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
package com.example.testss;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.net.wifi.WifiManager;
import android.os.Parcelable;
import android.util.Log;
public class NetworkConnectChangedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
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
int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
Log.e("H3c", "wifiState" + wifiState);
switch (wifiState) {
case WifiManager.WIFI_STATE_DISABLED:
break;
case WifiManager.WIFI_STATE_DISABLING:
break;
//
}
}
// 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。
// 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
if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {
Parcelable parcelableExtra = intent
.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
if (null != parcelableExtra) {
NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;
State state = networkInfo.getState();
boolean isConnected = state == State.CONNECTED;// 当然，这边可以更精确的确定状态
Log.e("H3c", "isConnected" + isConnected);
if (isConnected) {
} else {
}
}
}
// 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。.
// 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
// 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
if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
<p> ConnectivityManager manager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo gprs = manager
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
NetworkInfo wifi = manager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);</p><p> Log.i(TAG, "网络状态改变:" + wifi.isConnected() + " 3g:" + gprs.isConnected());</p><p>NetworkInfo info = intent
.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
if (info != null) {
Log.e("H3c", "info.getTypeName()" + info.getTypeName());
Log.e("H3c", "getSubtypeName()" + info.getSubtypeName());
Log.e("H3c", "getState()" + info.getState());
Log.e("H3c", "getDetailedState()"
+ info.getDetailedState().name());
Log.e("H3c", "getDetailedState()" + info.getExtraInfo());
Log.e("H3c", "getType()" + info.getType());
if (NetworkInfo.State.CONNECTED == info.getState()) {
} else if (info.getType() == 1) {
if (NetworkInfo.State.DISCONNECTING == info.getState()) {
}
}
}
}
}
}
