来自：http://www.cnblogs.com/coffeegg/archive/2011/10/01/2197129.html
众所周知的，在OPhone和大部分国产的Android定制机里不支持最简单实用的基站和WIFI定位，只能使用速度慢而耗电的GPS定位，但OPhone和华为/中兴生产的一些Android定制机却占据了一定的市场，因此导致了很多使用了定位技术的Andorid应用挺尴尬的。
不过其实只要明白了基站/WIFI定位的原理，自己实现基站/WIFI定位其实不难。基站定位一般有几种，第一种是利用手机附近的三个基站进行三角定位，由于每个基站的位置是固定的，利用电磁波在这三个基站间中转所需要时间来算出手机所在的坐标；第二种则是利用获取最近的基站的信息，其中包括基站id，location area code、mobile country code、mobile network code和信号强度，将这些数据发送到google的定位web服务里，就能拿到当前所在的位置信息，误差一般在几十米到几百米之内。其中信号强度这个数据很重要，网上很多所谓的手动通过基站和WIFI信息定位的方法误差大都是因为没使用信号强度而导致误差过大。高德也自己做了一个基站库，具体可以google搜索一下。
现在在一些大中型城市里，WIFI已经普及，有私人或企业的WIFI，亦有中国电信的WIFI，通过WIFI信息进行定位，并不需要真正连接上指定的WIFI路由器，只需要探测到有WIFI存在即可，因此当手机使用的不是GSM制式（因为google的基站库里并没在保存太多的CDMA基站）的时候，也可以使用WIFI进行定位，原理也和基站定位一样，必须要拿到WIFI路由器的SSID和信号强度。
由于有些用户默认是将WIFI关闭的，通过API开启WIFI硬件并进行搜索附近的WIFI路由器需要一段时间，怎样才能将手机基站定位和WIFI定位完美结合起来呢，Android提供了一种很好的机制，就是Handler和Looper，Handler和Looper一般用于跨线程传递数据，但当在单线程里使用时，就变成了一个先进先出的消息泵。利用这个消息泵进行调度，就可以将基站定位和WIFI定位完美结合。以下是相关的代码：
CellInfoManager
import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Context;
import android.telephony.CellLocation;
import android.telephony.NeighboringCellInfo;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.telephony.gsm.GsmCellLocation;
import android.util.Log;
public class CellInfoManager {
private int asu;
private int bid;
private int cid;
private boolean isCdma;
private boolean isGsm;
private int lac;
private int lat;
private final PhoneStateListener listener;
private int lng;
private int mcc;
private int mnc;
private int nid;
private int sid;
private TelephonyManager tel;
private boolean valid;
private Context context;
public CellInfoManager(Context paramContext) {
this.listener = new CellInfoListener(this);
tel = (TelephonyManager) paramContext.getSystemService(Context.TELEPHONY_SERVICE);
this.tel.listen(this.listener, PhoneStateListener.LISTEN_CELL_LOCATION | PhoneStateListener.LISTEN_SIGNAL_STRENGTH);
context = paramContext;
}
public static int dBm(int i) {
int j;
if (i >= 0 && i <= 31)
j = i * 2 + -113;
else
j = 0;
return j;
}
public int asu() {
return this.asu;
}
public int bid() {
if (!this.valid)
update();
return this.bid;
}
public JSONObject cdmaInfo() {
if (!isCdma()) {
return null;
}
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("bid", bid());
jsonObject.put("sid", sid());
jsonObject.put("nid", nid());
jsonObject.put("lat", lat());
jsonObject.put("lng", lng());
} catch (JSONException ex) {
jsonObject = null;
Log.e("CellInfoManager", ex.getMessage());
}
return jsonObject;
}
public JSONArray cellTowers() {
JSONArray jsonarray = new JSONArray();
int lat;
int mcc;
int mnc;
int aryCell[] = dumpCells();
lat = lac();
mcc = mcc();
mnc = mnc();
if (aryCell == null || aryCell.length < 2) {
aryCell = new int[2];
aryCell[0] = cid;
aryCell[1] = -60;
}
for (int i = 0; i < aryCell.length; i += 2) {
try {
int j2 = dBm(i + 1);
JSONObject jsonobject = new JSONObject();
jsonobject.put("cell_id", aryCell[i]);
jsonobject.put("location_area_code", lat);
jsonobject.put("mobile_country_code", mcc);
jsonobject.put("mobile_network_code", mnc);
jsonobject.put("signal_strength", j2);
jsonobject.put("age", 0);
jsonarray.put(jsonobject);
} catch (Exception ex) {
ex.printStackTrace();
Log.e("CellInfoManager", ex.getMessage());
}
}
if (isCdma())
jsonarray = new JSONArray();
return jsonarray;
}
public int cid() {
if (!this.valid)
update();
return this.cid;
}
public int[] dumpCells() {
