Android base station positioning principle and implementation code

 
import java.io.BufferedReader; 
import java.io.InputStreamReader; 
import org.apache.http.HttpResponse; 
import org.apache.http.HttpStatus; 
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.content.Context; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.telephony.TelephonyManager; 
import android.telephony.gsm.GsmCellLocation; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

public class Test extends Activity { 

Context context=this; 
LinearLayout mainView=null; 
Button button=null; 
TextView tv=null; 

public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
this.setTitle(" The base station + Connected to the Internet +google Database location "); 
mainView=new LinearLayout(this); 
mainView.setOrientation(LinearLayout.VERTICAL); 
button=new Button(this); 
button.setText(" Localization testing "); 
button.setOnClickListener(new OnClickListener(){ 
@Override 
public void onClick(View v) { 
(new HttpThread(context)).start(); 
} 
}); 
mainView.addView(button,new LinearLayout.LayoutParams(-2,-2)); 
tv=new TextView(this); 
tv.setText("Hello ! \n"); 
mainView.addView(tv); 
setContentView(mainView); 
} 

class HttpThread extends Thread{ 

TelephonyManager tm=null; 
GsmCellLocation gcl=null; 
int cid=0; 
int lac=0; 
int mcc = 0; 
int mnc =0; 
StringBuffer sb=null; 

Handler handler=new Handler(){ 
public void handleMessage(Message msg) { 
switch (msg.what) { 
case 1: 
tv.append(sb.toString()); 
break; 
} 
super.handleMessage(msg); 
} 
}; 

HttpThread(Context context){ 
tm=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE); 
gcl=(GsmCellLocation) tm.getCellLocation(); 
cid=gcl.getCid(); 
lac=gcl.getLac(); 
mcc = Integer.valueOf(tm.getNetworkOperator().substring(0,3)); 
mnc = Integer.valueOf(tm.getNetworkOperator().substring(3,5)); 

sb=new StringBuffer(); 
sb.append("cid:"+cid + "\n"); 
sb.append("lac:"+lac + "\n"); 
sb.append("mcc:"+mcc + "\n"); 
sb.append("mnc:"+mnc + "\n"); 
} 

public void run(){ 
try { 
JSONObject jObject = new JSONObject(); 
jObject.put("version", "1.1.0"); 
jObject.put("host", "maps.google.com"); 
jObject.put("request_address", true); 
if (mcc == 460) { 
jObject.put("address_language", "zh_CN"); 
} else { 
jObject.put("address_language", "en_US"); 
} 
JSONArray jArray = new JSONArray(); 
JSONObject jData = new JSONObject(); 
jData.put("cell_id", cid); 
jData.put("location_area_code", lac); 
jData.put("mobile_country_code", mcc); 
jData.put("mobile_network_code", mnc); 
jArray.put(jData); 
jObject.put("cell_towers", jArray); 

DefaultHttpClient client = new DefaultHttpClient(); 
HttpPost post = new HttpPost("http://www.google.com/loc/json"); 
StringEntity se = new StringEntity(jObject.toString()); 
post.setEntity(se); 
HttpResponse resp = client.execute(post); 
BufferedReader br = null; 
if (resp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { 
sb.append(" Networking success \n"); 
br = new BufferedReader(new InputStreamReader(resp.getEntity().getContent())); 
}else{ 
sb.append(" Networking failed to obtain data !\n"); 
} 

String result = br.readLine(); 
while (result != null) { 
sb.append(result); 
result = br.readLine(); 
} 
}catch(Exception ex){ 
sb.append(ex.getMessage()); 
} 
Message msg=new Message(); 
msg.what=1; 
handler.sendMessage(msg); 
} 
} 
} 

 
<uses-permission android:name="android.permission.INTERNET"></uses-permission> 
< uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>