通过Location获取Address的使用！

大家好，上一节我讲了一下如何通过LocationManager来获取Location，没有看过上一节的同学，可以点击如下链接返回查看：

Android高手进阶教程十四之---Android Location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:

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01.<?xml version="1.0" encoding="utf-8"?>     
02.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    
03.    android:orientation="vertical"    
04.    android:layout_width="fill_parent"    
05.    android:layout_height="fill_parent"    
06.    >     
07.<TextView      
08.    android:id="@+id/longitude"      
09.    android:layout_width="fill_parent"      
10.    android:layout_height="wrap_content"      
11.    android:text="longitude:"    
12.    />     
13.<TextView     
14.    android:id="@+id/latitude"       
15.    android:layout_width="fill_parent"      
16.    android:layout_height="wrap_content"      
17.    android:text="latitude:"    
18.    />     
19.<TextView     
20.    android:id="@+id/address"       
21.    android:layout_width="fill_parent"      
22.    android:layout_height="wrap_content"      
23.    />     
24.</LinearLayout>   
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01.<?xml version="1.0" encoding="utf-8"?>     
02.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    
03.    android:orientation="vertical"    
04.    android:layout_width="fill_parent"    
05.    android:layout_height="fill_parent"    
06.    >     
07.<TextView      
08.    android:id="@+id/longitude"      
09.    android:layout_width="fill_parent"      
10.    android:layout_height="wrap_content"      
11.    android:text="longitude:"    
12.    />     
13.<TextView     
14.    android:id="@+id/latitude"       
15.    android:layout_width="fill_parent"      
16.    android:layout_height="wrap_content"      
17.    android:text="latitude:"    
18.    />     
19.<TextView     
20.    android:id="@+id/address"       
21.    android:layout_width="fill_parent"      
22.    android:layout_height="wrap_content"      
23.    />     
24.</LinearLayout>   
<?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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01.package com.android.tutor;     
02.import java.util.List;     
03.import java.util.Locale;     
04.import com.google.android.maps.GeoPoint;     
05.import android.app.Activity;     
06.import android.content.Context;     
07.import android.location.Address;     
08.import android.location.Geocoder;     
09.import android.location.Location;     
10.import android.location.LocationManager;     
11.import android.os.Bundle;     
12.import android.widget.TextView;     
13.public class LocationDemo extends Activity {     
14.        
15.    private TextView longitude;     
16.    private TextView latitude;     
17.    private TextView address;     
18.    @Override    
19.    public void onCreate(Bundle savedInstanceState) {     
20.        super.onCreate(savedInstanceState);     
21.        setContentView(R.layout.main);     
22.             
23.        longitude = (TextView)findViewById(R.id.longitude);     
24.        latitude = (TextView)findViewById(R.id.latitude);     
25.        address = (TextView)findViewById(R.id.address);     
26.             
27.        Location mLocation = getLocation(this);     
28.        GeoPoint gp = getGeoByLocation(mLocation);     
29.        Address mAddress = getAddressbyGeoPoint(this, gp);     
30.         
31.             
32.             
33.        longitude.setText("Longitude: " + mLocation.getLongitude());     
34.        latitude.setText("Latitude: " + mLocation.getLatitude());     
35.        address.setText("Address: " + mAddress.getCountryName()+"," + mAddress.getLocality());     
36.    }     
37.         
38.    //Get the Location by GPS or WIFI     
39.    public Location getLocation(Context context) {     
40.        LocationManager locMan = (LocationManager) context     
41.                .getSystemService(Context.LOCATION_SERVICE);     
42.        Location location = locMan     
43.                .getLastKnownLocation(LocationManager.GPS_PROVIDER);     
44.        if (location == null) {     
45.            location = locMan     
46.                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);     
47.        }     
48.        return location;     
49.    }     
50.    //通过Location获取GeoPoint     
51.     public  GeoPoint getGeoByLocation(Location location) {     
52.         GeoPoint gp = null;     
53.         try {     
54.             if (location != null) {     
55.                 double geoLatitude = location.getLatitude() * 1E6;     
56.                 double geoLongitude = location.getLongitude() * 1E6;     
57.                 gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);     
58.             }     
59.         } catch (Exception e) {     
60.             e.printStackTrace();     
61.         }     
62.         return gp;     
63.     }     
64.     //通过GeoPoint来获取Address     
65.     public  Address getAddressbyGeoPoint(Context cntext, GeoPoint gp) {     
66.         Address result = null;     
67.         try {     
68.             if (gp != null) {     
69.                 Geocoder gc = new Geocoder(cntext, Locale.CHINA);     
70.                     
71.                 double geoLatitude = (int) gp.getLatitudeE6() / 1E6;     
72.                 double geoLongitude = (int) gp.getLongitudeE6() / 1E6;     
73.                      
74.                 List<Address> lstAddress = gc.getFromLocation(geoLatitude,     
75.                         geoLongitude, 1);     
76.                 if (lstAddress.size() > 0) {     
77.                     result = lstAddress.get(0);     
78.                 }     
79.             }     
80.         } catch (Exception e) {     
81.             e.printStackTrace();     
82.         }     
83.         return result;     
84.     }     
85.}   
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01.package com.android.tutor;     
02.import java.util.List;     
03.import java.util.Locale;     
04.import com.google.android.maps.GeoPoint;     
05.import android.app.Activity;     
06.import android.content.Context;     
07.import android.location.Address;     
08.import android.location.Geocoder;     
09.import android.location.Location;     
10.import android.location.LocationManager;     
11.import android.os.Bundle;     
12.import android.widget.TextView;     
13.public class LocationDemo extends Activity {     
14.        
15.    private TextView longitude;     
16.    private TextView latitude;     
17.    private TextView address;     
18.    @Override    
19.    public void onCreate(Bundle savedInstanceState) {     
20.        super.onCreate(savedInstanceState);     
21.        setContentView(R.layout.main);     
22.             
23.        longitude = (TextView)findViewById(R.id.longitude);     
24.        latitude = (TextView)findViewById(R.id.latitude);     
25.        address = (TextView)findViewById(R.id.address);     
26.             
27.        Location mLocation = getLocation(this);     
28.        GeoPoint gp = getGeoByLocation(mLocation);     
29.        Address mAddress = getAddressbyGeoPoint(this, gp);     
30.         
31.             
32.             
33.        longitude.setText("Longitude: " + mLocation.getLongitude());     
34.        latitude.setText("Latitude: " + mLocation.getLatitude());     
35.        address.setText("Address: " + mAddress.getCountryName()+"," + mAddress.getLocality());     
36.    }     
37.         
38.    //Get the Location by GPS or WIFI     
39.    public Location getLocation(Context context) {     
40.        LocationManager locMan = (LocationManager) context     
41.                .getSystemService(Context.LOCATION_SERVICE);     
42.        Location location = locMan     
43.                .getLastKnownLocation(LocationManager.GPS_PROVIDER);     
44.        if (location == null) {     
45.            location = locMan     
46.                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);     
47.        }     
48.        return location;     
49.    }     
50.    //通过Location获取GeoPoint     
51.     public  GeoPoint getGeoByLocation(Location location) {     
52.         GeoPoint gp = null;     
53.         try {     
54.             if (location != null) {     
55.                 double geoLatitude = location.getLatitude() * 1E6;     
56.                 double geoLongitude = location.getLongitude() * 1E6;     
57.                 gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);     
58.             }     
59.         } catch (Exception e) {     
60.             e.printStackTrace();     
61.         }     
62.         return gp;     
63.     }     
64.     //通过GeoPoint来获取Address     
65.     public  Address getAddressbyGeoPoint(Context cntext, GeoPoint gp) {     
66.         Address result = null;     
67.         try {     
68.             if (gp != null) {     
69.                 Geocoder gc = new Geocoder(cntext, Locale.CHINA);     
70.                     
71.                 double geoLatitude = (int) gp.getLatitudeE6() / 1E6;     
72.                 double geoLongitude = (int) gp.getLongitudeE6() / 1E6;     
73.                      
74.                 List<Address> lstAddress = gc.getFromLocation(geoLatitude,     
75.                         geoLongitude, 1);     
76.                 if (lstAddress.size() > 0) {     
77.                     result = lstAddress.get(0);     
78.                 }     
79.             }     
80.         } catch (Exception e) {     
81.             e.printStackTrace();     
82.         }     
83.         return result;     
84.     }     
85.}   
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:

