Android: Quiero sacudirlo

Aquí hay un código de ejemplo. Ponga esto en su clase de actividad:

/* 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(); } 

Y añada esto a su método onCreate:

  /* 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; 

Entonces puede pedir "mAccel" donde quiera en su aplicación para la aceleración actual, independiente del eje y limpiado de la aceleración estática como la gravedad. Será aprox. 0 si no hay movimiento, y, digamos> 2 si el dispositivo es sacudido.

Basado en los comentarios – para probar esto:

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

Notas:

El acelerómetro debe ser desactivado onPause y activado onResume para ahorrar recursos (CPU, Battery). El código supone que estamos en el planeta Tierra 😉 e inicializa la aceleración a la gravedad de la tierra. De lo contrario se obtendría un fuerte "sacudir" cuando la aplicación se inicia y "golpea" el suelo de caída libre. Sin embargo, el código se acostumbra a la gravitación debido al filtro de corte bajo y funcionaría también en otros planetas o en espacio libre, una vez que se inicialice. (Nunca se sabe cuánto tiempo su aplicación estará en uso … 😉

Aquí está mi código para la detección de gesto agitar:

 import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; /** * Listener that detects shake gesture. */ public class ShakeEventListener implements SensorEventListener { /** Minimum movement force to consider. */ private static final int MIN_FORCE = 10; /** * Minimum times in a shake gesture that the direction of movement needs to * change. */ private static final int MIN_DIRECTION_CHANGE = 3; /** Maximum pause between movements. */ private static final int MAX_PAUSE_BETHWEEN_DIRECTION_CHANGE = 200; /** Maximum allowed time for shake gesture. */ private static final int MAX_TOTAL_DURATION_OF_SHAKE = 400; /** Time when the gesture started. */ private long mFirstDirectionChangeTime = 0; /** Time when the last movement started. */ private long mLastDirectionChangeTime; /** How many movements are considered so far. */ private int mDirectionChangeCount = 0; /** The last x position. */ private float lastX = 0; /** The last y position. */ private float lastY = 0; /** The last z position. */ private float lastZ = 0; /** OnShakeListener that is called when shake is detected. */ private OnShakeListener mShakeListener; /** * Interface for shake gesture. */ public interface OnShakeListener { /** * Called when shake gesture is detected. */ void onShake(); } public void setOnShakeListener(OnShakeListener listener) { mShakeListener = listener; } @Override public void onSensorChanged(SensorEvent se) { // get sensor data float x = se.values[SensorManager.DATA_X]; float y = se.values[SensorManager.DATA_Y]; float z = se.values[SensorManager.DATA_Z]; // calculate movement float totalMovement = Math.abs(x + y + z - lastX - lastY - lastZ); if (totalMovement > MIN_FORCE) { // get time long now = System.currentTimeMillis(); // store first movement time if (mFirstDirectionChangeTime == 0) { mFirstDirectionChangeTime = now; mLastDirectionChangeTime = now; } // check if the last movement was not long ago long lastChangeWasAgo = now - mLastDirectionChangeTime; if (lastChangeWasAgo < MAX_PAUSE_BETHWEEN_DIRECTION_CHANGE) { // store movement data mLastDirectionChangeTime = now; mDirectionChangeCount++; // store last sensor data lastX = x; lastY = y; lastZ = z; // check how many movements are so far if (mDirectionChangeCount >= MIN_DIRECTION_CHANGE) { // check total duration long totalDuration = now - mFirstDirectionChangeTime; if (totalDuration < MAX_TOTAL_DURATION_OF_SHAKE) { mShakeListener.onShake(); resetShakeParameters(); } } } else { resetShakeParameters(); } } } /** * Resets the shake parameters to their default values. */ private void resetShakeParameters() { mFirstDirectionChangeTime = 0; mDirectionChangeCount = 0; mLastDirectionChangeTime = 0; lastX = 0; lastY = 0; lastZ = 0; } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } } 

Agregue esto en su actividad:

  private SensorManager mSensorManager; private ShakeEventListener mSensorListener; 

…

En onCreate () agregar:

  mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); mSensorListener = new ShakeEventListener(); mSensorListener.setOnShakeListener(new ShakeEventListener.OnShakeListener() { public void onShake() { Toast.makeText(KPBActivityImpl.this, "Shake!", Toast.LENGTH_SHORT).show(); } }); 

y:

 @Override protected void onResume() { super.onResume(); mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_UI); } @Override protected void onPause() { mSensorManager.unregisterListener(mSensorListener); super.onPause(); } 

Aquí hay otra implementación que se basa en algunos de los consejos aquí, así como el código del sitio de desarrolladores de Android.

