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/* * Copyright (C) 2011 The Rexsee Open Source Project * * Licensed under the Rexsee License, Version 1.0 (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.rexsee.com/CN/legal/license.html * * 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 rexsee.sensor; import rexsee.core.browser.JavascriptInterface; import rexsee.core.browser.RexseeBrowser; import android.content.Context; import android.hardware.Sensor; import android.hardware.SensorEvent; import android.hardware.SensorEventListener; import android.hardware.SensorManager; public class RexseeSensorProximity implements JavascriptInterface { private static final String INTERFACE_NAME = "Proximity"; @Override public String getInterfaceName() { return mBrowser.application.resources.prefix + INTERFACE_NAME; } @Override public JavascriptInterface getInheritInterface(RexseeBrowser childBrowser) { return this; } @Override public JavascriptInterface getNewInterface(RexseeBrowser childBrowser) { return new RexseeSensorProximity(childBrowser); } public static final String EVENT_ONPROXIMITYCHANGED = "onProximityChanged"; private final Context mContext; private final RexseeBrowser mBrowser; private final SensorManager mSensorManager; private final SensorEventListener mSensorListener; private final Sensor mSensor; private int mRate = SensorManager.SENSOR_DELAY_NORMAL; private int mCycle = 100; //milliseconds private int mEventCycle = 100; //milliseconds private float mAccuracy = 0; private long lastUpdate = -1; private long lastEvent = -1; private float value = -999f; public RexseeSensorProximity(RexseeBrowser browser) { mContext = browser.getContext(); mBrowser = browser; browser.eventList.add(EVENT_ONPROXIMITYCHANGED); mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE); mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY); mSensorListener = new SensorEventListener() { @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override public void onSensorChanged(SensorEvent event) { if (event.sensor.getType() != Sensor.TYPE_PROXIMITY) return; long curTime = System.currentTimeMillis(); if (lastUpdate == -1 || (curTime - lastUpdate) > mCycle) { lastUpdate = curTime; float lastValue = value; value = event.values[SensorManager.DATA_X]; if (lastEvent == -1 || (curTime - lastEvent) > mEventCycle) { if (Math.abs(value - lastValue) > mAccuracy) { lastEvent = curTime; mBrowser.eventList.run(EVENT_ONPROXIMITYCHANGED); } } } } }; } public String getLastKnownValue() { return (value == -999) ? "null" : String.valueOf(value); } public void setRate(String rate) { mRate = SensorRate.getInt(rate); } public String getRate() { return SensorRate.getString(mRate); } public void setCycle(int milliseconds) { mCycle = milliseconds; } public int getCycle() { return mCycle; } public void setEventCycle(int milliseconds) { mEventCycle = milliseconds; } public int getEventCycle() { return mEventCycle; } public void setAccuracy(float value) { mAccuracy = Math.abs(value); } public float getAccuracy() { return mAccuracy; } public boolean isReady() { return (mSensor == null) ? false : true; } public void start() { if (isReady()) { mSensorManager.registerListener(mSensorListener, mSensor, mRate); } else { mBrowser.exception(getInterfaceName(), "Proximity sensor is not found."); } } public void stop() { if (isReady()) { mSensorManager.unregisterListener(mSensorListener); } } }