int[] aryCells;
if (cid() == 0) {
aryCells = new int[0];
return aryCells;
}
List<NeighboringCellInfo> lsCellInfo = this.tel.getNeighboringCellInfo();
if (lsCellInfo == null || lsCellInfo.size() == 0) {
aryCells = new int[1];
int i = cid();
aryCells[0] = i;
return aryCells;
}
int[] arrayOfInt1 = new int[lsCellInfo.size() * 2 + 2];
int j = 0 + 1;
int k = cid();
arrayOfInt1[0] = k;
int m = j + 1;
int n = asu();
arrayOfInt1[j] = n;
Iterator<NeighboringCellInfo> iter = lsCellInfo.iterator();
while (true) {
if (!iter.hasNext()) {
break;
}
NeighboringCellInfo localNeighboringCellInfo = (NeighboringCellInfo) iter.next();
int i2 = localNeighboringCellInfo.getCid();
if ((i2 <= 0) || (i2 == 65535))
continue;
int i3 = m + 1;
arrayOfInt1[m] = i2;
m = i3 + 1;
int i4 = localNeighboringCellInfo.getRssi();
arrayOfInt1[i3] = i4;
}
int[] arrayOfInt2 = new int[m];
System.arraycopy(arrayOfInt1, 0, arrayOfInt2, 0, m);
aryCells = arrayOfInt2;
return aryCells;
}
public JSONObject gsmInfo() {
if (!isGsm()) {
return null;
}
JSONObject localObject = null;
while (true) {
try {
JSONObject localJSONObject1 = new JSONObject();
String str1 = this.tel.getNetworkOperatorName();
localJSONObject1.put("operator", str1);
String str2 = this.tel.getNetworkOperator();
if ((str2.length() == 5) || (str2.length() == 6)) {
String str3 = str2.substring(0, 3);
String str4 = str2.substring(3, str2.length());
localJSONObject1.put("mcc", str3);
localJSONObject1.put("mnc", str4);
}
localJSONObject1.put("lac", lac());
int[] arrayOfInt = dumpCells();
JSONArray localJSONArray1 = new JSONArray();
int k = 0;
int m = arrayOfInt.length / 2;
while (true) {
if (k >= m) {
localJSONObject1.put("cells", localJSONArray1);
localObject = localJSONObject1;
break;
}
int n = k * 2;
int i1 = arrayOfInt[n];
int i2 = k * 2 + 1;
int i3 = arrayOfInt[i2];
JSONObject localJSONObject7 = new JSONObject();
localJSONObject7.put("cid", i1);
localJSONObject7.put("asu", i3);
localJSONArray1.put(localJSONObject7);
k += 1;
}
} catch (JSONException localJSONException) {
localObject = null;
}
}
}
public boolean isCdma() {
if (!this.valid)
update();
return this.isCdma;
}
public boolean isGsm() {
if (!this.valid)
update();
return this.isGsm;
}
public int lac() {
if (!this.valid)
update();
return this.lac;
}
public int lat() {
if (!this.valid)
update();
return this.lat;
}
public int lng() {
if (!this.valid)
update();
return this.lng;
}
public int mcc() {
if (!this.valid)
update();
return this.mcc;
}
public int mnc() {
if (!this.valid)
update();
return this.mnc;
}
public int nid() {
if (!this.valid)
update();
return this.nid;
}
public float score() {
float f1 = 0f;
int[] aryCells = null;
int i = 0;
float f2 = 0f;
if (isCdma()) {
f2 = 1065353216;
return f2;
}
if (isGsm()) {
f1 = 0.0F;
aryCells = dumpCells();
int j = aryCells.length;
if (i >= j)
f2 = f1;
}
if(i <=0 ) {
return 1065353216;
}
int m = aryCells[i];
for (i = 0; i < m; i++) {
if ((m < 0) || (m > 31))
f1 += 0.5F;
else
f1 += 1.0F;
}
f2 = f1;
return f2;
}
public int sid() {
if (!this.valid)
update();
return this.sid;
}
public void update() {
this.isGsm = false;
this.isCdma = false;
this.cid = 0;
this.lac = 0;
this.mcc = 0;
this.mnc = 0;
CellLocation cellLocation = this.tel.getCellLocation();
int nPhoneType = this.tel.getPhoneType();
if (nPhoneType == 1 && cellLocation instanceof GsmCellLocation) {
this.isGsm = true;
