NetWorkUtil网络状态

来源：互联网发布：内外网络切换器原理编辑：程序博客网时间：2024/06/04 22:30

1.首先呢，我们设置网络状态的常量

public class NetWorkStatusConstants {    /**     * Unknown network class     */    public static final int NETWORK_CLASS_UNKNOWN = 0;    /**     * wifi networks     */    public static final int NETWORK_WIFI          = 1;    /**     * "2G" networks     */    public static final int NETWORK_CLASS_2_G     = 2;    /**     * "3G" networks     */    public static final int NETWORK_CLASS_3_G     = 3;    /**     * "4G" networks     */    public static final int NETWORK_CLASS_4_G     = 4;}

NetWorkUtil

public class NetWorkUtil {    /**     * 获得网络连接是否可用     * @param context     * @return     */    public static boolean hasNetwork(Context context) {        ConnectivityManager con = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo workinfo = con.getActiveNetworkInfo();        if (workinfo == null || !workinfo.isAvailable()) {            return false;        }        return true;    }    /**     * 判断是否是wifi连接     */    public static boolean checkWifiState(Context context) {        boolean isWifiConnect = true;        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo[] networkInfos = cm.getAllNetworkInfo();        for (int i = 0; i < networkInfos.length; i++) {            if (networkInfos[i].getState() == NetworkInfo.State.CONNECTED) {                if (networkInfos[i].getType() == cm.TYPE_MOBILE) {                    isWifiConnect = false;                }                if (networkInfos[i].getType() == cm.TYPE_WIFI) {                    isWifiConnect = true;                }            }        }        return isWifiConnect;    }    /**     * 获取手机连接的网络类型状态 WIFI/2G/3G/4G     */    public static int getNetWorkStatus(Context context) {        int netWorkType = NetWorkStatusConstants.NETWORK_CLASS_UNKNOWN;        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();        if (networkInfo != null && networkInfo.isConnected()) {            int type = networkInfo.getType();            if (type == ConnectivityManager.TYPE_WIFI) {                netWorkType = NetWorkStatusConstants.NETWORK_WIFI;            } else if (type == ConnectivityManager.TYPE_MOBILE) {                netWorkType = getNetWorkClass(context);            }        }        return netWorkType;    }    /**     * 获取手机连接的网络类型是2G/3G/4G     */    public static int getNetWorkClass(Context context) {        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);        switch (telephonyManager.getNetworkType()) {            case TelephonyManager.NETWORK_TYPE_GPRS:            case TelephonyManager.NETWORK_TYPE_EDGE:            case TelephonyManager.NETWORK_TYPE_CDMA:            case TelephonyManager.NETWORK_TYPE_1xRTT:            case TelephonyManager.NETWORK_TYPE_IDEN:                return NetWorkStatusConstants.NETWORK_CLASS_2_G;            case TelephonyManager.NETWORK_TYPE_UMTS:            case TelephonyManager.NETWORK_TYPE_EVDO_0:            case TelephonyManager.NETWORK_TYPE_EVDO_A:            case TelephonyManager.NETWORK_TYPE_HSDPA:            case TelephonyManager.NETWORK_TYPE_HSUPA:            case TelephonyManager.NETWORK_TYPE_HSPA:            case TelephonyManager.NETWORK_TYPE_EVDO_B:            case TelephonyManager.NETWORK_TYPE_EHRPD:            case TelephonyManager.NETWORK_TYPE_HSPAP:                return NetWorkStatusConstants.NETWORK_CLASS_3_G;            case TelephonyManager.NETWORK_TYPE_LTE:                return NetWorkStatusConstants.NETWORK_CLASS_4_G;            default:                return NetWorkStatusConstants.NETWORK_CLASS_UNKNOWN;        }    }}

使用

 int netWorkStatus = NetWorkUtil.getNetWorkStatus(MainActivity.this);

 if (NetWorkStatusConstants.NETWORK_WIFI == netWorkStatus) {                                DownloadUtil downloadUtil = new DownloadUtil(MainActivity.this);                                downloadUtil.download(HttpUrlConstants.SERVER_RESOUSE_URL + url);                            }else if (NetWorkStatusConstants.NETWORK_CLASS_UNKNOWN == netWorkStatus) {                                ToastUtil.showMsg(MainActivity.this, "网络不可用,请检查网络");                            } else {                                dialog1 = UiUtil.createDialog(MainActivity.this, "温馨提示", "取消", "更新", "处于移动网络,是否下载!", new View.OnClickListener() {                                            @Override                                            public void onClick(View view) {                                                if ((boolean) view.getTag()) {                                                    dialog1.dismiss();                                                } else {                                                    dialog1.dismiss();                                                    DownloadUtil downloadUtil = new DownloadUtil(MainActivity.this);                                                    downloadUtil.download(HttpUrlConstants.SERVER_RESOUSE_URL + url);                                                }                                            }                                        }                                );                            }

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