android广播监控wifi连接状态

package com.example.floatdialogtest;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;

public class WifiReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if(intent.getAction().equals(WifiManager.RSSI_CHANGED_ACTION)){
//signal strength changed
}
else if(intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)){//wifi连接上与否
System.out.println("网络状态改变");
NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
if(info.getState().equals(NetworkInfo.State.DISCONNECTED)){
System.out.println("wifi网络连接断开");
}
else if(info.getState().equals(NetworkInfo.State.CONNECTED)){

WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();

//获取当前wifi名称
System.out.println("连接到网络 " + wifiInfo.getSSID());

}

}
else if(intent.getAction().equals(WifiManager.WIFI_STATE_CHANGED_ACTION)){//wifi打开与否
int wifistate = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_DISABLED);

if(wifistate == WifiManager.WIFI_STATE_DISABLED){
System.out.println("系统关闭wifi");
}
else if(wifistate == WifiManager.WIFI_STATE_ENABLED){
System.out.println("系统开启wifi");
}
}
}
}

权限

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

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

receiver intetfilter

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