MainActivity.java

 public class MainActivity extends Activity { private ShakeDetector mShakeDetector; private SensorManager mSensorManager; private Sensor mAccelerometer; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // ShakeDetector initialization mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); mShakeDetector = new ShakeDetector(new OnShakeListener() { @Override public void onShake() { // Do stuff! } }); } @Override protected void onResume() { super.onResume(); mSensorManager.registerListener(mShakeDetector, mAccelerometer, SensorManager.SENSOR_DELAY_UI); } @Override protected void onPause() { mSensorManager.unregisterListener(mShakeDetector); super.onPause(); } } 

ShakeDetector.java

 package com.example.test; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; public class ShakeDetector implements SensorEventListener { // Minimum acceleration needed to count as a shake movement private static final int MIN_SHAKE_ACCELERATION = 5; // Minimum number of movements to register a shake private static final int MIN_MOVEMENTS = 2; // Maximum time (in milliseconds) for the whole shake to occur private static final int MAX_SHAKE_DURATION = 500; // Arrays to store gravity and linear acceleration values private float[] mGravity = { 0.0f, 0.0f, 0.0f }; private float[] mLinearAcceleration = { 0.0f, 0.0f, 0.0f }; // Indexes for x, y, and z values private static final int X = 0; private static final int Y = 1; private static final int Z = 2; // OnShakeListener that will be notified when the shake is detected private OnShakeListener mShakeListener; // Start time for the shake detection long startTime = 0; // Counter for shake movements int moveCount = 0; // Constructor that sets the shake listener public ShakeDetector(OnShakeListener shakeListener) { mShakeListener = shakeListener; } @Override public void onSensorChanged(SensorEvent event) { // This method will be called when the accelerometer detects a change. // Call a helper method that wraps code from the Android developer site setCurrentAcceleration(event); // Get the max linear acceleration in any direction float maxLinearAcceleration = getMaxCurrentLinearAcceleration(); // Check if the acceleration is greater than our minimum threshold if (maxLinearAcceleration > MIN_SHAKE_ACCELERATION) { long now = System.currentTimeMillis(); // Set the startTime if it was reset to zero if (startTime == 0) { startTime = now; } long elapsedTime = now - startTime; // Check if we're still in the shake window we defined if (elapsedTime > MAX_SHAKE_DURATION) { // Too much time has passed. Start over! resetShakeDetection(); } else { // Keep track of all the movements moveCount++; // Check if enough movements have been made to qualify as a shake if (moveCount > MIN_MOVEMENTS) { // It's a shake! Notify the listener. mShakeListener.onShake(); // Reset for the next one! resetShakeDetection(); } } } } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { // Intentionally blank } private void setCurrentAcceleration(SensorEvent event) { /* * BEGIN SECTION from Android developer site. This code accounts for * gravity using a high-pass filter */ // alpha is calculated as t / (t + dT) // with t, the low-pass filter's time-constant // and dT, the event delivery rate final float alpha = 0.8f; // Gravity components of x, y, and z acceleration mGravity[X] = alpha * mGravity[X] + (1 - alpha) * event.values[X]; mGravity[Y] = alpha * mGravity[Y] + (1 - alpha) * event.values[Y]; mGravity[Z] = alpha * mGravity[Z] + (1 - alpha) * event.values[Z]; // Linear acceleration along the x, y, and z axes (gravity effects removed) mLinearAcceleration[X] = event.values[X] - mGravity[X]; mLinearAcceleration[Y] = event.values[Y] - mGravity[Y]; mLinearAcceleration[Z] = event.values[Z] - mGravity[Z]; /* * END SECTION from Android developer site */ } private float getMaxCurrentLinearAcceleration() { // Start by setting the value to the x value float maxLinearAcceleration = mLinearAcceleration[X]; // Check if the y value is greater if (mLinearAcceleration[Y] > maxLinearAcceleration) { maxLinearAcceleration = mLinearAcceleration[Y]; } // Check if the z value is greater if (mLinearAcceleration[Z] > maxLinearAcceleration) { maxLinearAcceleration = mLinearAcceleration[Z]; } // Return the greatest value return maxLinearAcceleration; } private void resetShakeDetection() { startTime = 0; moveCount = 0; } // (I'd normally put this definition in it's own .java file) public interface OnShakeListener { public void onShake(); } } 

Me gustó mucho la respuesta de Peterdk. Me lo tomé a mí mismo para hacer una cuchilla de ajustes a su código.

