程序的作用是通过WIFI定位你当前所在位置。
主要参考的文章是：http://www.cnblogs.com/rayee/archive/2012/02/02/2336101.html
写得十分清晰，最终效果也比android develop上的要好。
但代码还是有一些小问题，原程序在点击按钮之后ProgressDialog无法显示，增加一个
还加了一个TextView来显示经纬度。
贴代码
LauncherActivity.java
package com.android.demo; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.content.Intent; import android.os.Bundle; public class LauncherActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.launcher); Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { // TODO Auto-generated method stub Intent goIntent = new Intent(); goIntent.setClass(LauncherActivity.this, DemoActivity.class); startActivity(goIntent); } }, 3*1000); } }
DemoActivity.java
package com.android.demo; import java.io.BufferedReader; import java.io.InputStreamReader; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONArray; import org.json.JSONObject; import android.app.Activity; import android.app.ProgressDialog; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.telephony.TelephonyManager; import android.telephony.gsm.GsmCellLocation; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import android.view.View.OnClickListener; public class DemoActivity extends Activity { private MyHandler myHandler; private SCell cell; private ProgressDialog mProgressDialog; /** 根据基站数据获取经纬度 */ private SItude itude; /** 获取地理位置 */ private String location; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); /** 为按钮绑定事件 */ Button btnGetLocation = (Button) findViewById(R.id.button1); btnGetLocation.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub onBtnClick(); } }); } /** 基站信息结构体 */ public class SCell{ public int MCC; public int MNC; public int LAC; public int CID; } /** 经纬度信息结构体 */ public class SItude{ public String latitude; public String longitude; } /** 按钮点击回调函数 */ private void onBtnClick() { /** 弹出一个等待状态的框 */ myHandler=new MyHandler(); Toast.makeText(getApplicationContext(), "Ha", Toast.LENGTH_SHORT).show(); mProgressDialog = new ProgressDialog(this); mProgressDialog.setMessage("正在获取中..."); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); mProgressDialog.show(); MyThread m = new MyThread(); new Thread(m).start(); } /** * 获取基站信息 * * @throws Exception */ private SCell getCellInfo() throws Exception { SCell cell = new SCell(); /** 调用API获取基站信息 */ TelephonyManager mTelNet = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); GsmCellLocation location = (GsmCellLocation) mTelNet.getCellLocation(); if (location == null) throw new Exception("获取基站信息失败"); String operator = mTelNet.getNetworkOperator(); int mcc = Integer.parseInt(operator.substring(0, 3)); int mnc = Integer.parseInt(operator.substring(3)); int cid = location.getCid(); int lac = location.getLac(); /** 将获得的数据放到结构体中 */ cell.MCC = mcc; cell.MNC = mnc; cell.LAC = lac; cell.CID = cid; return cell; } /** * 获取经纬度 * * @throws Exception */ private SItude getItude(SCell cell) throws Exception { SItude itude = new SItude(); /** 采用Android默认的HttpClient */ HttpClient client = new DefaultHttpClient(); /** 采用POST方法 */ HttpPost post = new HttpPost("http://www.google.com/loc/json"); try { /** 构造POST的JSON数据 */ JSONObject holder = new JSONObject(); holder.put("version", "1.1.0"); holder.put("host", "maps.google.com"); holder.put("address_language", "zh_CN"); holder.put("request_address", true); holder.put("radio_type", "gsm"); holder.put("carrier", "HTC"); JSONObject tower = new JSONObject(); tower.put("mobile_country_code", cell.MCC); tower.put("mobile_network_code", cell.MNC); tower.put("cell_id", cell.CID); tower.put("location_area_code", cell.LAC); JSONArray towerarray = new JSONArray(); towerarray.put(tower); holder.put("cell_towers", towerarray); StringEntity