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01.<?xml version="1.0" encoding="utf-8"?>    
02.<manifest xmlns:android="http://schemas.android.com/apk/res/android"    
03.      package="com.android.tutor"    
04.      android:versionCode="1"    
05.      android:versionName="1.0">    
06.    <application android:icon="@drawable/icon" android:label="@string/app_name">    
07.        <activity android:name=".LocationDemo"    
08.                  android:label="@string/app_name">    
09.            <intent-filter>    
10.                <action android:name="android.intent.action.MAIN" />    
11.                <category android:name="android.intent.category.LAUNCHER" />    
12.            </intent-filter>    
13.        </activity>    
14.        <uses-library android:name="com.google.android.maps" />      
15.    </application>    
16.    <uses-sdk android:minSdkVersion="7" />    
17.    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>    
18.</manifest>    
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01.<?xml version="1.0" encoding="utf-8"?>    
02.<manifest xmlns:android="http://schemas.android.com/apk/res/android"    
03.      package="com.android.tutor"    
04.      android:versionCode="1"    
05.      android:versionName="1.0">    
06.    <application android:icon="@drawable/icon" android:label="@string/app_name">    
07.        <activity android:name=".LocationDemo"    
08.                  android:label="@string/app_name">    
09.            <intent-filter>    
10.                <action android:name="android.intent.action.MAIN" />    
11.                <category android:name="android.intent.category.LAUNCHER" />    
12.            </intent-filter>    
13.        </activity>    
14.        <uses-library android:name="com.google.android.maps" />      
15.    </application>    
16.    <uses-sdk android:minSdkVersion="7" />    
17.    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>    
18.</manifest>