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java代碼實(shí)現(xiàn)定位功能 java oom定位

java中如何自動定位

自動定位需要特定的api,比如百度等。

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在需要的地方調(diào)用第三方提供的api調(diào)用定位相關(guān)代碼就好。

Java編程。 做一個(gè)定位系統(tǒng)。手機(jī)端一個(gè)程序,電腦端一個(gè)程序,手機(jī)端開啟GPS,開啟手機(jī)端程序,

說一下個(gè)人的大致思路吧,移動端可以通過調(diào)用接口去獲得當(dāng)前位置的經(jīng)緯度,然后把經(jīng)緯度信息放入數(shù)據(jù)庫,之后pc端的程序調(diào)用數(shù)據(jù)庫里的經(jīng)緯度信息就可以了。

java簡單定位及位子確定的代碼具體看補(bǔ)充

(3,4,N)

上北下南左西又東

順時(shí)針排序:北東南西

北1 東2 南3 西4

(3,4,1)

左轉(zhuǎn)1+1=2東

右轉(zhuǎn)1-1=01,則0=4西

后轉(zhuǎn)1+2=3南

可以把朝向問題看成類似約瑟夫的問題。

用數(shù)組記錄當(dāng)前坐標(biāo)X Y 及朝向。用1,2,3,4代表北東南西

左轉(zhuǎn)后,(3,4,2)

往前一步,

當(dāng)朝向不同的時(shí)候,有對應(yīng)的向前向后是改變哪個(gè)坐標(biāo)值,

寫四個(gè)朝向時(shí)候的坐標(biāo)的算法

然后調(diào)用,傳入2,則調(diào)用case=2時(shí)的動作,如果向前則~~~向后則~~~~再命令轉(zhuǎn)向則(調(diào)用處理方向改變的函數(shù))~~~~

最后輸出(,,),對最后一個(gè)兌換成“東南西北”輸出就行了

()

java如何實(shí)現(xiàn)電子地圖的定位

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 = 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;

}

ListNeighboringCellInfo lsCellInfo = this.tel.getNeighboringCellInfo();

if (lsCellInfo == null || lsCellInfo.size() == 0) {

aryCells = new int[1];

int i = cid();

aryCells[0] = i;

檢舉補(bǔ)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;

IteratorNeighboringCellInfo 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 {

檢舉補(bǔ)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();

標(biāo)題名稱:java代碼實(shí)現(xiàn)定位功能 java oom定位
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