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怎样用Location获取Address
来源:互联网   发布日期:2015-09-28 16:20:08   浏览:3036次  

导读:我们获取Location的目的之一肯定是有获取这个位置的详细地址,而我们有了Location,再使用Location获取Address就相对简单多了,因为GoogleApi已经封装好了方法,我们只需呀通过Location获取GeoPoint,然后在通过......

我们获取Location的目的之一肯定是有获取这个位置的详细地址,而我们有了Location,再使用Location获取Address就相对简单多了,因为GoogleApi已经封装好了方法,我们只需呀通过Location获取GeoPoint,然后在通过GeoPoint来获取我们想要的Address。下面是我做的一个简单的Demo。

第一步:新建一个Android工程LocationDemo,注意这里选用的是(Google APIs),下面是文件目录结构:

第二步:修改main.xml(相比第十四节增加了一个address的TextView),代码如下:

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<?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/longitude"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="longitude:"

/>

<TextView

android:id="@+id/latitude"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="latitude:"

/>

<TextView

android:id="@+id/address"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

</LinearLayout>

第三步:修改LocationDemo.java(增加了两个方法)代码如下:

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package com.android.tutor;

import java.util.List;

import java.util.Locale;

import com.google.android.maps.GeoPoint;

import android.app.Activity;

import android.content.Context;

import android.location.Address;

import android.location.Geocoder;

import android.location.Location;

import android.location.LocationManager;

import android.os.Bundle;

import android.widget.TextView;

public class LocationDemo extends Activity {

private TextView longitude;

private TextView latitude;

private TextView address;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

longitude = (TextView) findViewById(R.id.longitude);

latitude = (TextView) findViewById(R.id.latitude);

address = (TextView) findViewById(R.id.address);

Location mLocation = getLocation(this);

GeoPoint gp = getGeoByLocation(mLocation);

Address mAddress = getAddressbyGeoPoint(this, gp);

longitude.setText("Longitude: " + mLocation.getLongitude());

latitude.setText("Latitude: " + mLocation.getLatitude());

address.setText("Address: " + mAddress.getCountryName() + ","

+ mAddress.getLocality());

}

// Get the Location by GPS or WIFI

public Location getLocation(Context context) {

LocationManager locMan = (LocationManager) context

.getSystemService(Context.LOCATION_SERVICE);

Location location = locMan

.getLastKnownLocation(LocationManager.GPS_PROVIDER);

if (location == null) {

location = locMan

.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

}

return location;

}

// 通过Location获取GeoPoint

public GeoPoint getGeoByLocation(Location location) {

GeoPoint gp = null;

try {

if (location != null) {

double geoLatitude = location.getLatitude() * 1E6;

double geoLongitude = location.getLongitude() * 1E6;

gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);

}

} catch (Exception e) {

e.printStackTrace();

}

return gp;

}

// 通过GeoPoint来获取Address

public Address getAddressbyGeoPoint(Context cntext, GeoPoint gp) {

Address result = null;

try {

if (gp != null) {

Geocoder gc = new Geocoder(cntext, Locale.CHINA);

double geoLatitude = (int) gp.getLatitudeE6() / 1E6;

double geoLongitude = (int) gp.getLongitudeE6() / 1E6;

List<address> lstAddress = gc.getFromLocation(geoLatitude,

geoLongitude, 1);

if (lstAddress.size() > 0) {

result = lstAddress.get(0);

}

}

} catch (Exception e) {

e.printStackTrace();

}

return result;

}

}

</address>

第四步:最重要一步在AndroidManiefest.xml中导入Google Api(第14行代码)库,代码如下:

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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.android.tutor" android:versionCode="1"

android:versionName="1.0">

<application android:icon="@drawable/icon"android:label="@string/app_name">

<activity android:name=".LocationDemo"android:label="@string/app_name">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<uses-library android:name="com.google.android.maps" />

</application>

<uses-sdk android:minSdkVersion="7" />

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

</manifest>

第五步:运行上述工程,效果如下图如示:

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相关热词: Location 获取Address

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