY_GAME);

Dans votre méthode onSensorChange (), vous déterminez s'il s'agit d'un shake ou non:

public void onSensorChanged(int sensor, float[] values) {
  if (sensor == SensorManager.SENSOR_ACCELEROMETER) {
    long curTime = System.currentTimeMillis();
    // only allow one update every 100ms.
    if ((curTime - lastUpdate) > 100) {
      long diffTime = (curTime - lastUpdate);
      lastUpdate = curTime;

      x = values[SensorManager.DATA_X];
      y = values[SensorManager.DATA_Y];
      z = values[SensorManager.DATA_Z];

      float speed = Math.abs(x+y+z - last_x - last_y - last_z) / diffTime * 10000;

      if (speed > SHAKE_THRESHOLD) {
        Log.d("sensor", "shake detected w/ speed: " + speed);
        Toast.makeText(this, "shake detected w/ speed: " + speed, Toast.LENGTH_SHORT).show();
      }
      last_x = x;
      last_y = y;
      last_z = z;
    }
  }
}

Le seuil d'agitation est défini comme:

private static final int SHAKE_THRESHOLD = 800;

Il existe également d'autres méthodes pour détecter les mouvements de secousse. regardez ce lien. (Si ce lien ne fonctionne pas ou si le lien est mort, consultez cette archive Web .).

Jetez un œil à cet exemple pour l'auditeur de détection de secousse Android.

Remarque: SensorListener est obsolète. nous pouvons utiliser à la SensorEventListenerplace. Voici un exemple rapide utilisant SensorEventListener.

Merci.

Google aide beaucoup .

/* The following code was written by Matthew Wiggins
 * and is released under the APACHE 2.0 license
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 */
package com.hlidskialf.android.hardware;

import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.content.Context;
import java.lang.UnsupportedOperationException;

public class ShakeListener implements SensorListener 
{
  private static final int FORCE_THRESHOLD = 350;
  private static final int TIME_THRESHOLD = 100;
  private static final int SHAKE_TIMEOUT = 500;
  private static final int SHAKE_DURATION = 1000;
  private static final int SHAKE_COUNT = 3;

  private SensorManager mSensorMgr;
  private float mLastX=-1.0f, mLastY=-1.0f, mLastZ=-1.0f;
  private long mLastTime;
  private OnShakeListener mShakeListener;
  private Context mContext;
  private int mShakeCount = 0;
  private long mLastShake;
  private long mLastForce;

  public interface OnShakeListener
  {
    public void onShake();
  }

  public ShakeListener(Context context) 
  { 
    mContext = context;
    resume();
  }

  public void setOnShakeListener(OnShakeListener listener)
  {
    mShakeListener = listener;
  }

  public void resume() {
    mSensorMgr = (SensorManager)mContext.getSystemService(Context.SENSOR_SERVICE);
    if (mSensorMgr == null) {
      throw new UnsupportedOperationException("Sensors not supported");
    }
    boolean supported = mSensorMgr.registerListener(this, SensorManager.SENSOR_ACCELEROMETER, SensorManager.SENSOR_DELAY_GAME);
    if (!supported) {
      mSensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER);
      throw new UnsupportedOperationException("Accelerometer not supported");
    }
  }

  public void pause() {
    if (mSensorMgr != null) {
      mSensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER);
      mSensorMgr = null;
    }
  }

  public void onAccuracyChanged(int sensor, int accuracy) { }

  public void onSensorChanged(int sensor, float[] values) 
  {
    if (sensor != SensorManager.SENSOR_ACCELEROMETER) return;
    long now = System.currentTimeMillis();

    if ((now - mLastForce) > SHAKE_TIMEOUT) {
      mShakeCount = 0;
    }

    if ((now - mLastTime) > TIME_THRESHOLD) {
      long diff = now - mLastTime;
      float speed = Math.abs(values[SensorManager.DATA_X] + values[SensorManager.DATA_Y] + values[SensorManager.DATA_Z] - mLastX - mLastY - mLastZ) / diff * 10000;
      if (speed > FORCE_THRESHOLD) {
        if ((++mShakeCount >= SHAKE_COUNT) && (now - mLastShake > SHAKE_DURATION)) {
          mLastShake = now;
          mShakeCount = 0;
          if (mShakeListener != null) { 
            mShakeListener.onShake(); 
          }
        }
        mLastForce = now;
      }
      mLastTime = now;
      mLastX = values[SensorManager.DATA_X];
      mLastY = values[SensorManager.DATA_Y];
      mLastZ = values[SensorManager.DATA_Z];
    }
  }

