Android 判断网络连接

 1 import android.content.Context;

 2 import android.net.ConnectivityManager;

 3 import android.net.NetworkInfo;

 4 

 5 /**

 6  * 网络工具类 添加网络状态许可：<uses-permission

 7  * android:name="android.permission.ACCESS_NETWORK_STATE"/>

 8  * 

 9  * @author benny

10  * 

11  */

12 public class NetworkUtil {

13 

14     /**

15      * 网络连接状态

16      *  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

17      * @param context

18      *            程序上下文

19      * @return true:可连接

20      */

21     public static boolean isNetworkConnected(Context context) {

22         if (context != null) {

23             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

24 

25             NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

26             if (networkInfo != null) {

27                 return networkInfo.isAvailable();

28             }

29         }

30         return false;

31     }

32 

33     /**

34      * WiFi 网络连接状态

35      *  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

36      * @param context

37      *            程序上下文

38      * @return true:可连接

39      */

40     public static boolean isWifiConnected(Context context) {

41         if (context != null) {

42             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

43 

44             NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

45             if (networkInfo != null) {

46                 return networkInfo.isAvailable();

47             }

48         }

49         return false;

50     }

51 

52     /**

53      * Mobile 网络连接状态

54      * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

55      * 

56      * @param context

57      *            程序上下文

58      * @return true:可连接

59      */

60     public static boolean isMobileConnected(Context context) {

61         if (context != null) {

62             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

63 

64             NetworkInfo networkInfo =  connectivityManager.getActiveNetworkInfo();

65             if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {

66                     return networkInfo.isAvailable();

67             }

68         }

69         return false;

70     }

71 

72     /**

73      * 获取网络连接类型

74      * @param context 程序上下文

75      * @return ConnectivityManager.TYPE_XXXX

76      */

77     public static int getConnectedType(Context context) {

78         if (context != null) {

79             ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

80             NetworkInfo mNetworkInfo = connectivityManager.getActiveNetworkInfo();

81             if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {

82                 return mNetworkInfo.getType();

83             }

84         }

85         return -1;

86     }

87 

88 }