Android实时监听网络状态（1）

其实手机在网络方面的的监听也比较重要，有时候我们必须实时监控这个程序的实时网络状态，android在网络断开与连接的时候都会发出广播，我们通过接收系统的广播就可以实现网络的监听。

1、添加访问网络和获取网络状态的权限

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

2、新建一个Application类并继承android.app.Application 申明变量保存网络状态

package com.javen.netbroadcast;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo.State;

public class NetUtil {
public static final int NETWORN_NONE = 0;
public static final int NETWORN_WIFI = 1;
public static final int NETWORN_MOBILE = 2;

public static int getNetworkState(Context context) {
ConnectivityManager connManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);

// Wifi
State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
.getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return NETWORN_WIFI;
}

// 3G
state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
.getState();
if (state == State.CONNECTED || state == State.CONNECTING) {
return NETWORN_MOBILE;
}
return NETWORN_NONE;
}
}

NetUtil