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/*
* Copyright (c) 2015 The CyanogenMod 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 com.cyanogenmod.settings.device;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class ProximitySensor implements SensorEventListener {
private static final int PROXIMITY_DELAY = 1000 * 1000;
private static final int PROXIMITY_LATENCY = 100 * 1000;
private boolean mEnabled;
private boolean mReady;
private boolean mState;
private float mMaxRange;
private ProximityListener mProximityListener;
private Sensor mProximitySensor;
private SensorManager mSensorManager;
public static interface ProximityListener {
public abstract void onEvent(boolean isNear, long timestamp);
public abstract void onInit(boolean isNear, long timestamp);
}
public ProximitySensor(Context context, SensorManager sensorManager,
ProximityListener proximitylistener) {
mEnabled = false;
reset();
mProximitySensor = sensorManager.getDefaultSensor(
Sensor.TYPE_PROXIMITY, true);
mProximityListener = proximitylistener;
mSensorManager = sensorManager;
if (mProximitySensor != null) {
mMaxRange = mProximitySensor.getMaximumRange();
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
if (event.values.length == 0) return;
boolean isNear = (event.values[0] < mMaxRange);
// Launch an event
if (mState != isNear) {
mState = isNear;
if (mReady) {
mProximityListener.onEvent(mState, event.timestamp);
}
}
// Init the sensor
if (!mReady) {
mProximityListener.onInit(mState, event.timestamp);
mReady = true;
}
}
public void enable() {
if (!mEnabled && mProximitySensor != null) {
mSensorManager.registerListener(this, mProximitySensor,
PROXIMITY_DELAY, PROXIMITY_LATENCY);
mEnabled = true;
}
}
public void reset() {
mReady = false;
mState = false;
}
public void disable() {
if (mEnabled && mProximitySensor != null) {
mSensorManager.unregisterListener(this, mProximitySensor);
mEnabled = false;
}
}
}
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