利用Google接口实现基站定位

利用Google接口实现基站定位

原文URL:http://www.oschina.net/code/snippet_54100_6781

package lab.sodino.location;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.telephony.gsm.GsmCellLocation;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

/**
 * Google定位的实现.<br/>
 * Geolocation的详细信息请参见：<br/>
 * <a
 * href="http://code.google.com/apis/gears/geolocation_network_protocol.html">
 * http://code.google.com/apis/gears/geolocation_network_protocol.html</a>
 */
public class LocationAct extends Activity {
    private TextView txtInfo;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button btn = (Button) findViewById(R.id.btnStart);
        txtInfo = (TextView) findViewById(R.id.txtInfo);
        btn.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View view) {
                getLocation();
            }
        });
    }
    private void getLocation() {
        TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        GsmCellLocation gsmCell = (GsmCellLocation) tm.getCellLocation();
        int cid = gsmCell.getCid();
        int lac = gsmCell.getLac();
        String netOperator = tm.getNetworkOperator();
        int mcc = Integer.valueOf(netOperator.substring(0, 3));
        int mnc = Integer.valueOf(netOperator.substring(3, 5));
        JSONObject holder = new JSONObject();
        JSONArray array = new JSONArray();
        JSONObject data = new JSONObject();
        try {
            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");
            data.put("cell_id", cid);
            data.put("location_area_code", lac);
            data.put("mobile_countyr_code", mcc);
            data.put("mobile_network_code", mnc);
            array.put(data);
            holder.put("cell_towers", array);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost("http://www.google.com/loc/json");
        StringEntity stringEntity = null;
        try {
            stringEntity = new StringEntity(holder.toString());
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        httpPost.setEntity(stringEntity);
        HttpResponse httpResponse = null;
        try {
            httpResponse = client.execute(httpPost);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        HttpEntity httpEntity = httpResponse.getEntity();
        InputStream is = null;
        try {
            is = httpEntity.getContent();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader reader = new BufferedReader(isr);
        StringBuffer stringBuffer = new StringBuffer();
        try {
            String result = "";
            while ((result = reader.readLine()) != null) {
                stringBuffer.append(result);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("[sodino]" + stringBuffer.toString());
        txtInfo.setText(stringBuffer.toString());
    }
}