Android 监听wifi广播的两种方式

转自哈希Map的博客 ：http://blog.csdn.net/h3c4lenovo/article/details/9627781

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()) {

                     }
                 }
             }
         }
     }
 }</p>