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gps定位

2016-04-05 16:58 169 查看
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/myLoctionText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="22dip"
android:text="@string/hello"
/>
</LinearLayout>


package com.zhou.activity;

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.widget.TextView;

public class WhereAmIActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

//声明LocationManager对象
LocationManager loctionManager;
String contextService=Context.LOCATION_SERVICE;
//通过系统服务,取得LocationManager对象
loctionManager=(LocationManager) getSystemService(contextService);

//通过GPS位置提供器获得位置
//        String provider=LocationManager.GPS_PROVIDER;
//        Location location = loctionManager.getLastKnownLocation(provider);

//使用标准集合,让系统自动选择可用的最佳位置提供器,提供位置
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);//高精度
criteria.setAltitudeRequired(false);//不要求海拔
criteria.setBearingRequired(false);//不要求方位
criteria.setCostAllowed(true);//允许有花费
criteria.setPowerRequirement(Criteria.POWER_LOW);//低功耗

//从可用的位置提供器中,匹配以上标准的最佳提供器
String provider = loctionManager.getBestProvider(criteria, true);

//获得最后一次变化的位置
Location location = loctionManager.getLastKnownLocation(provider);

//显示在TextView中
updateWithNewLocation(location);

//监听位置变化,2秒一次,距离10米以上
loctionManager.requestLocationUpdates(provider, 2000, 10, locationListener);
}

//位置监听器
private final LocationListener locationListener = new LocationListener() {
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
//当位置变化时触发
@Override
public void onLocationChanged(Location location) {
//使用新的location更新TextView显示
updateWithNewLocation(location);
}
};

//将位置信息显示在TextView中
private void updateWithNewLocation(Location location) {
String latLongString;
TextView myLoctionText;
myLoctionText=(TextView) findViewById(R.id.myLoctionText);
if(location!=null){
double lat=location.getLatitude();
double lng=location.getLongitude();
latLongString = "Lat(纬度): "+lat+"\nLong(经度): "+lng;
}else{
latLongString="没找到位置";
}
myLoctionText.setText("您当前的位置是:\n"+latLongString);
}
}


<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
第二种:
<pre name="code" class="java">package com.example.aaaa;

import java.util.Calendar;
import java.util.Iterator;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.GpsSatellite;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.widget.TextView;
import android.provider.Settings;
import android.widget.Toast;

public class MainActivity extends Activity {
private EditText editText;
private TextView logText;
private LocationManager lm;
private static final String TAG="GpsActivity";
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
lm.removeUpdates(locationListener);
}

private void setLog(String txt){
printTime();
setLogInfo(txt);
}

private void setLogInfo(String txt){
logText.setText(txt+"\n"+"--------------------\n"+logText.getText());
}

private void printTime(){
Calendar ca = Calendar.getInstance();
int year = ca.get(Calendar.YEAR);//获取年份
int month=ca.get(Calendar.MONTH);//获取月份
int day=ca.get(Calendar.DATE);//获取日
int minute=ca.get(Calendar.MINUTE);//分
int hour=ca.get(Calendar.HOUR);//小时
int second=ca.get(Calendar.SECOND);//秒
int WeekOfYear = ca.get(Calendar.DAY_OF_WEEK);

setLogInfo("当前日期:" + year +"年"+ month +"月"+ day + "日");
setLogInfo(">>>" + hour +"时"+ minute +"分"+ second +"秒");
}

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

editText=(EditText)findViewById(R.id.editText);
logText=(TextView) this.findViewById(R.id.logText);

lm=(LocationManager)getSystemService(Context.LOCATION_SERVICE);

//判断GPS是否正常启动
if(!lm.isProviderEnabled(LocationManager.GPS_PROVIDER)){
Toast.makeText(this, "请开启GPS导航...", Toast.LENGTH_SHORT).show();
setLog("请开启GPS导航...");
//返回开启GPS导航设置界面
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivityForResult(intent,0);
return;
}

//为获取地理位置信息时设置查询条件
String bestProvider = lm.getBestProvider(getCriteria(), true);
//获取位置信息
//如果不设置查询要求,getLastKnownLocation方法传人的参数为LocationManager.GPS_PROVIDER
Location location= lm.getLastKnownLocation(bestProvider);
updateView(location);
//监听状态
lm.addGpsStatusListener(listener);
//绑定监听,有4个参数
//参数1,设备:有GPS_PROVIDER和NETWORK_PROVIDER两种
//参数2,位置信息更新周期,单位毫秒
//参数3,位置变化最小距离:当位置距离变化超过此值时,将更新位置信息
//参数4,监听
//备注:参数2和3,如果参数3不为0,则以参数3为准;参数3为0,则通过时间来定时更新;两者为0,则随时刷新

