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/*
* 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);
}
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