GsmCellLocation gsmCellLocation = (GsmCellLocation) cellLocation;
int nGSMCID = gsmCellLocation.getCid();
if (nGSMCID > 0) {
if (nGSMCID != 65535) {
this.cid = nGSMCID;
this.lac = gsmCellLocation.getLac();
}
}
}
try {
String strNetworkOperator = this.tel.getNetworkOperator();
int nNetworkOperatorLength = strNetworkOperator.length();
if (nNetworkOperatorLength != 5) {
if (nNetworkOperatorLength != 6)
;
} else {
this.mcc = Integer.parseInt(strNetworkOperator.substring(0, 3));
this.mnc = Integer.parseInt(strNetworkOperator.substring(3, nNetworkOperatorLength));
}
if (this.tel.getPhoneType() == 2) {
this.valid = true;
Class<?> clsCellLocation = cellLocation.getClass();
Class<?>[] aryClass = new Class[0];
Method localMethod1 = clsCellLocation.getMethod("getBaseStationId", aryClass);
Method localMethod2 = clsCellLocation.getMethod("getSystemId", aryClass);
Method localMethod3 = clsCellLocation.getMethod("getNetworkId", aryClass);
Object[] aryDummy = new Object[0];
this.bid = ((Integer) localMethod1.invoke(cellLocation, aryDummy)).intValue();
this.sid = ((Integer) localMethod2.invoke(cellLocation, aryDummy)).intValue();
this.nid = ((Integer) localMethod3.invoke(cellLocation, aryDummy)).intValue();
Method localMethod7 = clsCellLocation.getMethod("getBaseStationLatitude", aryClass);
Method localMethod8 = clsCellLocation.getMethod("getBaseStationLongitude", aryClass);
this.lat = ((Integer) localMethod7.invoke(cellLocation, aryDummy)).intValue();
this.lng = ((Integer) localMethod8.invoke(cellLocation, aryDummy)).intValue();
this.isCdma = true;
}
} catch (Exception ex) {
Log.e("CellInfoManager", ex.getMessage());
}
}
class CellInfoListener extends PhoneStateListener {
CellInfoListener(CellInfoManager manager) {
}
public void onCellLocationChanged(CellLocation paramCellLocation) {
CellInfoManager.this.valid = false;
}
public void onSignalStrengthChanged(int paramInt) {
CellInfoManager.this.asu = paramInt;
}
}
}
WifiInfoManager
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.util.Log;
public class WifiInfoManager {
private WifiManager wifiManager;
public WifiInfoManager(Context paramContext) {
this.wifiManager = (WifiManager) paramContext.getSystemService(Context.WIFI_SERVICE);
}
public List<WifiInfo> dump() {
if (!this.wifiManager.isWifiEnabled()) {
return new ArrayList<WifiInfo>();
}
android.net.wifi.WifiInfo wifiConnection = this.wifiManager.getConnectionInfo();
WifiInfo currentWIFI = null;
if (wifiConnection != null) {
String s = wifiConnection.getBSSID();
int i = wifiConnection.getRssi();
String s1 = wifiConnection.getSSID();
currentWIFI = new WifiInfo(s, i, s1);
}
ArrayList<WifiInfo> lsAllWIFI = new ArrayList<WifiInfo>();
if (currentWIFI != null) {
lsAllWIFI.add(currentWIFI);
}
List<ScanResult> lsScanResult = this.wifiManager.getScanResults();
for (ScanResult result : lsScanResult) {
WifiInfo scanWIFI = new WifiInfo(result);
if (!scanWIFI.equals(currentWIFI))
lsAllWIFI.add(scanWIFI);
}
return lsAllWIFI;
}
public boolean isWifiEnabled() {
return this.wifiManager.isWifiEnabled();
}
public JSONArray wifiInfo() {
JSONArray jsonArray = new JSONArray();
for (WifiInfo wifi : dump()) {
JSONObject localJSONObject = wifi.info();
jsonArray.put(localJSONObject);
}
return jsonArray;
}
public WifiManager wifiManager() {
return this.wifiManager;
}
public JSONArray wifiTowers() {
JSONArray jsonArray = new JSONArray();
try {
Iterator<WifiInfo> localObject = dump().iterator();