// 1秒更新一次,或最小位移变化超过1米更新一次;
//注意:此处更新准确度非常低,推荐在service里面启动一个Thread,在run中sleep(10000);然后执行handler.sendMessage(),更新位置
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locationListener);
}

//位置监听
private LocationListener locationListener=new LocationListener() {

/**
* 位置信息变化时触发
*/
public void onLocationChanged(Location location) {
updateView(location);
Log.i(TAG, "时间:"+location.getTime());
Log.i(TAG, "经度:"+location.getLongitude());
Log.i(TAG, "纬度:"+location.getLatitude());
Log.i(TAG, "海拔:"+location.getAltitude());

setLog( "时间:"+location.getTime());
setLog( "经度:"+location.getLongitude());
setLog( "纬度:"+location.getLatitude());
setLog( "海拔:"+location.getAltitude());
}

/**
* GPS状态变化时触发
*/
public void onStatusChanged(String provider, int status, Bundle extras) {
switch (status) {
//GPS状态为可见时
case LocationProvider.AVAILABLE:
Log.i(TAG, "当前GPS状态为可见状态");

setLog("当前GPS状态为可见状态");
break;
//GPS状态为服务区外时
case LocationProvider.OUT_OF_SERVICE:
Log.i(TAG, "当前GPS状态为服务区外状态");
setLog("当前GPS状态为服务区外状态");
break;
//GPS状态为暂停服务时
case LocationProvider.TEMPORARILY_UNAVAILABLE:
Log.i(TAG, "当前GPS状态为暂停服务状态");
setLog("当前GPS状态为暂停服务状态");
break;
}
}

/**
* GPS开启时触发
*/
public void onProviderEnabled(String provider) {
Location location=lm.getLastKnownLocation(provider);
updateView(location);
}

/**
* GPS禁用时触发
*/
public void onProviderDisabled(String provider) {
updateView(null);
}

};

//状态监听
GpsStatus.Listener listener = new GpsStatus.Listener() {
public void onGpsStatusChanged(int event) {
switch (event) {
//第一次定位
case GpsStatus.GPS_EVENT_FIRST_FIX:
Log.i(TAG, "第一次定位");
setLog("第一次定位");
break;
//卫星状态改变
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
Log.i(TAG, "卫星状态改变");
setLog("卫星状态改变");
//获取当前状态
GpsStatus gpsStatus=lm.getGpsStatus(null);
//获取卫星颗数的默认最大值
int maxSatellites = gpsStatus.getMaxSatellites();
//创建一个迭代器保存所有卫星
Iterator<GpsSatellite> iters = gpsStatus.getSatellites().iterator();
int count = 0;
while (iters.hasNext() && count <= maxSatellites) {
GpsSatellite s = iters.next();
count++;
}
System.out.println("搜索到:"+count+"颗卫星");
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locationListener);
setLog("搜索到:"+count+"颗卫星");
break;
//定位启动
case GpsStatus.GPS_EVENT_STARTED:
Log.i(TAG, "定位启动");
setLog("定位启动");
break;
//定位结束
case GpsStatus.GPS_EVENT_STOPPED:
Log.i(TAG, "定位结束");
setLog("定位结束");
break;
}
};
};

/**
* 实时更新文本内容
*
* @param location
*/
private void updateView(Location location){
if(location!=null){
editText.setText("设备位置信息\n\n经度:");
editText.append(String.valueOf(location.getLongitude()));
editText.append("\n纬度:");
editText.append(String.valueOf(location.getLatitude()));
}else{
//清空EditText对象
editText.getEditableText().clear();
}
}

/**
* 返回查询条件
* @return
*/
private Criteria getCriteria(){
Criteria criteria=new Criteria();
//设置定位精确度 Criteria.ACCURACY_COARSE比较粗略,Criteria.ACCURACY_FINE则比较精细
criteria.setAccuracy(Criteria.ACCURACY_FINE);
//设置是否要求速度
criteria.setSpeedRequired(false);
// 设置是否允许运营商收费
criteria.setCostAllowed(false);
//设置是否需要方位信息
criteria.setBearingRequired(false);
//设置是否需要海拔信息
criteria.setAltitudeRequired(false);
// 设置对电源的需求
criteria.setPowerRequirement(Criteria.POWER_LOW);
return criteria;
}
}


<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<EditText
android:id="@+id/editText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:editable="false" />

<TextView
android:id="@+id/logText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="300dp" />
</LinearLayout>

</ScrollView>
权限同上


                                            
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