Android开发笔记之简单基站定位程序的实现

七、运行程序

我们的编码工作已经完成了。在上面的代码中有些地方需要的引入代码没有提到，下面把完整的代码贴出来：

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.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.view.View.OnClickListener;
 
public class DemoActivity extends Activity {
  /** 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 */
    ProgressDialog mProgressDialog = new ProgressDialog(this);
    mProgressDialog.setMessage("正在获取中...");
    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
    mProgressDialog.show();
 
    try {
      /** 获取基站数据 */
      SCell cell = getCellInfo();
 
      /** 根据基站数据获取经纬度 */
      SItude itude = getItude(cell);
 
      /** 获取地理位置 */
      String location = getLocation(itude);
 
      /** 显示结果 */
      showResult(cell, location);
 
      /** 关闭对话框 */
      mProgressDialog.dismiss();
    } catch (Exception e) {
      /** 关闭对话框 */
      mProgressDialog.dismiss();
      /** 显示错误 */
      TextView cellText = (TextView) findViewById(R.id.cellText);
      cellText.setText(e.getMessage());
      Log.e("Error", e.getMessage());
    }
  }
   
  /**
   * 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.easck.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://www.easck.com/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) {
    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);
  }
}
								 
 4/6   首页 上一页 2 3 4 5 6 下一页 尾页