Android Open Source - android-play-api-client Shake Sensor Listener

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License

The source code is released under:

Apache License

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Java Source Code

package ar.com.gmvsoft.play.hardware;
//  ww w .ja  v a2 s.  c  o m
import android.content.Context;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import ar.com.gmvsoft.play.Global;
import ar.com.gmvsoft.play.ui.DebugOptionsActivity_;

public class ShakeSensorListener implements SensorEventListener {

  private float accel; // acceleration apart from gravity
  private float accelCurrent; // current acceleration including gravity
  private float accelLast; // last acceleration including gravity
  private Context context;

  public ShakeSensorListener() {
    accel = 0.00f;
    accelCurrent = SensorManager.GRAVITY_EARTH;
    accelLast = SensorManager.GRAVITY_EARTH;
  }

  public ShakeSensorListener(Context context) {
    this.context = context;
  }

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

  @Override
  public void onSensorChanged(SensorEvent se) {
    float x = se.values[0];
    float y = se.values[1];
    float z = se.values[2];
    accelLast = accelCurrent;
    accelCurrent = (float) Math.sqrt((double) (x * x + y * y + z * z));
    float delta = accelCurrent - accelLast;
    accel = accel * 0.9f + delta; // perform low-cut filter

    if (deviceShaked()) {
      Intent intent = new Intent(context, DebugOptionsActivity_.class);
      context.startActivity(intent);
    }
  }

  public boolean deviceShaked() {
    return (accel > 12) && Global.instance().getShakeIt();
  }

}

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