並不是所有Android手機上都保留有距離感應器。 基於這個感應器可以有一些很不錯的小應用,比如近距離感應鎖屏、解鎖......

分享Rexsee的距離感應功能源碼,回頭可以自個兒做。。 更多的感應器API我這幾天都有陸續發出,大家可以自己搜「Android感應器API之......」,

 

SensorProximity.java全部源碼:

 

[代碼] JAVA代碼

 

/*

 

* 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);

 

}

 

}

 

}
arrow
arrow
    全站熱搜

    戮克 發表在 痞客邦 留言(0) 人氣()