监控网络状态的变化

        IntentFilter filter = new IntentFilter();
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);

        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = connectivityManager.getActiveNetworkInfo();
        Log.d("hbh", "onReceive: ================ net receive");
        if (info != null && info.isAvailable()) {
            int netType = info.getType();
            if (netType == ConnectivityManager.TYPE_WIFI) {
                int downCount = SharedPrefUtils.getInstance(context).getInt(Constants.DOWNLOAD_COUNT);
                String updateStatus = SharedPrefUtils.getInstance(context).getString(Constants.UPDATE_STATUS);
                Log.i("hbh", "onReceive connection wifi, has downCount = " + downCount + ", updateStaus = " + updateStatus);
                if (Constants.UPDATE_STATUS_DOWNING.equals(updateStatus) && (downCount >= 4 && downCount <= 6)) {
                }
            } else if (netType == ConnectivityManager.TYPE_MOBILE) {
                Log.i("hbh", "onReceive connection mobile data");
            }
        } else {
            Log.e("hbh", "onReceive: no net");
        }