全局监测网络变化并提示

APP开发中，网络已成为一款应用的必须的，有时需求需要随时监测网络变化，实现起来其实很简单：

1.创建广播接受者

public class NetWorkChangeReceiver extends BroadcastReceiver {

    public NetWorkChangeReceiver() {
        super();
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager connectMgr = (ConnectivityManager) getActivity()
                        .getSystemService(Context.CONNECTIVITY_SERVICE);
                NetworkInfo mobNetInfo = connectMgr
                        .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
                NetworkInfo wifiNetInfo = connectMgr
                        .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
                if (!mobNetInfo.isConnected() && !wifiNetInfo.isConnected()) {
                    /**unconnect network*/
                    ZLog.i("net connect -->fasle");
                    mNetStatus.setText(R.string.net_offline);//网络断开连接
                } else {
                    /**connect network*/
                    ZLog.i("net connect -->true");
                    mNetStatus.setText(R.string.net_online);//网络已连接
                }
    }

}

2.在BaseActivity的onStart()方法中启动服务

@Override
    protected void onStart() {
        IntentFilter filter = new IntentFilter();
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        registerReceiver(new NetWorkChangeReceiver(), filter);
        super.onStart();
    }

在onStop()中注销广播

@Override
    protected void onStop() {
        unregisterReceiver(mNetWorkChangeReceiver);
        super.onStop();
    }