content: /*
   * Copyright (C) 2013 The Android Open Source Project
   *
   * 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 android.hardware;
  
  /**
   * This class is the listener used to handle Trigger Sensors.
   * Trigger Sensors are sensors that trigger an event and are automatically
   * disabled. {@link Sensor#TYPE_SIGNIFICANT_MOTION} is one such example.
   * <p>
   * {@link SensorManager} lets you access the device's {@link android.hardware.Sensor
   * sensors}. Get an instance of {@link SensorManager} by calling
   * {@link android.content.Context#getSystemService(java.lang.String)
   * Context.getSystemService()} with the argument
   * {@link android.content.Context#SENSOR_SERVICE}.
   * <p>Here's an example setup for a TriggerEventListener:
   *
   * <pre>
   * class TriggerListener extends TriggerEventListener {
   *     public void onTrigger(TriggerEvent event) {
   *          // Do Work.
   *
   *     // As it is a one shot sensor, it will be canceled automatically.
   *     // SensorManager.requestTriggerSensor(this, mSigMotion); needs to
   *     // be called again, if needed.
   *     }
   * }
   * public class SensorActivity extends Activity {
   *     private final SensorManager mSensorManager;
   *     private final Sensor mSigMotion;
   *     private final TriggerEventListener mListener = new TriggerEventListener();
   *
   *     public SensorActivity() {
   *         mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
   *         mSigMotion = mSensorManager.getDefaultSensor(Sensor.TYPE_SIGNIFICANT_MOTION);
   *     }
   *
   *     protected void onResume() {
   *         super.onResume();
   *         mSensorManager.requestTriggerSensor(mListener, mSigMotion);
   *     }
   *
   *     protected void onPause() {
   *         super.onPause();
   *         // Call disable to ensure that the trigger request has been canceled.
   *         mSensorManager.cancelTriggerSensor(mListener, mSigMotion);
   *     }
   *
   * }
   * </pre>
   *
   * @see TriggerEvent
   * @see Sensor
   */
  public abstract class TriggerEventListener {
      /**
       * The method that will be called when the sensor
       * is triggered. Override this method in your implementation
       * of this class.
       *
       * @param event The details of the event.
       */
      public abstract void onTrigger(TriggerEvent event);
  }
  