Android Open Source - droidengine2d Accelerometer

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License

The source code is released under:

Apache License

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Java Source Code

/*   Copyright 2013-2014 Miguel Vicente Linares
 *//from w w  w.j a  v  a 2 s . co m
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.miviclin.droidengine2d.input.sensor;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;

/**
 * Accelerometer.
 * 
 * @author Miguel Vicente Linares
 * 
 */
public class Accelerometer {

  private SensorManager sensorManager;
  private AccelerometerValuesListener valuesListener;
  private SensorEventListener customListener;
  private boolean listening;

  /**
   * Creates an Accelerometer with an AccelerometerValuesListener.
   * 
   * @param activity Activity.
   */
  public Accelerometer(Activity activity) {
    this(activity, null);
  }

  /**
   * Creates an Accelerometer with an AccelerometerValuesListener and the specified listener.
   * 
   * @param activity Activity.
   * @param customListener SensorEventListener.
   */
  public Accelerometer(Activity activity, SensorEventListener customListener) {
    this.sensorManager = (SensorManager) activity.getSystemService(Context.SENSOR_SERVICE);
    this.valuesListener = new AccelerometerValuesListener(activity, 0.2f);
    this.customListener = customListener;
    this.listening = false;
  }

  /**
   * Starts listening the accelerometer.
   */
  public void startListening() {
    Sensor accelerometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    sensorManager.registerListener(valuesListener, accelerometerSensor, SensorManager.SENSOR_DELAY_NORMAL);
    if (customListener != null) {
      sensorManager.registerListener(customListener, accelerometerSensor, SensorManager.SENSOR_DELAY_NORMAL);
    }
    listening = true;
  }

  /**
   * Stops listening the accelerometer.
   */
  public void stopListening() {
    sensorManager.unregisterListener(valuesListener);
    if (customListener != null) {
      sensorManager.unregisterListener(customListener);
    }
    listening = false;
  }

  /**
   * Returns true if this object is listening the accelerometer.
   * 
   * @return true if this object is listening the accelerometer, false otherwise
   */
  public boolean isListening() {
    return listening;
  }

  /**
   * Returns the AccelerometerValuesListener.
   * 
   * @return AccelerometerValuesListener
   */
  public AccelerometerValuesListener getValuesListener() {
    return valuesListener;
  }

  /**
   * Returns the custom listener.
   * 
   * @return SensorEventListener
   */
  public SensorEventListener getCustomListener() {
    return customListener;
  }

  /**
   * Sets the custom listener.
   * 
   * @param listener SensorEventListener.
   */
  public void setCustomListener(SensorEventListener listener) {
    this.customListener = listener;
  }

}

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