network: Android 網絡判斷

直接上代碼，沒有什麼好說的！

1. package mark.zhang;
3. import java.util.List;
5. import Android.content.Context;
6. import android.location.LocationManager;
7. import android.net.ConnectivityManager;
8. import android.net.NetworkInfo;
9. import android.telephony.TelephonyManager;
11. public class NetworkProber {
13. /**
14. * 網絡是否可用
15. *
16. * @param activity
17. * @return
18. */
19. public static boolean isNetworkAvailable(Context context) {
20. ConnectivityManager connectivity = (ConnectivityManager) context
21. .getSystemService(Context.CONNECTIVITY_SERVICE);
22. if (connectivity == null) {
23. } else {
24. NetworkInfo[] info = connectivity.getAllNetworkInfo();
25. if (info != null) {
26. for (int i = 0; i < info.length; i++) {
27. if (info[i].getState() == NetworkInfo.State.CONNECTED) {
28. return true;
29. }
30. }
31. }
32. }
33. return false;
34. }
36. /**
37. * Gps是否打開
38. *
39. * @param context
40. * @return
41. */
42. public static boolean isGpsEnabled(Context context) {
43. LocationManager locationManager = ((LocationManager) context
44. .getSystemService(Context.LOCATION_SERVICE));
45. List<String> accessibleProviders = locationManager.getProviders(true);
46. return accessibleProviders != null && accessibleProviders.size() > 0;
47. }
49. /**
50. * wifi是否打開
51. */
52. public static boolean isWifiEnabled(Context context) {
53. ConnectivityManager mgrConn = (ConnectivityManager) context
54. .getSystemService(Context.CONNECTIVITY_SERVICE);
55. TelephonyManager mgrTel = (TelephonyManager) context
56. .getSystemService(Context.TELEPHONY_SERVICE);
57. return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
58. .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
59. .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
60. }
62. /**
63. * 判斷當前網絡是否是wifi網絡
64. * if(activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE) { //判斷3G網
65. *
66. * @param context
67. * @return boolean
68. */
69. public static boolean isWifi(Context context) {
70. ConnectivityManager connectivityManager = (ConnectivityManager) context
71. .getSystemService(Context.CONNECTIVITY_SERVICE);
72. NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
73. if (activeNetInfo != null
74. && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
75. return true;
76. }
77. return false;
78. }
80. /**
81. * 判斷當前網絡是否是3G網絡
82. *
83. * @param context
84. * @return boolean
85. */
86. public static boolean is3G(Context context) {
87. ConnectivityManager connectivityManager = (ConnectivityManager) context
88. .getSystemService(Context.CONNECTIVITY_SERVICE);
89. NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
90. if (activeNetInfo != null
91. && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
92. return true;
93. }
94. return false;
95. }
96. }

另外還有兩個方法判斷網絡是否可用：

1. public static boolean isNetworkAvailable_00(Context context) {
2. ConnectivityManager cm = ((ConnectivityManager) context
3. .getSystemService(Context.CONNECTIVITY_SERVICE));
4. if (cm != null) {
5. NetworkInfo info = cm.getActiveNetworkInfo();
6. if (info != null && info.isConnectedOrConnecting()) {
7. return true;
8. }
9. }
10. return false;
11. }
13. public static boolean isNetworkAvailable_01(Context context) {
14. ConnectivityManager cm = (ConnectivityManager) context
15. .getSystemService(Context.CONNECTIVITY_SERVICE);
16. NetworkInfo network = cm.getActiveNetworkInfo();
17. if (network != null) {
18. return network.isAvailable();
19. }
20. return false;
21. }

1. public static boolean checkNet(Context context) {
3. try {
4. ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
5. if (connectivity != null) {
7. NetworkInfo info = connectivity.getActiveNetworkInfo();
8. if (info != null && info.isConnected()) {
10. if (info.getState() == NetworkInfo.State.CONNECTED) {
11. return true;
12. }
13. }
14. }
15. } catch (Exception e) {
16. return false;
17. }
18. return false;
19. }