Rexsee API介绍:基站定位功能,Android CellLocation源码
先提示一点,不能使用用模拟器研究Android的基站定位:基站信息是来自运营商的,仿真器只能模拟网络延迟(-netdelay)、网速(-netspeed)、以及一些电话相关的操作,gsm <call|accept|busy|cancel|data|hold|list|voice|status>。还不能模拟信号。
一段基于Rexsee( http://www.rexsee.com/ )的基本示例demo,其中cid 和 lac 为经纬度。
function query(){ var loction = eval('('+rexseeCellLocation.getLastKnownLocation()+')'); var type = location.type.toLowerCase(); var mcc = parseInt(location.operator.substring(0,3)); var mnc = (type=='gsm')?parseInt(location.operator.substring(3)):location.systemId; var cid= (type=='gsm')?location.cid:location.baseStationId; var lac= (type=='gsm')?location.lac:location.networkId; var postData="{\version\":\"1.1.0\",\"host\":\maps.google.com\",\"access_token\";\"2:k7j3G6LaL6u_lafw:4iXOeOpTh1glSXe\",\"home_mobile_country_code\":"+mcc+",\"home_mobile_network_code\":"+mnc+",\"address_language\";\"zh_CN\",\"radio_type\";\""+type+"\",\"request_address\":true,\"cell_towers\":[{\"cell_id\":+cid+",\"location_area_code\":+lac+",\"mobile_aountry_code\":"+mcc+",\"mobile_network_code\":"+mnc+",\"timing_advance\":5555}]}"; alert(rexseeAjax.syncSubmit('http://www.google.com/loc/json',postData,'utf-8')); }
返回的结果是:
需要注意几个问题:
1. 如果直接用alert(rexseeCellLocation.getLastKnownLocation()); 这个方法得到的经纬度会是两个非常大的数字 所以需要通过ajax提交到"http://www.google.com/loc/json" 把所需要的经纬度返回来;
2. 开始监听,一旦位置发生变化,会触发事件onCellLocationChanged。所以,要在 onCellLocationChanged中写代码,调用你的query函数。而不是直接使用onclick测试。
Rexsee扩展函数介绍
【函数】 boolean isEnabled()
【说明】 是否正在监听基站定位的变化。
【返回】 true或false。
【参数】 无
【示例】
alert(rexseeCellLocation.isEnabled());
【函数】 boolean enable()
【说明】 开始监听,一旦位置发生变化,会触发事件onCellLocationChanged。
【返回】 true或false。
【参数】 无
【示例】
alert(rexseeCellLocation.enable());
【函数】 boolean disable()
【说明】 停止监听。
【返回】 true或false。
【参数】 无
【示例】
alert(rexseeCellLocation.disable());
【函数】 JsonObject getLastKnownLocation()
【说明】 读取基站定位数据,注意,CDMA网络和GSM网络的定位数据格式是不同的。
【返回】 JSON对象,使用eval('('+json+')')转换为JavaScript对象。
【参数】 无
【示例】
alert(rexseeCellLocation.getLastKnownLocation());
rexseeCellLocation.java源码如下:
/* * 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.location; import rexsee.core.browser.JavascriptInterface; import rexsee.core.browser.RexseeBrowser; import android.content.Context; import android.telephony.CellLocation; import android.telephony.PhoneStateListener; import android.telephony.TelephonyManager; import android.telephony.cdma.CdmaCellLocation; import android.telephony.gsm.GsmCellLocation; public class RexseeCellLocation implements JavascriptInterface { private static final String INTERFACE_NAME = "CellLocation"; @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 RexseeCellLocation(childBrowser); } public static final String EVENT_ONCELLLOCATIONCHANGED = "onCellLocationChanged"; public final Context mContext; private final RexseeBrowser mBrowser; private final int mPhoneType; private PhoneStateListener mListener = null; private CellLocation mLocation = null; public RexseeCellLocation(RexseeBrowser browser) { mContext = browser.getContext(); mBrowser = browser; browser.eventList.add(EVENT_ONCELLLOCATIONCHANGED); TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); mPhoneType = tm.getPhoneType(); } //JavaScript Interface public boolean isEnabled() { return mListener != null; } public boolean enable() { try { TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); mListener = new PhoneStateListener() { @Override public void onCellLocationChanged(CellLocation location) { mLocation = location; mBrowser.eventList.run(EVENT_ONCELLLOCATIONCHANGED); } }; tm.listen(mListener, PhoneStateListener.LISTEN_CELL_LOCATION); return true; } catch (Exception e) { mBrowser.exception(getInterfaceName(), e); return false; } } public boolean disable() { if (mListener == null) return true; try { TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); tm.listen(mListener, PhoneStateListener.LISTEN_NONE); mListener = null; return true; } catch (Exception e) { mBrowser.exception(getInterfaceName(), e); return false; } } public String getLastKnownLocation() { if (mLocation == null) return "{}"; TelephonyManager tm = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); String rtn = ""; rtn += "\"operator\":\"" + tm.getNetworkOperator() + "\""; rtn += ",\"operatorName\":\"" + tm.getNetworkOperatorName() + "\""; if (mPhoneType == TelephonyManager.PHONE_TYPE_GSM) { GsmCellLocation gsm = (GsmCellLocation) mLocation; rtn += ",\"type\":\"GSM\""; rtn += ",\"cid\":" + gsm.getCid(); rtn += ",\"lac\":" + gsm.getLac(); } else if (mPhoneType == TelephonyManager.PHONE_TYPE_CDMA) { CdmaCellLocation cdma = (CdmaCellLocation) mLocation; rtn += ",\"type\":\"CDMA\""; rtn += ",\"baseStationId\":" + cdma.getBaseStationId(); rtn += ",\"baseStationLatitude\":" + cdma.getBaseStationLatitude(); rtn += ",\"baseStationLongitude\":" + cdma.getBaseStationLongitude(); rtn += ",\"networkId\":" + cdma.getNetworkId(); rtn += ",\"systemId\":" + cdma.getSystemId(); } return "{" + rtn + "}"; } }仅对Rexsee的源码和函数事件做了整理,相关的demo或源码解析可以在Rexsee社区了解,目前Rexsee已提供了近2000个扩展,覆盖Android原生功能超过90%,且全部开放: http://www.rexsee.com/
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