1.XML中声明

 <receiver android:name=".NetworkConnectChangedReceiver" >

            <intent-filter>                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />                <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />                <action android:name="android.net.wifi.STATE_CHANGE" />            </intent-filter>        </receiver>

 

2.代码中注册

 IntentFilter filter = new IntentFilter();

 filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION); registerReceiver(new NetworkConnectChangedReceiver(), filter);

 

3.实现

01	package com.example.testss;

02

03	import android.content.BroadcastReceiver;

04	import android.content.Context;

05	import android.content.Intent;

06	import android.net.ConnectivityManager;

07	import android.net.NetworkInfo;

08	import android.net.NetworkInfo.State;

09	import android.net.wifi.WifiManager;

10	import android.os.Parcelable;

11	import android.util.Log;

12

13	public class NetworkConnectChangedReceiver extends BroadcastReceiver {

14

@Override

15	public void onReceive(Context context, Intent intent) {

16	if(WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) { // 这个监听wifi的打开与关闭，与wifi的连接无关

17	int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);

18	Log.e("H3c", "wifiState" + wifiState);

19	switch (wifiState) {

20	case WifiManager.WIFI_STATE_DISABLED:

21

break;

22	case WifiManager.WIFI_STATE_DISABLING:

23

break;

24

//

25

}

26

}

27	// 这个监听wifi的连接状态即是否连上了一个有效无线路由，当上边广播的状态是WifiManager.WIFI_STATE_DISABLING，和WIFI_STATE_DISABLED的时候，根本不会接到这个广播。

28	// 在上边广播接到广播是WifiManager.WIFI_STATE_ENABLED状态的同时也会接到这个广播，当然刚打开wifi肯定还没有连接到有效的无线

29	if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {

30	Parcelable parcelableExtra = intent

31	.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);

32	if (null != parcelableExtra) {

33	NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;

34	State state = networkInfo.getState();

35	booleanisConnected = state == State.CONNECTED;// 当然，这边可以更精确的确定状态

36	Log.e("H3c", "isConnected" + isConnected);

37	if (isConnected) {

38

} else {

39

40

}

41

}

42

}

43	// 这个监听网络连接的设置，包括wifi和移动数据的打开和关闭。.

44	// 最好用的还是这个监听。wifi如果打开，关闭，以及连接上可用的连接都会接到监听。见log

45	// 这个广播的最大弊端是比上边两个广播的反应要慢，如果只是要监听wifi，我觉得还是用上边两个配合比较合适

46	if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {

47	<p>   ConnectivityManager manager = (ConnectivityManager) context

48	    .getSystemService(Context.CONNECTIVITY_SERVICE);

49	      NetworkInfo gprs = manager

50	    .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

51	      NetworkInfo wifi = manager

52	&nbsp;&nbsp;&nbsp;&nbsp;.getNetworkInfo(ConnectivityManager.TYPE_WIFI);</p><p>&nbsp;&nbsp;  Log.i(TAG, "网络状态改变:"+ wifi.isConnected() + " 3g:" + gprs.isConnected());</p><p>            NetworkInfo info = intent

53	.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

54	if (info != null) {

55	Log.e("H3c", "info.getTypeName()" + info.getTypeName());

56	Log.e("H3c", "getSubtypeName()" + info.getSubtypeName());

57	Log.e("H3c", "getState()" + info.getState());

58	Log.e("H3c", "getDetailedState()"

59	+ info.getDetailedState().name());

60	Log.e("H3c", "getDetailedState()" + info.getExtraInfo());

61	Log.e("H3c", "getType()" + info.getType());

62

63	if (NetworkInfo.State.CONNECTED == info.getState()) {

64	} else if (info.getType() == 1) {

65	if (NetworkInfo.State.DISCONNECTING == info.getState()) {

66

67

}

68

}

69

}

70

}

71

}

72

}</p>