定位的第一个中实现 ，用 criter类实现 的职位选择

package com.studio.android.chp08.ex01;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class CurrentLocation extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.main); //选择布局，用 main 里面的布局方式

Button btv=(Button)findViewById(R.id.GoSecond);

LocationManager locationManager;
String serviceName = Context.LOCATION_SERVICE;
locationManager = (LocationManager)getSystemService(serviceName);
//String provider = LocationManager.GPS_PROVIDER;

// 用来找到最好的位置提供者
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);

/*
* 返回最能满足给定条件的供应商的名称。只有允许访问调用活动的供应商将被退回。如果有多个供应商符合标准，最佳精度返回。
* 如果没有提供符合标准的，标准是放松按照以下顺序：
*/
String provider = locationManager.getBestProvider(criteria, true);

// System.out.println("the provider is "+provider);

Location location = locationManager.getLastKnownLocation(provider);

updateWithNewLocation(location);

// 这一步实现 监听绑定 provider 是 定位方式，2000是实现多少时间改变一次， 10代表举例改变10m,locationListener 表示绑定的监听器
locationManager.requestLocationUpdates(provider, 2000, 10,
locationListener);

btv.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub

Intent intent = new Intent();
intent.setClass(CurrentLocation.this, LocationName.class);
startActivity(intent);
// finish();//停止当前的Activity,如果不写,则按返回键会跳转回原来的Activity
}

});

}
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);//地址改变
}
public void onProviderDisabled(String provider){
updateWithNewLocation(null);//地址失效
}
public void onProviderEnabled(String provider){ }

public void onStatusChanged(String provider, int status,
Bundle extras){ }
};

private void updateWithNewLocation(Location location) {
String latLongString;
TextView myLocationText;
myLocationText = (TextView)findViewById(R.id.myLocationText);
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
latLongString = "纬度:" + lat + "\n经度:" + lng;
} else {
latLongString = "无法获取地理信息";
}
myLocationText.setText("您当前的位置是:\n" +
latLongString);
}
}

/**

*/

package com.studio.android.chp08.ex01;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.widget.TextView;
/**
*
* 得到具体的 地名
* @author Administrator
*
*/
public class LocationName extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.addressname);

List<Address> addList = null;
Geocoder ge = new Geocoder(this,Locale.CHINA);
String latLongString=null;
TextView myLocationText=(TextView) findViewById(R.id.CityName);

Intent GetIntent=this.getIntent();
if(GetIntent==null){

System.out.println(" it is null");
}else if (GetIntent!=null)
System.out.println("it is not null");

try {
addList = ge.getFromLocation(26.0972567, 119.3090049, 1);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(addList!=null && addList.size()>0){
latLongString=new String();
for(int i=0; i<addList.size(); i++){
Address ad = addList.get(i);
latLongString += "\n";
latLongString +=ad.getAddressLine(0)+ad.getAddressLine(1)+ad.getAddressLine(2);

// latLongString +=ad.toString();
}
// System.out.println(" the size of is "+addList.size());
}

myLocationText.setText("您当前的位置是:\n" +latLongString);

}

}