判断是Wifi联网，还是手机联网

try {
    ConnectivityManager manager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = manager.getActiveNetworkInfo();
    if (info == null) {
        // 网络关闭
        Toast.makeText(this, "没网络", Toast.LENGTH_SHORT).show();
    } else {
        // 网络开启
        // 判断网络是wifi还是mobileNetworkInfo
        wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (wifi != null && wifi.isConnected()) {
            Toast.makeText(this, "wifi网络", Toast.LENGTH_SHORT).show();
            video.setUp("http://2449.vod.myqcloud.com/2449_22ca37a6ea9011e5acaaf51d105342e3.f20.mp4", JCVideoPlayerStandard.SCREEN_LAYOUT_NORMAL, "嫂子闭眼睛");
        }
        NetworkInfo mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (mobile != null && mobile.isConnected()) {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setMessage("当前是4G加载是否继续");
            builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    video.setUp("http://2449.vod.myqcloud.com/2449_22ca37a6ea9011e5acaaf51d105342e3.f20.mp4", JCVideoPlayerStandard.SCREEN_LAYOUT_NORMAL, "嫂子闭眼睛");
                }
            });
            builder.setNegativeButton("取消",null);
            AlertDialog dialog = builder.create();
            dialog.show();
        }
    }
} catch (Exception e) {

    e.printStackTrace();
}