query = new StringEntity(holder.toString()); post.setEntity(query); /** 发出POST数据并获取返回数据 */ HttpResponse response = client.execute(post); HttpEntity entity = response.getEntity(); BufferedReader buffReader = new BufferedReader(new InputStreamReader(entity.getContent())); StringBuffer strBuff = new StringBuffer(); String result = null; while ((result = buffReader.readLine()) != null) { strBuff.append(result); } /** 解析返回的JSON数据获得经纬度 */ JSONObject json = new JSONObject(strBuff.toString()); JSONObject subjosn = new JSONObject(json.getString("location")); itude.latitude = subjosn.getString("latitude"); itude.longitude = subjosn.getString("longitude"); Log.i("Itude", itude.latitude + itude.longitude); } catch (Exception e) { Log.e(e.getMessage(), e.toString()); throw new Exception("获取经纬度出现错误:"+e.getMessage()); } finally{ post.abort(); client = null; } return itude; } /** * 获取地理位置 * * @throws Exception */ private String getLocation(SItude itude) throws Exception { String resultString = ""; /** 这里采用get方法，直接将参数加到URL上 */ String urlString = String.format("http://maps.google.cn/maps/geo?key=abcdefg&q=%s,%s", itude.latitude, itude.longitude); Log.i("URL", urlString); /** 新建HttpClient */ HttpClient client = new DefaultHttpClient(); /** 采用GET方法 */ HttpGet get = new HttpGet(urlString); try { /** 发起GET请求并获得返回数据 */ HttpResponse response = client.execute(get); HttpEntity entity = response.getEntity(); BufferedReader buffReader = new BufferedReader(new InputStreamReader(entity.getContent())); StringBuffer strBuff = new StringBuffer(); String result = null; while ((result = buffReader.readLine()) != null) { strBuff.append(result); } resultString = strBuff.toString(); /** 解析JSON数据，获得物理地址 */ if (resultString != null && resultString.length() > 0) { JSONObject jsonobject = new JSONObject(resultString); JSONArray jsonArray = new JSONArray(jsonobject.get("Placemark").toString()); resultString = ""; for (int i = 0; i < jsonArray.length(); i++) { resultString = jsonArray.getJSONObject(i).getString("address"); } } } catch (Exception e) { throw new Exception("获取物理位置出现错误:" + e.getMessage()); } finally { get.abort(); client = null; } return resultString; } /** 显示结果 */ private void showResult(SCell cell, String location,SItude itude) { TextView cellText = (TextView) findViewById(R.id.cellText); cellText.setText(String.format("基站信息：mcc:%d, mnc:%d, lac:%d, cid:%d", cell.MCC, cell.MNC, cell.LAC, cell.CID)); TextView locationText = (TextView) findViewById(R.id.lacationText); locationText.setText("物理位置：" + location); TextView itudeText=(TextView)findViewById(R.id.itudeText); itudeText.setText("经度："+itude.latitude+" 纬度："+itude.longitude); } class MyHandler extends Handler { public MyHandler() { } public MyHandler(Looper L) { super(L); } // 子类必须重写此方法,接管数据 @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub Log.d("MyHandler", "handleMessage......"); /** 显示结果 */ mProgressDialog.dismiss(); if(msg.arg1==1) { showResult(cell, location,itude); } super.handleMessage(msg); // 此处可以更新UI } } class MyThread implements Runnable { public void run() { Message msg = new Message(); msg.arg1=1; try { /** 获取基站数据 */ cell = getCellInfo(); /** 根据基站数据获取经纬度 */ itude = getItude(cell); /** 获取地理位置 */ location = getLocation(itude); /** 关闭对话框 */ msg.arg1=1; myHandler.sendMessage(msg); // 向Handler发送消息,更新UI } catch (InterruptedException e) { // TODO Auto-generated catch block /** 显示错误 */ TextView cellText = (TextView) findViewById(R.id.cellText); cellText.setText(e.getMessage()); Log.e("Error", e.getMessage()); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } Log.d("thread.......", "mThread........"); } } }
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