How to detect shake event with android

Question

How can I detect a shake event with android  How can I detect the shake direction    I want to change the image in an imageview when shaking occurs

User · Answer

There are a lot of solutions to this question already, but I wanted to post one that:

Doesn't use a library depricated in API 3
Calculates the magnitude of the acceleration correctly
Correctly applies a timeout between shake events

Here is such a 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;

To initialize the timer:

// 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 methods to override:

@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
}

When you are all done

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

User · Answer

Google helps a lot      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   gt  SHAKE TIMEOUT          mShakeCount   0             if   now - mLastTime   gt  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  gt  FORCE THRESHOLD            if     mShakeCount  gt   SHAKE COUNT   amp  amp   now - mLastShake  gt  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

User · Answer

This is for Kotlin and use SensorEventListener  Create new  class 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  gt  SHAKE THRESHOLD GRAVITY                    val now   System currentTimeMillis                      ignore shake events too close to each other  500ms                  if  mShakeTimestamp   SHAKE SLOP TIME MS  gt  now                        return                                      reset the shake count after 3 seconds of no shakes                 if  mShakeTimestamp   SHAKE COUNT RESET TIME MS  lt  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           Your main Activity  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                                      Finally add this code to Manifests to make sure the phone has an accelerometer   lt uses-feature android name  android hardware sensor accelerometer  android required  true    gt

User · Answer

You can use Seismic   See the code here   https   github com square seismic blob master library src main java com squareup seismic ShakeDetector java

User · Answer

Dont forget to add this code in your 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        Or I give you a link about this stuff

User · Answer

From the code point of view  you need to implement the SensorListener   public class ShakeActivity extends Activity implements SensorListener   You will need to acquire a SensorManager   sensorMgr    SensorManager  getSystemService SENSOR SERVICE     And register this sensor with desired flags   sensorMgr registerListener this  SensorManager SENSOR ACCELEROMETER  SensorManager SENSOR DELAY GAME     In your onSensorChange   method  you determine whether it   s a shake or not   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   gt  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  gt  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                The shake threshold is defined as   private static final int SHAKE THRESHOLD   800    There are some other methods too  to detect shake motion  look at this link  If that link does not work or link is dead  look at this web archive     Have a look at this example for android shake detect listener     Note  SensorListener is deprecated  we can use SensorEventListener instead  Here is a quick example using SensorEventListener   Thanks

User · Answer

You can also take a look on library 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

User · Answer

Do the following   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    Put this in onCreate method   mySensorManager    SensorManager  getSystemService Context SENSOR SERVICE       mySensorManager registerListener mySensorEventListener              mySensorManager getDefaultSensor Sensor TYPE ACCELEROMETER               SensorManager SENSOR DELAY NORMAL     And now the main part   private boolean isAccelerationChanged         float deltaX   Math abs xPreviousAccel - xAccel       float deltaY   Math abs yPreviousAccel - yAccel       float deltaZ   Math abs zPreviousAccel - zAccel       return  deltaX  gt  shakeThreshold  amp  amp  deltaY  gt  shakeThreshold                  deltaX  gt  shakeThreshold  amp  amp  deltaZ  gt  shakeThreshold                  deltaY  gt  shakeThreshold  amp  amp  deltaZ  gt  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   amp  amp  isAccelerationChanged              shakeInitiated   true       else if   shakeInitiated   amp  amp  isAccelerationChanged             executeShakeAction         else if  shakeInitiated   amp  amp    isAccelerationChanged              shakeInitiated   false           public void onAccuracyChanged Sensor sensor  int accuracy          setting the accuracy

User · Answer

Since SensorListener is deprecated so use the following code      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        Then      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    The question with full details could be found here    Android  I want to shake it

[android] How to detect shake event with android?

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