Android 广播监听wifi

<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>

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 

IntentFilter filter = new IntentFilter();
/**
 *     NETWORK_STATE_CHANGED_ACTION
 *  
 *  　　wifi是否连接正常
 *  
 */
filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);

/**
 *     WIFI_STATE_CHANGED_ACTION
 *  
 *     有无wifi源及各个状态间转变
 *  
 */
filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);

/**
 * 　　CONNECTIVITY_ACTION
 * 
 * 　　wifi如果打开，关闭，以及连接上可用的连接都会接到监听
 * 　　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  
 * 
 */
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(new NetworkConnectChangedReceiver(new NetworkConnectChangedActionImp()), filter);

import android.content.Context;
import android.content.Intent;

public interface NetworkConnectChangedAction {
    
    void doAfterCONNECTED(Context context , Intent intent);
    void doAfterCONNECTING(Context context , Intent intent);
    void doAfterDISCONNECTED (Context context , Intent intent);
    void doAfterDISCONNECTING (Context context , Intent intent);
    void doAfterSUSPENDED(Context context , Intent intent);
    void doAfterUNKNOWN(Context context , Intent intent);
}

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class NetworkConnectChangedReceiver extends BroadcastReceiver {

    private static NetworkConnectChangedAction action = null;
    
    static{
        action =  new NetworkConnectChangedActionImp();
    }

    @Override
    public void onReceive(Context context, Intent intent ) {
    
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            /**
             *  GPRS
             */
            //NetworkInfo gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            /**
             *  INFO
             */
            //NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
            /**
             *     WIFI
             */
            NetworkInfo wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);    
            if (wifi != null) {
                if (NetworkInfo.State.CONNECTED == wifi.getState()) {
                    action.doAfterCONNECTED(context, intent);    
                } else if (NetworkInfo.State.CONNECTING  == wifi.getState()) {
                    action.doAfterCONNECTING(context, intent);
                } else if (NetworkInfo.State.DISCONNECTED  == wifi.getState()) {
                    action.doAfterDISCONNECTED(context, intent);
                } else if (NetworkInfo.State.DISCONNECTING  == wifi.getState()) {
                    action.doAfterDISCONNECTING(context, intent);
                } else if (NetworkInfo.State.SUSPENDED  == wifi.getState()) {
                    action.doAfterSUSPENDED(context, intent);
                } else if (NetworkInfo.State.UNKNOWN  == wifi.getState()) {
                    action.doAfterUNKNOWN(context, intent);
                }
            }
        }
    
    }
}

import android.content.Context;
import android.content.Intent;

public class NetworkConnectChangedActionImp implements NetworkConnectChangedAction{

    @Override
    public void doAfterCONNECTED(Context context, Intent intent) {}

    @Override
    public void doAfterCONNECTING(Context context, Intent intent) {}

    @Override
    public void doAfterDISCONNECTED(Context context, Intent intent) {}

    @Override
    public void doAfterDISCONNECTING(Context context, Intent intent) {}

    @Override
    public void doAfterSUSPENDED(Context context, Intent intent) {}

    @Override
    public void doAfterUNKNOWN(Context context, Intent intent) {}
    
}