Archivo: ShakeDetector.java

 import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.util.FloatMath; public class ShakeDetector implements SensorEventListener { // The gForce that is necessary to register as shake. Must be greater than 1G (one earth gravity unit) private static final float SHAKE_THRESHOLD_GRAVITY = 2.7F; private static final int SHAKE_SLOP_TIME_MS = 500; private static final int SHAKE_COUNT_RESET_TIME_MS = 3000; private OnShakeListener mListener; private long mShakeTimestamp; private int mShakeCount; public void setOnShakeListener(OnShakeListener listener) { this.mListener = listener; } public interface OnShakeListener { public void onShake(int count); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { // ignore } @Override public void onSensorChanged(SensorEvent event) { if (mListener != null) { float x = event.values[0]; float y = event.values[1]; float z = event.values[2]; float gX = x / SensorManager.GRAVITY_EARTH; float gY = y / SensorManager.GRAVITY_EARTH; float gZ = z / SensorManager.GRAVITY_EARTH; // gForce will be close to 1 when there is no movement. float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ); if (gForce > SHAKE_THRESHOLD_GRAVITY) { final long 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); } } } } 

Además, no olvide que necesita registrar una instancia de ShakeDetector con el SensorManager.

 // ShakeDetector initialization mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); mShakeDetector = new ShakeDetector(); mShakeDetector.setOnShakeListener(new OnShakeListener() { @Override public void onShake(int count) { handleShakeEvent(count); } }); mSensorManager.registerListener(mShakeDetector, mAccelerometer, SensorManager.SENSOR_DELAY_UI); 

Estoy desarrollando una aplicación de detección de movimiento y detección de sacudidas para mi proyecto universitario.

Además del objetivo original de la aplicación, estoy dividiendo la parte de la biblioteca (responsable de la detección de movimientos y sacudidas) de la aplicación. El código es gratuito, disponible en SourceForge con el nombre de proyecto "BenderCatch". La documentación que estoy produciendo estará lista hacia mediados de septiembre. http://sf.net/projects/bendercatch

Utiliza una forma más precisa de detectar sacudidas: MIRA la diferencia de fuerza entre SensorEvents Y las oscilaciones presentes en los ejes X e Y al realizar una sacudida. Incluso puede hacer un sonido (o vibrar) en cada oscilación de la sacudida.

Siéntase libre de preguntarme más por e-mail a raffaele [at] terzigno [dot] com

He escrito un pequeño ejemplo para detectar batidos verticales y horizontales y mostrar un Toast .

 public class Accelerometerka2Activity extends Activity implements SensorEventListener { private float mLastX, mLastY, mLastZ; private boolean mInitialized; private SensorManager mSensorManager; private Sensor mAccelerometer; private final float NOISE = (float) 8.0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mInitialized = false; mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); mSensorManager.registerListener(this, mAccelerometer , SensorManager.SENSOR_DELAY_NORMAL); } protected void onResume() { super.onResume(); mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL); } protected void onPause() { super.onPause(); mSensorManager.unregisterListener(this); } public void onAccuracyChanged(Sensor sensor, int accuracy) { // can be safely ignored for this demo } public void onSensorChanged(SensorEvent event) { float x = event.values[0]; float y = event.values[1]; float z = event.values[2]; if (!mInitialized) { mLastX = x; mLastY = y; mLastZ = z; mInitialized = true; } else { float deltaX = Math.abs(mLastX - x); float deltaY = Math.abs(mLastY - y); float deltaZ = Math.abs(mLastZ - z); if (deltaX < NOISE) deltaX = (float)0.0; if (deltaY < NOISE) deltaY = (float)0.0; if (deltaZ < NOISE) deltaZ = (float)0.0; mLastX = x; mLastY = y; mLastZ = z; if (deltaX > deltaY) { Toast.makeText(getBaseContext(), "Horizental", Toast.LENGTH_SHORT).show(); } else if (deltaY > deltaX) { Toast.makeText(getBaseContext(), "Vertical", Toast.LENGTH_SHORT).show(); } } } } 

He intentado varias implementaciones, pero quisiera compartir la mía. Utiliza G-force como unidad para el cálculo del umbral. Se hace un poco más fácil de entender lo que está pasando, y también con la fijación de un buen umbral.

