android的用户定位---location使用

四个步骤：

1.添加权限

2.获取locationManager对象

3.获取locationProvider

4.绑定locationListener对象

 

 

首先在Manifest.xml中添加权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> //此为高精度--GPS定位选择

 

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>//此为精度一般--NetWork 定位可选上下2个

 

代码：

package com.example.location1;

import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Loaction extends Activity {
	
	EditText et1;
	EditText et2;
	Button bt;
	LocationManager lm;
	LocationListener listener;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        et1 = (EditText) findViewById(R.id.et1);
        et2 = (EditText) findViewById(R.id.et2);
        bt = (Button) findViewById(R.id.bt);
        bt.setText("绑定监听器");
        bt.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
		      //获得最适合的provider	  
		        Criteria cr = new Criteria();
		        //设置经度 
		        cr.setAccuracy(Criteria.ACCURACY_FINE);
		        //是否需要提供海拔信息
		        cr.setAltitudeRequired(false);
		        //设置需要方向信息
		        cr.setBearingRequired(false);
		        //设置是否产生费用
		        cr.setCostAllowed(false);
		        //设置电量高低
		        cr.setPowerRequirement(Criteria.POWER_LOW);
		        //设置速度经度
		        cr.setSpeedRequired(false);	
				
			lm = (LocationManager) Loaction.this.getSystemService(Context.LOCATION_SERVICE);
			//true 只在打开的provider中寻找 false 在所有的provider中寻找最合适的
			String provider = lm.getBestProvider(cr, false);
			System.out.println(provider);//---GPS 最合适的
			lm.requestLocationUpdates(provider, 0, 0, listener);
			}
		});
      
        listener = new LocationListener() {
			
			@Override
			public void onStatusChanged(String provider, int status, Bundle extras) {
				
			}
			
			@Override
			public void onProviderEnabled(String provider) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProviderDisabled(String provider) {
				// TODO Auto-generated method stub
			}
			
			@Override
			public void onLocationChanged(Location location) {
				double lg = location.getLongitude();
				double la = location.getLatitude();
				et1.setText(lg+"");
				et2.setText(la+"");
			}
		};
    }
    
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}