android NetworkUtils

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import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.net.NetworkInfo.State;/** * 网络判断工具类 *  * @author http://xiaxveliang.blog.163.com * */public final class NetworkUtils {    /**     * 判断网络链接是否OK(包括WIFI,ETHERNET,GPRS等)     *      * @param mContext     * @return     */    public static boolean isConnect(Context context) {        if (context == null) {            return false;        }        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (cm == null) {            return false;        }        NetworkInfo ni = cm.getActiveNetworkInfo();        if (ni == null) {            return false;        }        if (ni.getState() == State.CONNECTED) {            return true;        }        return false;    }    /**     * WIFI,ETHERNET链接正常     *      * @param mContext     * @return     */    public static boolean isWifiEthernetConnect(Context context) {        if (context == null) {            return false;        }        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (cm == null) {            return false;        }        NetworkInfo ni = cm.getActiveNetworkInfo();        if (ni == null) {            return false;        }        if (ni.getState() == State.CONNECTED                && (ni.getType() == ConnectivityManager.TYPE_WIFI || ni                        .getType() == ConnectivityManager.TYPE_ETHERNET)) {            return true;        }        return false;    }    /**     * GPRS(2G,3G,4G)     *      * @param mContext     * @return     */    public static boolean isMobileConnect(Context context) {        if (context == null) {            return false;        }        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (cm == null) {            return false;        }        NetworkInfo ni = cm.getActiveNetworkInfo();        if (ni == null) {            return false;        }        if (ni.getState() == State.CONNECTED                && ni.getType() == ConnectivityManager.TYPE_MOBILE) {            return true;        }        return false;    }}
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