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.

第二步： 修改main.xml

<?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>