BroadcastReceiver获取手机网络状态

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public class NetReceiver extends BroadcastReceiver {/** * 枚举网络状态 NET_NO：没有网络 NET_2G:2g网络 NET_3G：3g网络 NET_4G：4g网络 NET_WIFI：wifi * NET_UNKNOWN：未知网络 */public static enum NetState {NET_NO, NET_2G, NET_3G, NET_4G,NET_WIFI, NET_MOBILE, NET_UNKNOWN};public static List<NetEventHandle> ehList = new ArrayList<NetEventHandle>();public static interface NetEventHandle {/** * 网络状态码 *  * @param netCode */void netState(NetState netCode);}@Overridepublic void onReceive(Context context, Intent intent) {// 向所有实现接口的activity传递消息for (NetEventHandle e : ehList) {e.netState(isConnected(context));}}/** * 判断当前是否网络连接 *  * @param context * @return 状态码 */public NetState isConnected(Context context) {NetState stateCode = NetState.NET_NO;ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo ni = cm.getActiveNetworkInfo();if (ni != null && ni.isConnectedOrConnecting()) {switch (ni.getType()) {case ConnectivityManager.TYPE_WIFI:stateCode = NetState.NET_WIFI;break;case ConnectivityManager.TYPE_MOBILE:switch (ni.getSubtype()) {case TelephonyManager.NETWORK_TYPE_GPRS: // 联通2gcase TelephonyManager.NETWORK_TYPE_CDMA: // 电信2gcase TelephonyManager.NETWORK_TYPE_EDGE: // 移动2gcase TelephonyManager.NETWORK_TYPE_1xRTT:case TelephonyManager.NETWORK_TYPE_IDEN:stateCode = NetState.NET_2G;break;case TelephonyManager.NETWORK_TYPE_EVDO_A: // 电信3gcase TelephonyManager.NETWORK_TYPE_UMTS:case TelephonyManager.NETWORK_TYPE_EVDO_0:case TelephonyManager.NETWORK_TYPE_HSDPA:case TelephonyManager.NETWORK_TYPE_HSUPA:case TelephonyManager.NETWORK_TYPE_HSPA:case TelephonyManager.NETWORK_TYPE_EVDO_B:// case TelephonyManager.NETWORK_TYPE_EHRPD:// case TelephonyManager.NETWORK_TYPE_HSPAP:stateCode = NetState.NET_3G;break;// case TelephonyManager.NETWORK_TYPE_LTE:// stateCode = NetState.NET_4G;// break;default:stateCode = NetState.NET_MOBILE;}break;default:stateCode = NetState.NET_UNKNOWN;}}return stateCode;}}

别忘了在AndroidMinestfest.xml中静态注册：

<receiver android:name=".NetReceiver" >            <intent-filter>                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />            </intent-filter>        </receiver>

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