while (true) {
if (!(localObject).hasNext()) {
return jsonArray;
}
jsonArray.put(localObject.next().wifi_tower());
}
} catch (Exception localException) {
Log.e("location", localException.getMessage());
}
return jsonArray;
}
public class WifiInfo implements Comparable<WifiInfo> {
public int compareTo(WifiInfo wifiinfo) {
int i = wifiinfo.dBm;
int j = dBm;
return i - j;
}
public boolean equals(Object obj) {
boolean flag = false;
if (obj == this) {
flag = true;
return flag;
} else {
if (obj instanceof WifiInfo) {
WifiInfo wifiinfo = (WifiInfo) obj;
int i = wifiinfo.dBm;
int j = dBm;
if (i == j) {
String s = wifiinfo.bssid;
String s1 = bssid;
if (s.equals(s1)) {
flag = true;
return flag;
}
}
flag = false;
} else {
flag = false;
}
}
return flag;
}
public int hashCode() {
int i = dBm;
int j = bssid.hashCode();
return i ^ j;
}
public JSONObject info() {
JSONObject jsonobject = new JSONObject();
try {
String s = bssid;
jsonobject.put("mac", s);
String s1 = ssid;
jsonobject.put("ssid", s1);
int i = dBm;
jsonobject.put("dbm", i);
} catch (Exception ex) {
}
return jsonobject;
}
public JSONObject wifi_tower() {
JSONObject jsonobject = new JSONObject();
try {
String s = bssid;
jsonobject.put("mac_address", s);
int i = dBm;
jsonobject.put("signal_strength", i);
String s1 = ssid;
jsonobject.put("ssid", s1);
jsonobject.put("age", 0);
} catch (Exception ex) {
}
return jsonobject;
}
public final String bssid;
public final int dBm;
public final String ssid;
public WifiInfo(ScanResult scanresult) {
String s = scanresult.BSSID;
bssid = s;
int i = scanresult.level;
dBm = i;
String s1 = scanresult.SSID;
ssid = s1;
}
public WifiInfo(String s, int i, String s1) {
bssid = s;
dBm = i;
ssid = s1;
}
}
}
CellLocationManager
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONObject;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.Handler;
import android.os.Message;
import android.telephony.CellLocation;
import android.util.Log;
import android.widget.Toast;
import com.google.android.photostream.UserTask;
public abstract class CellLocationManager {
public static int CHECK_INTERVAL = 15000;
public static boolean ENABLE_WIFI = true;
private static boolean IS_DEBUG = false;
private static final int STATE_COLLECTING = 2;
private static final int STATE_IDLE = 0;
private static final int STATE_READY = 1;
private static final int STATE_SENDING = 3;
private static final int MESSAGE_INITIALIZE = 1;
private static final int MESSAGE_COLLECTING_CELL = 2;
private static final int MESSAGE_COLLECTING_WIFI = 5;
private static final int MESSAGE_BEFORE_FINISH = 10;
private int accuracy;
private int bid;
private CellInfoManager cellInfoManager;
private Context context;
private boolean disableWifiAfterScan;
private int[] aryGsmCells;
private double latitude;
private double longitude;
private MyLooper looper;
private boolean paused;
private final BroadcastReceiver receiver;
private long startScanTimestamp;
private int state;
private Task task;
private long timestamp;
private boolean waiting4WifiEnable;
private WifiInfoManager wifiManager;
public CellLocationManager(Context context, CellInfoManager cellinfomanager, WifiInfoManager wifiinfomanager) {
receiver = new CellLocationManagerBroadcastReceiver();
this.context = context.getApplicationContext();
cellInfoManager = cellinfomanager;
wifiManager = wifiinfomanager;
}
private void debug(Object paramObject) {
