Android GPS GPSBasics project hacking

一、参考源码：

　　GPS Basic Example - Android Example

　　　　http://androidexample.com/GPS_Basic__-__Android_Example/index.php?view=article_discription&aid=68&aaid=93

二、Permission:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />

三、Example:

package com.example.gpsbasics;

import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import android.app.Activity;
import android.content.Context;

public class MainActivity extends Activity implements LocationListener {

private LocationManager locationManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/********** get Gps location service LocationManager object ***********/
/********** 获取GPS服务管理对象 ************/
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

/*
Parameters :
First(provider)    :  the name of the provider with which to register
:  注册的名字
Second(minTime)    :  the minimum time interval for notifications, in milliseconds. This field is only used as a hint to conserve power, and actual time between location updates may be greater or lesser than this value.
:  最小通知时间间隔，以毫秒为单位。此字段仅作为节省电力方式，并且位置更新之间的实际时间可以比该值更大或更小。
Third(minDistance) :  the minimum distance interval for notifications, in meters
:  最小间隔通知，以毫秒为单位
Fourth(listener)   :  a {#link LocationListener} whose onLocationChanged(Location) method will be called for each location update
:  每个位置更新时谁的onLocationChanged （位置）方法将被调用
*/

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
3000,   // 3 sec
10, this);

/********* After registration onLocationChanged method called periodically after each 3 sec ***********/
}

/************* Called after each 3 sec **********/
@Override
public void onLocationChanged(Location location) {

// location.getLatitude()： 纬度
// location.getLongitude(): 维度
String str = "Latitude: "+location.getLatitude()+" \nLongitude: "+location.getLongitude();
Toast.makeText(getBaseContext(), str, Toast.LENGTH_LONG).show();
Log.e("GPSBasics", "onLocationChanged.");
}

@Override
public void onProviderDisabled(String provider) {

/******** Called when User off Gps *********/

Toast.makeText(getBaseContext(), "Gps turned off ", Toast.LENGTH_LONG).show();
}

@Override
public void onProviderEnabled(String provider) {

/******** Called when User on Gps  *********/

Toast.makeText(getBaseContext(), "Gps turned on ", Toast.LENGTH_LONG).show();
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub

}
}