Android(安卓)下网络状态监听

最近在做网络监听的时候发现原来用的 NetworkInfo 中好多方法已经过期，so 看了下SDK及文档现将最新方法记录下。

//获取网络连接管理ConnectivityManager connectivityManager =  (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);//获取正在使用的网络信息NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();if(networkInfo != null && networkInfo.isConnected()){    //有网    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {        //sdk大于21        NetworkCapabilities capabilities =connectivityManager.getNetworkCapabilities(connectivityManager.getActiveNetwork());        if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {            //蜂窝网络            Log.e("test","蜂窝网络>>>>>>>>");            return;        }        if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {            //wifi            Log.e("test","wifi>>>>>>>>");            return;        }        if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH)) {            //蓝牙            Log.e("test","蓝牙>>>>>>>>");            return;        }        if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {            //以太网            Log.e("test","以太网>>>>>>>>");            return;        }        if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {            //VPN            Log.e("test","VPN>>>>>>>>");            return;        }                    } else {         //sdk小于21       switch (networkInfo.getType()) {            case ConnectivityManager.TYPE_MOBILE:                break;            case ConnectivityManager.TYPE_WIFI:                break;            case ConnectivityManager.TYPE_ETHERNET:                break;            case ConnectivityManager.TYPE_VPN:                break;            case ConnectivityManager.TYPE_BLUETOOTH:                break;            default:                break;        }     }} else {    //无网}

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