public class NetStateReceiver extends BroadcastReceiver {private Handler handler;public NetStateReceiver(Handler handler) {this.handler = handler;}@Overridepublic void onReceive(Context context, Intent arg1) {ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);NetworkInfo wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);if (!gprs.isConnected() && !wifi.isConnected()) {System.out.println("网络已断开");SysUtils.sendHandlerMsg(handler, SysConstant.MSG_NET_CONN_DISS);}if (gprs.isConnected() || wifi.isConnected()) {System.out.println("网络已连接");SysUtils.sendHandlerMsg(handler, SysConstant.MSG_NET_CONN_CONN);}}}

public class MyActivity extends Activity {/** 网络连接状态 true:连接;false:断开 */public boolean netState = false;private NetStateReceiver receiver;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);int device = GpdService.DEVICE_TYPE_SCANNER;// 一维或二维条码扫描头MyGpdUtils.startGpdService(this, device);// 注册广播接收者receiver = new NetStateReceiver(handler);IntentFilter filter = new IntentFilter();filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(receiver, filter);receiver.onReceive(this, null);}Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {switch (msg.what) {case SysConstant.MSG_NET_CONN_DISS:// 网络断开MyGpdUtils.playSound("网络连接已断开");netState = false;break;case SysConstant.MSG_NET_CONN_CONN:// 网络连接// MyGpdUtils.playSound("网络已连接");netState = true;break;}};};}

                /** 网络连接消息 */public static final int MSG_NET_CONN_DISS = 222;public static final int MSG_NET_CONN_CONN = 223;