}

Vous pouvez également jeter un œil à la bibliothèque Seismic

public class Demo extends Activity implements ShakeDetector.Listener {
  @Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
    ShakeDetector sd = new ShakeDetector(this);
    sd.start(sensorManager);

    TextView tv = new TextView(this);
    tv.setGravity(CENTER);
    tv.setText("Shake me, bro!");
    setContentView(tv, new LayoutParams(MATCH_PARENT, MATCH_PARENT));
  }

  @Override public void hearShake() {
    Toast.makeText(this, "Don't shake me, bro!", Toast.LENGTH_SHORT).show();
  }
}

Il y a déjà beaucoup de solutions à cette question, mais je voulais en poster une qui:

• N'utilise pas de bibliothèque dépréciée dans l'API 3
• Calcule correctement l'amplitude de l'accélération
• Applique correctement un délai entre les événements de secousse

Voici une telle solution:

// variables for shake detection
private static final float SHAKE_THRESHOLD = 3.25f; // m/S**2
private static final int MIN_TIME_BETWEEN_SHAKES_MILLISECS = 1000;
private long mLastShakeTime;
private SensorManager mSensorMgr;

Pour initialiser la minuterie:

// Get a sensor manager to listen for shakes
mSensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);

// Listen for shakes
Sensor accelerometer = mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
if (accelerometer != null) {
    mSensorMgr.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}

SensorEventListener méthodes à remplacer:

@Override
public void onSensorChanged(SensorEvent event) {
    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
        long curTime = System.currentTimeMillis();
        if ((curTime - mLastShakeTime) > MIN_TIME_BETWEEN_SHAKES_MILLISECS) {

            float x = event.values[0];
            float y = event.values[1];
            float z = event.values[2];

            double acceleration = Math.sqrt(Math.pow(x, 2) +
                    Math.pow(y, 2) +
                    Math.pow(z, 2)) - SensorManager.GRAVITY_EARTH;
            Log.d(APP_NAME, "Acceleration is " + acceleration + "m/s^2");

            if (acceleration > SHAKE_THRESHOLD) {
                mLastShakeTime = curTime;
                Log.d(APP_NAME, "Shake, Rattle, and Roll");
            }
        }
    }
}

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // Ignore
}

Quand tu as tout fini

// Stop listening for shakes
mSensorMgr.unregisterListener(this);

Étant donné que SensorListener est obsolète , utilisez le code suivant:

/* 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) {
  }
};

@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();
}

Ensuite:

/* 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;

La question avec tous les détails peut être trouvée ici:

Android: je veux le secouer

Vous pouvez utiliser Seismic :

Voir le code ici:

https://github.com/square/seismic/blob/master/library/src/main/java/com/squareup/seismic/ShakeDetector.java

Ceci est pour Kotlinet utiliserSensorEventListener

Créer une nouvelle classe ShakeDetector

class ShakeDetector : SensorEventListener {
    private var mListener: OnShakeListener? = null
    private var mShakeTimestamp: Long = 0
    private var mShakeCount = 0
    fun setOnShakeListener(listener: OnShakeListener?) {
        mListener = listener
    }

    interface OnShakeListener {
        fun onShake(count: Int)
    }

    override fun onAccuracyChanged(
        sensor: Sensor,
        accuracy: Int
    ) { // ignore
    }

    override fun onSensorChanged(event: SensorEvent) {
        if (mListener != null) {
            val x = event.values[0]
            val y = event.values[1]
            val z = event.values[2]
            val gX = x / SensorManager.GRAVITY_EARTH
            val gY = y / SensorManager.GRAVITY_EARTH
            val gZ = z / SensorManager.GRAVITY_EARTH
            // gForce will be close to 1 when there is no movement.
            val gForce: Float = sqrt(gX * gX + gY * gY + gZ * gZ)
            if (gForce > SHAKE_THRESHOLD_GRAVITY) {
                val now = System.currentTimeMillis()
                // ignore shake events too close to each other (500ms)
                if (mShakeTimestamp + SHAKE_SLOP_TIME_MS > now) {
                    return
                }
                // reset the shake count after 3 seconds of no shakes
                if (mShakeTimestamp + SHAKE_COUNT_RESET_TIME_MS < now) {
                    mShakeCount = 0
                }
                mShakeTimestamp = now
                mShakeCount++
                mListener!!.onShake(mShakeCount)
            }
        }
    }

    companion object {
        /*
     * The gForce that is necessary to register as shake.
     * Must be greater than 1G (one earth gravity unit).
     * You can install "G-Force", by Blake La Pierre
     * from the Google Play Store and run it to see how
     *  many G's it takes to register a shake
     */
        private const val SHAKE_THRESHOLD_GRAVITY = 2.7f
        private const val SHAKE_SLOP_TIME_MS = 500
        private const val SHAKE_COUNT_RESET_TIME_MS = 3000
    }
}