if (IS_DEBUG) {
System.out.println(paramObject);
String str = String.valueOf(paramObject);
Toast.makeText(this.context, str, Toast.LENGTH_SHORT).show();
}
}
public int accuracy() {
return this.accuracy;
}
public double latitude() {
return this.latitude;
}
public double longitude() {
return this.longitude;
}
public abstract void onLocationChanged();
public void pause() {
if (state > 0 && !paused) {
looper.removeMessages(MESSAGE_BEFORE_FINISH);
paused = true;
}
}
public void requestUpdate() {
if (state != STATE_READY) {
return;
}
boolean bStartScanSuccessful = false;
CellLocation.requestLocationUpdate();
state = STATE_COLLECTING;
looper.sendEmptyMessage(MESSAGE_INITIALIZE);
if (wifiManager.wifiManager().isWifiEnabled()) {
bStartScanSuccessful = wifiManager.wifiManager().startScan();
waiting4WifiEnable = false;
} else {
startScanTimestamp = System.currentTimeMillis();
if (!ENABLE_WIFI || !wifiManager.wifiManager().setWifiEnabled(true)) {
int nDelay = 0;
if (!bStartScanSuccessful)
nDelay = 8000;
looper.sendEmptyMessageDelayed(MESSAGE_COLLECTING_WIFI, nDelay);
debug("CELL UPDATE");
} else {
waiting4WifiEnable = true;
}
}
}
public void resume() {
if (state > 0 && paused) {
paused = false;
looper.removeMessages(MESSAGE_BEFORE_FINISH);
looper.sendEmptyMessage(MESSAGE_BEFORE_FINISH);
}
}
public void start() {
if (state <= STATE_IDLE) {
Log.i("CellLocationManager", "Starting...");
context.registerReceiver(receiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
context.registerReceiver(receiver, new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION));
looper = new MyLooper();
state = STATE_READY;
paused = false;
waiting4WifiEnable = false;
disableWifiAfterScan = false;
debug("CELL LOCATION START");
requestUpdate();
}
}
public void stop() {
if (state > STATE_IDLE) {
context.unregisterReceiver(receiver);
debug("CELL LOCATION STOP");
looper = null;
state = STATE_IDLE;
if (disableWifiAfterScan) {
disableWifiAfterScan = false;
wifiManager.wifiManager().setWifiEnabled(false);
}
}
}
public long timestamp() {
return this.timestamp;
}
protected boolean isConnectedWithInternet() {
ConnectivityManager conManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = conManager.getActiveNetworkInfo();
if (networkInfo != null) {
return networkInfo.isAvailable();
}
return false;
}
private class MyLooper extends Handler {
private float fCellScore;
private JSONArray objCellTowersJson;
public void handleMessage(Message paramMessage) {
if(CellLocationManager.this.looper != this)
return;
boolean flag = true;
switch (paramMessage.what) {
default:
break;
case MESSAGE_INITIALIZE:
this.objCellTowersJson = null;
this.fCellScore = 1.401298E-045F;
case MESSAGE_COLLECTING_CELL:
if (CellLocationManager.this.state != CellLocationManager.STATE_COLLECTING)
break;
JSONArray objCellTowers = CellLocationManager.this.cellInfoManager.cellTowers();
float fCellScore = CellLocationManager.this.cellInfoManager.score();
if (objCellTowers != null) {
float fCurrentCellScore = this.fCellScore;
if (fCellScore > fCurrentCellScore) {
this.objCellTowersJson = objCellTowers;
this.fCellScore = fCellScore;
}
}
this.sendEmptyMessageDelayed(MESSAGE_COLLECTING_CELL, 600L);
break;
case MESSAGE_COLLECTING_WIFI:
if (CellLocationManager.this.state != CellLocationManager.STATE_COLLECTING)
break;
this.removeMessages(MESSAGE_COLLECTING_CELL);
this.removeMessages(MESSAGE_BEFORE_FINISH);
