android项目获取经纬坐标

package com.example.zuobiao;

import java.util.List;

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 TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView) findViewById(R.id.tv);
        LocationManager manager = (LocationManager) getSystemService(LOCATION_SERVICE);
        List<String> allProviders = manager.getAllProviders();
        //第二个表示多少秒刷新，第三个表示多少米刷新都写成0表示实时刷新
        manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener() {
            //provider状态改变时候回调
            @Override
            public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
                // TODO Auto-generated method stub
                
            }
            //用户打开
            @Override
            public void onProviderEnabled(String arg0) {
                // TODO Auto-generated method stub
                
            }
            //用户关闭gps
            @Override
            public void onProviderDisabled(String arg0) {
                // TODO Auto-generated method stub
                
            }
            //变化时候调用
            @Override
            public void onLocationChanged(Location lo) {
                // TODO Auto-generated method stub
                String j = "经度"+lo.getLongitude();
                String w = "维度"+lo.getLatitude();
                String accuracy = "误差"+lo.getAccuracy();
                String altitude = "海拔"+lo.getAltitude();
                tv.setText(j+"\n"+w+"\n"+accuracy+"\n"+altitude);
            }
        });
    
    }

    
}