DSALK Android传感器API之：温度传感器SensorTemperature功能源码

个人觉得温度传感器的应用频率应该不会太高，这也是部分Android手机直接将这个功能屏蔽掉的原因所在。不过从创意角度出发，基于这个传感器可以开发出一些有意思的应用，比如手机温度计、室温监测等等。。

个性化的应用就不说了，具体的说实话我也没做，只是把Rexsee的功能源码分享出来，回头要是有应用了再分享。和之前的帖子里提到的一 样，Android平台带有大量的传感器功能，相关的原生源码可以在Rexsee的开源社区找到：http://www./

SensorTemperature功能源码如下

标签： Android Rexsee

代码片段(1)

[代码] RexseeSensorTemperature.java

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001

/*

002	* Copyright (C) 2011 The Rexsee Open Source Project

003

*

004	* Licensed under the Rexsee License, Version 1.0 (the "License");

005	* you may not use this file except in compliance with the License.

006	* You may obtain a copy of the License at

007

*

008	*      http://www./CN/legal/license.html

009

*

010	* Unless required by applicable law or agreed to in writing, software

011	* distributed under the License is distributed on an "AS IS" BASIS,

012	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

013	* See the License for the specific language governing permissions and

014	* limitations under the License.

015

*/

016

017	package rexsee.sensor;

018

019	import rexsee.core.browser.JavascriptInterface;

020	import rexsee.core.browser.RexseeBrowser;

021	import android.content.Context;

022	import android.hardware.Sensor;

023	import android.hardware.SensorEvent;

024	import android.hardware.SensorEventListener;

025	import android.hardware.SensorManager;

026

027	public class RexseeSensorTemperature implements JavascriptInterface {

028

029	private static final String INTERFACE_NAME = "Temperature";

030

@Override

031	public String getInterfaceName() {

032	return mBrowser.application.resources.prefix + INTERFACE_NAME;

033

}

034

@Override

035	public JavascriptInterface getInheritInterface(RexseeBrowser childBrowser) {

036	return this;

037

}

038

@Override

039	public JavascriptInterface getNewInterface(RexseeBrowser childBrowser) {

040	return new RexseeSensorTemperature(childBrowser);

041

}

042

043	public static final String EVENT_ONTEMPERATURECHANGED = "onTemperatureChanged";

044

045	private final Context mContext;

046	private final RexseeBrowser mBrowser;

047	private final SensorManager mSensorManager;

048	private final SensorEventListener mSensorListener;

049	private final Sensor mSensor;

050

051	private int mRate = SensorManager.SENSOR_DELAY_NORMAL;

052	private int mCycle = 100; //milliseconds

053	private int mEventCycle = 100; //milliseconds

054	private float mAccuracy = 0;

055

056	private long lastUpdate = -1;

057	private long lastEvent = -1;

058

059	private float value = -999f;

060

061	public RexseeSensorTemperature(RexseeBrowser browser) {

062	mContext = browser.getContext();

063	mBrowser = browser;

064	browser.eventList.add(EVENT_ONTEMPERATURECHANGED);

065

066	mSensorManager = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);

067

068	mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE);

069

070	mSensorListener = new SensorEventListener() {

071

@Override

072	public void onAccuracyChanged(Sensor sensor, int accuracy) {

073

}

074

@Override

075	public void onSensorChanged(SensorEvent event) {

076	if (event.sensor.getType() != Sensor.TYPE_TEMPERATURE) return;

077	long curTime = System.currentTimeMillis();

078	if (lastUpdate == -1 || (curTime - lastUpdate) > mCycle) {

079	lastUpdate = curTime;

080	float lastValue = value;

081	value = event.values[SensorManager.DATA_X];

082	if (lastEvent == -1 || (curTime - lastEvent) > mEventCycle) {

083	if (Math.abs(value - lastValue) > mAccuracy) {

084	lastEvent = curTime;

085	mBrowser.eventList.run(EVENT_ONTEMPERATURECHANGED);

086

}

087

}

088

}

089

}

090

};

091

092

}

093

094	public String getLastKnownValue() {

095	return (value == -999) ? "null" : String.valueOf(value);

096

}

097

098	public void setRate(String rate) {

099	mRate = SensorRate.getInt(rate);

100

}

101	public String getRate() {

102	return SensorRate.getString(mRate);

103

}

104	public void setCycle(int milliseconds) {

105	mCycle = milliseconds;

106

}

107	public int getCycle() {

108	return mCycle;

109

}

110	public void setEventCycle(int milliseconds) {

111	mEventCycle = milliseconds;

112

}

113	public int getEventCycle() {

114	return mEventCycle;

115

}

116	public void setAccuracy(float value) {

117	mAccuracy = Math.abs(value);

118

}

119	public float getAccuracy() {

120	return mAccuracy;

121

}

122

123	public boolean isReady() {

124	return (mSensor == null) ? false : true;

125

}

126	public void start() {

127	if (isReady()) {

128	mSensorManager.registerListener(mSensorListener, mSensor, mRate);

129

} else {

130	mBrowser.exception(getInterfaceName(), "Temperature sensor is not found.");

131

}

132

}

133	public void stop() {

134	if (isReady()) {

135	mSensorManager.unregisterListener(mSensorListener);

136

}

137

}

138

139

}