利用Google接口实现基站定位 android开发教程
1. [代码]LocationAct.java
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());
}
}
2. [代码]权限设定
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
3. [图片] 1.jpg