// if (CellLocationManager.this.disableWifiAfterScan && CellLocationManager.this.wifiManager.wifiManager().setWifiEnabled(true))
// CellLocationManager.this.disableWifiAfterScan = false;
CellLocationManager.this.state = CellLocationManager.STATE_SENDING;
if (CellLocationManager.this.task != null)
CellLocationManager.this.task.cancel(true);
int[] aryCell = null;
if (CellLocationManager.this.cellInfoManager.isGsm())
aryCell = CellLocationManager.this.cellInfoManager.dumpCells();
int nBid = CellLocationManager.this.cellInfoManager.bid();
CellLocationManager.this.task = new CellLocationManager.Task(aryCell, nBid);
JSONArray[] aryJsonArray = new JSONArray[2];
aryJsonArray[0] = this.objCellTowersJson;
aryJsonArray[1] = CellLocationManager.this.wifiManager.wifiTowers();
if(this.objCellTowersJson != null)
Log.i("CellTownerJSON", this.objCellTowersJson.toString());
if(aryJsonArray[1] != null)
Log.i("WIFITownerJSON", aryJsonArray[1].toString());
CellLocationManager.this.debug("Post json");
CellLocationManager.this.task.execute(aryJsonArray);
break;
case MESSAGE_BEFORE_FINISH:
if (CellLocationManager.this.state != CellLocationManager.STATE_READY || CellLocationManager.this.paused)
break;
// L7
if (CellLocationManager.this.disableWifiAfterScan && CellLocationManager.this.wifiManager.wifiManager().setWifiEnabled(false))
CellLocationManager.this.disableWifiAfterScan = false;
if (!CellLocationManager.this.cellInfoManager.isGsm()) {
// L9
if (CellLocationManager.this.bid == CellLocationManager.this.cellInfoManager.bid()) {
flag = true;
} else {
flag = false;
}
// L14
if (flag) {
requestUpdate();
} else {
this.sendEmptyMessageDelayed(10, CellLocationManager.CHECK_INTERVAL);
}
} else {
// L8
if (CellLocationManager.this.aryGsmCells == null || CellLocationManager.this.aryGsmCells.length == 0) {
// L10
flag = true;
} else {
int[] aryCells = CellLocationManager.this.cellInfoManager.dumpCells();
if (aryCells != null && aryCells.length != 0) {
// L13
int nFirstCellId = CellLocationManager.this.aryGsmCells[0];
if (nFirstCellId == aryCells[0]) {
// L16
int cellLength = CellLocationManager.this.aryGsmCells.length / 2;
List<Integer> arraylist = new ArrayList<Integer>(cellLength);
List<Integer> arraylist1 = new ArrayList<Integer>(aryCells.length / 2);
int nIndex = 0;
int nGSMCellLength = CellLocationManager.this.aryGsmCells.length;
while (nIndex < nGSMCellLength) {
// goto L18
arraylist.add(CellLocationManager.this.aryGsmCells[nIndex]);
nIndex += 2;
}
// goto L17
nIndex = 0;
while (nIndex < aryCells.length) {
// goto L20
arraylist1.add(aryCells[nIndex]);
nIndex += 2;
}
// goto L19
int nCounter = 0;
for(Iterator<Integer> iterator = arraylist.iterator(); iterator.hasNext();) {
// goto L22
if (arraylist1.contains(iterator.next()))
nCounter++;
}
// goto L21
int k4 = arraylist.size() - nCounter;
int l4 = arraylist1.size() - nCounter;
if (k4 + l4 > nCounter)
flag = true;
else
flag = false;
if (flag) {
StringBuilder stringbuilder = new StringBuilder(k4).append(" + ");
stringbuilder.append(l4).append(" > ");
stringbuilder.append(nCounter);
CellLocationManager.this.debug(stringbuilder.toString());
}
break;
} else {
// L15
flag = true;
CellLocationManager.this.debug("PRIMARY CELL CHANGED");
// goto L14
if (flag) {
requestUpdate();
} else {
this.sendEmptyMessageDelayed(MESSAGE_BEFORE_FINISH, CellLocationManager.CHECK_INTERVAL);
}
}
} else {
// L12
