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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1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <TextView
8. android:id="@+id/longitude"
9. 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>
第三步:修改LocationDemo.java(增加了两个方法)代码如下:
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1. package com.android.tutor;
2. import java.util.List;
3. import java.util.Locale;
4. import com.google.android.maps.GeoPoint;
5. import android.app.Activity;
6. import android.content.Context;
7. import android.location.Address;
8. import android.location.Geocoder;
9. 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. }
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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1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="https://schemas.android.com/apk/res/android"
3. package="com.android.tutor"
4. android:versionCode="1"
5. android:versionName="1.0">
6. <application android:icon="@drawable/icon" android:label="@string/app_name">
7. <activity android:name=".LocationDemo"
8. android:label="@string/app_name">
9. <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>
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://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
OK,今天就到这里，如果有什么不明白的，或者想要源代码的，请留下问题