Simplemente registra un aumento en la fuerza G y activa el oyente si excede el umbral. No utiliza ningún umbral de dirección, causa que realmente no necesita que si sólo desea registrar un buen batido.

Por supuesto, se necesita el registro estándar y el registro ONU de este oyente en la Activity .

Además, para comprobar el umbral que necesitas, te recomendamos la siguiente aplicación (no estoy de ninguna manera conectado a esa aplicación)

  public class UmitoShakeEventListener implements SensorEventListener { /** * The gforce that is necessary to register as shake. (Must include 1G * gravity) */ private final float shakeThresholdInGForce = 2.25F; private final float gravityEarth = SensorManager.GRAVITY_EARTH; private OnShakeListener listener; public void setOnShakeListener(OnShakeListener listener) { this.listener = listener; } public interface OnShakeListener { public void onShake(); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { // ignore } @Override public void onSensorChanged(SensorEvent event) { if (listener != null) { float x = event.values[0]; float y = event.values[1]; float z = event.values[2]; float gX = x / gravityEarth; float gY = y / gravityEarth; float gZ = z / gravityEarth; //G-Force will be 1 when there is no movement. (gravity) float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ); if (gForce > shakeThresholdInGForce) { listener.onShake(); } } } } 

Aquí hay otro código para esto:

 import java.util.List; import java.util.Timer; import java.util.TimerTask; import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Handler; public class AccelerometerListener implements SensorEventListener { private SensorManager sensorManager; private List<Sensor> sensors; private Sensor sensor; private long lastUpdate = -1; private long currentTime = -1; private Main parent; private Timer timer; private int shakes; private static final Handler mHandler = new Handler(); private float last_x, last_y, last_z; private float current_x, current_y, current_z, currenForce; private static final int FORCE_THRESHOLD = 500; private final int DATA_X = SensorManager.DATA_X; private final int DATA_Y = SensorManager.DATA_Y; private final int DATA_Z = SensorManager.DATA_Z; public AccelerometerListener(Main parent) { SensorManager sensorService = (SensorManager) parent .getSystemService(Context.SENSOR_SERVICE); this.sensorManager = sensorService; if (sensorService == null) return; this.sensors = sensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER); if (sensors.size() > 0) { sensor = sensors.get(0); } this.parent = parent; } public void start() { if (sensor == null) return; sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_GAME); } public void stop() { if (sensorManager == null) return; sensorManager.unregisterListener(this); } public void onAccuracyChanged(Sensor s, int valu) { } public void onSensorChanged(SensorEvent event) { if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER) return; currentTime = System.currentTimeMillis(); if ((currentTime - lastUpdate) > 50) { long diffTime = (currentTime - lastUpdate); lastUpdate = currentTime; current_x = event.values[DATA_X]; current_y = event.values[DATA_Y]; current_z = event.values[DATA_Z]; currenForce = Math.abs(current_x + current_y + current_z - last_x - last_y - last_z) / diffTime * 10000; if (currenForce > FORCE_THRESHOLD) { shakeDetected(); } last_x = current_x; last_y = current_y; last_z = current_z; } } private void shakeDetected() { shakes++; if (shakes == 1) { if (timer != null) { timer.cancel(); } timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { if (shakes > 3) { mHandler.post(new Runnable() { public void run() { // shake } }); } shakes = 0; } }, 500); } } } 

Puede usar sísmica . Un ejemplo puede ser encontrado aquí .

 package anywheresoftware.b4a.student; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.util.FloatMath; public class ShakeEventListener implements SensorEventListener { /* * 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 static final float SHAKE_THRESHOLD_GRAVITY = 2.7F; private static int SHAKE_SLOP_TIME_MS = 500; private static final int SHAKE_COUNT_RESET_TIME_MS = 1000; private OnShakeListener mListener; private long mShakeTimestamp; private int mShakeCount; public void setOnShakeListener(OnShakeListener listener) { this.mListener = listener; } public interface OnShakeListener { public void onShake(int count); } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { // ignore } @Override public void onSensorChanged(SensorEvent event) { if (mListener != null) { float x = event.values[0]; float y = event.values[1]; float z = event.values[2]; float gX = x / SensorManager.GRAVITY_EARTH; float gY = y / SensorManager.GRAVITY_EARTH; float gZ = z / SensorManager.GRAVITY_EARTH; // gForce will be close to 1 when there is no movement. float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ); if (gForce > SHAKE_THRESHOLD_GRAVITY) { final long now = System.currentTimeMillis(); // ignore shake events too close to each other (500ms) if (mShakeTimestamp + getSHAKE_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); } } } private long getSHAKE_SLOP_TIME_MS() { // TODO Auto-generated method stub return SHAKE_SLOP_TIME_MS; } public void setSHAKE_SLOP_TIME_MS(int sHAKE_SLOP_TIME_MS) { SHAKE_SLOP_TIME_MS = sHAKE_SLOP_TIME_MS; } } 

