通过Location获取Address的使用

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在来获取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:

<?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:

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;   
     }   
}  

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:

<?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:



本文转自 http://blog.csdn.net/Android_Tutor/archive/2010/06/24/5692517.aspx