通过GPS 或者wifi获取Address的使用

转自：http://blog.csdn.net/android_tutor/article/details/5692517

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:

[java]
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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>  

[java]
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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;  

     }  
}  

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:

[xhtml]
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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>   

<?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: