/**
 * 跟網路相關的工具類
 * Created by leven on 2016/10/13.
 */

public class NetUtils {

    private NetUtils() {
                /* cannot be instantiated */
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判斷網路是否連線
     *
     * @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;
    }

    /**
     * 判斷是否是wifi連線
     */
    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;

    }

    /**
     * 開啟網路設定介面
     */
    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);
    }

}