Android 跟网络连接相关的工具类

来源：互联网发布：中国电信宽带网络测速编辑：程序博客网时间：2024/06/07 12:04
public class NetUtils {    private NetUtils() {        /** cannot be instantiated **/        throw new UnsupportedOperationException("cannot be instantiated");    }    /**     * 判断网络是否连接     *     * @param context     * @return     */    public static boolean isConnected(Context context) {        ConnectivityManager connectivity = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (null != connectivity) {            NetworkInfo info = connectivity.getActiveNetworkInfo();            if (null != info && info.isConnected()) {                if (info.getState() == NetworkInfo.State.CONNECTED) {                    return true;                }            }        }        return false;    }    /**     * 判断是否是wifi连接     */    public static boolean isWifi(Context context) {        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (cm == null)            return false;        return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;    }    /**     * 打开网络设置界面     */    public static void openSetting(Activity activity) {        Intent intent = new Intent("/");        ComponentName cm = new ComponentName("com.android.settings",                "com.android.settings.WirelessSettings");        intent.setComponent(cm);        intent.setAction("android.intent.action.VIEW");        activity.startActivityForResult(intent, 0);    }}
0 0