flag = true;
// goto L14
if (flag) {
requestUpdate();
} else {
this.sendEmptyMessageDelayed(MESSAGE_BEFORE_FINISH,CellLocationManager.CHECK_INTERVAL);
}
}
}
}
}
}
}
class Task extends UserTask<JSONArray, Void, Void> {
int accuracy;
int bid;
int[] cells;
double lat;
double lng;
long time;
public Task(int[] aryCell, int bid) {
this.time = System.currentTimeMillis();
this.cells = aryCell;
this.bid = bid;
}
public Void doInBackground(JSONArray[] paramArrayOfJSONArray) {
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("version", "1.1.0");
jsonObject.put("host", "maps.google.com");
jsonObject.put("address_language", "zh_CN");
jsonObject.put("request_address", true);
jsonObject.put("radio_type", "gsm");
jsonObject.put("carrier", "HTC");
JSONArray cellJson = paramArrayOfJSONArray[0];
jsonObject.put("cell_towers", cellJson);
JSONArray wifiJson = paramArrayOfJSONArray[1];
jsonObject.put("wifi_towers", wifiJson);
DefaultHttpClient localDefaultHttpClient = new DefaultHttpClient();
HttpPost localHttpPost = new HttpPost("http://www.google.com/loc/json");
String strJson = jsonObject.toString();
StringEntity objJsonEntity = new StringEntity(strJson);
localHttpPost.setEntity(objJsonEntity);
HttpResponse objResponse = localDefaultHttpClient.execute(localHttpPost);
int nStateCode = objResponse.getStatusLine().getStatusCode();
HttpEntity httpEntity = objResponse.getEntity();
byte[] arrayOfByte = null;
if (nStateCode / 100 == 2)
arrayOfByte = EntityUtils.toByteArray(httpEntity);
httpEntity.consumeContent();
String strResponse = new String(arrayOfByte, "UTF-8");
jsonObject = new JSONObject(strResponse);
this.lat = jsonObject.getJSONObject("location").getDouble("latitude");
this.lng = jsonObject.getJSONObject("location").getDouble("longitude");
this.accuracy = jsonObject.getJSONObject("location").getInt("accuracy");;
} catch (Exception localException) {
return null;
}
return null;
}
public void onPostExecute(Void paramVoid) {
if (CellLocationManager.this.state != CellLocationManager.STATE_SENDING || CellLocationManager.this.task != this)
return;
if ((this.lat != 0.0D) && (this.lng != 0.0D)) {
CellLocationManager.this.timestamp = this.time;
CellLocationManager.this.latitude = this.lat;
CellLocationManager.this.longitude = this.lng;
CellLocationManager.this.accuracy = this.accuracy;
CellLocationManager.this.aryGsmCells = this.cells;
CellLocationManager.this.bid = this.bid;
StringBuilder sb = new StringBuilder("CELL LOCATION DONE: (");
sb.append(this.lat).append(",").append(this.lng).append(")");
CellLocationManager.this.debug(sb.toString());
CellLocationManager.this.state = STATE_READY;
CellLocationManager.this.looper.sendEmptyMessageDelayed(MESSAGE_BEFORE_FINISH, CellLocationManager.CHECK_INTERVAL);
CellLocationManager.this.onLocationChanged();
} else {
CellLocationManager.this.task = null;
CellLocationManager.this.state = CellLocationManager.STATE_READY;
CellLocationManager.this.looper.sendEmptyMessageDelayed(MESSAGE_BEFORE_FINISH, 5000L);
}
}
}
private class CellLocationManagerBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent intent) {
// access$0 state
// 1 debug
// access$2 loop
// 3 startScanTimestamp
// 4 disableWifiAfterScan
// 5 wifimanager
if (CellLocationManager.this.state != CellLocationManager.STATE_COLLECTING)
return;
String s = intent.getAction();
if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(s)) { // goto _L4; else goto _L3