Votre activité principale

class MainActivity : AppCompatActivity() {

    // The following are used for the shake detection
    private var mSensorManager: SensorManager? = null
    private var mAccelerometer: Sensor? = null
    private var mShakeDetector: ShakeDetector? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        initSensor()
    }
    override fun onResume() {
        super.onResume()
        // Add the following line to register the Session Manager Listener onResume
        mSensorManager!!.registerListener(
            mShakeDetector,
            mAccelerometer,
            SensorManager.SENSOR_DELAY_UI
        )
    }

    override fun onPause() { // Add the following line to unregister the Sensor Manager onPause
        mSensorManager!!.unregisterListener(mShakeDetector)
        super.onPause()
    }

    private fun initSensor() {
        // ShakeDetector initialization
        // ShakeDetector initialization
        mSensorManager = getSystemService(SENSOR_SERVICE) as SensorManager
        mAccelerometer = mSensorManager!!.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
        mShakeDetector = ShakeDetector()
        mShakeDetector!!.setOnShakeListener(object : OnShakeListener {
            override fun onShake(count: Int) { /*
                 * The following method, "handleShakeEvent(count):" is a stub //
                 * method you would use to setup whatever you want done once the
                 * device has been shook.
                 */
                Toast.makeText(this@MainActivity, count.toString(), Toast.LENGTH_SHORT).show()
            }
        })
    }
}

Enfin, ajoutez ce code à Manifests pour vous assurer que le téléphone dispose d'un accéléromètre

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

Procédez comme suit:

private float xAccel, yAccel, zAccel;
private float xPreviousAccel, yPreviousAccel, zPreviousAccel;
private boolean firstUpdate = true;
private final float shakeThreshold = 1.5f;
private boolean shakeInitiated = false;
SensorEventListener mySensorEventListener;
SensorManager mySensorManager;

Mettez ceci dans la méthode onCreate.

mySensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mySensorManager.registerListener(mySensorEventListener,
            mySensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
            SensorManager.SENSOR_DELAY_NORMAL);

Et maintenant la partie principale.

private boolean isAccelerationChanged() {
    float deltaX = Math.abs(xPreviousAccel - xAccel);
    float deltaY = Math.abs(yPreviousAccel - yAccel);
    float deltaZ = Math.abs(zPreviousAccel - zAccel);
    return (deltaX > shakeThreshold && deltaY > shakeThreshold)
            || (deltaX > shakeThreshold && deltaZ > shakeThreshold)
            || (deltaY > shakeThreshold && deltaZ > shakeThreshold);
}

private void updateAccelParameters(float xNewAccel, float yNewAccel, float zNewAccel) {
    if (firstUpdate) {
        xPreviousAccel = xNewAccel;
        yPreviousAccel = yNewAccel;
        zPreviousAccel = zNewAccel;
        firstUpdate = false;
    }else{
        xPreviousAccel = xAccel;
        yPreviousAccel = yAccel;
        zPreviousAccel = zAccel;
    }
    xAccel = xNewAccel;
    yAccel = yNewAccel;
    zAccel = zNewAccel;
}

private void executeShakeAction() {
    //this method is called when devices shakes
}

public void onSensorChanged(SensorEvent se) {
    updateAccelParameters(se.values[0], se.values[1], se.values[2]);
    if ((!shakeInitiated) && isAccelerationChanged()) {
        shakeInitiated = true;
    }else if ((shakeInitiated) && isAccelerationChanged()){
        executeShakeAction();
    }else if((shakeInitiated) && (!isAccelerationChanged())){
        shakeInitiated = false;
    }
}

public void onAccuracyChanged(Sensor sensor, int accuracy) {
    //setting the accuracy
}

N'oubliez pas d'ajouter ce code dans votre MainActivity.java:

MainActivity.java

mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
    public void onShake() {
        Toast.makeText(MainActivity.this, "Shake " , Toast.LENGTH_LONG).show();        
    }
});

@Override
protected void onResume() {
    super.onResume();
    mShaker.resume();
}

@Override
protected void onPause() {
    super.onPause();
    mShaker.pause();
}

Ou je vous donne un lien sur ce truc.