android 通过广播监听网络连接状况

首先添加以下权限

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

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

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

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

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

new一个广播NetStateChangeBroadcast

package aviationboss.broadcast;



import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.net.ConnectivityManager;

import android.net.NetworkInfo.State;

import android.util.Log;

import android.widget.Toast;

import aviationboss.data.SystemData;



public class NetStateChangeBroadcast extends BroadcastReceiver {

    private ConnectivityManager connectivity;

    private boolean isConnect = false;



    @Override

    public void onReceive(Context arg0, Intent arg1) {

        // TODO Auto-generated method stub

        connectivity = (ConnectivityManager) arg0

                .getSystemService(arg0.CONNECTIVITY_SERVICE);

        State wifiState = connectivity.getNetworkInfo(

                ConnectivityManager.TYPE_WIFI).getState();

        if (State.CONNECTED == wifiState) {

            isConnect = true;

        }

        

        if(connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)!=null){

            State mobileState = connectivity.getNetworkInfo(

                    ConnectivityManager.TYPE_MOBILE).getState();

            if (State.CONNECTED == mobileState) {

                isConnect = true;

            }

        }

        

        Intent intent = new Intent();

        intent.setAction("netConnect");



        if (isConnect) {

            if (!SystemData.NetState) {

                Toast.makeText(arg0, "网络已连接", Toast.LENGTH_SHORT).show();

                SystemData.NetState = true;

                intent.putExtra("netActions", "网络已连接");

                arg0.sendBroadcast(intent);

            }

        } else {

            if (SystemData.NetState) {

                Toast.makeText(arg0, "网络已断开", Toast.LENGTH_SHORT).show();

                SystemData.NetState = false;

                intent.putExtra("netActions", "网络已断开");

                arg0.sendBroadcast(intent);

            }

        }

    }

}

判断wifi的连接状态

connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState()

判断移动网的连接状态

connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState()

 

在配置文件中添加该广播，并设置监听的动作

<receiver android:name="aviationboss.broadcast.NetStateChangeBroadcast" >

    <intent-filter>

        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />

    </intent-filter>

</receiver>