android通过gps获取定位的位置数据和gps经纬度

package com.action.android_test;
import android.location.location;
import android.location.locationlistener;
import android.location.locationmanager;
import android.os.bundle;
import android.app.activity;
import android.view.menu;
import android.widget.textview;

public class mainactivity extends activity {
private location location=null;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
//获得位置服务的名称
string servicename = this.location_service;
//获得位置服务的管理对象
locationmanager locationmanager = (locationmanager)getsystemservice(servicename);
// 通过gps获取定位的位置数据
location = locationmanager.getlastknownlocation(locationmanager.gps_provider);
updatetonewlocation(location);

    /**服务管理对象的监听器*/
    //参数1：定位的方式   参数2：监听更新间隔时间(ms)  参数3：监听更新的距离(m) 参数4：监听的方法
    locationmanager.requestlocationupdates(locationmanager.gps_provider, 2000, 10, new locationlistener() {

        public void onstatuschanged(string provider, int status, bundle extras) {
        }
        public void onproviderenabled(string provider) {
        }
        public void onproviderdisabled(string provider) {
        }
        public void onlocationchanged(location location) {
            updatetonewlocation(location);
        }
    });
}
private void updatetonewlocation(location location) {

    textview tv1;
    tv1 = (textview) this.findviewbyid(r.id.tv1);
    if (location != null) {
        double  latitude = location.getlatitude();
        double longitude= location.getlongitude();
        tv1.settext("经纬度为：n"+"维度：" +  latitude+ "n经度" + longitude);
    } else {
        tv1.settext("无法获取地理信息");
    }

}
@override
public boolean oncreateoptionsmenu(menu menu) {
    getmenuinflater().inflate(r.menu.main, menu);
    return true;
}