java如何实现电子地图的定位

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 = 0i <aryCell.lengthi += 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

检举补充回答：

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 {

检举补充回答： 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()

可以的 右边的panel使用一个浏览器类调用本地的网页文件，网页文件中使用google的js代码即可。解析GPS报文可以参考武汉大学出版的GPS原理一书，如果想加入数据库也可以，jdbc数据库驱动可以实现连接数据库功能。

通过浏览器来获取用户当前位置。基于此特性可以开发基于位置的服务应用。在获取地理位置信息前，首先浏览器都会向用户询问是否愿意共享其位置信息，待用户同意后才能使用。

Html5获取地理位置信息是通过Geolocation API提供，使用其getCurrentPosition方法，此方法中有三个参数，分别是成功获取到地理位置信息时所执行的回调函数，失败时所执行的回调函数和可选属性配置项。

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