基站定位程序

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........");   			  		}   	} }