在做一个软件时,用到了定位功能。网上有很多关于google 的GPS定位,但网上关于google定位都没有用,
搜索下原因:(这里建议大家在中国就尽量不使用系统自带的定位)
因为Google的服务器不在中国(就算能网上关于定位的代码能用,那也非常的慢,除非你的应用是在国外使用)
由于网络等原因所以定位一般会失败
于是转向使用百度api来定位。
所用到的百度API参考地址。
取得位置的百度官方sdk参考 Android定位SDK
由坐标获取地址方法参考 Geocoding API 的 7.逆地理编码
先讲解怎么使用百度api获取获取地理坐标
准备工作:
(1)第一步,下载定位Android locSDK3.3。
下载地址:http://developer.baidu.com/map/static/doc/locSDK3.3.zip
(2)第二步,解压缩Android locSDK3.3
准备工作至此已经结束。
一、工程配置
1、第一步,在工程里新建libs文件夹,将开发包里的locSDK_3.3.jar拷贝到libs根目录下,将liblocSDK3.so拷贝到libs\armeabi目录下,拷贝完成后的工程目录如下图所示;
2、第二步(第一步导入后可以使用就不用这一步了):在工程属性->Java Build Path->Libraries中选择“Add External JARs”,选定locSDK_3.3.jar,确定后返回。
通过以上两步操作后,您就可以正常使用百度地图定位SDK为您提供的全部功能了。
在AndroidManifest.xml加入如下所示权限及server
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<
permission
android:name
=
"android.permission.BAIDU_LOCATION_SERVICE"
>
</
permission
>
<
uses-permission
android:name
=
"android.permission.BAIDU_LOCATION_SERVICE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_COARSE_LOCATION"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_FINE_LOCATION"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_WIFI_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_NETWORK_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.CHANGE_WIFI_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.READ_PHONE_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.WRITE_EXTERNAL_STORAGE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.INTERNET"
/>
<
uses-permission
android:name
=
"android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.READ_LOGS"
>
</
uses-permission
>
|
在<application></application>标签中加入baidu server
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<
service
android:name
=
"com.baidu.location.f"
android:enabled
=
"true"
android:permission
=
"android.permission.BAIDU_LOCATION_SERVICE"
android:process
=
":remote"
>
<
intent-filter
>
<
action
android:name
=
"com.baidu.location.service_v3.3"
/>
</
intent-filter
>
</
service
>
|
由于Location.java继承自Application,所以需要在配置文件中<application android:name="com.baidulocation.MainActivity" ……>节中需要加android:name,其中com.genwoxue.baidulocation为我们的包名称,Location为继承Application的类名称。
<service android:name="com.baidu.location.f" android:enabled="true" android:process=":remote"> </service>这个是来自百度定位中的服务,不可更改其中内容。
我做好的如下所示
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<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
manifest
xmlns:android
=
"http://schemas.android.com/apk/res/android"
package
=
"com.baidulocation"
android:versionCode
=
"1"
android:versionName
=
"1.0"
>
<
permission
android:name
=
"android.permission.BAIDU_LOCATION_SERVICE"
>
</
permission
>
<
uses-permission
android:name
=
"android.permission.BAIDU_LOCATION_SERVICE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_COARSE_LOCATION"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_FINE_LOCATION"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_WIFI_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.ACCESS_NETWORK_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.CHANGE_WIFI_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.READ_PHONE_STATE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.WRITE_EXTERNAL_STORAGE"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.INTERNET"
/>
<
uses-permission
android:name
=
"android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
>
</
uses-permission
>
<
uses-permission
android:name
=
"android.permission.READ_LOGS"
>
</
uses-permission
>
<
uses-sdk
android:minSdkVersion
=
"8"
android:targetSdkVersion
=
"16"
/>
<
application
android:allowBackup
=
"true"
android:icon
=
"@drawable/ic_launcher"
android:label
=
"@string/app_name"
android:theme
=
"@style/AppTheme"
>
<
activity
android:name
=
"com.baidulocation.MainActivity"
android:label
=
"@string/app_name"
>
<
intent-filter
>
<
action
android:name
=
"android.intent.action.MAIN"
/>
<
category
android:name
=
"android.intent.category.LAUNCHER"
/>
</
intent-filter
>
</
activity
>
<
service
android:name
=
"com.baidu.location.f"
android:enabled
=
"true"
android:permission
=
"android.permission.BAIDU_LOCATION_SERVICE"
android:process
=
":remote"
>
<
intent-filter
>
<
action
android:name
=
"com.baidu.location.service_v3.3"
/>
</
intent-filter
>
</
service
>
</
application
>
</
manifest
>
|
补充:安列参考
