1 import android.content.ContentResolver;
 2 import android.content.Context;
 3 import android.location.LocationManager;
 4 import android.provider.Settings;
 5 
 6 /**
 7  * GPS类，用来判断GPS是否开启，切换GPS状态
 8  * 在 AndroidManifest.xml中需要添加权限：
 9  * <uses-permission android:name="android.permission.WRITE_SETTINGS" />
10  * <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
11  * 在 AndroidManifest.xml中添加系统权限： android:sharedUserId="android.uid.system" 
12  * 例如：
13  * <manifest xmlns:android="http://schemas.android.com/apk/res/android"
14  *     android:sharedUserId="android.uid.system" >
15  * @author ljp 2014-1-11
16  *
17  */
18 public class GPS {
19     /**
20      * Gets the state of GPS location.
21      * 
22      * @param context
23      * @return true if enabled.
24      */
25     public static boolean getGpsState(Context context) {
26         ContentResolver resolver = context.getContentResolver();
27         boolean open = Settings.Secure.isLocationProviderEnabled(resolver,
28                 LocationManager.GPS_PROVIDER);
29         System.out.println("getGpsState:" + open);
30         return open;
31     }
32 
33     /**
34      * Toggles the state of GPS.
35      * 
36      * @param context
37      */
38     public static void toggleGps(Context context) {
39         ContentResolver resolver = context.getContentResolver();
40         boolean enabled = getGpsState(context);
41         Settings.Secure.setLocationProviderEnabled(resolver,
42                 LocationManager.GPS_PROVIDER, !enabled);
43     }
44 }