Android Google Api 获取地址

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.


第一步新建一个Android工程LocationDemo，

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

    package cn.caiwb.address
    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库

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