在http://blog.csdn.net/ryantang03/article/details/7951260博客中提到可以通过 Android定位SDK 直接获取地址,但是经过实验不行。或许我这地方并不有名的原因。
于是我使用 Android定位SDK 加 Geocoding API的模式来获取位置。
为了获取的地理坐标能在函数中被调用,我封装了定位函数
MyBaiduLotion.java
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package
com.baidulocation;
import
android.content.Context;
import
com.baidu.location.BDLocation;
import
com.baidu.location.BDLocationListener;
import
com.baidu.location.LocationClient;
import
com.baidu.location.LocationClientOption;
public
class
MyBaiduLotion {
Context myContext;
private
LocationClient locationClient =
null
;
private
static
final
int
UPDATE_TIME =
4000
;
private
static
int
LOCATION_COUTNS =
0
;
private
boolean
isFinish =
false
;
MyBDcoordinate myBDcoordinate =
null
;
MyLocation myLocation;
String strlocation =
""
;
public
MyBaiduLotion(Context context) {
// TODO Auto-generated constructor stub
myContext = context;
myLocation =
new
MyLocation();
initLockPst();
}
class
MyBDcoordinate{
double
Latitude;
double
Longitude;
}
private
void
initLockPst(){
locationClient =
new
LocationClient(
this
.myContext);
//设置定位条件
LocationClientOption option =
new
LocationClientOption();
option.setOpenGps(
true
);
//是否打开GPS
option.setCoorType(
"bd09ll"
);
//设置返回值的坐标类型。
option.setPriority(LocationClientOption.NetWorkFirst);
//设置定位优先级
option.setProdName(
"LocationDemo"
);
//设置产品线名称。强烈建议您使用自定义的产品线名称,方便我们以后为您提供更高效准确的定位服务。
option.setScanSpan(UPDATE_TIME);
//设置定时定位的时间间隔。单位毫秒
locationClient.setLocOption(option);
//注册位置监听器
locationClient.registerLocationListener(
new
BDLocationListener() {
@Override
public
void
onReceiveLocation(BDLocation location) {
// TODO Auto-generated method stub
if
(myBDcoordinate !=
null
){
stopOpetateClient();
//locationInfoTextView.setText("stop" + LOCATION_COUTNS);
return
;
}
if
(LOCATION_COUTNS >
5
){
stopOpetateClient();
return
;
}
if
(location ==
null
) {
LOCATION_COUTNS ++;
return
;
}
//location.getLocType();
//location.getLatitude()
//location.getLongitude();
if
(location.getLocType() !=
161
){
LOCATION_COUTNS ++;
return
;
}
myBDcoordinate =
new
MyBDcoordinate();
myBDcoordinate.Latitude = location.getLatitude();
myBDcoordinate.Longitude = location.getLongitude();
}
@Override
public
void
onReceivePoi(BDLocation location) {
}
});
}
private
void
stopOpetateClient(){
locationClient.stop();
isFinish =
true
;
}
private
void
startOpetateClient(){
locationClient.start();
/*
*当所设的整数值大于等于1000(ms)时,定位SDK内部使用定时定位模式。
*调用requestLocation( )后,每隔设定的时间,定位SDK就会进行一次定位。
*如果定位SDK根据定位依据发现位置没有发生变化,就不会发起网络请求,
*返回上一次定位的结果;如果发现位置改变,就进行网络请求进行定位,得到新的定位结果。
*定时定位时,调用一次requestLocation,会定时监听到定位结果。
*/
isFinish = false;
locationClient.requestLocation();
}
public boolean getIsFinish(){//获取定位是否完成或终止
return isFinish;
}
public void opetateClient(){//开始或停止。
if (locationClient == null) {
return;
}
if (locationClient.isStarted()) {
stopOpetateClient();
}else {
startOpetateClient();
/*
*当所设的整数值大于等于1000(ms)时,定位SDK内部使用定时定位模式。
*调用requestLocation( )后,每隔设定的时间,定位SDK就会进行一次定位。
*如果定位SDK根据定位依据发现位置没有发生变化,就不会发起网络请求,
*返回上一次定位的结果;如果发现位置改变,就进行网络请求进行定位,得到新的定位结果。
*定时定位时,调用一次requestLocation,会定时监听到定位结果。
*/
locationClient.requestLocation();
}
}
/*********************************/
public
double
getLatValue(){
//纬度
return
myBDcoordinate.Latitude;
}
public
double
getLongValue(){
//经度
return
myBDcoordinate.Longitude;
}
public
void
desClient(){
//当处在定位时Activity销毁时调用
if
(locationClient !=
null
&& locationClient.isStarted()) {
locationClient.stop();
locationClient =
null
;
}
}
}
|
下方Key的申请地址为:http://lbsyun.baidu.com/apiconsole/key
在官方的文档中关于官方说的返回的 json, 需要加个[] 再才能解析。于是直接封装了个直接有坐标获取地址的类。
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package
com.baidulocation;
import
java.io.BufferedReader;
import
java.io.InputStreamReader;
import
org.apache.http.HttpEntity;
import
org.apache.http.HttpResponse;
import
org.apache.http.client.HttpClient;
import
org.apache.http.client.methods.HttpGet;
import
org.apache.http.impl.client.DefaultHttpClient;
import
org.json.JSONArray;
import
org.json.JSONException;
import
org.json.JSONObject;
public
class
MyLocation {
String key =
"F9da85afead8b6e9c4738e5e5b79eb97"
;
public
String getAddress(String latValue, String longValue){
String location = getJsonLocation(latValue, longValue);
location = getLocation(makeResults(location));
return
location;
}
private
String getJsonLocation(String latValue, String longValue){
String urlStr =
"http://api.map.baidu.com/geocoder?location="
+ latValue +
","
+ longValue +
"&output=json&key="
+ key;
HttpClient httpClient =
new
DefaultHttpClient();
String responseData =
""
;
try
{
//向指定的URL发送Http请求
HttpResponse response = httpClient.execute(
new
HttpGet(urlStr));
//取得服务器返回的响应
HttpEntity entity = response.getEntity();
BufferedReader bufferedReader =
new
BufferedReader(
new
InputStreamReader(entity.getContent()));
String line =
""
;
while
((line = bufferedReader.readLine()) !=
null
){
responseData = responseData + line;
}
}
catch
(Exception e) {
e.printStackTrace();
}
return
responseData;
}
private
String makeResults(String result){
String dealResult = result.substring(
0
, result.indexOf(
"result"
) +
8
) +
"["
+ result.substring(result.indexOf(
"result"
) +
8
, result.length()-
1
) +
"]}"
;
return
dealResult;
}
private
String getLocation(String str){
JSONArray jsonObjs;
String location =
""
;
try
{
jsonObjs =
new
JSONObject(str).getJSONArray(
"result"
);
//取出数组中第一个json对象(本示例数组中实际只包含一个元素)
JSONObject jsonObj = jsonObjs.getJSONObject(
0
);
//解析得formatted_address值
String address = jsonObj.getString(
"formatted_address"
);
String bussiness = jsonObj.getString(
"business"
);
location = address +
":"
+ bussiness;
}
catch
(JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//取出数组中第一个json对象(本示例数组中实际只包含一个元素)
return
location;
}
}
|
1
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|
获取坐标室外会有8秒左右的延迟,所以在获取地理名称时需要等待获取坐标完成后。在主main中,定义一个线程(这里不能再直接建个类来直接获取地名了,需要在Aactivity中实现)
我的工程如下布局,主要看activity中的线程如何实现获取位置的
activity_main.xml布局如下
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<
RelativeLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
xmlns:tools
=
"http://schemas.android.com/tools"
android:layout_width
=
"match_parent"
android:layout_height
=
"match_parent"
tools:context
=
".MainActivity"
>
<
TextView
android:id
=
"@+id/tv_loc_info"
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
android:layout_alignParentBottom
=
"true"
android:layout_alignParentLeft
=
"true"
android:layout_marginBottom
=
"130dp"
android:layout_marginLeft
=
"30dp"
android:text
=
"@string/hello_world"
/>
<
Button
android:id
=
"@+id/btn_start"
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
android:layout_above
=
"@+id/tv_loc_info"
android:layout_alignLeft
=
"@+id/tv_loc_info"
android:layout_marginBottom
=
"52dp"
android:text
=
"Button"
/>
</
RelativeLayout
>
|
MainActivity.java中,主要看线程内的怎么处理获取坐标的延迟。
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package
com.baidulocation;
import
android.app.Activity;
import
android.os.Bundle;
import
android.os.Handler;
import
android.os.Message;
import
android.view.View;
import
android.view.View.OnClickListener;
import
android.widget.Button;
import
android.widget.TextView;
public
class
MainActivity
extends
Activity {
private
TextView locationInfoTextView =
null
;
private
Button startButton =
null
;
MyBaiduLotion myLotion;
MyLocation myLocation;
String strlocation =
""
;
@Override
public
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
locationInfoTextView = (TextView)
this
.findViewById(R.id.tv_loc_info);
startButton = (Button)
this
.findViewById(R.id.btn_start);
startButton.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
myLotion =
new
MyBaiduLotion(MainActivity.
this
);
myLocation =
new
MyLocation();
myLotion.opetateClient();
new
LocationTHread().start();
}
});
}
class
LocationTHread
extends
Thread{
@Override
public
void
run() {
// TODO Auto-generated method stub
super
.run();
if
(myLotion !=
null
)
while
(!myLotion.getIsFinish()){
try
{
sleep(
1000
);
}
catch
(InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if
(myLotion.myBDcoordinate !=
null
){
strlocation = myLocation.getAddress(myLotion.getLatValue() +
""
, myLotion.getLongValue() +
""
);
myHandler.sendEmptyMessage(
1
);
}
}
}
Handler myHandler =
new
Handler(){
@Override
public
void
handleMessage(Message msg) {
// TODO Auto-generated method stub
super
.handleMessage(msg);
locationInfoTextView.setText(strlocation);
}
};
@Override
protected
void
onDestroy() {
super
.onDestroy();
//myLotion.desClient();
}
}
|
在手机上运行能获取坐标(室外获取到地理名称8到10秒。室内时间更长或无法定位)(需链接网咯)
本文转自lilin9105 51CTO博客,原文链接:http://blog.51cto.com/7071976/1286797,如需转载请自行联系原作者