// _L3:
CellLocationManager.this.debug("WIFI SCAN COMPLETE");
CellLocationManager.this.looper.removeMessages(MESSAGE_COLLECTING_WIFI);
long lInterval = System.currentTimeMillis() - CellLocationManager.this.startScanTimestamp;
if (lInterval > 4000L)
CellLocationManager.this.looper.sendEmptyMessageDelayed(MESSAGE_COLLECTING_WIFI, 4000L);
else
CellLocationManager.this.looper.sendEmptyMessage(MESSAGE_COLLECTING_WIFI);
} else {
// _L4:
if (!CellLocationManager.this.waiting4WifiEnable)
return;
String s1 = intent.getAction();
if (!WifiManager.WIFI_STATE_CHANGED_ACTION.equals(s1))
return;
int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 4);
// _L5:
if (wifiState == WifiManager.WIFI_STATE_ENABLING) {
boolean flag2 = CellLocationManager.this.wifiManager.wifiManager().startScan();
// _L8:
CellLocationManager.this.disableWifiAfterScan = true;
CellLocationManager.this.paused = false;
// int i = flag2 ? 1 : 0;
// int nDelay = i != 0 ? 8000 : 0;
// CellLocationManager.this.looper.sendEmptyMessageDelayed(MESSAGE_COLLECTING_WIFI, nDelay);
CellLocationManager.this.debug("WIFI ENABLED");
}
}
}
}
}
调用方法：
CellInfoManager cellManager = new CellInfoManager(this);
WifiInfoManager wifiManager = new WifiInfoManager(this);
CellLocationManager locationManager = new CellLocationManager(this, cellManager, wifiManager) {
@Override
public void onLocationChanged() {
txtAutoNaviInfo.setText(this.latitude() + "-" + this.longitude());
this.stop();
}
};
locationManager.start();
如果还想同时使用GPS定位，其实也很简单，可以和FourSquare提供的BestLocationListener结合起来,将上面那段代码添加到BestLocationListener的register方法里：
public void register(LocationManager locationManager, boolean gps, Context context) {
if (DEBUG) Log.d(TAG, "Registering this location listener: " + this.toString());
long updateMinTime = SLOW_LOCATION_UPDATE_MIN_TIME;
long updateMinDistance = SLOW_LOCATION_UPDATE_MIN_DISTANCE;
if (gps) {
updateMinTime = LOCATION_UPDATE_MIN_TIME;
updateMinDistance = LOCATION_UPDATE_MIN_DISTANCE;
}
List<String> providers = locationManager.getProviders(true);
int providersCount = providers.size();
if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
setChanged();
notifyObservers(null);
}
for (int i = 0; i < providersCount; i++) {
String providerName = providers.get(i);
if (locationManager.isProviderEnabled(providerName)) {
updateLocation(locationManager.getLastKnownLocation(providerName));
}
// Only register with GPS if we've explicitly allowed it.
if (gps || !LocationManager.GPS_PROVIDER.equals(providerName)) {
locationManager.requestLocationUpdates(providerName, updateMinTime,
updateMinDistance, this);
}
}
if(cellLocationManager == null) {
CellInfoManager cellManager = new CellInfoManager(context);
WifiInfoManager wifiManager = new WifiInfoManager(context);
cellLocationManager = new CellLocationManager(context, cellManager, wifiManager) {
@Override
public void onLocationChanged() {
if ((latitude() == 0.0D) || (longitude() == 0.0D)) return;
Location result = new Location("CellLocationManager");
result.setLatitude(latitude());
result.setLongitude(longitude());
result.setAccuracy(accuracy());
onBestLocationChanged(result);
this.stop();
}
};
}
//cellLocationManager.stop();
cellLocationManager.start();
// LocationController controller = LocationController.requestLocationUpdates("", updateMinTime,updateMinDistance, this, context);
// controller.requestCurrentLocation();
}