Android GPS获取地理位置并计算距离

核心提示：package com.qeesoft.gps;import android.app.Activity;import android.content.Context;import android.location.Criteria;import android.location.Location;import andr

package com.qeesoft.gps;

import android.app.Activity;

import android.content.Context;

import android.location.Criteria;

import android.location.Location;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class GPSSpeed extends Activity {

private Location preLocation;

private long preTime;

private static final int step=5000; //msecs

private LocationManager locationManager;

private boolean status=false;

private Button btn;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btn=(Button)findViewById(R.id.beginBtn);

btn.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

if(!status){

status=true;

startLoactionService();

btn.setText("点击这里停止");

}else{

status=false;

stopLocationService();

btn.setText("点击这里开始");

}

}

});

}

public void startLoactionService(){

String serviceName = Context.LOCATION_SERVICE;

locationManager = (LocationManager)getSystemService(serviceName);

//String provider = LocationManager.GPS_PROVIDER;

Criteria criteria = new Criteria();

criteria.setAccuracy(Criteria.ACCURACY_FINE);

criteria.setAltitudeRequired(false);

criteria.setBearingRequired(false);

criteria.setCostAllowed(true);