  package com.example.shakingapp; import android.app.Activity; import android.graphics.Color; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; import android.os.Bundle; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.Toast; public class MainActivity extends Activity implements SensorEventListener { private SensorManager sensorManager; private boolean color = false; private View view; private long lastUpdate; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); view = findViewById(R.id.textView); view.setBackgroundColor(Color.GREEN); sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); lastUpdate = System.currentTimeMillis(); } @Override public void onSensorChanged(SensorEvent event) { if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) { getAccelerometer(event); } } private void getAccelerometer(SensorEvent event) { float[] values = event.values; // Movement float x = values[0]; float y = values[1]; float z = values[2]; System.out.println(x); System.out.println(y); System.out.println(z); System.out.println(SensorManager.GRAVITY_EARTH ); float accelationSquareRoot = (x * x + y * y + z * z) / (SensorManager.GRAVITY_EARTH * SensorManager.GRAVITY_EARTH); long actualTime = System.currentTimeMillis(); if (accelationSquareRoot >= 2) // { if (actualTime - lastUpdate < 200) { return; } lastUpdate = actualTime; Toast.makeText(this, "Device was shuffed "+accelationSquareRoot, Toast.LENGTH_SHORT) .show(); if (color) { view.setBackgroundColor(Color.GREEN); } else { view.setBackgroundColor(Color.RED); } color = !color; } } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override protected void onResume() { super.onResume(); // register this class as a listener for the orientation and // accelerometer sensors sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); } @Override protected void onPause() { // unregister listener super.onPause(); sensorManager.unregisterListener(this); } } 

Shaker.java

  import java.util.ArrayList; import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; public class Shaker implements SensorEventListener{ private static final String SENSOR_SERVICE = Context.SENSOR_SERVICE; private SensorManager sensorMgr; private Sensor mAccelerometer; private boolean accelSupported; private long timeInMillis; private long threshold; private OnShakerTreshold listener; ArrayList<Float> valueStack; public Shaker(Context context, OnShakerTreshold listener, long timeInMillis, long threshold) { try { this.timeInMillis = timeInMillis; this.threshold = threshold; this.listener = listener; if (timeInMillis<100){ throw new Exception("timeInMillis < 100ms"); } valueStack = new ArrayList<Float>((int)(timeInMillis/100)); sensorMgr = (SensorManager) context.getSystemService(SENSOR_SERVICE); mAccelerometer = sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); } catch (Exception e){ e.printStackTrace(); } } public void start() { try { accelSupported = sensorMgr.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_GAME); if (!accelSupported) { stop(); throw new Exception("Sensor is not supported"); } } catch (Exception e){ e.printStackTrace(); } } public void stop(){ try { sensorMgr.unregisterListener(this, mAccelerometer); } catch (Exception e){ e.printStackTrace(); } } @Override protected void finalize() throws Throwable { try { stop(); } catch (Exception e){ e.printStackTrace(); } super.finalize(); } long lastUpdate = 0; private float last_x; private float last_y; private float last_z; public void onSensorChanged(SensorEvent event) { try { if (event.sensor == mAccelerometer) { long curTime = System.currentTimeMillis(); if ((curTime-lastUpdate)>getNumberOfMeasures()){ lastUpdate = System.currentTimeMillis(); float[] values = event.values; if (valueStack.size()>(int)getNumberOfMeasures()) valueStack.remove(0); float x = (int)(values[SensorManager.DATA_X]); float y = (int)(values[SensorManager.DATA_Y]); float z = (int)(values[SensorManager.DATA_Z]); float speed = Math.abs((x+y+z) - (last_x + last_y + last_z)); valueStack.add(speed); String posText = String.format("X:%4.0f Y:%4.0f Z:%4.0f", (x-last_x), (y-last_y), (z-last_z)); last_x = (x); last_y = (y); last_z = (z); float sumOfValues = 0; float avgOfValues = 0; for (float f : valueStack){ sumOfValues = (sumOfValues+f); } avgOfValues = sumOfValues/(int)getNumberOfMeasures(); if (avgOfValues>=threshold){ listener.onTreshold(); valueStack.clear(); } System.out.println(String.format("M: %+4d A: %5.0f V: %4.0f %s", valueStack.size(),avgOfValues,speed,posText)); } } } catch (Exception e){ e.printStackTrace(); } } private long getNumberOfMeasures() { return timeInMillis/100; } public void onAccuracyChanged(Sensor sensor, int accuracy) {} public interface OnShakerTreshold { public void onTreshold(); } } 

