定位 - android代码库

[android]代码库
package com.hj.gps;
 
import java.io.IOException;
 
import java.util.List;
import java.util.Locale;
 
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
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.widget.TextView;
 
public class GPS extends Activity {
    public Activity self = GPS.this;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gps);
        LocationManager locationManager;
         
        String context = Context.LOCATION_SERVICE;
        locationManager = (LocationManager)getSystemService(context);
         
        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
        criteria.setAltitudeRequired(false);
        criteria.setBearingRequired(false);
        criteria.setCostAllowed(false);
        criteria.setPowerRequirement(Criteria.POWER_LOW);
         
        String provider = locationManager.getBestProvider(criteria, true);
         
        Location location = locationManager.getLastKnownLocation(provider);
         
        updateWithNewLocation(location);
         
        locationManager.requestLocationUpdates(provider, 3000, 0, locationistener);
         
    }
         
private void updateWithNewLocation(Location location) {
// TODO Auto-generated method stub
String latLongString;
TextView myLocationText = (TextView)findViewById(R.id.myLocation);
 
String addressString = "没有找到地址\n";
 
if(location!=null){
    double lat  = location.getLatitude();
    double lng = location.getLongitude();
     
    latLongString = "纬度："+lat+"\n经度："+lng;
     
    double latitude  = location.getLatitude();
    double longitude = location.getLongitude();
     
    Geocoder gc = new Geocoder(self,Locale.getDefault());
     
    try {
        List<Address> addresses = gc.getFromLocation(latitude,longitude,1);
        StringBuilder sb = new StringBuilder();
         
        if(addresses.size()>0){
            Address address = addresses.get(0);
            for(int i=0;i<address.getMaxAddressLineIndex();i++){
                sb.append(address.getAddressLine(i)).append("\n");
            }
//          sb.append(address.getLocality()).append("\n");
//          sb.append(address.getLocality()).append("\n");
//          sb.append(address.getCountryName());
            addressString = sb.toString();
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}else{
    latLongString = "没有找到坐标。\n";
}
 
myLocationText.setText("您当前的坐标如下：\n"+latLongString+"\n"+addressString);
}
 
private LocationListener locationistener = new LocationListener(){
 
//当坐标改变时触发此函数
public void onLocationChanged(Location location){
    updateWithNewLocation(location);
}
//Provider禁用是触发此函数          比如GPS被关闭
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub
     
}
 
//Provider启用是触发此函数，比如Gps被打开
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub
     
}
//Provider的状态在可用、暂时不可用、和无服务三个状态直接切换时触发此函数
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub
     
}
};
 
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.gps, menu);
        return true;
    }
}
用户注册

用户登录

发表随想

该用户最新代码

编程随想

定位

[android]代码库

网友评论 (发表评论)

回复评论

发表评论：

评论须知：

扫码下载

输入口令后可复制整站源码