MainActivity.java

 public class MainActivity extends Activity implements OnShakerTreshold{ private Shaker s; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); s = new Shaker(getApplicationContext(), this, 5000, 20); // 5000 = 5 second of shaking // 20 = minimal threshold (very angry shaking :D) // beware screen rotation reset counter } @Override protected void onResume() { s.start(); super.onResume(); } @Override protected void onPause() { s.stop(); super.onPause(); } public void onTreshold() { System.out.println("FIRE LISTENER"); RingtoneManager.getRingtone(getApplicationContext(), RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)).play(); } } 

Que te diviertas.

 // Need to implement SensorListener public class ShakeActivity extends Activity implements SensorListener { // For shake motion detection. private SensorManager sensorMgr; private long lastUpdate = -1; private float x, y, z; private float last_x, last_y, last_z; private static final int SHAKE_THRESHOLD = 800; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // start motion detection sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE); boolean accelSupported = sensorMgr.registerListener(this, SensorManager.SENSOR_ACCELEROMETER, SensorManager.SENSOR_DELAY_GAME); if (!accelSupported) { // on accelerometer on this device sensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER); } } protected void onPause() { if (sensorMgr != null) { sensorMgr.unregisterListener(this, SensorManager.SENSOR_ACCELEROMETER); sensorMgr = null; } super.onPause(); } public void onAccuracyChanged(int arg0, int arg1) { // TODO Auto-generated method stub } 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) { // yes, this is a shake action! Do something about it! } last_x = x; last_y = y; last_z = z; } } } } 

Usted debe suscribirse como un SensorEventListene r, y obtener los datos del accelerometer . Una vez que lo tiene, debe supervisar el cambio repentino en la dirección (señal) de la aceleración en un cierto eje. Sería una buena indicación para el 'shake' de la 'shake' .

Working with me v.good Reference

 public class ShakeEventListener implements SensorEventListener { public final static int SHAKE_LIMIT = 15; public final static int LITTLE_SHAKE_LIMIT = 5; private SensorManager mSensorManager; private float mAccel = 0.00f; private float mAccelCurrent = SensorManager.GRAVITY_EARTH; private float mAccelLast = SensorManager.GRAVITY_EARTH; private ShakeListener listener; public interface ShakeListener { public void onShake(); public void onLittleShake(); } public ShakeEventListener(ShakeListener l) { Activity a = (Activity) l; mSensorManager = (SensorManager) a.getSystemService(Context.SENSOR_SERVICE); listener = l; registerListener(); } public ShakeEventListener(Activity a, ShakeListener l) { mSensorManager = (SensorManager) a.getSystemService(Context.SENSOR_SERVICE); listener = l; registerListener(); } public void registerListener() { mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL); } public void unregisterListener() { mSensorManager.unregisterListener(this); } public void onSensorChanged(SensorEvent se) { float x = se.values[0]; float y = se.values[1]; float z = se.values[2]; mAccelLast = mAccelCurrent; mAccelCurrent = (float) FloatMath.sqrt(x*x + y*y + z*z); float delta = mAccelCurrent - mAccelLast; mAccel = mAccel * 0.9f + delta; if(mAccel > SHAKE_LIMIT) listener.onShake(); else if(mAccel > LITTLE_SHAKE_LIMIT) listener.onLittleShake(); } public void onAccuracyChanged(Sensor sensor, int accuracy) {} } 

You might want to try open source tinybus . With it shake detection is as easy as this.

 public class MainActivity extends Activity { private Bus mBus; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ... // Create a bus and attach it to activity mBus = TinyBus.from(this).wire(new ShakeEventWire()); } @Subscribe public void onShakeEvent(ShakeEvent event) { Toast.makeText(this, "Device has been shaken", Toast.LENGTH_SHORT).show(); } @Override protected void onStart() { super.onStart(); mBus.register(this); } @Override protected void onStop() { mBus.unregister(this); super.onStop(); } } 

It uses seismic for shake detection.